Tree

Number of Descendants

{a} (6 descendants)
- {a, b} (12 descendants)
  - {a, b, a^2} (20 descendants)
    - {a, b, a^2, ab} (30 descendants)
      - {a, b, a^2, ab, ba} (42 descendants)
        
        {a, b, a^2, b^2, ab, ba}
        
        {a, b, a^2, a^3, ab, ba}
        
        {a, b, a^2, ab, ba, a^2b}
        
        {a, b, a^2, ab, ba, aba}
        
        {a, b, a^2, ab, a(b^2), ba}
        
        {a, b, a^2, ab, ba, b(a^2)}
        
        {a, b, a^2, ab, ba, bab}
        
        {a, b, a^2, ab, ba, b^2a}
        
        {a, b, a^2, b^3, ab, ba}
        
        {a, b, a^2, a^4, ab, ba}
        
        {a, b, a^2, ab, ba, a^3b}
        
        {a, b, a^2, ab, ba, a^2ba}
        
        {a, b, a^2, ab, ba, a^2(b^2)}
        
        {a, b, a^2, ab, ba, ab(a^2)}
        
        {a, b, a^2, ab, ba, abab}
        
        {a, b, a^2, ab, ba, a(b^2)a}
        
        {a, b, a^2, ab, a(b^3), ba}
        
        {a, b, a^2, ab, ba, b(a^3)}
        
        {a, b, a^2, ab, ba, b(a^2)b}
        
        {a, b, a^2, ab, ba, baba}
        
        {a, b, a^2, ab, ba, ba(b^2)}
        
        {a, b, a^2, ab, ba, b^2(a^2)}
        
        {a, b, a^2, ab, ba, b^2ab}
        
        {a, b, a^2, ab, ba, b^3a}
        
        {a, b, a^2, a^5, ab, ba}
        
        {a, b, a^2, ab, ba, a^4b}
        
        {a, b, a^2, ab, ba, a^3ba}
        
        {a, b, a^2, ab, ba, a^2b(a^2)}
        
        {a, b, a^2, ab, ba, a^2bab}
        
        {a, b, a^2, ab, ba, a^2(b^2)a}
        
        {a, b, a^2, ab, ba, ab(a^3)}
        
        {a, b, a^2, ab, ba, ab(a^2)b}
        
        {a, b, a^2, ab, ba, ababa}
        
        {a, b, a^2, ab, ba, a(b^2)(a^2)}
        
        {a, b, a^2, ab, ba, a(b^2)ab}
        
        {a, b, a^2, ab, ba, a(b^3)a}
        
        {a, b, a^2, ab, ba, b(a^4)}
        
        {a, b, a^2, ab, ba, b(a^3)b}
        
        {a, b, a^2, ab, ba, b(a^2)ba}
        
        {a, b, a^2, ab, ba, bab(a^2)}
        
        {a, b, a^2, ab, ba, babab}
        
        {a, b, a^2, ab, ba, ba(b^2)a}
      - {a, b, a^2, b^2, ab} (41 descendants)
        
        {a, b, a^2, a^3, b^2, ab}
        
        {a, b, a^2, b^2, ab, a^2b}
        
        {a, b, a^2, b^2, ab, aba}
        
        {a, b, a^2, b^2, ab, a(b^2)}
        
        {a, b, a^2, b^2, ab, b(a^2)}
        
        {a, b, a^2, b^2, ab, bab}
        
        {a, b, a^2, b^2, ab, b^2a}
        
        {a, b, a^2, b^2, b^3, ab}
        
        {a, b, a^2, a^4, b^2, ab}
        
        {a, b, a^2, b^2, ab, a^3b}
        
        {a, b, a^2, b^2, ab, a^2ba}
        
        {a, b, a^2, b^2, ab, a^2(b^2)}
        
        {a, b, a^2, b^2, ab, ab(a^2)}
        
        {a, b, a^2, b^2, ab, abab}
        
        {a, b, a^2, b^2, ab, a(b^2)a}
        
        {a, b, a^2, b^2, ab, a(b^3)}
        
        {a, b, a^2, b^2, ab, b(a^3)}
        
        {a, b, a^2, b^2, ab, b(a^2)b}
        
        {a, b, a^2, b^2, ab, ba(b^2)}
        
        {a, b, a^2, b^2, ab, b^2(a^2)}
        
        {a, b, a^2, b^2, ab, b^2ab}
        
        {a, b, a^2, b^2, ab, b^3a}
        
        {a, b, a^2, b^2, b^4, ab}
        
        {a, b, a^2, a^5, b^2, ab}
        
        {a, b, a^2, b^2, ab, a^4b}
        
        {a, b, a^2, b^2, ab, a^3(b^2)}
        
        {a, b, a^2, b^2, ab, a^2b(a^2)}
        
        {a, b, a^2, b^2, ab, a^2bab}
        
        {a, b, a^2, b^2, ab, a^2(b^3)}
        
        {a, b, a^2, b^2, ab, ab(a^3)}
        
        {a, b, a^2, b^2, ab, ab(a^2)b}
        
        {a, b, a^2, b^2, ab, aba(b^2)}
        
        {a, b, a^2, b^2, ab, a(b^2)(a^2)}
        
        {a, b, a^2, b^2, ab, a(b^2)ab}
        
        {a, b, a^2, b^2, ab, a(b^4)}
        
        {a, b, a^2, b^2, ab, b^2(a^3)}
        
        {a, b, a^2, b^2, ab, b^2(a^2)b}
        
        {a, b, a^2, b^2, ab, b^2a(b^2)}
        
        {a, b, a^2, b^2, ab, b^3(a^2)}
        
        {a, b, a^2, b^2, ab, b^3ab}
        
        {a, b, a^2, b^2, b^5, ab}
      - {a, b, a^2, a^3, ab} (40 descendants)
        
        {a, b, a^2, a^3, ab, a^2b}
        
        {a, b, a^2, a^3, ab, aba}
        
        {a, b, a^2, a^3, ab, a(b^2)}
        
        {a, b, a^2, a^3, ab, b(a^2)}
        
        {a, b, a^2, a^3, ab, bab}
        
        {a, b, a^2, a^3, ab, b^2a}
        
        {a, b, a^2, a^3, b^3, ab}
        
        {a, b, a^2, a^3, a^4, ab}
        
        {a, b, a^2, a^3, ab, a^3b}
        
        {a, b, a^2, a^3, ab, a^2ba}
        
        {a, b, a^2, a^3, ab, a^2(b^2)}
        
        {a, b, a^2, a^3, ab, ab(a^2)}
        
        {a, b, a^2, a^3, ab, abab}
        
        {a, b, a^2, a^3, ab, a(b^2)a}
        
        {a, b, a^2, a^3, ab, a(b^3)}
        
        {a, b, a^2, a^3, ab, b(a^3)}
        
        {a, b, a^2, a^3, ab, b(a^2)b}
        
        {a, b, a^2, a^3, ab, b^2(a^2)}
        
        {a, b, a^2, a^3, ab, b^2ab}
        
        {a, b, a^2, a^3, a^5, ab}
        
        {a, b, a^2, a^3, ab, a^4b}
        
        {a, b, a^2, a^3, ab, a^3ba}
        
        {a, b, a^2, a^3, ab, a^3(b^2)}
        
        {a, b, a^2, a^3, ab, a^2b(a^2)}
        
        {a, b, a^2, a^3, ab, a^2bab}
        
        {a, b, a^2, a^3, ab, ab(a^3)}
        
        {a, b, a^2, a^3, ab, ab(a^2)b}
        
        {a, b, a^2, a^3, ab, a(b^2)(a^2)}
        
        {a, b, a^2, a^3, ab, a(b^2)ab}
        
        {a, b, a^2, a^3, ab, b(a^4)}
        
        {a, b, a^2, a^3, ab, b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, ab}
        
        {a, b, a^2, a^3, ab, a^5b}
        
        {a, b, a^2, a^3, ab, a^3b(a^2)}
        
        {a, b, a^2, a^3, ab, a^3bab}
        
        {a, b, a^2, a^3, ab, a^2b(a^3)}
        
        {a, b, a^2, a^3, ab, ab(a^4)}
        
        {a, b, a^2, a^3, ab, a(b^2)(a^3)}
        
        {a, b, a^2, a^3, a^7, ab}
        
        {a, b, a^2, a^3, ab, a^3b(a^3)}
      - {a, b, a^2, ab, a^2b} (39 descendants)
        
        {a, b, a^2, ab, a^2b, aba}
        
        {a, b, a^2, ab, a(b^2), a^2b}
        
        {a, b, a^2, ab, b(a^2), a^2b}
        
        {a, b, a^2, ab, a^2b, bab}
        
        {a, b, a^2, ab, a^2b, b^2a}
        
        {a, b, a^2, b^3, ab, a^2b}
        
        {a, b, a^2, a^4, ab, a^2b}
        
        {a, b, a^2, ab, a^2b, a^3b}
        
        {a, b, a^2, ab, a^2b, a^2ba}
        
        {a, b, a^2, ab, a^2b, a^2(b^2)}
        
        {a, b, a^2, ab, a^2b, ab(a^2)}
        
        {a, b, a^2, ab, a^2b, abab}
        
        {a, b, a^2, ab, a^2b, a(b^2)a}
        
        {a, b, a^2, ab, a(b^3), a^2b}
        
        {a, b, a^2, ab, b(a^3), a^2b}
        
        {a, b, a^2, ab, a^2b, b(a^2)b}
        
        {a, b, a^2, ab, a^2b, b^2(a^2)}
        
        {a, b, a^2, ab, a^2b, b^2ab}
        
        {a, b, a^2, a^5, ab, a^2b}
        
        {a, b, a^2, ab, a^2b, a^4b}
        
        {a, b, a^2, ab, a^2b, a^2b(a^2)}
        
        {a, b, a^2, ab, a^2b, a^2bab}
        
        {a, b, a^2, ab, a^2b, a^2(b^2)a}
        
        {a, b, a^2, ab, a^2b, a^2(b^3)}
        
        {a, b, a^2, ab, a^2b, ab(a^3)}
        
        {a, b, a^2, ab, a^2b, ab(a^2)b}
        
        {a, b, a^2, ab, a^2b, a(b^2)(a^2)}
        
        {a, b, a^2, ab, a^2b, a(b^2)ab}
        
        {a, b, a^2, ab, a^2b, b(a^3)b}
        
        {a, b, a^2, ab, a^2b, b^2(a^2)b}
        
        {a, b, a^2, ab, a^2b, a^5b}
        
        {a, b, a^2, ab, a^2b, a^2b(a^3)}
        
        {a, b, a^2, ab, a^2b, a^2b(a^2)b}
        
        {a, b, a^2, ab, a^2b, a^2(b^2)(a^2)}
        
        {a, b, a^2, ab, a^2b, a^2(b^2)ab}
        
        {a, b, a^2, ab, a^2b, ab(a^3)b}
        
        {a, b, a^2, ab, a^2b, a(b^2)(a^2)b}
        
        {a, b, a^2, ab, a^2b, a^2b(a^3)b}
        
        {a, b, a^2, ab, a^2b, a^2(b^2)(a^2)b}
      - {a, b, a^2, ab, aba} (31 descendants)
        
        {a, b, a^2, ab, a(b^2), aba}
        
        {a, b, a^2, ab, b(a^2), aba}
        
        {a, b, a^2, ab, aba, bab}
        
        {a, b, a^2, ab, b^2a, aba}
        
        {a, b, a^2, b^3, ab, aba}
        
        {a, b, a^2, a^4, ab, aba}
        
        {a, b, a^2, ab, a^3b, aba}
        
        {a, b, a^2, ab, aba, a^2ba}
        
        {a, b, a^2, ab, a^2(b^2), aba}
        
        {a, b, a^2, ab, aba, ab(a^2)}
        
        {a, b, a^2, ab, aba, abab}
        
        {a, b, a^2, ab, aba, a(b^2)a}
        
        {a, b, a^2, ab, a(b^3), aba}
        
        {a, b, a^2, ab, b(a^3), aba}
        
        {a, b, a^2, ab, aba, b(a^2)b}
        
        {a, b, a^2, ab, b^2(a^2), aba}
        
        {a, b, a^2, ab, aba, b^2ab}
        
        {a, b, a^2, a^5, ab, aba}
        
        {a, b, a^2, ab, a^4b, aba}
        
        {a, b, a^2, ab, aba, a^2b(a^2)}
        
        {a, b, a^2, ab, aba, a^2bab}
        
        {a, b, a^2, ab, aba, ab(a^3)}
        
        {a, b, a^2, ab, aba, ab(a^2)b}
        
        {a, b, a^2, ab, aba, ababa}
        
        {a, b, a^2, ab, aba, aba(b^2)}
        
        {a, b, a^2, ab, aba, a(b^2)(a^2)}
        
        {a, b, a^2, ab, aba, a(b^2)ab}
        
        {a, b, a^2, ab, aba, ab(a^4)}
        
        {a, b, a^2, ab, aba, ab(a^3)b}
        
        {a, b, a^2, ab, aba, abab(a^2)}
        
        {a, b, a^2, ab, aba, ababab}
      - {a, b, a^2, ab, a(b^2)} (30 descendants)
        
        {a, b, a^2, ab, a(b^2), b(a^2)}
        
        {a, b, a^2, ab, a(b^2), bab}
        
        {a, b, a^2, ab, a(b^2), b^2a}
        
        {a, b, a^2, b^3, ab, a(b^2)}
        
        {a, b, a^2, a^4, ab, a(b^2)}
        
        {a, b, a^2, ab, a(b^2), a^3b}
        
        {a, b, a^2, ab, a(b^2), a^2ba}
        
        {a, b, a^2, ab, a(b^2), a^2(b^2)}
        
        {a, b, a^2, ab, a(b^2), ab(a^2)}
        
        {a, b, a^2, ab, a(b^2), abab}
        
        {a, b, a^2, ab, a(b^2), a(b^2)a}
        
        {a, b, a^2, ab, a(b^2), a(b^3)}
        
        {a, b, a^2, ab, a(b^2), b(a^3)}
        
        {a, b, a^2, ab, a(b^2), b(a^2)b}
        
        {a, b, a^2, ab, a(b^2), b^2(a^2)}
        
        {a, b, a^2, ab, a(b^2), b^2ab}
        
        {a, b, a^2, a^5, ab, a(b^2)}
        
        {a, b, a^2, ab, a(b^2), a^4b}
        
        {a, b, a^2, ab, a(b^2), a^2b(a^2)}
        
        {a, b, a^2, ab, a(b^2), a^2bab}
        
        {a, b, a^2, ab, a(b^2), ab(a^3)}
        
        {a, b, a^2, ab, a(b^2), ab(a^2)b}
        
        {a, b, a^2, ab, a(b^2), a(b^2)(a^2)}
        
        {a, b, a^2, ab, a(b^2), a(b^2)ab}
        
        {a, b, a^2, ab, a(b^2), a(b^3)a}
        
        {a, b, a^2, ab, a(b^2), a(b^4)}
        
        {a, b, a^2, ab, a(b^2), a(b^2)(a^3)}
        
        {a, b, a^2, ab, a(b^2), a(b^2)(a^2)b}
        
        {a, b, a^2, ab, a(b^2), a(b^3)(a^2)}
        
        {a, b, a^2, ab, a(b^2), a(b^3)ab}
      - {a, b, a^2, ab, b(a^2)} (29 descendants)
        
        {a, b, a^2, ab, b(a^2), bab}
        
        {a, b, a^2, ab, b(a^2), b^2a}
        
        {a, b, a^2, b^3, ab, b(a^2)}
        
        {a, b, a^2, a^4, ab, b(a^2)}
        
        {a, b, a^2, ab, b(a^2), a^3b}
        
        {a, b, a^2, ab, b(a^2), a^2ba}
        
        {a, b, a^2, ab, b(a^2), a^2(b^2)}
        
        {a, b, a^2, ab, b(a^2), ab(a^2)}
        
        {a, b, a^2, ab, b(a^2), abab}
        
        {a, b, a^2, ab, b(a^2), a(b^2)a}
        
        {a, b, a^2, ab, a(b^3), b(a^2)}
        
        {a, b, a^2, ab, b(a^2), b(a^3)}
        
        {a, b, a^2, ab, b(a^2), b(a^2)b}
        
        {a, b, a^2, ab, b(a^2), b^2(a^2)}
        
        {a, b, a^2, ab, b(a^2), b^2ab}
        
        {a, b, a^2, a^5, ab, b(a^2)}
        
        {a, b, a^2, ab, b(a^2), a^4b}
        
        {a, b, a^2, ab, b(a^2), a^2b(a^2)}
        
        {a, b, a^2, ab, b(a^2), a^2bab}
        
        {a, b, a^2, ab, b(a^2), ab(a^3)}
        
        {a, b, a^2, ab, b(a^2), ab(a^2)b}
        
        {a, b, a^2, ab, b(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, ab, b(a^2), a(b^2)ab}
        
        {a, b, a^2, ab, b(a^2), bab(a^2)}
        
        {a, b, a^2, ab, b(a^2), b^3(a^2)}
        
        {a, b, a^2, ab, b(a^2), a^3b(a^2)}
        
        {a, b, a^2, ab, b(a^2), a^2(b^2)(a^2)}
        
        {a, b, a^2, ab, b(a^2), abab(a^2)}
        
        {a, b, a^2, ab, b(a^2), a(b^3)(a^2)}
      - {a, b, a^2, ab, bab} (28 descendants)
        
        {a, b, a^2, ab, b^2a, bab}
        
        {a, b, a^2, b^3, ab, bab}
        
        {a, b, a^2, a^4, ab, bab}
        
        {a, b, a^2, ab, a^3b, bab}
        
        {a, b, a^2, ab, bab, a^2ba}
        
        {a, b, a^2, ab, a^2(b^2), bab}
        
        {a, b, a^2, ab, ab(a^2), bab}
        
        {a, b, a^2, ab, bab, abab}
        
        {a, b, a^2, ab, a(b^2)a, bab}
        
        {a, b, a^2, ab, a(b^3), bab}
        
        {a, b, a^2, ab, b(a^3), bab}
        
        {a, b, a^2, ab, bab, b(a^2)b}
        
        {a, b, a^2, ab, b^2(a^2), bab}
        
        {a, b, a^2, ab, bab, b^2ab}
        
        {a, b, a^2, a^5, ab, bab}
        
        {a, b, a^2, ab, a^4b, bab}
        
        {a, b, a^2, ab, bab, a^2b(a^2)}
        
        {a, b, a^2, ab, bab, a^2bab}
        
        {a, b, a^2, ab, ab(a^3), bab}
        
        {a, b, a^2, ab, bab, ab(a^2)b}
        
        {a, b, a^2, ab, a(b^2)(a^2), bab}
        
        {a, b, a^2, ab, bab, a(b^2)ab}
        
        {a, b, a^2, ab, bab, babab}
        
        {a, b, a^2, ab, bab, b^3ab}
        
        {a, b, a^2, ab, bab, a^3bab}
        
        {a, b, a^2, ab, bab, a^2(b^2)ab}
        
        {a, b, a^2, ab, bab, ababab}
        
        {a, b, a^2, ab, bab, a(b^3)ab}
      - {a, b, a^2, ab, b^2a} (21 descendants)
        
        {a, b, a^2, b^3, ab, b^2a}
        
        {a, b, a^2, a^4, ab, b^2a}
        
        {a, b, a^2, ab, a^3b, b^2a}
        
        {a, b, a^2, ab, b^2a, a^2ba}
        
        {a, b, a^2, ab, a^2(b^2), b^2a}
        
        {a, b, a^2, ab, b^2a, ab(a^2)}
        
        {a, b, a^2, ab, b^2a, abab}
        
        {a, b, a^2, ab, b^2a, a(b^2)a}
        
        {a, b, a^2, ab, a(b^3), b^2a}
        
        {a, b, a^2, ab, b(a^3), b^2a}
        
        {a, b, a^2, ab, b^2a, b(a^2)b}
        
        {a, b, a^2, ab, b^2a, b^2(a^2)}
        
        {a, b, a^2, ab, b^2a, b^2ab}
        
        {a, b, a^2, a^5, ab, b^2a}
        
        {a, b, a^2, ab, a^4b, b^2a}
        
        {a, b, a^2, ab, b^2a, a^2b(a^2)}
        
        {a, b, a^2, ab, b^2a, a^2bab}
        
        {a, b, a^2, ab, b^2a, ab(a^3)}
        
        {a, b, a^2, ab, b^2a, ab(a^2)b}
        
        {a, b, a^2, ab, b^2a, a(b^2)(a^2)}
        
        {a, b, a^2, ab, b^2a, a(b^2)ab}
      - {a, b, a^2, b^3, ab} (21 descendants)
        
        {a, b, a^2, a^4, b^3, ab}
        
        {a, b, a^2, b^3, ab, a^3b}
        
        {a, b, a^2, b^3, ab, a^2ba}
        
        {a, b, a^2, b^3, ab, a^2(b^2)}
        
        {a, b, a^2, b^3, ab, ab(a^2)}
        
        {a, b, a^2, b^3, ab, abab}
        
        {a, b, a^2, b^3, ab, a(b^2)a}
        
        {a, b, a^2, b^3, ab, a(b^3)}
        
        {a, b, a^2, b^3, ab, b(a^3)}
        
        {a, b, a^2, b^3, ab, b(a^2)b}
        
        {a, b, a^2, b^3, ab, b^2(a^2)}
        
        {a, b, a^2, b^3, ab, b^2ab}
        
        {a, b, a^2, a^5, b^3, ab}
        
        {a, b, a^2, b^3, ab, a^4b}
        
        {a, b, a^2, b^3, ab, a^2b(a^2)}
        
        {a, b, a^2, b^3, ab, a^2bab}
        
        {a, b, a^2, b^3, ab, ab(a^3)}
        
        {a, b, a^2, b^3, ab, ab(a^2)b}
        
        {a, b, a^2, b^3, ab, a(b^2)(a^2)}
        
        {a, b, a^2, b^3, ab, a(b^2)ab}
        
        {a, b, a^2, b^3, b^5, ab}
      - {a, b, a^2, a^4, ab} (20 descendants)
        
        {a, b, a^2, a^4, ab, a^3b}
        
        {a, b, a^2, a^4, ab, a^2ba}
        
        {a, b, a^2, a^4, ab, a^2(b^2)}
        
        {a, b, a^2, a^4, ab, ab(a^2)}
        
        {a, b, a^2, a^4, ab, abab}
        
        {a, b, a^2, a^4, ab, a(b^2)a}
        
        {a, b, a^2, a^4, ab, a(b^3)}
        
        {a, b, a^2, a^4, ab, b(a^3)}
        
        {a, b, a^2, a^4, ab, b(a^2)b}
        
        {a, b, a^2, a^4, ab, b^2(a^2)}
        
        {a, b, a^2, a^4, ab, b^2ab}
        
        {a, b, a^2, a^4, a^5, ab}
        
        {a, b, a^2, a^4, ab, a^4b}
        
        {a, b, a^2, a^4, ab, a^2b(a^2)}
        
        {a, b, a^2, a^4, ab, a^2bab}
        
        {a, b, a^2, a^4, ab, ab(a^3)}
        
        {a, b, a^2, a^4, ab, ab(a^2)b}
        
        {a, b, a^2, a^4, ab, a(b^2)(a^2)}
        
        {a, b, a^2, a^4, ab, a(b^2)ab}
        
        {a, b, a^2, a^4, a^7, ab}
      - {a, b, a^2, ab, a^3b} (18 descendants)
        
        {a, b, a^2, ab, a^3b, a^2ba}
        
        {a, b, a^2, ab, a^2(b^2), a^3b}
        
        {a, b, a^2, ab, a^3b, ab(a^2)}
        
        {a, b, a^2, ab, a^3b, abab}
        
        {a, b, a^2, ab, a^3b, a(b^2)a}
        
        {a, b, a^2, ab, a(b^3), a^3b}
        
        {a, b, a^2, ab, b(a^3), a^3b}
        
        {a, b, a^2, ab, a^3b, b(a^2)b}
        
        {a, b, a^2, ab, a^3b, b^2(a^2)}
        
        {a, b, a^2, ab, a^3b, b^2ab}
        
        {a, b, a^2, a^5, ab, a^3b}
        
        {a, b, a^2, ab, a^3b, a^4b}
        
        {a, b, a^2, ab, a^3b, a^2b(a^2)}
        
        {a, b, a^2, ab, a^3b, a^2bab}
        
        {a, b, a^2, ab, a^3b, ab(a^3)}
        
        {a, b, a^2, ab, a^3b, ab(a^2)b}
        
        {a, b, a^2, ab, a^3b, a(b^2)(a^2)}
        
        {a, b, a^2, ab, a^3b, a(b^2)ab}
      - {a, b, a^2, ab, a^2ba} (17 descendants)
        
        {a, b, a^2, ab, a^2(b^2), a^2ba}
        
        {a, b, a^2, ab, ab(a^2), a^2ba}
        
        {a, b, a^2, ab, a^2ba, abab}
        
        {a, b, a^2, ab, a(b^2)a, a^2ba}
        
        {a, b, a^2, ab, a(b^3), a^2ba}
        
        {a, b, a^2, ab, b(a^3), a^2ba}
        
        {a, b, a^2, ab, b(a^2)b, a^2ba}
        
        {a, b, a^2, ab, b^2(a^2), a^2ba}
        
        {a, b, a^2, ab, a^2ba, b^2ab}
        
        {a, b, a^2, a^5, ab, a^2ba}
        
        {a, b, a^2, ab, a^4b, a^2ba}
        
        {a, b, a^2, ab, a^2ba, a^2b(a^2)}
        
        {a, b, a^2, ab, a^2ba, a^2bab}
        
        {a, b, a^2, ab, ab(a^3), a^2ba}
        
        {a, b, a^2, ab, a^2ba, ab(a^2)b}
        
        {a, b, a^2, ab, a(b^2)(a^2), a^2ba}
        
        {a, b, a^2, ab, a^2ba, a(b^2)ab}
      - {a, b, a^2, ab, a^2(b^2)} (16 descendants)
        
        {a, b, a^2, ab, a^2(b^2), ab(a^2)}
        
        {a, b, a^2, ab, a^2(b^2), abab}
        
        {a, b, a^2, ab, a^2(b^2), a(b^2)a}
        
        {a, b, a^2, ab, a(b^3), a^2(b^2)}
        
        {a, b, a^2, ab, b(a^3), a^2(b^2)}
        
        {a, b, a^2, ab, a^2(b^2), b(a^2)b}
        
        {a, b, a^2, ab, a^2(b^2), b^2(a^2)}
        
        {a, b, a^2, ab, a^2(b^2), b^2ab}
        
        {a, b, a^2, a^5, ab, a^2(b^2)}
        
        {a, b, a^2, ab, a^2(b^2), a^4b}
        
        {a, b, a^2, ab, a^2(b^2), a^2b(a^2)}
        
        {a, b, a^2, ab, a^2(b^2), a^2bab}
        
        {a, b, a^2, ab, a^2(b^2), ab(a^3)}
        
        {a, b, a^2, ab, a^2(b^2), ab(a^2)b}
        
        {a, b, a^2, ab, a^2(b^2), a(b^2)(a^2)}
        
        {a, b, a^2, ab, a^2(b^2), a(b^2)ab}
      - {a, b, a^2, ab, ab(a^2)} (16 descendants)
        
        {a, b, a^2, ab, ab(a^2), abab}
        
        {a, b, a^2, ab, ab(a^2), a(b^2)a}
        
        {a, b, a^2, ab, a(b^3), ab(a^2)}
        
        {a, b, a^2, ab, b(a^3), ab(a^2)}
        
        {a, b, a^2, ab, ab(a^2), b(a^2)b}
        
        {a, b, a^2, ab, b^2(a^2), ab(a^2)}
        
        {a, b, a^2, ab, ab(a^2), b^2ab}
        
        {a, b, a^2, a^5, ab, ab(a^2)}
        
        {a, b, a^2, ab, a^4b, ab(a^2)}
        
        {a, b, a^2, ab, ab(a^2), a^2b(a^2)}
        
        {a, b, a^2, ab, ab(a^2), a^2bab}
        
        {a, b, a^2, ab, ab(a^2), ab(a^3)}
        
        {a, b, a^2, ab, ab(a^2), ab(a^2)b}
        
        {a, b, a^2, ab, ab(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, ab, ab(a^2), a(b^2)ab}
        
        {a, b, a^2, ab, ab(a^2), ab(a^2)b(a^2)}
      - {a, b, a^2, ab, abab} (14 descendants)
        
        {a, b, a^2, ab, a(b^2)a, abab}
        
        {a, b, a^2, ab, a(b^3), abab}
        
        {a, b, a^2, ab, b(a^3), abab}
        
        {a, b, a^2, ab, b(a^2)b, abab}
        
        {a, b, a^2, ab, b^2(a^2), abab}
        
        {a, b, a^2, ab, b^2ab, abab}
        
        {a, b, a^2, a^5, ab, abab}
        
        {a, b, a^2, ab, a^4b, abab}
        
        {a, b, a^2, ab, a^2b(a^2), abab}
        
        {a, b, a^2, ab, abab, a^2bab}
        
        {a, b, a^2, ab, ab(a^3), abab}
        
        {a, b, a^2, ab, abab, ab(a^2)b}
        
        {a, b, a^2, ab, a(b^2)(a^2), abab}
        
        {a, b, a^2, ab, abab, a(b^2)ab}
      - {a, b, a^2, ab, a(b^2)a} (13 descendants)
        
        {a, b, a^2, ab, a(b^3), a(b^2)a}
        
        {a, b, a^2, ab, b(a^3), a(b^2)a}
        
        {a, b, a^2, ab, a(b^2)a, b(a^2)b}
        
        {a, b, a^2, ab, b^2(a^2), a(b^2)a}
        
        {a, b, a^2, ab, a(b^2)a, b^2ab}
        
        {a, b, a^2, a^5, ab, a(b^2)a}
        
        {a, b, a^2, ab, a^4b, a(b^2)a}
        
        {a, b, a^2, ab, a(b^2)a, a^2b(a^2)}
        
        {a, b, a^2, ab, a(b^2)a, a^2bab}
        
        {a, b, a^2, ab, ab(a^3), a(b^2)a}
        
        {a, b, a^2, ab, a(b^2)a, ab(a^2)b}
        
        {a, b, a^2, ab, a(b^2)a, a(b^2)(a^2)}
        
        {a, b, a^2, ab, a(b^2)a, a(b^2)ab}
      - {a, b, a^2, ab, a(b^3)} (12 descendants)
        
        {a, b, a^2, ab, a(b^3), b(a^3)}
        
        {a, b, a^2, ab, a(b^3), b(a^2)b}
        
        {a, b, a^2, ab, a(b^3), b^2(a^2)}
        
        {a, b, a^2, ab, a(b^3), b^2ab}
        
        {a, b, a^2, a^5, ab, a(b^3)}
        
        {a, b, a^2, ab, a(b^3), a^4b}
        
        {a, b, a^2, ab, a(b^3), a^2b(a^2)}
        
        {a, b, a^2, ab, a(b^3), a^2bab}
        
        {a, b, a^2, ab, a(b^3), ab(a^3)}
        
        {a, b, a^2, ab, a(b^3), ab(a^2)b}
        
        {a, b, a^2, ab, a(b^3), a(b^2)(a^2)}
        
        {a, b, a^2, ab, a(b^3), a(b^2)ab}
      - {a, b, a^2, ab, b(a^3)} (11 descendants)
        
        {a, b, a^2, ab, b(a^3), b(a^2)b}
        
        {a, b, a^2, ab, b(a^3), b^2(a^2)}
        
        {a, b, a^2, ab, b(a^3), b^2ab}
        
        {a, b, a^2, a^5, ab, b(a^3)}
        
        {a, b, a^2, ab, b(a^3), a^4b}
        
        {a, b, a^2, ab, b(a^3), a^2b(a^2)}
        
        {a, b, a^2, ab, b(a^3), a^2bab}
        
        {a, b, a^2, ab, b(a^3), ab(a^3)}
        
        {a, b, a^2, ab, b(a^3), ab(a^2)b}
        
        {a, b, a^2, ab, b(a^3), a(b^2)(a^2)}
        
        {a, b, a^2, ab, b(a^3), a(b^2)ab}
      - {a, b, a^2, ab, b(a^2)b} (10 descendants)
        
        {a, b, a^2, ab, b^2(a^2), b(a^2)b}
        
        {a, b, a^2, ab, b(a^2)b, b^2ab}
        
        {a, b, a^2, a^5, ab, b(a^2)b}
        
        {a, b, a^2, ab, a^4b, b(a^2)b}
        
        {a, b, a^2, ab, b(a^2)b, a^2b(a^2)}
        
        {a, b, a^2, ab, b(a^2)b, a^2bab}
        
        {a, b, a^2, ab, ab(a^3), b(a^2)b}
        
        {a, b, a^2, ab, b(a^2)b, ab(a^2)b}
        
        {a, b, a^2, ab, a(b^2)(a^2), b(a^2)b}
        
        {a, b, a^2, ab, b(a^2)b, a(b^2)ab}
      - {a, b, a^2, ab, b^2(a^2)} (9 descendants)
        
        {a, b, a^2, ab, b^2(a^2), b^2ab}
        
        {a, b, a^2, a^5, ab, b^2(a^2)}
        
        {a, b, a^2, ab, a^4b, b^2(a^2)}
        
        {a, b, a^2, ab, b^2(a^2), a^2b(a^2)}
        
        {a, b, a^2, ab, b^2(a^2), a^2bab}
        
        {a, b, a^2, ab, b^2(a^2), ab(a^3)}
        
        {a, b, a^2, ab, b^2(a^2), ab(a^2)b}
        
        {a, b, a^2, ab, b^2(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, ab, b^2(a^2), a(b^2)ab}
      - {a, b, a^2, ab, b^2ab} (8 descendants)
        
        {a, b, a^2, a^5, ab, b^2ab}
        
        {a, b, a^2, ab, a^4b, b^2ab}
        
        {a, b, a^2, ab, a^2b(a^2), b^2ab}
        
        {a, b, a^2, ab, b^2ab, a^2bab}
        
        {a, b, a^2, ab, ab(a^3), b^2ab}
        
        {a, b, a^2, ab, b^2ab, ab(a^2)b}
        
        {a, b, a^2, ab, a(b^2)(a^2), b^2ab}
        
        {a, b, a^2, ab, b^2ab, a(b^2)ab}
      - {a, b, a^2, a^5, ab} (7 descendants)
        
        {a, b, a^2, a^5, ab, a^4b}
        
        {a, b, a^2, a^5, ab, a^2b(a^2)}
        
        {a, b, a^2, a^5, ab, a^2bab}
        
        {a, b, a^2, a^5, ab, ab(a^3)}
        
        {a, b, a^2, a^5, ab, ab(a^2)b}
        
        {a, b, a^2, a^5, ab, a(b^2)(a^2)}
        
        {a, b, a^2, a^5, ab, a(b^2)ab}
      - {a, b, a^2, ab, a^4b} (6 descendants)
        
        {a, b, a^2, ab, a^4b, a^2b(a^2)}
        
        {a, b, a^2, ab, a^4b, a^2bab}
        
        {a, b, a^2, ab, a^4b, ab(a^3)}
        
        {a, b, a^2, ab, a^4b, ab(a^2)b}
        
        {a, b, a^2, ab, a^4b, a(b^2)(a^2)}
        
        {a, b, a^2, ab, a^4b, a(b^2)ab}
      - {a, b, a^2, ab, a^2b(a^2)} (5 descendants)
        
        {a, b, a^2, ab, a^2b(a^2), a^2bab}
        
        {a, b, a^2, ab, ab(a^3), a^2b(a^2)}
        
        {a, b, a^2, ab, a^2b(a^2), ab(a^2)b}
        
        {a, b, a^2, ab, a(b^2)(a^2), a^2b(a^2)}
        
        {a, b, a^2, ab, a^2b(a^2), a(b^2)ab}
      - {a, b, a^2, ab, a^2bab} (4 descendants)
        
        {a, b, a^2, ab, ab(a^3), a^2bab}
        
        {a, b, a^2, ab, ab(a^2)b, a^2bab}
        
        {a, b, a^2, ab, a(b^2)(a^2), a^2bab}
        
        {a, b, a^2, ab, a(b^2)ab, a^2bab}
      - {a, b, a^2, ab, ab(a^3)} (3 descendants)
        
        {a, b, a^2, ab, ab(a^3), ab(a^2)b}
        
        {a, b, a^2, ab, ab(a^3), a(b^2)(a^2)}
        
        {a, b, a^2, ab, ab(a^3), a(b^2)ab}
      - {a, b, a^2, ab, ab(a^2)b} (2 descendants)
        
        {a, b, a^2, ab, a(b^2)(a^2), ab(a^2)b}
        
        {a, b, a^2, ab, ab(a^2)b, a(b^2)ab}
      - {a, b, a^2, ab, a(b^2)(a^2)} (1 descendant)
        
        {a, b, a^2, ab, a(b^2)(a^2), a(b^2)ab}
      - {a, b, a^2, ab, a(b^2)ab} (0 descendants)
    - {a, b, a^2, ba} (29 descendants)
      - {a, b, a^2, b^2, ba} (41 descendants)
        
        {a, b, a^2, a^3, b^2, ba}
        
        {a, b, a^2, b^2, ba, a^2b}
        
        {a, b, a^2, b^2, ba, aba}
        
        {a, b, a^2, b^2, a(b^2), ba}
        
        {a, b, a^2, b^2, ba, b(a^2)}
        
        {a, b, a^2, b^2, ba, bab}
        
        {a, b, a^2, b^2, ba, b^2a}
        
        {a, b, a^2, b^2, b^3, ba}
        
        {a, b, a^2, a^4, b^2, ba}
        
        {a, b, a^2, b^2, ba, a^3b}
        
        {a, b, a^2, b^2, ba, a^2ba}
        
        {a, b, a^2, b^2, ba, a^2(b^2)}
        
        {a, b, a^2, b^2, ba, ab(a^2)}
        
        {a, b, a^2, b^2, ba, a(b^2)a}
        
        {a, b, a^2, b^2, a(b^3), ba}
        
        {a, b, a^2, b^2, ba, b(a^3)}
        
        {a, b, a^2, b^2, ba, b(a^2)b}
        
        {a, b, a^2, b^2, ba, baba}
        
        {a, b, a^2, b^2, ba, ba(b^2)}
        
        {a, b, a^2, b^2, ba, b^2(a^2)}
        
        {a, b, a^2, b^2, ba, b^2ab}
        
        {a, b, a^2, b^2, ba, b^3a}
        
        {a, b, a^2, b^2, b^4, ba}
        
        {a, b, a^2, a^5, b^2, ba}
        
        {a, b, a^2, b^2, ba, a^3ba}
        
        {a, b, a^2, b^2, ba, a^3(b^2)}
        
        {a, b, a^2, b^2, ba, a^2b(a^2)}
        
        {a, b, a^2, b^2, ba, a^2(b^2)a}
        
        {a, b, a^2, b^2, ba, a^2(b^3)}
        
        {a, b, a^2, b^2, ba, b(a^4)}
        
        {a, b, a^2, b^2, ba, b(a^2)ba}
        
        {a, b, a^2, b^2, ba, b(a^2)(b^2)}
        
        {a, b, a^2, b^2, ba, bab(a^2)}
        
        {a, b, a^2, b^2, ba, ba(b^2)a}
        
        {a, b, a^2, b^2, ba, ba(b^3)}
        
        {a, b, a^2, b^2, ba, b^2(a^3)}
        
        {a, b, a^2, b^2, ba, b^2aba}
        
        {a, b, a^2, b^2, ba, b^2a(b^2)}
        
        {a, b, a^2, b^2, ba, b^3(a^2)}
        
        {a, b, a^2, b^2, ba, b^4a}
        
        {a, b, a^2, b^2, b^5, ba}
      - {a, b, a^2, a^3, ba} (40 descendants)
        
        {a, b, a^2, a^3, ba, a^2b}
        
        {a, b, a^2, a^3, ba, aba}
        
        {a, b, a^2, a^3, a(b^2), ba}
        
        {a, b, a^2, a^3, ba, b(a^2)}
        
        {a, b, a^2, a^3, ba, bab}
        
        {a, b, a^2, a^3, ba, b^2a}
        
        {a, b, a^2, a^3, b^3, ba}
        
        {a, b, a^2, a^3, a^4, ba}
        
        {a, b, a^2, a^3, ba, a^3b}
        
        {a, b, a^2, a^3, ba, a^2ba}
        
        {a, b, a^2, a^3, ba, a^2(b^2)}
        
        {a, b, a^2, a^3, ba, ab(a^2)}
        
        {a, b, a^2, a^3, ba, a(b^2)a}
        
        {a, b, a^2, a^3, ba, b(a^3)}
        
        {a, b, a^2, a^3, ba, b(a^2)b}
        
        {a, b, a^2, a^3, ba, baba}
        
        {a, b, a^2, a^3, ba, ba(b^2)}
        
        {a, b, a^2, a^3, ba, b^2(a^2)}
        
        {a, b, a^2, a^3, ba, b^3a}
        
        {a, b, a^2, a^3, a^5, ba}
        
        {a, b, a^2, a^3, ba, a^4b}
        
        {a, b, a^2, a^3, ba, a^3ba}
        
        {a, b, a^2, a^3, ba, a^3(b^2)}
        
        {a, b, a^2, a^3, ba, a^2b(a^2)}
        
        {a, b, a^2, a^3, ba, a^2(b^2)a}
        
        {a, b, a^2, a^3, ba, ab(a^3)}
        
        {a, b, a^2, a^3, ba, b(a^4)}
        
        {a, b, a^2, a^3, ba, b(a^2)ba}
        
        {a, b, a^2, a^3, ba, bab(a^2)}
        
        {a, b, a^2, a^3, ba, ba(b^2)a}
        
        {a, b, a^2, a^3, ba, b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, ba}
        
        {a, b, a^2, a^3, ba, a^4ba}
        
        {a, b, a^2, a^3, ba, a^3b(a^2)}
        
        {a, b, a^2, a^3, ba, a^3(b^2)a}
        
        {a, b, a^2, a^3, ba, a^2b(a^3)}
        
        {a, b, a^2, a^3, ba, b(a^5)}
        
        {a, b, a^2, a^3, ba, bab(a^3)}
        
        {a, b, a^2, a^3, a^7, ba}
        
        {a, b, a^2, a^3, ba, a^3b(a^3)}
      - {a, b, a^2, ba, a^2b} (32 descendants)
        
        {a, b, a^2, ba, a^2b, aba}
        
        {a, b, a^2, a(b^2), ba, a^2b}
        
        {a, b, a^2, ba, b(a^2), a^2b}
        
        {a, b, a^2, ba, a^2b, bab}
        
        {a, b, a^2, ba, a^2b, b^2a}
        
        {a, b, a^2, b^3, ba, a^2b}
        
        {a, b, a^2, a^4, ba, a^2b}
        
        {a, b, a^2, ba, a^2b, a^3b}
        
        {a, b, a^2, ba, a^2b, a^2ba}
        
        {a, b, a^2, ba, a^2b, a^2(b^2)}
        
        {a, b, a^2, ba, a^2b, ab(a^2)}
        
        {a, b, a^2, ba, a^2b, a(b^2)a}
        
        {a, b, a^2, ba, b(a^3), a^2b}
        
        {a, b, a^2, ba, a^2b, b(a^2)b}
        
        {a, b, a^2, ba, a^2b, baba}
        
        {a, b, a^2, ba, a^2b, ba(b^2)}
        
        {a, b, a^2, ba, a^2b, b^2(a^2)}
        
        {a, b, a^2, ba, a^2b, b^3a}
        
        {a, b, a^2, a^5, ba, a^2b}
        
        {a, b, a^2, ba, a^2b, a^3ba}
        
        {a, b, a^2, ba, a^2b, a^2b(a^2)}
        
        {a, b, a^2, ba, a^2b, a^2bab}
        
        {a, b, a^2, ba, a^2b, a^2(b^2)a}
        
        {a, b, a^2, ba, a^2b, a^2(b^3)}
        
        {a, b, a^2, ba, b(a^4), a^2b}
        
        {a, b, a^2, ba, a^2b, b(a^2)ba}
        
        {a, b, a^2, ba, a^2b, bab(a^2)}
        
        {a, b, a^2, ba, a^2b, ba(b^2)a}
        
        {a, b, a^2, ba, a^2b, a^2b(a^3)}
        
        {a, b, a^2, ba, a^2b, a^2baba}
        
        {a, b, a^2, ba, a^2b, a^2(b^2)(a^2)}
        
        {a, b, a^2, ba, a^2b, a^2(b^3)a}
      - {a, b, a^2, ba, aba} (31 descendants)
        
        {a, b, a^2, a(b^2), ba, aba}
        
        {a, b, a^2, ba, b(a^2), aba}
        
        {a, b, a^2, ba, aba, bab}
        
        {a, b, a^2, ba, b^2a, aba}
        
        {a, b, a^2, b^3, ba, aba}
        
        {a, b, a^2, a^4, ba, aba}
        
        {a, b, a^2, ba, a^3b, aba}
        
        {a, b, a^2, ba, aba, a^2ba}
        
        {a, b, a^2, ba, a^2(b^2), aba}
        
        {a, b, a^2, ba, aba, ab(a^2)}
        
        {a, b, a^2, ba, aba, a(b^2)a}
        
        {a, b, a^2, ba, b(a^3), aba}
        
        {a, b, a^2, ba, aba, b(a^2)b}
        
        {a, b, a^2, ba, aba, baba}
        
        {a, b, a^2, ba, aba, ba(b^2)}
        
        {a, b, a^2, ba, b^2(a^2), aba}
        
        {a, b, a^2, ba, b^3a, aba}
        
        {a, b, a^2, a^5, ba, aba}
        
        {a, b, a^2, ba, aba, a^3ba}
        
        {a, b, a^2, ba, aba, a^2b(a^2)}
        
        {a, b, a^2, ba, aba, a^2(b^2)a}
        
        {a, b, a^2, ba, aba, ababa}
        
        {a, b, a^2, ba, b(a^4), aba}
        
        {a, b, a^2, ba, aba, b(a^2)ba}
        
        {a, b, a^2, ba, aba, bab(a^2)}
        
        {a, b, a^2, ba, aba, ba(b^2)a}
        
        {a, b, a^2, ba, aba, b^2aba}
        
        {a, b, a^2, ba, aba, a^4ba}
        
        {a, b, a^2, ba, aba, a^2baba}
        
        {a, b, a^2, ba, aba, b(a^3)ba}
        
        {a, b, a^2, ba, aba, bababa}
      - {a, b, a^2, a(b^2), ba} (24 descendants)
        
        {a, b, a^2, a(b^2), ba, b(a^2)}
        
        {a, b, a^2, a(b^2), ba, bab}
        
        {a, b, a^2, a(b^2), ba, b^2a}
        
        {a, b, a^2, b^3, a(b^2), ba}
        
        {a, b, a^2, a^4, a(b^2), ba}
        
        {a, b, a^2, a(b^2), ba, a^3b}
        
        {a, b, a^2, a(b^2), ba, a^2ba}
        
        {a, b, a^2, a(b^2), ba, a^2(b^2)}
        
        {a, b, a^2, a(b^2), ba, ab(a^2)}
        
        {a, b, a^2, a(b^2), ba, a(b^2)a}
        
        {a, b, a^2, a(b^2), ba, b(a^3)}
        
        {a, b, a^2, a(b^2), ba, b(a^2)b}
        
        {a, b, a^2, a(b^2), ba, baba}
        
        {a, b, a^2, a(b^2), ba, ba(b^2)}
        
        {a, b, a^2, a(b^2), ba, b^2(a^2)}
        
        {a, b, a^2, a(b^2), ba, b^3a}
        
        {a, b, a^2, a^5, a(b^2), ba}
        
        {a, b, a^2, a(b^2), ba, a^3ba}
        
        {a, b, a^2, a(b^2), ba, a^2b(a^2)}
        
        {a, b, a^2, a(b^2), ba, a^2(b^2)a}
        
        {a, b, a^2, a(b^2), ba, b(a^4)}
        
        {a, b, a^2, a(b^2), ba, b(a^2)ba}
        
        {a, b, a^2, a(b^2), ba, bab(a^2)}
        
        {a, b, a^2, a(b^2), ba, ba(b^2)a}
      - {a, b, a^2, ba, b(a^2)} (36 descendants)
        
        {a, b, a^2, ba, b(a^2), bab}
        
        {a, b, a^2, ba, b(a^2), b^2a}
        
        {a, b, a^2, b^3, ba, b(a^2)}
        
        {a, b, a^2, a^4, ba, b(a^2)}
        
        {a, b, a^2, ba, b(a^2), a^3b}
        
        {a, b, a^2, ba, b(a^2), a^2ba}
        
        {a, b, a^2, ba, b(a^2), a^2(b^2)}
        
        {a, b, a^2, ba, b(a^2), ab(a^2)}
        
        {a, b, a^2, ba, b(a^2), a(b^2)a}
        
        {a, b, a^2, ba, b(a^2), b(a^3)}
        
        {a, b, a^2, ba, b(a^2), b(a^2)b}
        
        {a, b, a^2, ba, b(a^2), baba}
        
        {a, b, a^2, ba, b(a^2), ba(b^2)}
        
        {a, b, a^2, ba, b(a^2), b^2(a^2)}
        
        {a, b, a^2, ba, b(a^2), b^3a}
        
        {a, b, a^2, a^5, ba, b(a^2)}
        
        {a, b, a^2, ba, b(a^2), a^3ba}
        
        {a, b, a^2, ba, b(a^2), a^2b(a^2)}
        
        {a, b, a^2, ba, b(a^2), a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, ba, b(a^2), b(a^4)}
        
        {a, b, a^2, ba, b(a^2), b(a^3)b}
        
        {a, b, a^2, ba, b(a^2), b(a^2)ba}
        
        {a, b, a^2, ba, b(a^2), b(a^2)(b^2)}
        
        {a, b, a^2, ba, b(a^2), bab(a^2)}
        
        {a, b, a^2, ba, b(a^2), ba(b^2)a}
        
        {a, b, a^2, ba, b(a^2), b^3(a^2)}
        
        {a, b, a^2, ba, b(a^2), a^3b(a^2)}
        
        {a, b, a^2, ba, b(a^2), a^2(b^2)(a^2)}
        
        {a, b, a^2, ba, b(a^2), b(a^5)}
        
        {a, b, a^2, ba, b(a^2), b(a^3)ba}
        
        {a, b, a^2, ba, b(a^2), b(a^2)b(a^2)}
        
        {a, b, a^2, ba, b(a^2), b(a^2)(b^2)a}
        
        {a, b, a^2, ba, b(a^2), ba(b^2)(a^2)}
        
        {a, b, a^2, ba, b(a^2), b(a^3)b(a^2)}
        
        {a, b, a^2, ba, b(a^2), b(a^2)(b^2)(a^2)}
      - {a, b, a^2, ba, bab} (28 descendants)
        
        {a, b, a^2, ba, b^2a, bab}
        
        {a, b, a^2, b^3, ba, bab}
        
        {a, b, a^2, a^4, ba, bab}
        
        {a, b, a^2, ba, a^3b, bab}
        
        {a, b, a^2, ba, bab, a^2ba}
        
        {a, b, a^2, ba, a^2(b^2), bab}
        
        {a, b, a^2, ba, ab(a^2), bab}
        
        {a, b, a^2, ba, a(b^2)a, bab}
        
        {a, b, a^2, ba, b(a^3), bab}
        
        {a, b, a^2, ba, bab, b(a^2)b}
        
        {a, b, a^2, ba, bab, baba}
        
        {a, b, a^2, ba, bab, ba(b^2)}
        
        {a, b, a^2, ba, b^2(a^2), bab}
        
        {a, b, a^2, ba, b^3a, bab}
        
        {a, b, a^2, a^5, ba, bab}
        
        {a, b, a^2, ba, bab, a^3ba}
        
        {a, b, a^2, ba, bab, a^2b(a^2)}
        
        {a, b, a^2, ba, bab, a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^4), bab}
        
        {a, b, a^2, ba, bab, b(a^2)ba}
        
        {a, b, a^2, ba, bab, bab(a^2)}
        
        {a, b, a^2, ba, bab, babab}
        
        {a, b, a^2, ba, bab, ba(b^2)a}
        
        {a, b, a^2, ba, bab, ba(b^3)}
        
        {a, b, a^2, ba, bab, bab(a^3)}
        
        {a, b, a^2, ba, bab, bababa}
        
        {a, b, a^2, ba, bab, ba(b^2)(a^2)}
        
        {a, b, a^2, ba, bab, ba(b^3)a}
      - {a, b, a^2, ba, b^2a} (27 descendants)
        
        {a, b, a^2, b^3, ba, b^2a}
        
        {a, b, a^2, a^4, ba, b^2a}
        
        {a, b, a^2, ba, a^3b, b^2a}
        
        {a, b, a^2, ba, b^2a, a^2ba}
        
        {a, b, a^2, ba, a^2(b^2), b^2a}
        
        {a, b, a^2, ba, b^2a, ab(a^2)}
        
        {a, b, a^2, ba, b^2a, a(b^2)a}
        
        {a, b, a^2, ba, b(a^3), b^2a}
        
        {a, b, a^2, ba, b^2a, b(a^2)b}
        
        {a, b, a^2, ba, b^2a, baba}
        
        {a, b, a^2, ba, b^2a, ba(b^2)}
        
        {a, b, a^2, ba, b^2a, b^2(a^2)}
        
        {a, b, a^2, ba, b^2a, b^3a}
        
        {a, b, a^2, a^5, ba, b^2a}
        
        {a, b, a^2, ba, b^2a, a^3ba}
        
        {a, b, a^2, ba, b^2a, a^2b(a^2)}
        
        {a, b, a^2, ba, b^2a, a^2(b^2)a}
        
        {a, b, a^2, ba, b^2a, a(b^3)a}
        
        {a, b, a^2, ba, b(a^4), b^2a}
        
        {a, b, a^2, ba, b^2a, b(a^2)ba}
        
        {a, b, a^2, ba, b^2a, bab(a^2)}
        
        {a, b, a^2, ba, b^2a, ba(b^2)a}
        
        {a, b, a^2, ba, b^2a, b^4a}
        
        {a, b, a^2, ba, b^2a, a^3(b^2)a}
        
        {a, b, a^2, ba, b^2a, a^2(b^3)a}
        
        {a, b, a^2, ba, b^2a, b(a^2)(b^2)a}
        
        {a, b, a^2, ba, b^2a, ba(b^3)a}
      - {a, b, a^2, b^3, ba} (21 descendants)
        
        {a, b, a^2, a^4, b^3, ba}
        
        {a, b, a^2, b^3, ba, a^3b}
        
        {a, b, a^2, b^3, ba, a^2ba}
        
        {a, b, a^2, b^3, ba, a^2(b^2)}
        
        {a, b, a^2, b^3, ba, ab(a^2)}
        
        {a, b, a^2, b^3, ba, a(b^2)a}
        
        {a, b, a^2, b^3, ba, b(a^3)}
        
        {a, b, a^2, b^3, ba, b(a^2)b}
        
        {a, b, a^2, b^3, ba, baba}
        
        {a, b, a^2, b^3, ba, ba(b^2)}
        
        {a, b, a^2, b^3, ba, b^2(a^2)}
        
        {a, b, a^2, b^3, ba, b^3a}
        
        {a, b, a^2, a^5, b^3, ba}
        
        {a, b, a^2, b^3, ba, a^3ba}
        
        {a, b, a^2, b^3, ba, a^2b(a^2)}
        
        {a, b, a^2, b^3, ba, a^2(b^2)a}
        
        {a, b, a^2, b^3, ba, b(a^4)}
        
        {a, b, a^2, b^3, ba, b(a^2)ba}
        
        {a, b, a^2, b^3, ba, bab(a^2)}
        
        {a, b, a^2, b^3, ba, ba(b^2)a}
        
        {a, b, a^2, b^3, b^5, ba}
      - {a, b, a^2, a^4, ba} (20 descendants)
        
        {a, b, a^2, a^4, ba, a^3b}
        
        {a, b, a^2, a^4, ba, a^2ba}
        
        {a, b, a^2, a^4, ba, a^2(b^2)}
        
        {a, b, a^2, a^4, ba, ab(a^2)}
        
        {a, b, a^2, a^4, ba, a(b^2)a}
        
        {a, b, a^2, a^4, ba, b(a^3)}
        
        {a, b, a^2, a^4, ba, b(a^2)b}
        
        {a, b, a^2, a^4, ba, baba}
        
        {a, b, a^2, a^4, ba, ba(b^2)}
        
        {a, b, a^2, a^4, ba, b^2(a^2)}
        
        {a, b, a^2, a^4, ba, b^3a}
        
        {a, b, a^2, a^4, a^5, ba}
        
        {a, b, a^2, a^4, ba, a^3ba}
        
        {a, b, a^2, a^4, ba, a^2b(a^2)}
        
        {a, b, a^2, a^4, ba, a^2(b^2)a}
        
        {a, b, a^2, a^4, ba, b(a^4)}
        
        {a, b, a^2, a^4, ba, b(a^2)ba}
        
        {a, b, a^2, a^4, ba, bab(a^2)}
        
        {a, b, a^2, a^4, ba, ba(b^2)a}
        
        {a, b, a^2, a^4, a^7, ba}
      - {a, b, a^2, ba, a^3b} (18 descendants)
        
        {a, b, a^2, ba, a^3b, a^2ba}
        
        {a, b, a^2, ba, a^2(b^2), a^3b}
        
        {a, b, a^2, ba, a^3b, ab(a^2)}
        
        {a, b, a^2, ba, a^3b, a(b^2)a}
        
        {a, b, a^2, ba, b(a^3), a^3b}
        
        {a, b, a^2, ba, a^3b, b(a^2)b}
        
        {a, b, a^2, ba, a^3b, baba}
        
        {a, b, a^2, ba, a^3b, ba(b^2)}
        
        {a, b, a^2, ba, a^3b, b^2(a^2)}
        
        {a, b, a^2, ba, a^3b, b^3a}
        
        {a, b, a^2, a^5, ba, a^3b}
        
        {a, b, a^2, ba, a^3b, a^3ba}
        
        {a, b, a^2, ba, a^3b, a^2b(a^2)}
        
        {a, b, a^2, ba, a^3b, a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^4), a^3b}
        
        {a, b, a^2, ba, a^3b, b(a^2)ba}
        
        {a, b, a^2, ba, a^3b, bab(a^2)}
        
        {a, b, a^2, ba, a^3b, ba(b^2)a}
      - {a, b, a^2, ba, a^2ba} (18 descendants)
        
        {a, b, a^2, ba, a^2(b^2), a^2ba}
        
        {a, b, a^2, ba, ab(a^2), a^2ba}
        
        {a, b, a^2, ba, a(b^2)a, a^2ba}
        
        {a, b, a^2, ba, b(a^3), a^2ba}
        
        {a, b, a^2, ba, b(a^2)b, a^2ba}
        
        {a, b, a^2, ba, a^2ba, baba}
        
        {a, b, a^2, ba, ba(b^2), a^2ba}
        
        {a, b, a^2, ba, b^2(a^2), a^2ba}
        
        {a, b, a^2, ba, b^3a, a^2ba}
        
        {a, b, a^2, a^5, ba, a^2ba}
        
        {a, b, a^2, ba, a^2ba, a^3ba}
        
        {a, b, a^2, ba, a^2ba, a^2b(a^2)}
        
        {a, b, a^2, ba, a^2ba, a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^4), a^2ba}
        
        {a, b, a^2, ba, a^2ba, b(a^2)ba}
        
        {a, b, a^2, ba, a^2ba, bab(a^2)}
        
        {a, b, a^2, ba, a^2ba, ba(b^2)a}
        
        {a, b, a^2, ba, a^2ba, a^2b(a^2)ba}
      - {a, b, a^2, ba, a^2(b^2)} (16 descendants)
        
        {a, b, a^2, ba, a^2(b^2), ab(a^2)}
        
        {a, b, a^2, ba, a^2(b^2), a(b^2)a}
        
        {a, b, a^2, ba, b(a^3), a^2(b^2)}
        
        {a, b, a^2, ba, a^2(b^2), b(a^2)b}
        
        {a, b, a^2, ba, a^2(b^2), baba}
        
        {a, b, a^2, ba, a^2(b^2), ba(b^2)}
        
        {a, b, a^2, ba, a^2(b^2), b^2(a^2)}
        
        {a, b, a^2, ba, a^2(b^2), b^3a}
        
        {a, b, a^2, a^5, ba, a^2(b^2)}
        
        {a, b, a^2, ba, a^2(b^2), a^3ba}
        
        {a, b, a^2, ba, a^2(b^2), a^2b(a^2)}
        
        {a, b, a^2, ba, a^2(b^2), a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^4), a^2(b^2)}
        
        {a, b, a^2, ba, a^2(b^2), b(a^2)ba}
        
        {a, b, a^2, ba, a^2(b^2), bab(a^2)}
        
        {a, b, a^2, ba, a^2(b^2), ba(b^2)a}
      - {a, b, a^2, ba, ab(a^2)} (15 descendants)
        
        {a, b, a^2, ba, ab(a^2), a(b^2)a}
        
        {a, b, a^2, ba, b(a^3), ab(a^2)}
        
        {a, b, a^2, ba, ab(a^2), b(a^2)b}
        
        {a, b, a^2, ba, ab(a^2), baba}
        
        {a, b, a^2, ba, ab(a^2), ba(b^2)}
        
        {a, b, a^2, ba, b^2(a^2), ab(a^2)}
        
        {a, b, a^2, ba, b^3a, ab(a^2)}
        
        {a, b, a^2, a^5, ba, ab(a^2)}
        
        {a, b, a^2, ba, ab(a^2), a^3ba}
        
        {a, b, a^2, ba, ab(a^2), a^2b(a^2)}
        
        {a, b, a^2, ba, ab(a^2), a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^4), ab(a^2)}
        
        {a, b, a^2, ba, ab(a^2), b(a^2)ba}
        
        {a, b, a^2, ba, ab(a^2), bab(a^2)}
        
        {a, b, a^2, ba, ab(a^2), ba(b^2)a}
      - {a, b, a^2, ba, a(b^2)a} (14 descendants)
        
        {a, b, a^2, ba, b(a^3), a(b^2)a}
        
        {a, b, a^2, ba, a(b^2)a, b(a^2)b}
        
        {a, b, a^2, ba, a(b^2)a, baba}
        
        {a, b, a^2, ba, a(b^2)a, ba(b^2)}
        
        {a, b, a^2, ba, b^2(a^2), a(b^2)a}
        
        {a, b, a^2, ba, b^3a, a(b^2)a}
        
        {a, b, a^2, a^5, ba, a(b^2)a}
        
        {a, b, a^2, ba, a(b^2)a, a^3ba}
        
        {a, b, a^2, ba, a(b^2)a, a^2b(a^2)}
        
        {a, b, a^2, ba, a(b^2)a, a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^4), a(b^2)a}
        
        {a, b, a^2, ba, a(b^2)a, b(a^2)ba}
        
        {a, b, a^2, ba, a(b^2)a, bab(a^2)}
        
        {a, b, a^2, ba, a(b^2)a, ba(b^2)a}
      - {a, b, a^2, ba, b(a^3)} (13 descendants)
        
        {a, b, a^2, ba, b(a^3), b(a^2)b}
        
        {a, b, a^2, ba, b(a^3), baba}
        
        {a, b, a^2, ba, b(a^3), ba(b^2)}
        
        {a, b, a^2, ba, b(a^3), b^2(a^2)}
        
        {a, b, a^2, ba, b(a^3), b^3a}
        
        {a, b, a^2, a^5, ba, b(a^3)}
        
        {a, b, a^2, ba, b(a^3), a^3ba}
        
        {a, b, a^2, ba, b(a^3), a^2b(a^2)}
        
        {a, b, a^2, ba, b(a^3), a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^3), b(a^4)}
        
        {a, b, a^2, ba, b(a^3), b(a^2)ba}
        
        {a, b, a^2, ba, b(a^3), bab(a^2)}
        
        {a, b, a^2, ba, b(a^3), ba(b^2)a}
      - {a, b, a^2, ba, b(a^2)b} (12 descendants)
        
        {a, b, a^2, ba, b(a^2)b, baba}
        
        {a, b, a^2, ba, ba(b^2), b(a^2)b}
        
        {a, b, a^2, ba, b^2(a^2), b(a^2)b}
        
        {a, b, a^2, ba, b^3a, b(a^2)b}
        
        {a, b, a^2, a^5, ba, b(a^2)b}
        
        {a, b, a^2, ba, b(a^2)b, a^3ba}
        
        {a, b, a^2, ba, b(a^2)b, a^2b(a^2)}
        
        {a, b, a^2, ba, b(a^2)b, a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^4), b(a^2)b}
        
        {a, b, a^2, ba, b(a^2)b, b(a^2)ba}
        
        {a, b, a^2, ba, b(a^2)b, bab(a^2)}
        
        {a, b, a^2, ba, b(a^2)b, ba(b^2)a}
      - {a, b, a^2, ba, baba} (11 descendants)
        
        {a, b, a^2, ba, ba(b^2), baba}
        
        {a, b, a^2, ba, b^2(a^2), baba}
        
        {a, b, a^2, ba, b^3a, baba}
        
        {a, b, a^2, a^5, ba, baba}
        
        {a, b, a^2, ba, a^3ba, baba}
        
        {a, b, a^2, ba, a^2b(a^2), baba}
        
        {a, b, a^2, ba, a^2(b^2)a, baba}
        
        {a, b, a^2, ba, b(a^4), baba}
        
        {a, b, a^2, ba, baba, b(a^2)ba}
        
        {a, b, a^2, ba, baba, bab(a^2)}
        
        {a, b, a^2, ba, baba, ba(b^2)a}
      - {a, b, a^2, ba, ba(b^2)} (10 descendants)
        
        {a, b, a^2, ba, b^2(a^2), ba(b^2)}
        
        {a, b, a^2, ba, b^3a, ba(b^2)}
        
        {a, b, a^2, a^5, ba, ba(b^2)}
        
        {a, b, a^2, ba, ba(b^2), a^3ba}
        
        {a, b, a^2, ba, ba(b^2), a^2b(a^2)}
        
        {a, b, a^2, ba, ba(b^2), a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^4), ba(b^2)}
        
        {a, b, a^2, ba, ba(b^2), b(a^2)ba}
        
        {a, b, a^2, ba, ba(b^2), bab(a^2)}
        
        {a, b, a^2, ba, ba(b^2), ba(b^2)a}
      - {a, b, a^2, ba, b^2(a^2)} (9 descendants)
        
        {a, b, a^2, ba, b^2(a^2), b^3a}
        
        {a, b, a^2, a^5, ba, b^2(a^2)}
        
        {a, b, a^2, ba, b^2(a^2), a^3ba}
        
        {a, b, a^2, ba, b^2(a^2), a^2b(a^2)}
        
        {a, b, a^2, ba, b^2(a^2), a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^4), b^2(a^2)}
        
        {a, b, a^2, ba, b^2(a^2), b(a^2)ba}
        
        {a, b, a^2, ba, b^2(a^2), bab(a^2)}
        
        {a, b, a^2, ba, b^2(a^2), ba(b^2)a}
      - {a, b, a^2, ba, b^3a} (8 descendants)
        
        {a, b, a^2, a^5, ba, b^3a}
        
        {a, b, a^2, ba, b^3a, a^3ba}
        
        {a, b, a^2, ba, b^3a, a^2b(a^2)}
        
        {a, b, a^2, ba, b^3a, a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^4), b^3a}
        
        {a, b, a^2, ba, b^3a, b(a^2)ba}
        
        {a, b, a^2, ba, b^3a, bab(a^2)}
        
        {a, b, a^2, ba, b^3a, ba(b^2)a}
      - {a, b, a^2, a^5, ba} (7 descendants)
        
        {a, b, a^2, a^5, ba, a^3ba}
        
        {a, b, a^2, a^5, ba, a^2b(a^2)}
        
        {a, b, a^2, a^5, ba, a^2(b^2)a}
        
        {a, b, a^2, a^5, ba, b(a^4)}
        
        {a, b, a^2, a^5, ba, b(a^2)ba}
        
        {a, b, a^2, a^5, ba, bab(a^2)}
        
        {a, b, a^2, a^5, ba, ba(b^2)a}
      - {a, b, a^2, ba, a^3ba} (6 descendants)
        
        {a, b, a^2, ba, a^2b(a^2), a^3ba}
        
        {a, b, a^2, ba, a^2(b^2)a, a^3ba}
        
        {a, b, a^2, ba, b(a^4), a^3ba}
        
        {a, b, a^2, ba, a^3ba, b(a^2)ba}
        
        {a, b, a^2, ba, a^3ba, bab(a^2)}
        
        {a, b, a^2, ba, a^3ba, ba(b^2)a}
      - {a, b, a^2, ba, a^2b(a^2)} (5 descendants)
        
        {a, b, a^2, ba, a^2b(a^2), a^2(b^2)a}
        
        {a, b, a^2, ba, b(a^4), a^2b(a^2)}
        
        {a, b, a^2, ba, a^2b(a^2), b(a^2)ba}
        
        {a, b, a^2, ba, a^2b(a^2), bab(a^2)}
        
        {a, b, a^2, ba, a^2b(a^2), ba(b^2)a}
      - {a, b, a^2, ba, a^2(b^2)a} (4 descendants)
        
        {a, b, a^2, ba, b(a^4), a^2(b^2)a}
        
        {a, b, a^2, ba, a^2(b^2)a, b(a^2)ba}
        
        {a, b, a^2, ba, a^2(b^2)a, bab(a^2)}
        
        {a, b, a^2, ba, a^2(b^2)a, ba(b^2)a}
      - {a, b, a^2, ba, b(a^4)} (3 descendants)
        
        {a, b, a^2, ba, b(a^4), b(a^2)ba}
        
        {a, b, a^2, ba, b(a^4), bab(a^2)}
        
        {a, b, a^2, ba, b(a^4), ba(b^2)a}
      - {a, b, a^2, ba, b(a^2)ba} (2 descendants)
        
        {a, b, a^2, ba, bab(a^2), b(a^2)ba}
        
        {a, b, a^2, ba, ba(b^2)a, b(a^2)ba}
      - {a, b, a^2, ba, bab(a^2)} (1 descendant)
        
        {a, b, a^2, ba, bab(a^2), ba(b^2)a}
      - {a, b, a^2, ba, ba(b^2)a} (0 descendants)
    - {a, b, a^2, b^2} (28 descendants)
      - {a, b, a^2, a^3, b^2} (40 descendants)
        
        {a, b, a^2, a^3, b^2, a^2b}
        
        {a, b, a^2, a^3, b^2, aba}
        
        {a, b, a^2, a^3, b^2, a(b^2)}
        
        {a, b, a^2, a^3, b^2, b(a^2)}
        
        {a, b, a^2, a^3, b^2, bab}
        
        {a, b, a^2, a^3, b^2, b^2a}
        
        {a, b, a^2, a^3, b^2, b^3}
        
        {a, b, a^2, a^3, a^4, b^2}
        
        {a, b, a^2, a^3, b^2, a^3b}
        
        {a, b, a^2, a^3, b^2, a^2ba}
        
        {a, b, a^2, a^3, b^2, a^2(b^2)}
        
        {a, b, a^2, a^3, b^2, ab(a^2)}
        
        {a, b, a^2, a^3, b^2, a(b^3)}
        
        {a, b, a^2, a^3, b^2, b(a^3)}
        
        {a, b, a^2, a^3, b^2, ba(b^2)}
        
        {a, b, a^2, a^3, b^2, b^2(a^2)}
        
        {a, b, a^2, a^3, b^2, b^2ab}
        
        {a, b, a^2, a^3, b^2, b^3a}
        
        {a, b, a^2, a^3, b^2, b^4}
        
        {a, b, a^2, a^3, a^5, b^2}
        
        {a, b, a^2, a^3, b^2, a^4b}
        
        {a, b, a^2, a^3, b^2, a^3ba}
        
        {a, b, a^2, a^3, b^2, a^3(b^2)}
        
        {a, b, a^2, a^3, b^2, a^2b(a^2)}
        
        {a, b, a^2, a^3, b^2, a^2(b^3)}
        
        {a, b, a^2, a^3, b^2, ab(a^3)}
        
        {a, b, a^2, a^3, b^2, b(a^4)}
        
        {a, b, a^2, a^3, b^2, b^2(a^3)}
        
        {a, b, a^2, a^3, b^2, b^2a(b^2)}
        
        {a, b, a^2, a^3, b^2, b^3(a^2)}
        
        {a, b, a^2, a^3, b^2, b^5}
        
        {a, b, a^2, a^3, a^6, b^2}
        
        {a, b, a^2, a^3, b^2, a^4(b^2)}
        
        {a, b, a^2, a^3, b^2, a^3b(a^2)}
        
        {a, b, a^2, a^3, b^2, a^3(b^3)}
        
        {a, b, a^2, a^3, b^2, a^2b(a^3)}
        
        {a, b, a^2, a^3, b^2, b^2(a^4)}
        
        {a, b, a^2, a^3, b^2, b^3(a^3)}
        
        {a, b, a^2, a^3, a^7, b^2}
        
        {a, b, a^2, a^3, b^2, a^3b(a^3)}
      - {a, b, a^2, b^2, a^2b} (32 descendants)
        
        {a, b, a^2, b^2, a^2b, aba}
        
        {a, b, a^2, b^2, a(b^2), a^2b}
        
        {a, b, a^2, b^2, b(a^2), a^2b}
        
        {a, b, a^2, b^2, a^2b, bab}
        
        {a, b, a^2, b^2, a^2b, b^2a}
        
        {a, b, a^2, b^2, b^3, a^2b}
        
        {a, b, a^2, a^4, b^2, a^2b}
        
        {a, b, a^2, b^2, a^2b, a^3b}
        
        {a, b, a^2, b^2, a^2b, a^2ba}
        
        {a, b, a^2, b^2, a^2b, a^2(b^2)}
        
        {a, b, a^2, b^2, a^2b, ab(a^2)}
        
        {a, b, a^2, b^2, a(b^3), a^2b}
        
        {a, b, a^2, b^2, b(a^3), a^2b}
        
        {a, b, a^2, b^2, a^2b, ba(b^2)}
        
        {a, b, a^2, b^2, a^2b, b^2(a^2)}
        
        {a, b, a^2, b^2, a^2b, b^2ab}
        
        {a, b, a^2, b^2, a^2b, b^3a}
        
        {a, b, a^2, b^2, b^4, a^2b}
        
        {a, b, a^2, a^5, b^2, a^2b}
        
        {a, b, a^2, b^2, a^2b, a^3(b^2)}
        
        {a, b, a^2, b^2, a^2b, a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2b, a^2bab}
        
        {a, b, a^2, b^2, a^2b, a^2(b^2)a}
        
        {a, b, a^2, b^2, a^2b, a^2(b^3)}
        
        {a, b, a^2, b^2, a^2b, b^2(a^3)}
        
        {a, b, a^2, b^2, a^2b, b^2a(b^2)}
        
        {a, b, a^2, b^2, a^2b, b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, a^2b}
        
        {a, b, a^2, b^2, a^2b, a^2b(a^3)}
        
        {a, b, a^2, b^2, a^2b, a^2ba(b^2)}
        
        {a, b, a^2, b^2, a^2b, a^2(b^2)(a^2)}
        
        {a, b, a^2, b^2, a^2b, a^2(b^4)}
      - {a, b, a^2, b^2, aba} (26 descendants)
        
        {a, b, a^2, b^2, a(b^2), aba}
        
        {a, b, a^2, b^2, b(a^2), aba}
        
        {a, b, a^2, b^2, aba, bab}
        
        {a, b, a^2, b^2, b^2a, aba}
        
        {a, b, a^2, b^2, b^3, aba}
        
        {a, b, a^2, a^4, b^2, aba}
        
        {a, b, a^2, b^2, a^3b, aba}
        
        {a, b, a^2, b^2, aba, a^2ba}
        
        {a, b, a^2, b^2, a^2(b^2), aba}
        
        {a, b, a^2, b^2, aba, ab(a^2)}
        
        {a, b, a^2, b^2, a(b^3), aba}
        
        {a, b, a^2, b^2, b(a^3), aba}
        
        {a, b, a^2, b^2, aba, ba(b^2)}
        
        {a, b, a^2, b^2, b^2(a^2), aba}
        
        {a, b, a^2, b^2, aba, b^2ab}
        
        {a, b, a^2, b^2, b^3a, aba}
        
        {a, b, a^2, b^2, b^4, aba}
        
        {a, b, a^2, a^5, b^2, aba}
        
        {a, b, a^2, b^2, a^3(b^2), aba}
        
        {a, b, a^2, b^2, aba, a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2(b^3), aba}
        
        {a, b, a^2, b^2, aba, ababa}
        
        {a, b, a^2, b^2, b^2(a^3), aba}
        
        {a, b, a^2, b^2, aba, b^2a(b^2)}
        
        {a, b, a^2, b^2, b^3(a^2), aba}
        
        {a, b, a^2, b^2, b^5, aba}
      - {a, b, a^2, b^2, a(b^2)} (30 descendants)
        
        {a, b, a^2, b^2, a(b^2), b(a^2)}
        
        {a, b, a^2, b^2, a(b^2), bab}
        
        {a, b, a^2, b^2, a(b^2), b^2a}
        
        {a, b, a^2, b^2, b^3, a(b^2)}
        
        {a, b, a^2, a^4, b^2, a(b^2)}
        
        {a, b, a^2, b^2, a(b^2), a^3b}
        
        {a, b, a^2, b^2, a(b^2), a^2ba}
        
        {a, b, a^2, b^2, a(b^2), a^2(b^2)}
        
        {a, b, a^2, b^2, a(b^2), ab(a^2)}
        
        {a, b, a^2, b^2, a(b^2), a(b^3)}
        
        {a, b, a^2, b^2, a(b^2), b(a^3)}
        
        {a, b, a^2, b^2, a(b^2), ba(b^2)}
        
        {a, b, a^2, b^2, a(b^2), b^2(a^2)}
        
        {a, b, a^2, b^2, a(b^2), b^2ab}
        
        {a, b, a^2, b^2, a(b^2), b^3a}
        
        {a, b, a^2, b^2, b^4, a(b^2)}
        
        {a, b, a^2, a^5, b^2, a(b^2)}
        
        {a, b, a^2, b^2, a(b^2), a^3(b^2)}
        
        {a, b, a^2, b^2, a(b^2), a^2b(a^2)}
        
        {a, b, a^2, b^2, a(b^2), a^2(b^3)}
        
        {a, b, a^2, b^2, a(b^2), aba(b^2)}
        
        {a, b, a^2, b^2, a(b^2), b(a^2)(b^2)}
        
        {a, b, a^2, b^2, a(b^2), b^2(a^3)}
        
        {a, b, a^2, b^2, a(b^2), b^2a(b^2)}
        
        {a, b, a^2, b^2, a(b^2), b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, a(b^2)}
        
        {a, b, a^2, b^2, a(b^2), a^4(b^2)}
        
        {a, b, a^2, b^2, a(b^2), a^2ba(b^2)}
        
        {a, b, a^2, b^2, a(b^2), b^2(a^2)(b^2)}
        
        {a, b, a^2, b^2, a(b^2), b^3a(b^2)}
      - {a, b, a^2, b^2, b(a^2)} (29 descendants)
        
        {a, b, a^2, b^2, b(a^2), bab}
        
        {a, b, a^2, b^2, b(a^2), b^2a}
        
        {a, b, a^2, b^2, b^3, b(a^2)}
        
        {a, b, a^2, a^4, b^2, b(a^2)}
        
        {a, b, a^2, b^2, b(a^2), a^3b}
        
        {a, b, a^2, b^2, b(a^2), a^2ba}
        
        {a, b, a^2, b^2, b(a^2), a^2(b^2)}
        
        {a, b, a^2, b^2, b(a^2), ab(a^2)}
        
        {a, b, a^2, b^2, a(b^3), b(a^2)}
        
        {a, b, a^2, b^2, b(a^2), b(a^3)}
        
        {a, b, a^2, b^2, b(a^2), ba(b^2)}
        
        {a, b, a^2, b^2, b(a^2), b^2(a^2)}
        
        {a, b, a^2, b^2, b(a^2), b^2ab}
        
        {a, b, a^2, b^2, b(a^2), b^3a}
        
        {a, b, a^2, b^2, b^4, b(a^2)}
        
        {a, b, a^2, a^5, b^2, b(a^2)}
        
        {a, b, a^2, b^2, b(a^2), a^3(b^2)}
        
        {a, b, a^2, b^2, b(a^2), a^2b(a^2)}
        
        {a, b, a^2, b^2, b(a^2), a^2(b^3)}
        
        {a, b, a^2, b^2, b(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, b^2, b(a^2), bab(a^2)}
        
        {a, b, a^2, b^2, b(a^2), b^2(a^3)}
        
        {a, b, a^2, b^2, b(a^2), b^2a(b^2)}
        
        {a, b, a^2, b^2, b(a^2), b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, b(a^2)}
        
        {a, b, a^2, b^2, b(a^2), a^3b(a^2)}
        
        {a, b, a^2, b^2, b(a^2), a^2(b^2)(a^2)}
        
        {a, b, a^2, b^2, b(a^2), b^2ab(a^2)}
        
        {a, b, a^2, b^2, b(a^2), b^4(a^2)}
      - {a, b, a^2, b^2, bab} (23 descendants)
        
        {a, b, a^2, b^2, b^2a, bab}
        
        {a, b, a^2, b^2, b^3, bab}
        
        {a, b, a^2, a^4, b^2, bab}
        
        {a, b, a^2, b^2, a^3b, bab}
        
        {a, b, a^2, b^2, bab, a^2ba}
        
        {a, b, a^2, b^2, a^2(b^2), bab}
        
        {a, b, a^2, b^2, ab(a^2), bab}
        
        {a, b, a^2, b^2, a(b^3), bab}
        
        {a, b, a^2, b^2, b(a^3), bab}
        
        {a, b, a^2, b^2, bab, ba(b^2)}
        
        {a, b, a^2, b^2, b^2(a^2), bab}
        
        {a, b, a^2, b^2, bab, b^2ab}
        
        {a, b, a^2, b^2, b^3a, bab}
        
        {a, b, a^2, b^2, b^4, bab}
        
        {a, b, a^2, a^5, b^2, bab}
        
        {a, b, a^2, b^2, a^3(b^2), bab}
        
        {a, b, a^2, b^2, bab, a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2(b^3), bab}
        
        {a, b, a^2, b^2, bab, babab}
        
        {a, b, a^2, b^2, b^2(a^3), bab}
        
        {a, b, a^2, b^2, bab, b^2a(b^2)}
        
        {a, b, a^2, b^2, b^3(a^2), bab}
        
        {a, b, a^2, b^2, b^5, bab}
      - {a, b, a^2, b^2, b^2a} (27 descendants)
        
        {a, b, a^2, b^2, b^3, b^2a}
        
        {a, b, a^2, a^4, b^2, b^2a}
        
        {a, b, a^2, b^2, a^3b, b^2a}
        
        {a, b, a^2, b^2, b^2a, a^2ba}
        
        {a, b, a^2, b^2, a^2(b^2), b^2a}
        
        {a, b, a^2, b^2, b^2a, ab(a^2)}
        
        {a, b, a^2, b^2, a(b^3), b^2a}
        
        {a, b, a^2, b^2, b(a^3), b^2a}
        
        {a, b, a^2, b^2, b^2a, ba(b^2)}
        
        {a, b, a^2, b^2, b^2a, b^2(a^2)}
        
        {a, b, a^2, b^2, b^2a, b^2ab}
        
        {a, b, a^2, b^2, b^2a, b^3a}
        
        {a, b, a^2, b^2, b^4, b^2a}
        
        {a, b, a^2, a^5, b^2, b^2a}
        
        {a, b, a^2, b^2, a^3(b^2), b^2a}
        
        {a, b, a^2, b^2, b^2a, a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2(b^3), b^2a}
        
        {a, b, a^2, b^2, b^2a, b^2(a^3)}
        
        {a, b, a^2, b^2, b^2a, b^2(a^2)b}
        
        {a, b, a^2, b^2, b^2a, b^2aba}
        
        {a, b, a^2, b^2, b^2a, b^2a(b^2)}
        
        {a, b, a^2, b^2, b^2a, b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, b^2a}
        
        {a, b, a^2, b^2, b^2a, b^2(a^4)}
        
        {a, b, a^2, b^2, b^2a, b^2(a^2)(b^2)}
        
        {a, b, a^2, b^2, b^2a, b^2ab(a^2)}
        
        {a, b, a^2, b^2, b^2a, b^2a(b^3)}
      - {a, b, a^2, b^2, b^3} (33 descendants)
        
        {a, b, a^2, a^4, b^2, b^3}
        
        {a, b, a^2, b^2, b^3, a^3b}
        
        {a, b, a^2, b^2, b^3, a^2ba}
        
        {a, b, a^2, b^2, b^3, a^2(b^2)}
        
        {a, b, a^2, b^2, b^3, ab(a^2)}
        
        {a, b, a^2, b^2, b^3, a(b^3)}
        
        {a, b, a^2, b^2, b^3, b(a^3)}
        
        {a, b, a^2, b^2, b^3, ba(b^2)}
        
        {a, b, a^2, b^2, b^3, b^2(a^2)}
        
        {a, b, a^2, b^2, b^3, b^2ab}
        
        {a, b, a^2, b^2, b^3, b^3a}
        
        {a, b, a^2, b^2, b^3, b^4}
        
        {a, b, a^2, a^5, b^2, b^3}
        
        {a, b, a^2, b^2, b^3, a^3(b^2)}
        
        {a, b, a^2, b^2, b^3, a^2b(a^2)}
        
        {a, b, a^2, b^2, b^3, a^2(b^3)}
        
        {a, b, a^2, b^2, b^3, a(b^4)}
        
        {a, b, a^2, b^2, b^3, ba(b^3)}
        
        {a, b, a^2, b^2, b^3, b^2(a^3)}
        
        {a, b, a^2, b^2, b^3, b^2a(b^2)}
        
        {a, b, a^2, b^2, b^3, b^3(a^2)}
        
        {a, b, a^2, b^2, b^3, b^3ab}
        
        {a, b, a^2, b^2, b^3, b^4a}
        
        {a, b, a^2, b^2, b^3, b^5}
        
        {a, b, a^2, b^2, b^3, a^3(b^3)}
        
        {a, b, a^2, b^2, b^3, a^2(b^4)}
        
        {a, b, a^2, b^2, b^3, b^2a(b^3)}
        
        {a, b, a^2, b^2, b^3, b^3(a^3)}
        
        {a, b, a^2, b^2, b^3, b^3a(b^2)}
        
        {a, b, a^2, b^2, b^3, b^4(a^2)}
        
        {a, b, a^2, b^2, b^3, b^6}
        
        {a, b, a^2, b^2, b^3, b^3a(b^3)}
        
        {a, b, a^2, b^2, b^3, b^7}
      - {a, b, a^2, a^4, b^2} (20 descendants)
        
        {a, b, a^2, a^4, b^2, a^3b}
        
        {a, b, a^2, a^4, b^2, a^2ba}
        
        {a, b, a^2, a^4, b^2, a^2(b^2)}
        
        {a, b, a^2, a^4, b^2, ab(a^2)}
        
        {a, b, a^2, a^4, b^2, a(b^3)}
        
        {a, b, a^2, a^4, b^2, b(a^3)}
        
        {a, b, a^2, a^4, b^2, ba(b^2)}
        
        {a, b, a^2, a^4, b^2, b^2(a^2)}
        
        {a, b, a^2, a^4, b^2, b^2ab}
        
        {a, b, a^2, a^4, b^2, b^3a}
        
        {a, b, a^2, a^4, b^2, b^4}
        
        {a, b, a^2, a^4, a^5, b^2}
        
        {a, b, a^2, a^4, b^2, a^3(b^2)}
        
        {a, b, a^2, a^4, b^2, a^2b(a^2)}
        
        {a, b, a^2, a^4, b^2, a^2(b^3)}
        
        {a, b, a^2, a^4, b^2, b^2(a^3)}
        
        {a, b, a^2, a^4, b^2, b^2a(b^2)}
        
        {a, b, a^2, a^4, b^2, b^3(a^2)}
        
        {a, b, a^2, a^4, b^2, b^5}
        
        {a, b, a^2, a^4, a^7, b^2}
      - {a, b, a^2, b^2, a^3b} (18 descendants)
        
        {a, b, a^2, b^2, a^3b, a^2ba}
        
        {a, b, a^2, b^2, a^2(b^2), a^3b}
        
        {a, b, a^2, b^2, a^3b, ab(a^2)}
        
        {a, b, a^2, b^2, a(b^3), a^3b}
        
        {a, b, a^2, b^2, b(a^3), a^3b}
        
        {a, b, a^2, b^2, a^3b, ba(b^2)}
        
        {a, b, a^2, b^2, a^3b, b^2(a^2)}
        
        {a, b, a^2, b^2, a^3b, b^2ab}
        
        {a, b, a^2, b^2, a^3b, b^3a}
        
        {a, b, a^2, b^2, b^4, a^3b}
        
        {a, b, a^2, a^5, b^2, a^3b}
        
        {a, b, a^2, b^2, a^3b, a^3(b^2)}
        
        {a, b, a^2, b^2, a^3b, a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2(b^3), a^3b}
        
        {a, b, a^2, b^2, a^3b, b^2(a^3)}
        
        {a, b, a^2, b^2, a^3b, b^2a(b^2)}
        
        {a, b, a^2, b^2, a^3b, b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, a^3b}
      - {a, b, a^2, b^2, a^2ba} (17 descendants)
        
        {a, b, a^2, b^2, a^2(b^2), a^2ba}
        
        {a, b, a^2, b^2, ab(a^2), a^2ba}
        
        {a, b, a^2, b^2, a(b^3), a^2ba}
        
        {a, b, a^2, b^2, b(a^3), a^2ba}
        
        {a, b, a^2, b^2, ba(b^2), a^2ba}
        
        {a, b, a^2, b^2, b^2(a^2), a^2ba}
        
        {a, b, a^2, b^2, a^2ba, b^2ab}
        
        {a, b, a^2, b^2, b^3a, a^2ba}
        
        {a, b, a^2, b^2, b^4, a^2ba}
        
        {a, b, a^2, a^5, b^2, a^2ba}
        
        {a, b, a^2, b^2, a^3(b^2), a^2ba}
        
        {a, b, a^2, b^2, a^2ba, a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2(b^3), a^2ba}
        
        {a, b, a^2, b^2, b^2(a^3), a^2ba}
        
        {a, b, a^2, b^2, a^2ba, b^2a(b^2)}
        
        {a, b, a^2, b^2, b^3(a^2), a^2ba}
        
        {a, b, a^2, b^2, b^5, a^2ba}
      - {a, b, a^2, b^2, a^2(b^2)} (16 descendants)
        
        {a, b, a^2, b^2, a^2(b^2), ab(a^2)}
        
        {a, b, a^2, b^2, a(b^3), a^2(b^2)}
        
        {a, b, a^2, b^2, b(a^3), a^2(b^2)}
        
        {a, b, a^2, b^2, a^2(b^2), ba(b^2)}
        
        {a, b, a^2, b^2, a^2(b^2), b^2(a^2)}
        
        {a, b, a^2, b^2, a^2(b^2), b^2ab}
        
        {a, b, a^2, b^2, a^2(b^2), b^3a}
        
        {a, b, a^2, b^2, b^4, a^2(b^2)}
        
        {a, b, a^2, a^5, b^2, a^2(b^2)}
        
        {a, b, a^2, b^2, a^2(b^2), a^3(b^2)}
        
        {a, b, a^2, b^2, a^2(b^2), a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2(b^2), a^2(b^3)}
        
        {a, b, a^2, b^2, a^2(b^2), b^2(a^3)}
        
        {a, b, a^2, b^2, a^2(b^2), b^2a(b^2)}
        
        {a, b, a^2, b^2, a^2(b^2), b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, a^2(b^2)}
      - {a, b, a^2, b^2, ab(a^2)} (15 descendants)
        
        {a, b, a^2, b^2, a(b^3), ab(a^2)}
        
        {a, b, a^2, b^2, b(a^3), ab(a^2)}
        
        {a, b, a^2, b^2, ab(a^2), ba(b^2)}
        
        {a, b, a^2, b^2, b^2(a^2), ab(a^2)}
        
        {a, b, a^2, b^2, ab(a^2), b^2ab}
        
        {a, b, a^2, b^2, b^3a, ab(a^2)}
        
        {a, b, a^2, b^2, b^4, ab(a^2)}
        
        {a, b, a^2, a^5, b^2, ab(a^2)}
        
        {a, b, a^2, b^2, a^3(b^2), ab(a^2)}
        
        {a, b, a^2, b^2, ab(a^2), a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2(b^3), ab(a^2)}
        
        {a, b, a^2, b^2, b^2(a^3), ab(a^2)}
        
        {a, b, a^2, b^2, ab(a^2), b^2a(b^2)}
        
        {a, b, a^2, b^2, b^3(a^2), ab(a^2)}
        
        {a, b, a^2, b^2, b^5, ab(a^2)}
      - {a, b, a^2, b^2, a(b^3)} (14 descendants)
        
        {a, b, a^2, b^2, a(b^3), b(a^3)}
        
        {a, b, a^2, b^2, a(b^3), ba(b^2)}
        
        {a, b, a^2, b^2, a(b^3), b^2(a^2)}
        
        {a, b, a^2, b^2, a(b^3), b^2ab}
        
        {a, b, a^2, b^2, a(b^3), b^3a}
        
        {a, b, a^2, b^2, b^4, a(b^3)}
        
        {a, b, a^2, a^5, b^2, a(b^3)}
        
        {a, b, a^2, b^2, a(b^3), a^3(b^2)}
        
        {a, b, a^2, b^2, a(b^3), a^2b(a^2)}
        
        {a, b, a^2, b^2, a(b^3), a^2(b^3)}
        
        {a, b, a^2, b^2, a(b^3), b^2(a^3)}
        
        {a, b, a^2, b^2, a(b^3), b^2a(b^2)}
        
        {a, b, a^2, b^2, a(b^3), b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, a(b^3)}
      - {a, b, a^2, b^2, b(a^3)} (13 descendants)
        
        {a, b, a^2, b^2, b(a^3), ba(b^2)}
        
        {a, b, a^2, b^2, b(a^3), b^2(a^2)}
        
        {a, b, a^2, b^2, b(a^3), b^2ab}
        
        {a, b, a^2, b^2, b(a^3), b^3a}
        
        {a, b, a^2, b^2, b^4, b(a^3)}
        
        {a, b, a^2, a^5, b^2, b(a^3)}
        
        {a, b, a^2, b^2, b(a^3), a^3(b^2)}
        
        {a, b, a^2, b^2, b(a^3), a^2b(a^2)}
        
        {a, b, a^2, b^2, b(a^3), a^2(b^3)}
        
        {a, b, a^2, b^2, b(a^3), b^2(a^3)}
        
        {a, b, a^2, b^2, b(a^3), b^2a(b^2)}
        
        {a, b, a^2, b^2, b(a^3), b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, b(a^3)}
      - {a, b, a^2, b^2, ba(b^2)} (12 descendants)
        
        {a, b, a^2, b^2, b^2(a^2), ba(b^2)}
        
        {a, b, a^2, b^2, ba(b^2), b^2ab}
        
        {a, b, a^2, b^2, b^3a, ba(b^2)}
        
        {a, b, a^2, b^2, b^4, ba(b^2)}
        
        {a, b, a^2, a^5, b^2, ba(b^2)}
        
        {a, b, a^2, b^2, a^3(b^2), ba(b^2)}
        
        {a, b, a^2, b^2, ba(b^2), a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2(b^3), ba(b^2)}
        
        {a, b, a^2, b^2, b^2(a^3), ba(b^2)}
        
        {a, b, a^2, b^2, ba(b^2), b^2a(b^2)}
        
        {a, b, a^2, b^2, b^3(a^2), ba(b^2)}
        
        {a, b, a^2, b^2, b^5, ba(b^2)}
      - {a, b, a^2, b^2, b^2(a^2)} (11 descendants)
        
        {a, b, a^2, b^2, b^2(a^2), b^2ab}
        
        {a, b, a^2, b^2, b^2(a^2), b^3a}
        
        {a, b, a^2, b^2, b^4, b^2(a^2)}
        
        {a, b, a^2, a^5, b^2, b^2(a^2)}
        
        {a, b, a^2, b^2, a^3(b^2), b^2(a^2)}
        
        {a, b, a^2, b^2, b^2(a^2), a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2(b^3), b^2(a^2)}
        
        {a, b, a^2, b^2, b^2(a^2), b^2(a^3)}
        
        {a, b, a^2, b^2, b^2(a^2), b^2a(b^2)}
        
        {a, b, a^2, b^2, b^2(a^2), b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, b^2(a^2)}
      - {a, b, a^2, b^2, b^2ab} (10 descendants)
        
        {a, b, a^2, b^2, b^3a, b^2ab}
        
        {a, b, a^2, b^2, b^4, b^2ab}
        
        {a, b, a^2, a^5, b^2, b^2ab}
        
        {a, b, a^2, b^2, a^3(b^2), b^2ab}
        
        {a, b, a^2, b^2, a^2b(a^2), b^2ab}
        
        {a, b, a^2, b^2, a^2(b^3), b^2ab}
        
        {a, b, a^2, b^2, b^2(a^3), b^2ab}
        
        {a, b, a^2, b^2, b^2ab, b^2a(b^2)}
        
        {a, b, a^2, b^2, b^3(a^2), b^2ab}
        
        {a, b, a^2, b^2, b^5, b^2ab}
      - {a, b, a^2, b^2, b^3a} (9 descendants)
        
        {a, b, a^2, b^2, b^4, b^3a}
        
        {a, b, a^2, a^5, b^2, b^3a}
        
        {a, b, a^2, b^2, a^3(b^2), b^3a}
        
        {a, b, a^2, b^2, b^3a, a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2(b^3), b^3a}
        
        {a, b, a^2, b^2, b^2(a^3), b^3a}
        
        {a, b, a^2, b^2, b^3a, b^2a(b^2)}
        
        {a, b, a^2, b^2, b^3a, b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, b^3a}
      - {a, b, a^2, b^2, b^4} (9 descendants)
        
        {a, b, a^2, a^5, b^2, b^4}
        
        {a, b, a^2, b^2, b^4, a^3(b^2)}
        
        {a, b, a^2, b^2, b^4, a^2b(a^2)}
        
        {a, b, a^2, b^2, b^4, a^2(b^3)}
        
        {a, b, a^2, b^2, b^4, b^2(a^3)}
        
        {a, b, a^2, b^2, b^4, b^2a(b^2)}
        
        {a, b, a^2, b^2, b^4, b^3(a^2)}
        
        {a, b, a^2, b^2, b^4, b^5}
        
        {a, b, a^2, b^2, b^4, b^7}
      - {a, b, a^2, a^5, b^2} (7 descendants)
        
        {a, b, a^2, a^5, b^2, a^3(b^2)}
        
        {a, b, a^2, a^5, b^2, a^2b(a^2)}
        
        {a, b, a^2, a^5, b^2, a^2(b^3)}
        
        {a, b, a^2, a^5, b^2, b^2(a^3)}
        
        {a, b, a^2, a^5, b^2, b^2a(b^2)}
        
        {a, b, a^2, a^5, b^2, b^3(a^2)}
        
        {a, b, a^2, a^5, b^2, b^5}
      - {a, b, a^2, b^2, a^3(b^2)} (6 descendants)
        
        {a, b, a^2, b^2, a^3(b^2), a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2(b^3), a^3(b^2)}
        
        {a, b, a^2, b^2, a^3(b^2), b^2(a^3)}
        
        {a, b, a^2, b^2, a^3(b^2), b^2a(b^2)}
        
        {a, b, a^2, b^2, a^3(b^2), b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, a^3(b^2)}
      - {a, b, a^2, b^2, a^2b(a^2)} (5 descendants)
        
        {a, b, a^2, b^2, a^2(b^3), a^2b(a^2)}
        
        {a, b, a^2, b^2, b^2(a^3), a^2b(a^2)}
        
        {a, b, a^2, b^2, a^2b(a^2), b^2a(b^2)}
        
        {a, b, a^2, b^2, b^3(a^2), a^2b(a^2)}
        
        {a, b, a^2, b^2, b^5, a^2b(a^2)}
      - {a, b, a^2, b^2, a^2(b^3)} (4 descendants)
        
        {a, b, a^2, b^2, a^2(b^3), b^2(a^3)}
        
        {a, b, a^2, b^2, a^2(b^3), b^2a(b^2)}
        
        {a, b, a^2, b^2, a^2(b^3), b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, a^2(b^3)}
      - {a, b, a^2, b^2, b^2(a^3)} (3 descendants)
        
        {a, b, a^2, b^2, b^2(a^3), b^2a(b^2)}
        
        {a, b, a^2, b^2, b^2(a^3), b^3(a^2)}
        
        {a, b, a^2, b^2, b^5, b^2(a^3)}
      - {a, b, a^2, b^2, b^2a(b^2)} (2 descendants)
        
        {a, b, a^2, b^2, b^3(a^2), b^2a(b^2)}
        
        {a, b, a^2, b^2, b^5, b^2a(b^2)}
      - {a, b, a^2, b^2, b^3(a^2)} (1 descendant)
        
        {a, b, a^2, b^2, b^5, b^3(a^2)}
      - {a, b, a^2, b^2, b^5} (0 descendants)
    - {a, b, a^2, a^3} (27 descendants)
      - {a, b, a^2, a^3, a^2b} (32 descendants)
        
        {a, b, a^2, a^3, a^2b, aba}
        
        {a, b, a^2, a^3, a(b^2), a^2b}
        
        {a, b, a^2, a^3, b(a^2), a^2b}
        
        {a, b, a^2, a^3, a^2b, bab}
        
        {a, b, a^2, a^3, a^2b, b^2a}
        
        {a, b, a^2, a^3, b^3, a^2b}
        
        {a, b, a^2, a^3, a^4, a^2b}
        
        {a, b, a^2, a^3, a^2b, a^3b}
        
        {a, b, a^2, a^3, a^2b, a^2ba}
        
        {a, b, a^2, a^3, a^2b, a^2(b^2)}
        
        {a, b, a^2, a^3, a^2b, ab(a^2)}
        
        {a, b, a^2, a^3, b(a^3), a^2b}
        
        {a, b, a^2, a^3, a^2b, b^2(a^2)}
        
        {a, b, a^2, a^3, a^5, a^2b}
        
        {a, b, a^2, a^3, a^2b, a^4b}
        
        {a, b, a^2, a^3, a^2b, a^3ba}
        
        {a, b, a^2, a^3, a^2b, a^3(b^2)}
        
        {a, b, a^2, a^3, a^2b, a^2b(a^2)}
        
        {a, b, a^2, a^3, a^2b, a^2bab}
        
        {a, b, a^2, a^3, a^2b, a^2(b^2)a}
        
        {a, b, a^2, a^3, a^2b, a^2(b^3)}
        
        {a, b, a^2, a^3, a^2b, ab(a^3)}
        
        {a, b, a^2, a^3, b(a^4), a^2b}
        
        {a, b, a^2, a^3, a^2b, b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, a^2b}
        
        {a, b, a^2, a^3, a^2b, a^3b(a^2)}
        
        {a, b, a^2, a^3, a^2b, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^2b, a^2(b^2)(a^2)}
        
        {a, b, a^2, a^3, a^7, a^2b}
        
        {a, b, a^2, a^3, a^2b, a^3b(a^3)}
        
        {a, b, a^2, a^3, a^2b, a^2b(a^4)}
        
        {a, b, a^2, a^3, a^2b, a^2(b^2)(a^3)}
      - {a, b, a^2, a^3, aba} (26 descendants)
        
        {a, b, a^2, a^3, a(b^2), aba}
        
        {a, b, a^2, a^3, b(a^2), aba}
        
        {a, b, a^2, a^3, aba, bab}
        
        {a, b, a^2, a^3, b^2a, aba}
        
        {a, b, a^2, a^3, b^3, aba}
        
        {a, b, a^2, a^3, a^4, aba}
        
        {a, b, a^2, a^3, a^3b, aba}
        
        {a, b, a^2, a^3, aba, a^2ba}
        
        {a, b, a^2, a^3, a^2(b^2), aba}
        
        {a, b, a^2, a^3, aba, ab(a^2)}
        
        {a, b, a^2, a^3, b(a^3), aba}
        
        {a, b, a^2, a^3, b^2(a^2), aba}
        
        {a, b, a^2, a^3, a^5, aba}
        
        {a, b, a^2, a^3, a^4b, aba}
        
        {a, b, a^2, a^3, aba, a^3ba}
        
        {a, b, a^2, a^3, a^3(b^2), aba}
        
        {a, b, a^2, a^3, aba, a^2b(a^2)}
        
        {a, b, a^2, a^3, aba, ab(a^3)}
        
        {a, b, a^2, a^3, aba, ababa}
        
        {a, b, a^2, a^3, b(a^4), aba}
        
        {a, b, a^2, a^3, b^2(a^3), aba}
        
        {a, b, a^2, a^3, a^6, aba}
        
        {a, b, a^2, a^3, aba, a^3b(a^2)}
        
        {a, b, a^2, a^3, aba, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, aba}
        
        {a, b, a^2, a^3, aba, a^3b(a^3)}
      - {a, b, a^2, a^3, a(b^2)} (24 descendants)
        
        {a, b, a^2, a^3, a(b^2), b(a^2)}
        
        {a, b, a^2, a^3, a(b^2), bab}
        
        {a, b, a^2, a^3, a(b^2), b^2a}
        
        {a, b, a^2, a^3, b^3, a(b^2)}
        
        {a, b, a^2, a^3, a^4, a(b^2)}
        
        {a, b, a^2, a^3, a(b^2), a^3b}
        
        {a, b, a^2, a^3, a(b^2), a^2ba}
        
        {a, b, a^2, a^3, a(b^2), a^2(b^2)}
        
        {a, b, a^2, a^3, a(b^2), ab(a^2)}
        
        {a, b, a^2, a^3, a(b^2), b(a^3)}
        
        {a, b, a^2, a^3, a(b^2), b^2(a^2)}
        
        {a, b, a^2, a^3, a^5, a(b^2)}
        
        {a, b, a^2, a^3, a(b^2), a^4b}
        
        {a, b, a^2, a^3, a(b^2), a^3ba}
        
        {a, b, a^2, a^3, a(b^2), a^3(b^2)}
        
        {a, b, a^2, a^3, a(b^2), a^2b(a^2)}
        
        {a, b, a^2, a^3, a(b^2), ab(a^3)}
        
        {a, b, a^2, a^3, a(b^2), b(a^4)}
        
        {a, b, a^2, a^3, a(b^2), b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, a(b^2)}
        
        {a, b, a^2, a^3, a(b^2), a^3b(a^2)}
        
        {a, b, a^2, a^3, a(b^2), a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, a(b^2)}
        
        {a, b, a^2, a^3, a(b^2), a^3b(a^3)}
      - {a, b, a^2, a^3, b(a^2)} (29 descendants)
        
        {a, b, a^2, a^3, b(a^2), bab}
        
        {a, b, a^2, a^3, b(a^2), b^2a}
        
        {a, b, a^2, a^3, b^3, b(a^2)}
        
        {a, b, a^2, a^3, a^4, b(a^2)}
        
        {a, b, a^2, a^3, b(a^2), a^3b}
        
        {a, b, a^2, a^3, b(a^2), a^2ba}
        
        {a, b, a^2, a^3, b(a^2), a^2(b^2)}
        
        {a, b, a^2, a^3, b(a^2), ab(a^2)}
        
        {a, b, a^2, a^3, b(a^2), b(a^3)}
        
        {a, b, a^2, a^3, b(a^2), b^2(a^2)}
        
        {a, b, a^2, a^3, a^5, b(a^2)}
        
        {a, b, a^2, a^3, b(a^2), a^4b}
        
        {a, b, a^2, a^3, b(a^2), a^3ba}
        
        {a, b, a^2, a^3, b(a^2), a^3(b^2)}
        
        {a, b, a^2, a^3, b(a^2), a^2b(a^2)}
        
        {a, b, a^2, a^3, b(a^2), ab(a^3)}
        
        {a, b, a^2, a^3, b(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, a^3, b(a^2), b(a^4)}
        
        {a, b, a^2, a^3, b(a^2), bab(a^2)}
        
        {a, b, a^2, a^3, b(a^2), b^2(a^3)}
        
        {a, b, a^2, a^3, b(a^2), b^3(a^2)}
        
        {a, b, a^2, a^3, a^6, b(a^2)}
        
        {a, b, a^2, a^3, b(a^2), a^3b(a^2)}
        
        {a, b, a^2, a^3, b(a^2), a^2b(a^3)}
        
        {a, b, a^2, a^3, b(a^2), a^2(b^2)(a^2)}
        
        {a, b, a^2, a^3, a^7, b(a^2)}
        
        {a, b, a^2, a^3, b(a^2), a^4b(a^2)}
        
        {a, b, a^2, a^3, b(a^2), a^3b(a^3)}
        
        {a, b, a^2, a^3, b(a^2), a^3(b^2)(a^2)}
      - {a, b, a^2, a^3, bab} (23 descendants)
        
        {a, b, a^2, a^3, b^2a, bab}
        
        {a, b, a^2, a^3, b^3, bab}
        
        {a, b, a^2, a^3, a^4, bab}
        
        {a, b, a^2, a^3, a^3b, bab}
        
        {a, b, a^2, a^3, bab, a^2ba}
        
        {a, b, a^2, a^3, a^2(b^2), bab}
        
        {a, b, a^2, a^3, ab(a^2), bab}
        
        {a, b, a^2, a^3, b(a^3), bab}
        
        {a, b, a^2, a^3, b^2(a^2), bab}
        
        {a, b, a^2, a^3, a^5, bab}
        
        {a, b, a^2, a^3, a^4b, bab}
        
        {a, b, a^2, a^3, bab, a^3ba}
        
        {a, b, a^2, a^3, a^3(b^2), bab}
        
        {a, b, a^2, a^3, bab, a^2b(a^2)}
        
        {a, b, a^2, a^3, ab(a^3), bab}
        
        {a, b, a^2, a^3, b(a^4), bab}
        
        {a, b, a^2, a^3, bab, babab}
        
        {a, b, a^2, a^3, b^2(a^3), bab}
        
        {a, b, a^2, a^3, a^6, bab}
        
        {a, b, a^2, a^3, bab, a^3b(a^2)}
        
        {a, b, a^2, a^3, bab, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, bab}
        
        {a, b, a^2, a^3, bab, a^3b(a^3)}
      - {a, b, a^2, a^3, b^2a} (21 descendants)
        
        {a, b, a^2, a^3, b^3, b^2a}
        
        {a, b, a^2, a^3, a^4, b^2a}
        
        {a, b, a^2, a^3, a^3b, b^2a}
        
        {a, b, a^2, a^3, b^2a, a^2ba}
        
        {a, b, a^2, a^3, a^2(b^2), b^2a}
        
        {a, b, a^2, a^3, b^2a, ab(a^2)}
        
        {a, b, a^2, a^3, b(a^3), b^2a}
        
        {a, b, a^2, a^3, b^2a, b^2(a^2)}
        
        {a, b, a^2, a^3, a^5, b^2a}
        
        {a, b, a^2, a^3, a^4b, b^2a}
        
        {a, b, a^2, a^3, b^2a, a^3ba}
        
        {a, b, a^2, a^3, a^3(b^2), b^2a}
        
        {a, b, a^2, a^3, b^2a, a^2b(a^2)}
        
        {a, b, a^2, a^3, b^2a, ab(a^3)}
        
        {a, b, a^2, a^3, b(a^4), b^2a}
        
        {a, b, a^2, a^3, b^2a, b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, b^2a}
        
        {a, b, a^2, a^3, b^2a, a^3b(a^2)}
        
        {a, b, a^2, a^3, b^2a, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, b^2a}
        
        {a, b, a^2, a^3, b^2a, a^3b(a^3)}
      - {a, b, a^2, a^3, b^3} (21 descendants)
        
        {a, b, a^2, a^3, a^4, b^3}
        
        {a, b, a^2, a^3, b^3, a^3b}
        
        {a, b, a^2, a^3, b^3, a^2ba}
        
        {a, b, a^2, a^3, b^3, a^2(b^2)}
        
        {a, b, a^2, a^3, b^3, ab(a^2)}
        
        {a, b, a^2, a^3, b^3, b(a^3)}
        
        {a, b, a^2, a^3, b^3, b^2(a^2)}
        
        {a, b, a^2, a^3, a^5, b^3}
        
        {a, b, a^2, a^3, b^3, a^4b}
        
        {a, b, a^2, a^3, b^3, a^3ba}
        
        {a, b, a^2, a^3, b^3, a^3(b^2)}
        
        {a, b, a^2, a^3, b^3, a^2b(a^2)}
        
        {a, b, a^2, a^3, b^3, ab(a^3)}
        
        {a, b, a^2, a^3, b^3, b(a^4)}
        
        {a, b, a^2, a^3, b^3, b^2(a^3)}
        
        {a, b, a^2, a^3, b^3, b^5}
        
        {a, b, a^2, a^3, a^6, b^3}
        
        {a, b, a^2, a^3, b^3, a^3b(a^2)}
        
        {a, b, a^2, a^3, b^3, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, b^3}
        
        {a, b, a^2, a^3, b^3, a^3b(a^3)}
      - {a, b, a^2, a^3, a^4} (32 descendants)
        
        {a, b, a^2, a^3, a^4, a^3b}
        
        {a, b, a^2, a^3, a^4, a^2ba}
        
        {a, b, a^2, a^3, a^4, a^2(b^2)}
        
        {a, b, a^2, a^3, a^4, ab(a^2)}
        
        {a, b, a^2, a^3, a^4, b(a^3)}
        
        {a, b, a^2, a^3, a^4, b^2(a^2)}
        
        {a, b, a^2, a^3, a^4, a^5}
        
        {a, b, a^2, a^3, a^4, a^4b}
        
        {a, b, a^2, a^3, a^4, a^3ba}
        
        {a, b, a^2, a^3, a^4, a^3(b^2)}
        
        {a, b, a^2, a^3, a^4, a^2b(a^2)}
        
        {a, b, a^2, a^3, a^4, ab(a^3)}
        
        {a, b, a^2, a^3, a^4, b(a^4)}
        
        {a, b, a^2, a^3, a^4, b^2(a^3)}
        
        {a, b, a^2, a^3, a^4, a^6}
        
        {a, b, a^2, a^3, a^4, a^5b}
        
        {a, b, a^2, a^3, a^4, a^4ba}
        
        {a, b, a^2, a^3, a^4, a^4(b^2)}
        
        {a, b, a^2, a^3, a^4, a^3b(a^2)}
        
        {a, b, a^2, a^3, a^4, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^4, ab(a^4)}
        
        {a, b, a^2, a^3, a^4, b(a^5)}
        
        {a, b, a^2, a^3, a^4, b^2(a^4)}
        
        {a, b, a^2, a^3, a^4, a^7}
        
        {a, b, a^2, a^3, a^4, a^4b(a^2)}
        
        {a, b, a^2, a^3, a^4, a^3b(a^3)}
        
        {a, b, a^2, a^3, a^4, a^2b(a^4)}
        
        {a, b, a^2, a^3, a^4, a^8}
        
        {a, b, a^2, a^3, a^4, a^4b(a^3)}
        
        {a, b, a^2, a^3, a^4, a^3b(a^4)}
        
        {a, b, a^2, a^3, a^4, a^9}
        
        {a, b, a^2, a^3, a^4, a^4b(a^4)}
      - {a, b, a^2, a^3, a^3b} (24 descendants)
        
        {a, b, a^2, a^3, a^3b, a^2ba}
        
        {a, b, a^2, a^3, a^2(b^2), a^3b}
        
        {a, b, a^2, a^3, a^3b, ab(a^2)}
        
        {a, b, a^2, a^3, b(a^3), a^3b}
        
        {a, b, a^2, a^3, a^3b, b^2(a^2)}
        
        {a, b, a^2, a^3, a^5, a^3b}
        
        {a, b, a^2, a^3, a^3b, a^4b}
        
        {a, b, a^2, a^3, a^3b, a^3ba}
        
        {a, b, a^2, a^3, a^3b, a^3(b^2)}
        
        {a, b, a^2, a^3, a^3b, a^2b(a^2)}
        
        {a, b, a^2, a^3, a^3b, ab(a^3)}
        
        {a, b, a^2, a^3, b(a^4), a^3b}
        
        {a, b, a^2, a^3, a^3b, b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, a^3b}
        
        {a, b, a^2, a^3, a^3b, a^3b(a^2)}
        
        {a, b, a^2, a^3, a^3b, a^3bab}
        
        {a, b, a^2, a^3, a^3b, a^3(b^2)a}
        
        {a, b, a^2, a^3, a^3b, a^3(b^3)}
        
        {a, b, a^2, a^3, a^3b, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, a^3b}
        
        {a, b, a^2, a^3, a^3b, a^3b(a^3)}
        
        {a, b, a^2, a^3, a^3b, a^3(b^2)(a^2)}
        
        {a, b, a^2, a^3, a^3b, a^3b(a^4)}
        
        {a, b, a^2, a^3, a^3b, a^3(b^2)(a^3)}
      - {a, b, a^2, a^3, a^2ba} (17 descendants)
        
        {a, b, a^2, a^3, a^2(b^2), a^2ba}
        
        {a, b, a^2, a^3, ab(a^2), a^2ba}
        
        {a, b, a^2, a^3, b(a^3), a^2ba}
        
        {a, b, a^2, a^3, b^2(a^2), a^2ba}
        
        {a, b, a^2, a^3, a^5, a^2ba}
        
        {a, b, a^2, a^3, a^4b, a^2ba}
        
        {a, b, a^2, a^3, a^2ba, a^3ba}
        
        {a, b, a^2, a^3, a^3(b^2), a^2ba}
        
        {a, b, a^2, a^3, a^2ba, a^2b(a^2)}
        
        {a, b, a^2, a^3, ab(a^3), a^2ba}
        
        {a, b, a^2, a^3, b(a^4), a^2ba}
        
        {a, b, a^2, a^3, b^2(a^3), a^2ba}
        
        {a, b, a^2, a^3, a^6, a^2ba}
        
        {a, b, a^2, a^3, a^2ba, a^3b(a^2)}
        
        {a, b, a^2, a^3, a^2ba, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, a^2ba}
        
        {a, b, a^2, a^3, a^2ba, a^3b(a^3)}
      - {a, b, a^2, a^3, a^2(b^2)} (16 descendants)
        
        {a, b, a^2, a^3, a^2(b^2), ab(a^2)}
        
        {a, b, a^2, a^3, b(a^3), a^2(b^2)}
        
        {a, b, a^2, a^3, a^2(b^2), b^2(a^2)}
        
        {a, b, a^2, a^3, a^5, a^2(b^2)}
        
        {a, b, a^2, a^3, a^2(b^2), a^4b}
        
        {a, b, a^2, a^3, a^2(b^2), a^3ba}
        
        {a, b, a^2, a^3, a^2(b^2), a^3(b^2)}
        
        {a, b, a^2, a^3, a^2(b^2), a^2b(a^2)}
        
        {a, b, a^2, a^3, a^2(b^2), ab(a^3)}
        
        {a, b, a^2, a^3, b(a^4), a^2(b^2)}
        
        {a, b, a^2, a^3, a^2(b^2), b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, a^2(b^2)}
        
        {a, b, a^2, a^3, a^2(b^2), a^3b(a^2)}
        
        {a, b, a^2, a^3, a^2(b^2), a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, a^2(b^2)}
        
        {a, b, a^2, a^3, a^2(b^2), a^3b(a^3)}
      - {a, b, a^2, a^3, ab(a^2)} (15 descendants)
        
        {a, b, a^2, a^3, b(a^3), ab(a^2)}
        
        {a, b, a^2, a^3, b^2(a^2), ab(a^2)}
        
        {a, b, a^2, a^3, a^5, ab(a^2)}
        
        {a, b, a^2, a^3, a^4b, ab(a^2)}
        
        {a, b, a^2, a^3, ab(a^2), a^3ba}
        
        {a, b, a^2, a^3, a^3(b^2), ab(a^2)}
        
        {a, b, a^2, a^3, ab(a^2), a^2b(a^2)}
        
        {a, b, a^2, a^3, ab(a^2), ab(a^3)}
        
        {a, b, a^2, a^3, b(a^4), ab(a^2)}
        
        {a, b, a^2, a^3, b^2(a^3), ab(a^2)}
        
        {a, b, a^2, a^3, a^6, ab(a^2)}
        
        {a, b, a^2, a^3, ab(a^2), a^3b(a^2)}
        
        {a, b, a^2, a^3, ab(a^2), a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, ab(a^2)}
        
        {a, b, a^2, a^3, ab(a^2), a^3b(a^3)}
      - {a, b, a^2, a^3, b(a^3)} (20 descendants)
        
        {a, b, a^2, a^3, b(a^3), b^2(a^2)}
        
        {a, b, a^2, a^3, a^5, b(a^3)}
        
        {a, b, a^2, a^3, b(a^3), a^4b}
        
        {a, b, a^2, a^3, b(a^3), a^3ba}
        
        {a, b, a^2, a^3, b(a^3), a^3(b^2)}
        
        {a, b, a^2, a^3, b(a^3), a^2b(a^2)}
        
        {a, b, a^2, a^3, b(a^3), ab(a^3)}
        
        {a, b, a^2, a^3, b(a^3), b(a^4)}
        
        {a, b, a^2, a^3, b(a^3), b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, b(a^3)}
        
        {a, b, a^2, a^3, b(a^3), a^3b(a^2)}
        
        {a, b, a^2, a^3, b(a^3), a^2b(a^3)}
        
        {a, b, a^2, a^3, b(a^3), a(b^2)(a^3)}
        
        {a, b, a^2, a^3, b(a^3), bab(a^3)}
        
        {a, b, a^2, a^3, b(a^3), b^3(a^3)}
        
        {a, b, a^2, a^3, a^7, b(a^3)}
        
        {a, b, a^2, a^3, b(a^3), a^3b(a^3)}
        
        {a, b, a^2, a^3, b(a^3), a^2(b^2)(a^3)}
        
        {a, b, a^2, a^3, b(a^3), a^4b(a^3)}
        
        {a, b, a^2, a^3, b(a^3), a^3(b^2)(a^3)}
      - {a, b, a^2, a^3, b^2(a^2)} (13 descendants)
        
        {a, b, a^2, a^3, a^5, b^2(a^2)}
        
        {a, b, a^2, a^3, a^4b, b^2(a^2)}
        
        {a, b, a^2, a^3, b^2(a^2), a^3ba}
        
        {a, b, a^2, a^3, a^3(b^2), b^2(a^2)}
        
        {a, b, a^2, a^3, b^2(a^2), a^2b(a^2)}
        
        {a, b, a^2, a^3, b^2(a^2), ab(a^3)}
        
        {a, b, a^2, a^3, b(a^4), b^2(a^2)}
        
        {a, b, a^2, a^3, b^2(a^2), b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, b^2(a^2)}
        
        {a, b, a^2, a^3, b^2(a^2), a^3b(a^2)}
        
        {a, b, a^2, a^3, b^2(a^2), a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, b^2(a^2)}
        
        {a, b, a^2, a^3, b^2(a^2), a^3b(a^3)}
      - {a, b, a^2, a^3, a^5} (13 descendants)
        
        {a, b, a^2, a^3, a^5, a^4b}
        
        {a, b, a^2, a^3, a^5, a^3ba}
        
        {a, b, a^2, a^3, a^5, a^3(b^2)}
        
        {a, b, a^2, a^3, a^5, a^2b(a^2)}
        
        {a, b, a^2, a^3, a^5, ab(a^3)}
        
        {a, b, a^2, a^3, a^5, b(a^4)}
        
        {a, b, a^2, a^3, a^5, b^2(a^3)}
        
        {a, b, a^2, a^3, a^5, a^6}
        
        {a, b, a^2, a^3, a^5, a^3b(a^2)}
        
        {a, b, a^2, a^3, a^5, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^5, a^7}
        
        {a, b, a^2, a^3, a^5, a^3b(a^3)}
        
        {a, b, a^2, a^3, a^5, a^9}
      - {a, b, a^2, a^3, a^4b} (11 descendants)
        
        {a, b, a^2, a^3, a^4b, a^3ba}
        
        {a, b, a^2, a^3, a^3(b^2), a^4b}
        
        {a, b, a^2, a^3, a^4b, a^2b(a^2)}
        
        {a, b, a^2, a^3, a^4b, ab(a^3)}
        
        {a, b, a^2, a^3, b(a^4), a^4b}
        
        {a, b, a^2, a^3, a^4b, b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, a^4b}
        
        {a, b, a^2, a^3, a^4b, a^3b(a^2)}
        
        {a, b, a^2, a^3, a^4b, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, a^4b}
        
        {a, b, a^2, a^3, a^4b, a^3b(a^3)}
      - {a, b, a^2, a^3, a^3ba} (10 descendants)
        
        {a, b, a^2, a^3, a^3(b^2), a^3ba}
        
        {a, b, a^2, a^3, a^2b(a^2), a^3ba}
        
        {a, b, a^2, a^3, ab(a^3), a^3ba}
        
        {a, b, a^2, a^3, b(a^4), a^3ba}
        
        {a, b, a^2, a^3, b^2(a^3), a^3ba}
        
        {a, b, a^2, a^3, a^6, a^3ba}
        
        {a, b, a^2, a^3, a^3ba, a^3b(a^2)}
        
        {a, b, a^2, a^3, a^2b(a^3), a^3ba}
        
        {a, b, a^2, a^3, a^7, a^3ba}
        
        {a, b, a^2, a^3, a^3ba, a^3b(a^3)}
      - {a, b, a^2, a^3, a^3(b^2)} (9 descendants)
        
        {a, b, a^2, a^3, a^3(b^2), a^2b(a^2)}
        
        {a, b, a^2, a^3, a^3(b^2), ab(a^3)}
        
        {a, b, a^2, a^3, b(a^4), a^3(b^2)}
        
        {a, b, a^2, a^3, a^3(b^2), b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, a^3(b^2)}
        
        {a, b, a^2, a^3, a^3(b^2), a^3b(a^2)}
        
        {a, b, a^2, a^3, a^3(b^2), a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, a^3(b^2)}
        
        {a, b, a^2, a^3, a^3(b^2), a^3b(a^3)}
      - {a, b, a^2, a^3, a^2b(a^2)} (8 descendants)
        
        {a, b, a^2, a^3, ab(a^3), a^2b(a^2)}
        
        {a, b, a^2, a^3, b(a^4), a^2b(a^2)}
        
        {a, b, a^2, a^3, b^2(a^3), a^2b(a^2)}
        
        {a, b, a^2, a^3, a^6, a^2b(a^2)}
        
        {a, b, a^2, a^3, a^2b(a^2), a^3b(a^2)}
        
        {a, b, a^2, a^3, a^2b(a^2), a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, a^2b(a^2)}
        
        {a, b, a^2, a^3, a^2b(a^2), a^3b(a^3)}
      - {a, b, a^2, a^3, ab(a^3)} (7 descendants)
        
        {a, b, a^2, a^3, b(a^4), ab(a^3)}
        
        {a, b, a^2, a^3, b^2(a^3), ab(a^3)}
        
        {a, b, a^2, a^3, a^6, ab(a^3)}
        
        {a, b, a^2, a^3, ab(a^3), a^3b(a^2)}
        
        {a, b, a^2, a^3, ab(a^3), a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, ab(a^3)}
        
        {a, b, a^2, a^3, ab(a^3), a^3b(a^3)}
      - {a, b, a^2, a^3, b(a^4)} (6 descendants)
        
        {a, b, a^2, a^3, b(a^4), b^2(a^3)}
        
        {a, b, a^2, a^3, a^6, b(a^4)}
        
        {a, b, a^2, a^3, b(a^4), a^3b(a^2)}
        
        {a, b, a^2, a^3, b(a^4), a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, b(a^4)}
        
        {a, b, a^2, a^3, b(a^4), a^3b(a^3)}
      - {a, b, a^2, a^3, b^2(a^3)} (5 descendants)
        
        {a, b, a^2, a^3, a^6, b^2(a^3)}
        
        {a, b, a^2, a^3, b^2(a^3), a^3b(a^2)}
        
        {a, b, a^2, a^3, b^2(a^3), a^2b(a^3)}
        
        {a, b, a^2, a^3, a^7, b^2(a^3)}
        
        {a, b, a^2, a^3, b^2(a^3), a^3b(a^3)}
      - {a, b, a^2, a^3, a^6} (4 descendants)
        
        {a, b, a^2, a^3, a^6, a^3b(a^2)}
        
        {a, b, a^2, a^3, a^6, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^6, a^7}
        
        {a, b, a^2, a^3, a^6, a^3b(a^3)}
      - {a, b, a^2, a^3, a^3b(a^2)} (3 descendants)
        
        {a, b, a^2, a^3, a^2b(a^3), a^3b(a^2)}
        
        {a, b, a^2, a^3, a^7, a^3b(a^2)}
        
        {a, b, a^2, a^3, a^3b(a^2), a^3b(a^3)}
      - {a, b, a^2, a^3, a^2b(a^3)} (2 descendants)
        
        {a, b, a^2, a^3, a^7, a^2b(a^3)}
        
        {a, b, a^2, a^3, a^2b(a^3), a^3b(a^3)}
      - {a, b, a^2, a^3, a^7} (1 descendant)
        
        {a, b, a^2, a^3, a^7, a^3b(a^3)}
      - {a, b, a^2, a^3, a^3b(a^3)} (0 descendants)
    - {a, b, a^2, a^2b} (20 descendants)
      - {a, b, a^2, a^2b, aba} (21 descendants)
        
        {a, b, a^2, a(b^2), a^2b, aba}
        
        {a, b, a^2, b(a^2), a^2b, aba}
        
        {a, b, a^2, a^2b, aba, bab}
        
        {a, b, a^2, a^2b, b^2a, aba}
        
        {a, b, a^2, b^3, a^2b, aba}
        
        {a, b, a^2, a^4, a^2b, aba}
        
        {a, b, a^2, a^2b, a^3b, aba}
        
        {a, b, a^2, a^2b, aba, a^2ba}
        
        {a, b, a^2, a^2b, a^2(b^2), aba}
        
        {a, b, a^2, a^2b, aba, ab(a^2)}
        
        {a, b, a^2, b(a^3), a^2b, aba}
        
        {a, b, a^2, a^2b, b^2(a^2), aba}
        
        {a, b, a^2, a^5, a^2b, aba}
        
        {a, b, a^2, a^2b, aba, a^2b(a^2)}
        
        {a, b, a^2, a^2b, aba, a^2bab}
        
        {a, b, a^2, a^2b, aba, a^2(b^2)a}
        
        {a, b, a^2, a^2b, a^2(b^3), aba}
        
        {a, b, a^2, a^2b, aba, ab(a^2)b}
        
        {a, b, a^2, a^2b, aba, ababa}
        
        {a, b, a^2, a^2b, aba, a^2b(a^3)}
        
        {a, b, a^2, a^2b, aba, a^2(b^2)(a^2)}
      - {a, b, a^2, a(b^2), a^2b} (18 descendants)
        
        {a, b, a^2, a(b^2), b(a^2), a^2b}
        
        {a, b, a^2, a(b^2), a^2b, bab}
        
        {a, b, a^2, a(b^2), a^2b, b^2a}
        
        {a, b, a^2, b^3, a(b^2), a^2b}
        
        {a, b, a^2, a^4, a(b^2), a^2b}
        
        {a, b, a^2, a(b^2), a^2b, a^3b}
        
        {a, b, a^2, a(b^2), a^2b, a^2ba}
        
        {a, b, a^2, a(b^2), a^2b, a^2(b^2)}
        
        {a, b, a^2, a(b^2), a^2b, ab(a^2)}
        
        {a, b, a^2, a(b^2), b(a^3), a^2b}
        
        {a, b, a^2, a(b^2), a^2b, b^2(a^2)}
        
        {a, b, a^2, a^5, a(b^2), a^2b}
        
        {a, b, a^2, a(b^2), a^2b, a^2b(a^2)}
        
        {a, b, a^2, a(b^2), a^2b, a^2bab}
        
        {a, b, a^2, a(b^2), a^2b, a^2(b^2)a}
        
        {a, b, a^2, a(b^2), a^2b, a^2(b^3)}
        
        {a, b, a^2, a(b^2), a^2b, a^2b(a^3)}
        
        {a, b, a^2, a(b^2), a^2b, a^2(b^2)(a^2)}
      - {a, b, a^2, b(a^2), a^2b} (24 descendants)
        
        {a, b, a^2, b(a^2), a^2b, bab}
        
        {a, b, a^2, b(a^2), a^2b, b^2a}
        
        {a, b, a^2, b^3, b(a^2), a^2b}
        
        {a, b, a^2, a^4, b(a^2), a^2b}
        
        {a, b, a^2, b(a^2), a^2b, a^3b}
        
        {a, b, a^2, b(a^2), a^2b, a^2ba}
        
        {a, b, a^2, b(a^2), a^2b, a^2(b^2)}
        
        {a, b, a^2, b(a^2), a^2b, ab(a^2)}
        
        {a, b, a^2, b(a^2), b(a^3), a^2b}
        
        {a, b, a^2, b(a^2), a^2b, b^2(a^2)}
        
        {a, b, a^2, a^5, b(a^2), a^2b}
        
        {a, b, a^2, b(a^2), a^2b, a^2b(a^2)}
        
        {a, b, a^2, b(a^2), a^2b, a^2bab}
        
        {a, b, a^2, b(a^2), a^2b, a^2(b^2)a}
        
        {a, b, a^2, b(a^2), a^2b, a^2(b^3)}
        
        {a, b, a^2, b(a^2), a^2b, a(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), a^2b, b(a^3)b}
        
        {a, b, a^2, b(a^2), a^2b, bab(a^2)}
        
        {a, b, a^2, b(a^2), a^2b, b^3(a^2)}
        
        {a, b, a^2, b(a^2), a^2b, a^3b(a^2)}
        
        {a, b, a^2, b(a^2), a^2b, a^2b(a^3)}
        
        {a, b, a^2, b(a^2), a^2b, a^2(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), a^2b, a^2bab(a^2)}
        
        {a, b, a^2, b(a^2), a^2b, a^2(b^3)(a^2)}
      - {a, b, a^2, a^2b, bab} (17 descendants)
        
        {a, b, a^2, a^2b, b^2a, bab}
        
        {a, b, a^2, b^3, a^2b, bab}
        
        {a, b, a^2, a^4, a^2b, bab}
        
        {a, b, a^2, a^2b, a^3b, bab}
        
        {a, b, a^2, a^2b, bab, a^2ba}
        
        {a, b, a^2, a^2b, a^2(b^2), bab}
        
        {a, b, a^2, a^2b, ab(a^2), bab}
        
        {a, b, a^2, b(a^3), a^2b, bab}
        
        {a, b, a^2, a^2b, b^2(a^2), bab}
        
        {a, b, a^2, a^5, a^2b, bab}
        
        {a, b, a^2, a^2b, bab, a^2b(a^2)}
        
        {a, b, a^2, a^2b, bab, a^2bab}
        
        {a, b, a^2, a^2b, bab, a^2(b^2)a}
        
        {a, b, a^2, a^2b, a^2(b^3), bab}
        
        {a, b, a^2, a^2b, bab, babab}
        
        {a, b, a^2, a^2b, bab, a^2b(a^3)}
        
        {a, b, a^2, a^2b, bab, a^2(b^2)(a^2)}
      - {a, b, a^2, a^2b, b^2a} (16 descendants)
        
        {a, b, a^2, b^3, a^2b, b^2a}
        
        {a, b, a^2, a^4, a^2b, b^2a}
        
        {a, b, a^2, a^2b, a^3b, b^2a}
        
        {a, b, a^2, a^2b, b^2a, a^2ba}
        
        {a, b, a^2, a^2b, a^2(b^2), b^2a}
        
        {a, b, a^2, a^2b, b^2a, ab(a^2)}
        
        {a, b, a^2, b(a^3), a^2b, b^2a}
        
        {a, b, a^2, a^2b, b^2a, b^2(a^2)}
        
        {a, b, a^2, a^5, a^2b, b^2a}
        
        {a, b, a^2, a^2b, b^2a, a^2b(a^2)}
        
        {a, b, a^2, a^2b, b^2a, a^2bab}
        
        {a, b, a^2, a^2b, b^2a, a^2(b^2)a}
        
        {a, b, a^2, a^2b, a^2(b^3), b^2a}
        
        {a, b, a^2, a^2b, b^2a, b^2(a^2)b}
        
        {a, b, a^2, a^2b, b^2a, a^2b(a^3)}
        
        {a, b, a^2, a^2b, b^2a, a^2(b^2)(a^2)}
      - {a, b, a^2, b^3, a^2b} (15 descendants)
        
        {a, b, a^2, a^4, b^3, a^2b}
        
        {a, b, a^2, b^3, a^2b, a^3b}
        
        {a, b, a^2, b^3, a^2b, a^2ba}
        
        {a, b, a^2, b^3, a^2b, a^2(b^2)}
        
        {a, b, a^2, b^3, a^2b, ab(a^2)}
        
        {a, b, a^2, b^3, b(a^3), a^2b}
        
        {a, b, a^2, b^3, a^2b, b^2(a^2)}
        
        {a, b, a^2, a^5, b^3, a^2b}
        
        {a, b, a^2, b^3, a^2b, a^2b(a^2)}
        
        {a, b, a^2, b^3, a^2b, a^2bab}
        
        {a, b, a^2, b^3, a^2b, a^2(b^2)a}
        
        {a, b, a^2, b^3, a^2b, a^2(b^3)}
        
        {a, b, a^2, b^3, b^5, a^2b}
        
        {a, b, a^2, b^3, a^2b, a^2b(a^3)}
        
        {a, b, a^2, b^3, a^2b, a^2(b^2)(a^2)}
      - {a, b, a^2, a^4, a^2b} (15 descendants)
        
        {a, b, a^2, a^4, a^2b, a^3b}
        
        {a, b, a^2, a^4, a^2b, a^2ba}
        
        {a, b, a^2, a^4, a^2b, a^2(b^2)}
        
        {a, b, a^2, a^4, a^2b, ab(a^2)}
        
        {a, b, a^2, a^4, b(a^3), a^2b}
        
        {a, b, a^2, a^4, a^2b, b^2(a^2)}
        
        {a, b, a^2, a^4, a^5, a^2b}
        
        {a, b, a^2, a^4, a^2b, a^2b(a^2)}
        
        {a, b, a^2, a^4, a^2b, a^2bab}
        
        {a, b, a^2, a^4, a^2b, a^2(b^2)a}
        
        {a, b, a^2, a^4, a^2b, a^2(b^3)}
        
        {a, b, a^2, a^4, a^2b, a^5b}
        
        {a, b, a^2, a^4, a^2b, a^2b(a^3)}
        
        {a, b, a^2, a^4, a^2b, a^2(b^2)(a^2)}
        
        {a, b, a^2, a^4, a^7, a^2b}
      - {a, b, a^2, a^2b, a^3b} (12 descendants)
        
        {a, b, a^2, a^2b, a^3b, a^2ba}
        
        {a, b, a^2, a^2b, a^2(b^2), a^3b}
        
        {a, b, a^2, a^2b, a^3b, ab(a^2)}
        
        {a, b, a^2, b(a^3), a^2b, a^3b}
        
        {a, b, a^2, a^2b, a^3b, b^2(a^2)}
        
        {a, b, a^2, a^5, a^2b, a^3b}
        
        {a, b, a^2, a^2b, a^3b, a^2b(a^2)}
        
        {a, b, a^2, a^2b, a^3b, a^2bab}
        
        {a, b, a^2, a^2b, a^3b, a^2(b^2)a}
        
        {a, b, a^2, a^2b, a^2(b^3), a^3b}
        
        {a, b, a^2, a^2b, a^3b, a^2b(a^3)}
        
        {a, b, a^2, a^2b, a^3b, a^2(b^2)(a^2)}
      - {a, b, a^2, a^2b, a^2ba} (16 descendants)
        
        {a, b, a^2, a^2b, a^2(b^2), a^2ba}
        
        {a, b, a^2, a^2b, ab(a^2), a^2ba}
        
        {a, b, a^2, b(a^3), a^2b, a^2ba}
        
        {a, b, a^2, a^2b, b^2(a^2), a^2ba}
        
        {a, b, a^2, a^5, a^2b, a^2ba}
        
        {a, b, a^2, a^2b, a^2ba, a^2b(a^2)}
        
        {a, b, a^2, a^2b, a^2ba, a^2bab}
        
        {a, b, a^2, a^2b, a^2ba, a^2(b^2)a}
        
        {a, b, a^2, a^2b, a^2(b^3), a^2ba}
        
        {a, b, a^2, a^2b, a^2ba, a^2b(a^3)}
        
        {a, b, a^2, a^2b, a^2ba, a^2b(a^2)b}
        
        {a, b, a^2, a^2b, a^2ba, a^2baba}
        
        {a, b, a^2, a^2b, a^2ba, a^2ba(b^2)}
        
        {a, b, a^2, a^2b, a^2ba, a^2(b^2)(a^2)}
        
        {a, b, a^2, a^2b, a^2ba, a^2b(a^4)}
        
        {a, b, a^2, a^2b, a^2ba, a^2bab(a^2)}
      - {a, b, a^2, a^2b, a^2(b^2)} (15 descendants)
        
        {a, b, a^2, a^2b, a^2(b^2), ab(a^2)}
        
        {a, b, a^2, b(a^3), a^2b, a^2(b^2)}
        
        {a, b, a^2, a^2b, a^2(b^2), b^2(a^2)}
        
        {a, b, a^2, a^5, a^2b, a^2(b^2)}
        
        {a, b, a^2, a^2b, a^2(b^2), a^2b(a^2)}
        
        {a, b, a^2, a^2b, a^2(b^2), a^2bab}
        
        {a, b, a^2, a^2b, a^2(b^2), a^2(b^2)a}
        
        {a, b, a^2, a^2b, a^2(b^2), a^2(b^3)}
        
        {a, b, a^2, a^2b, a^2(b^2), a^2b(a^3)}
        
        {a, b, a^2, a^2b, a^2(b^2), a^2(b^2)(a^2)}
        
        {a, b, a^2, a^2b, a^2(b^2), a^2(b^2)ab}
        
        {a, b, a^2, a^2b, a^2(b^2), a^2(b^3)a}
        
        {a, b, a^2, a^2b, a^2(b^2), a^2(b^4)}
        
        {a, b, a^2, a^2b, a^2(b^2), a^2(b^2)(a^3)}
        
        {a, b, a^2, a^2b, a^2(b^2), a^2(b^3)(a^2)}
      - {a, b, a^2, a^2b, ab(a^2)} (9 descendants)
        
        {a, b, a^2, b(a^3), a^2b, ab(a^2)}
        
        {a, b, a^2, a^2b, b^2(a^2), ab(a^2)}
        
        {a, b, a^2, a^5, a^2b, ab(a^2)}
        
        {a, b, a^2, a^2b, ab(a^2), a^2b(a^2)}
        
        {a, b, a^2, a^2b, ab(a^2), a^2bab}
        
        {a, b, a^2, a^2b, ab(a^2), a^2(b^2)a}
        
        {a, b, a^2, a^2b, a^2(b^3), ab(a^2)}
        
        {a, b, a^2, a^2b, ab(a^2), a^2b(a^3)}
        
        {a, b, a^2, a^2b, ab(a^2), a^2(b^2)(a^2)}
      - {a, b, a^2, b(a^3), a^2b} (8 descendants)
        
        {a, b, a^2, b(a^3), a^2b, b^2(a^2)}
        
        {a, b, a^2, a^5, b(a^3), a^2b}
        
        {a, b, a^2, b(a^3), a^2b, a^2b(a^2)}
        
        {a, b, a^2, b(a^3), a^2b, a^2bab}
        
        {a, b, a^2, b(a^3), a^2b, a^2(b^2)a}
        
        {a, b, a^2, b(a^3), a^2b, a^2(b^3)}
        
        {a, b, a^2, b(a^3), a^2b, a^2b(a^3)}
        
        {a, b, a^2, b(a^3), a^2b, a^2(b^2)(a^2)}
      - {a, b, a^2, a^2b, b^2(a^2)} (7 descendants)
        
        {a, b, a^2, a^5, a^2b, b^2(a^2)}
        
        {a, b, a^2, a^2b, b^2(a^2), a^2b(a^2)}
        
        {a, b, a^2, a^2b, b^2(a^2), a^2bab}
        
        {a, b, a^2, a^2b, b^2(a^2), a^2(b^2)a}
        
        {a, b, a^2, a^2b, a^2(b^3), b^2(a^2)}
        
        {a, b, a^2, a^2b, b^2(a^2), a^2b(a^3)}
        
        {a, b, a^2, a^2b, b^2(a^2), a^2(b^2)(a^2)}
      - {a, b, a^2, a^5, a^2b} (6 descendants)
        
        {a, b, a^2, a^5, a^2b, a^2b(a^2)}
        
        {a, b, a^2, a^5, a^2b, a^2bab}
        
        {a, b, a^2, a^5, a^2b, a^2(b^2)a}
        
        {a, b, a^2, a^5, a^2b, a^2(b^3)}
        
        {a, b, a^2, a^5, a^2b, a^2b(a^3)}
        
        {a, b, a^2, a^5, a^2b, a^2(b^2)(a^2)}
      - {a, b, a^2, a^2b, a^2b(a^2)} (6 descendants)
        
        {a, b, a^2, a^2b, a^2b(a^2), a^2bab}
        
        {a, b, a^2, a^2b, a^2b(a^2), a^2(b^2)a}
        
        {a, b, a^2, a^2b, a^2(b^3), a^2b(a^2)}
        
        {a, b, a^2, a^2b, a^2b(a^2), a^2b(a^3)}
        
        {a, b, a^2, a^2b, a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, b, a^2, a^2b, a^2b(a^2), a^2b(a^3)b}
      - {a, b, a^2, a^2b, a^2bab} (4 descendants)
        
        {a, b, a^2, a^2b, a^2(b^2)a, a^2bab}
        
        {a, b, a^2, a^2b, a^2(b^3), a^2bab}
        
        {a, b, a^2, a^2b, a^2b(a^3), a^2bab}
        
        {a, b, a^2, a^2b, a^2(b^2)(a^2), a^2bab}
      - {a, b, a^2, a^2b, a^2(b^2)a} (4 descendants)
        
        {a, b, a^2, a^2b, a^2(b^3), a^2(b^2)a}
        
        {a, b, a^2, a^2b, a^2b(a^3), a^2(b^2)a}
        
        {a, b, a^2, a^2b, a^2(b^2)a, a^2(b^2)(a^2)}
        
        {a, b, a^2, a^2b, a^2(b^2)a, a^2(b^2)(a^2)b}
      - {a, b, a^2, a^2b, a^2(b^3)} (2 descendants)
        
        {a, b, a^2, a^2b, a^2(b^3), a^2b(a^3)}
        
        {a, b, a^2, a^2b, a^2(b^3), a^2(b^2)(a^2)}
      - {a, b, a^2, a^2b, a^2b(a^3)} (1 descendant)
        
        {a, b, a^2, a^2b, a^2b(a^3), a^2(b^2)(a^2)}
      - {a, b, a^2, a^2b, a^2(b^2)(a^2)} (0 descendants)
    - {a, b, a^2, aba} (15 descendants)
      - {a, b, a^2, a(b^2), aba} (15 descendants)
        
        {a, b, a^2, a(b^2), b(a^2), aba}
        
        {a, b, a^2, a(b^2), aba, bab}
        
        {a, b, a^2, a(b^2), b^2a, aba}
        
        {a, b, a^2, b^3, a(b^2), aba}
        
        {a, b, a^2, a^4, a(b^2), aba}
        
        {a, b, a^2, a(b^2), a^3b, aba}
        
        {a, b, a^2, a(b^2), aba, a^2ba}
        
        {a, b, a^2, a(b^2), a^2(b^2), aba}
        
        {a, b, a^2, a(b^2), aba, ab(a^2)}
        
        {a, b, a^2, a(b^2), b(a^3), aba}
        
        {a, b, a^2, a(b^2), b^2(a^2), aba}
        
        {a, b, a^2, a^5, a(b^2), aba}
        
        {a, b, a^2, a(b^2), aba, a^2b(a^2)}
        
        {a, b, a^2, a(b^2), aba, ababa}
        
        {a, b, a^2, a(b^2), aba, aba(b^2)}
      - {a, b, a^2, b(a^2), aba} (19 descendants)
        
        {a, b, a^2, b(a^2), aba, bab}
        
        {a, b, a^2, b(a^2), b^2a, aba}
        
        {a, b, a^2, b^3, b(a^2), aba}
        
        {a, b, a^2, a^4, b(a^2), aba}
        
        {a, b, a^2, b(a^2), a^3b, aba}
        
        {a, b, a^2, b(a^2), aba, a^2ba}
        
        {a, b, a^2, b(a^2), a^2(b^2), aba}
        
        {a, b, a^2, b(a^2), aba, ab(a^2)}
        
        {a, b, a^2, b(a^2), b(a^3), aba}
        
        {a, b, a^2, b(a^2), b^2(a^2), aba}
        
        {a, b, a^2, a^5, b(a^2), aba}
        
        {a, b, a^2, b(a^2), aba, a^2b(a^2)}
        
        {a, b, a^2, b(a^2), aba, ababa}
        
        {a, b, a^2, b(a^2), aba, a(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), aba, b(a^2)ba}
        
        {a, b, a^2, b(a^2), aba, bab(a^2)}
        
        {a, b, a^2, b(a^2), b^3(a^2), aba}
        
        {a, b, a^2, b(a^2), aba, a^3b(a^2)}
        
        {a, b, a^2, b(a^2), aba, a^2(b^2)(a^2)}
      - {a, b, a^2, aba, bab} (13 descendants)
        
        {a, b, a^2, b^2a, aba, bab}
        
        {a, b, a^2, b^3, aba, bab}
        
        {a, b, a^2, a^4, aba, bab}
        
        {a, b, a^2, a^3b, aba, bab}
        
        {a, b, a^2, aba, bab, a^2ba}
        
        {a, b, a^2, a^2(b^2), aba, bab}
        
        {a, b, a^2, aba, ab(a^2), bab}
        
        {a, b, a^2, b(a^3), aba, bab}
        
        {a, b, a^2, b^2(a^2), aba, bab}
        
        {a, b, a^2, a^5, aba, bab}
        
        {a, b, a^2, aba, bab, a^2b(a^2)}
        
        {a, b, a^2, aba, bab, ababa}
        
        {a, b, a^2, aba, bab, babab}
      - {a, b, a^2, b^2a, aba} (12 descendants)
        
        {a, b, a^2, b^3, b^2a, aba}
        
        {a, b, a^2, a^4, b^2a, aba}
        
        {a, b, a^2, a^3b, b^2a, aba}
        
        {a, b, a^2, b^2a, aba, a^2ba}
        
        {a, b, a^2, a^2(b^2), b^2a, aba}
        
        {a, b, a^2, b^2a, aba, ab(a^2)}
        
        {a, b, a^2, b(a^3), b^2a, aba}
        
        {a, b, a^2, b^2a, b^2(a^2), aba}
        
        {a, b, a^2, a^5, b^2a, aba}
        
        {a, b, a^2, b^2a, aba, a^2b(a^2)}
        
        {a, b, a^2, b^2a, aba, ababa}
        
        {a, b, a^2, b^2a, aba, b^2aba}
      - {a, b, a^2, b^3, aba} (11 descendants)
        
        {a, b, a^2, a^4, b^3, aba}
        
        {a, b, a^2, b^3, a^3b, aba}
        
        {a, b, a^2, b^3, aba, a^2ba}
        
        {a, b, a^2, b^3, a^2(b^2), aba}
        
        {a, b, a^2, b^3, aba, ab(a^2)}
        
        {a, b, a^2, b^3, b(a^3), aba}
        
        {a, b, a^2, b^3, b^2(a^2), aba}
        
        {a, b, a^2, a^5, b^3, aba}
        
        {a, b, a^2, b^3, aba, a^2b(a^2)}
        
        {a, b, a^2, b^3, aba, ababa}
        
        {a, b, a^2, b^3, b^5, aba}
      - {a, b, a^2, a^4, aba} (12 descendants)
        
        {a, b, a^2, a^4, a^3b, aba}
        
        {a, b, a^2, a^4, aba, a^2ba}
        
        {a, b, a^2, a^4, a^2(b^2), aba}
        
        {a, b, a^2, a^4, aba, ab(a^2)}
        
        {a, b, a^2, a^4, b(a^3), aba}
        
        {a, b, a^2, a^4, b^2(a^2), aba}
        
        {a, b, a^2, a^4, a^5, aba}
        
        {a, b, a^2, a^4, aba, a^2b(a^2)}
        
        {a, b, a^2, a^4, aba, ababa}
        
        {a, b, a^2, a^4, aba, a^4ba}
        
        {a, b, a^2, a^4, aba, ab(a^4)}
        
        {a, b, a^2, a^4, a^7, aba}
      - {a, b, a^2, a^3b, aba} (8 descendants)
        
        {a, b, a^2, a^3b, aba, a^2ba}
        
        {a, b, a^2, a^2(b^2), a^3b, aba}
        
        {a, b, a^2, a^3b, aba, ab(a^2)}
        
        {a, b, a^2, b(a^3), a^3b, aba}
        
        {a, b, a^2, a^3b, b^2(a^2), aba}
        
        {a, b, a^2, a^5, a^3b, aba}
        
        {a, b, a^2, a^3b, aba, a^2b(a^2)}
        
        {a, b, a^2, a^3b, aba, ababa}
      - {a, b, a^2, aba, a^2ba} (8 descendants)
        
        {a, b, a^2, a^2(b^2), aba, a^2ba}
        
        {a, b, a^2, aba, ab(a^2), a^2ba}
        
        {a, b, a^2, b(a^3), aba, a^2ba}
        
        {a, b, a^2, b^2(a^2), aba, a^2ba}
        
        {a, b, a^2, a^5, aba, a^2ba}
        
        {a, b, a^2, aba, a^2ba, a^2b(a^2)}
        
        {a, b, a^2, aba, a^2ba, ababa}
        
        {a, b, a^2, aba, a^2ba, a^2baba}
      - {a, b, a^2, a^2(b^2), aba} (6 descendants)
        
        {a, b, a^2, a^2(b^2), aba, ab(a^2)}
        
        {a, b, a^2, b(a^3), a^2(b^2), aba}
        
        {a, b, a^2, a^2(b^2), b^2(a^2), aba}
        
        {a, b, a^2, a^5, a^2(b^2), aba}
        
        {a, b, a^2, a^2(b^2), aba, a^2b(a^2)}
        
        {a, b, a^2, a^2(b^2), aba, ababa}
      - {a, b, a^2, aba, ab(a^2)} (6 descendants)
        
        {a, b, a^2, b(a^3), aba, ab(a^2)}
        
        {a, b, a^2, b^2(a^2), aba, ab(a^2)}
        
        {a, b, a^2, a^5, aba, ab(a^2)}
        
        {a, b, a^2, aba, ab(a^2), a^2b(a^2)}
        
        {a, b, a^2, aba, ab(a^2), ababa}
        
        {a, b, a^2, aba, ab(a^2), abab(a^2)}
      - {a, b, a^2, b(a^3), aba} (4 descendants)
        
        {a, b, a^2, b(a^3), b^2(a^2), aba}
        
        {a, b, a^2, a^5, b(a^3), aba}
        
        {a, b, a^2, b(a^3), aba, a^2b(a^2)}
        
        {a, b, a^2, b(a^3), aba, ababa}
      - {a, b, a^2, b^2(a^2), aba} (3 descendants)
        
        {a, b, a^2, a^5, b^2(a^2), aba}
        
        {a, b, a^2, b^2(a^2), aba, a^2b(a^2)}
        
        {a, b, a^2, b^2(a^2), aba, ababa}
      - {a, b, a^2, a^5, aba} (2 descendants)
        
        {a, b, a^2, a^5, aba, a^2b(a^2)}
        
        {a, b, a^2, a^5, aba, ababa}
      - {a, b, a^2, aba, a^2b(a^2)} (1 descendant)
        
        {a, b, a^2, aba, a^2b(a^2), ababa}
      - {a, b, a^2, aba, ababa} (1 descendant)
        
        {a, b, a^2, aba, ababa, abababa}
    - {a, b, a^2, a(b^2)} (13 descendants)
      - {a, b, a^2, a(b^2), b(a^2)} (18 descendants)
        
        {a, b, a^2, a(b^2), b(a^2), bab}
        
        {a, b, a^2, a(b^2), b(a^2), b^2a}
        
        {a, b, a^2, b^3, a(b^2), b(a^2)}
        
        {a, b, a^2, a^4, a(b^2), b(a^2)}
        
        {a, b, a^2, a(b^2), b(a^2), a^3b}
        
        {a, b, a^2, a(b^2), b(a^2), a^2ba}
        
        {a, b, a^2, a(b^2), b(a^2), a^2(b^2)}
        
        {a, b, a^2, a(b^2), b(a^2), ab(a^2)}
        
        {a, b, a^2, a(b^2), b(a^2), b(a^3)}
        
        {a, b, a^2, a(b^2), b(a^2), b^2(a^2)}
        
        {a, b, a^2, a^5, a(b^2), b(a^2)}
        
        {a, b, a^2, a(b^2), b(a^2), a^2b(a^2)}
        
        {a, b, a^2, a(b^2), b(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, a(b^2), b(a^2), b(a^2)(b^2)}
        
        {a, b, a^2, a(b^2), b(a^2), bab(a^2)}
        
        {a, b, a^2, a(b^2), b(a^2), b^3(a^2)}
        
        {a, b, a^2, a(b^2), b(a^2), a^3b(a^2)}
        
        {a, b, a^2, a(b^2), b(a^2), a^2(b^2)(a^2)}
      - {a, b, a^2, a(b^2), bab} (13 descendants)
        
        {a, b, a^2, a(b^2), b^2a, bab}
        
        {a, b, a^2, b^3, a(b^2), bab}
        
        {a, b, a^2, a^4, a(b^2), bab}
        
        {a, b, a^2, a(b^2), a^3b, bab}
        
        {a, b, a^2, a(b^2), bab, a^2ba}
        
        {a, b, a^2, a(b^2), a^2(b^2), bab}
        
        {a, b, a^2, a(b^2), ab(a^2), bab}
        
        {a, b, a^2, a(b^2), b(a^3), bab}
        
        {a, b, a^2, a(b^2), b^2(a^2), bab}
        
        {a, b, a^2, a^5, a(b^2), bab}
        
        {a, b, a^2, a(b^2), bab, a^2b(a^2)}
        
        {a, b, a^2, a(b^2), bab, a(b^2)ab}
        
        {a, b, a^2, a(b^2), bab, babab}
      - {a, b, a^2, a(b^2), b^2a} (12 descendants)
        
        {a, b, a^2, b^3, a(b^2), b^2a}
        
        {a, b, a^2, a^4, a(b^2), b^2a}
        
        {a, b, a^2, a(b^2), a^3b, b^2a}
        
        {a, b, a^2, a(b^2), b^2a, a^2ba}
        
        {a, b, a^2, a(b^2), a^2(b^2), b^2a}
        
        {a, b, a^2, a(b^2), b^2a, ab(a^2)}
        
        {a, b, a^2, a(b^2), b(a^3), b^2a}
        
        {a, b, a^2, a(b^2), b^2a, b^2(a^2)}
        
        {a, b, a^2, a^5, a(b^2), b^2a}
        
        {a, b, a^2, a(b^2), b^2a, a^2b(a^2)}
        
        {a, b, a^2, a(b^2), b^2a, a(b^3)a}
        
        {a, b, a^2, a(b^2), b^2a, b^2a(b^2)}
      - {a, b, a^2, b^3, a(b^2)} (11 descendants)
        
        {a, b, a^2, a^4, b^3, a(b^2)}
        
        {a, b, a^2, b^3, a(b^2), a^3b}
        
        {a, b, a^2, b^3, a(b^2), a^2ba}
        
        {a, b, a^2, b^3, a(b^2), a^2(b^2)}
        
        {a, b, a^2, b^3, a(b^2), ab(a^2)}
        
        {a, b, a^2, b^3, a(b^2), b(a^3)}
        
        {a, b, a^2, b^3, a(b^2), b^2(a^2)}
        
        {a, b, a^2, a^5, b^3, a(b^2)}
        
        {a, b, a^2, b^3, a(b^2), a^2b(a^2)}
        
        {a, b, a^2, b^3, a(b^2), a(b^4)}
        
        {a, b, a^2, b^3, b^5, a(b^2)}
      - {a, b, a^2, a^4, a(b^2)} (10 descendants)
        
        {a, b, a^2, a^4, a(b^2), a^3b}
        
        {a, b, a^2, a^4, a(b^2), a^2ba}
        
        {a, b, a^2, a^4, a(b^2), a^2(b^2)}
        
        {a, b, a^2, a^4, a(b^2), ab(a^2)}
        
        {a, b, a^2, a^4, a(b^2), b(a^3)}
        
        {a, b, a^2, a^4, a(b^2), b^2(a^2)}
        
        {a, b, a^2, a^4, a^5, a(b^2)}
        
        {a, b, a^2, a^4, a(b^2), a^2b(a^2)}
        
        {a, b, a^2, a^4, a(b^2), a^4(b^2)}
        
        {a, b, a^2, a^4, a^7, a(b^2)}
      - {a, b, a^2, a(b^2), a^3b} (7 descendants)
        
        {a, b, a^2, a(b^2), a^3b, a^2ba}
        
        {a, b, a^2, a(b^2), a^2(b^2), a^3b}
        
        {a, b, a^2, a(b^2), a^3b, ab(a^2)}
        
        {a, b, a^2, a(b^2), b(a^3), a^3b}
        
        {a, b, a^2, a(b^2), a^3b, b^2(a^2)}
        
        {a, b, a^2, a^5, a(b^2), a^3b}
        
        {a, b, a^2, a(b^2), a^3b, a^2b(a^2)}
      - {a, b, a^2, a(b^2), a^2ba} (7 descendants)
        
        {a, b, a^2, a(b^2), a^2(b^2), a^2ba}
        
        {a, b, a^2, a(b^2), ab(a^2), a^2ba}
        
        {a, b, a^2, a(b^2), b(a^3), a^2ba}
        
        {a, b, a^2, a(b^2), b^2(a^2), a^2ba}
        
        {a, b, a^2, a^5, a(b^2), a^2ba}
        
        {a, b, a^2, a(b^2), a^2ba, a^2b(a^2)}
        
        {a, b, a^2, a(b^2), a^2ba, a^2ba(b^2)}
      - {a, b, a^2, a(b^2), a^2(b^2)} (5 descendants)
        
        {a, b, a^2, a(b^2), a^2(b^2), ab(a^2)}
        
        {a, b, a^2, a(b^2), b(a^3), a^2(b^2)}
        
        {a, b, a^2, a(b^2), a^2(b^2), b^2(a^2)}
        
        {a, b, a^2, a^5, a(b^2), a^2(b^2)}
        
        {a, b, a^2, a(b^2), a^2(b^2), a^2b(a^2)}
      - {a, b, a^2, a(b^2), ab(a^2)} (4 descendants)
        
        {a, b, a^2, a(b^2), b(a^3), ab(a^2)}
        
        {a, b, a^2, a(b^2), b^2(a^2), ab(a^2)}
        
        {a, b, a^2, a^5, a(b^2), ab(a^2)}
        
        {a, b, a^2, a(b^2), ab(a^2), a^2b(a^2)}
      - {a, b, a^2, a(b^2), b(a^3)} (4 descendants)
        
        {a, b, a^2, a(b^2), b(a^3), b^2(a^2)}
        
        {a, b, a^2, a^5, a(b^2), b(a^3)}
        
        {a, b, a^2, a(b^2), b(a^3), a^2b(a^2)}
        
        {a, b, a^2, a(b^2), b(a^3), a(b^2)(a^3)}
      - {a, b, a^2, a(b^2), b^2(a^2)} (3 descendants)
        
        {a, b, a^2, a^5, a(b^2), b^2(a^2)}
        
        {a, b, a^2, a(b^2), b^2(a^2), a^2b(a^2)}
        
        {a, b, a^2, a(b^2), b^2(a^2), a(b^3)(a^2)}
      - {a, b, a^2, a^5, a(b^2)} (1 descendant)
        
        {a, b, a^2, a^5, a(b^2), a^2b(a^2)}
      - {a, b, a^2, a(b^2), a^2b(a^2)} (0 descendants)
    - {a, b, a^2, b(a^2)} (17 descendants)
      - {a, b, a^2, b(a^2), bab} (17 descendants)
        
        {a, b, a^2, b(a^2), b^2a, bab}
        
        {a, b, a^2, b^3, b(a^2), bab}
        
        {a, b, a^2, a^4, b(a^2), bab}
        
        {a, b, a^2, b(a^2), a^3b, bab}
        
        {a, b, a^2, b(a^2), bab, a^2ba}
        
        {a, b, a^2, b(a^2), a^2(b^2), bab}
        
        {a, b, a^2, b(a^2), ab(a^2), bab}
        
        {a, b, a^2, b(a^2), b(a^3), bab}
        
        {a, b, a^2, b(a^2), b^2(a^2), bab}
        
        {a, b, a^2, a^5, b(a^2), bab}
        
        {a, b, a^2, b(a^2), bab, a^2b(a^2)}
        
        {a, b, a^2, b(a^2), a(b^2)(a^2), bab}
        
        {a, b, a^2, b(a^2), bab, bab(a^2)}
        
        {a, b, a^2, b(a^2), bab, babab}
        
        {a, b, a^2, b(a^2), b^3(a^2), bab}
        
        {a, b, a^2, b(a^2), bab, a^3b(a^2)}
        
        {a, b, a^2, b(a^2), bab, a^2(b^2)(a^2)}
      - {a, b, a^2, b(a^2), b^2a} (15 descendants)
        
        {a, b, a^2, b^3, b(a^2), b^2a}
        
        {a, b, a^2, a^4, b(a^2), b^2a}
        
        {a, b, a^2, b(a^2), a^3b, b^2a}
        
        {a, b, a^2, b(a^2), b^2a, a^2ba}
        
        {a, b, a^2, b(a^2), a^2(b^2), b^2a}
        
        {a, b, a^2, b(a^2), b^2a, ab(a^2)}
        
        {a, b, a^2, b(a^2), b(a^3), b^2a}
        
        {a, b, a^2, b(a^2), b^2a, b^2(a^2)}
        
        {a, b, a^2, a^5, b(a^2), b^2a}
        
        {a, b, a^2, b(a^2), b^2a, a^2b(a^2)}
        
        {a, b, a^2, b(a^2), b^2a, a(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), b^2a, bab(a^2)}
        
        {a, b, a^2, b(a^2), b^2a, b^3(a^2)}
        
        {a, b, a^2, b(a^2), b^2a, a^3b(a^2)}
        
        {a, b, a^2, b(a^2), b^2a, a^2(b^2)(a^2)}
      - {a, b, a^2, b^3, b(a^2)} (15 descendants)
        
        {a, b, a^2, a^4, b^3, b(a^2)}
        
        {a, b, a^2, b^3, b(a^2), a^3b}
        
        {a, b, a^2, b^3, b(a^2), a^2ba}
        
        {a, b, a^2, b^3, b(a^2), a^2(b^2)}
        
        {a, b, a^2, b^3, b(a^2), ab(a^2)}
        
        {a, b, a^2, b^3, b(a^2), b(a^3)}
        
        {a, b, a^2, b^3, b(a^2), b^2(a^2)}
        
        {a, b, a^2, a^5, b^3, b(a^2)}
        
        {a, b, a^2, b^3, b(a^2), a^2b(a^2)}
        
        {a, b, a^2, b^3, b(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, b^3, b(a^2), bab(a^2)}
        
        {a, b, a^2, b^3, b(a^2), b^3(a^2)}
        
        {a, b, a^2, b^3, b^5, b(a^2)}
        
        {a, b, a^2, b^3, b(a^2), a^3b(a^2)}
        
        {a, b, a^2, b^3, b(a^2), a^2(b^2)(a^2)}
      - {a, b, a^2, a^4, b(a^2)} (15 descendants)
        
        {a, b, a^2, a^4, b(a^2), a^3b}
        
        {a, b, a^2, a^4, b(a^2), a^2ba}
        
        {a, b, a^2, a^4, b(a^2), a^2(b^2)}
        
        {a, b, a^2, a^4, b(a^2), ab(a^2)}
        
        {a, b, a^2, a^4, b(a^2), b(a^3)}
        
        {a, b, a^2, a^4, b(a^2), b^2(a^2)}
        
        {a, b, a^2, a^4, a^5, b(a^2)}
        
        {a, b, a^2, a^4, b(a^2), a^2b(a^2)}
        
        {a, b, a^2, a^4, b(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, a^4, b(a^2), bab(a^2)}
        
        {a, b, a^2, a^4, b(a^2), b^3(a^2)}
        
        {a, b, a^2, a^4, b(a^2), a^3b(a^2)}
        
        {a, b, a^2, a^4, b(a^2), a^2(b^2)(a^2)}
        
        {a, b, a^2, a^4, b(a^2), b(a^5)}
        
        {a, b, a^2, a^4, a^7, b(a^2)}
      - {a, b, a^2, b(a^2), a^3b} (12 descendants)
        
        {a, b, a^2, b(a^2), a^3b, a^2ba}
        
        {a, b, a^2, b(a^2), a^2(b^2), a^3b}
        
        {a, b, a^2, b(a^2), a^3b, ab(a^2)}
        
        {a, b, a^2, b(a^2), b(a^3), a^3b}
        
        {a, b, a^2, b(a^2), a^3b, b^2(a^2)}
        
        {a, b, a^2, a^5, b(a^2), a^3b}
        
        {a, b, a^2, b(a^2), a^3b, a^2b(a^2)}
        
        {a, b, a^2, b(a^2), a^3b, a(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), a^3b, bab(a^2)}
        
        {a, b, a^2, b(a^2), a^3b, b^3(a^2)}
        
        {a, b, a^2, b(a^2), a^3b, a^3b(a^2)}
        
        {a, b, a^2, b(a^2), a^3b, a^2(b^2)(a^2)}
      - {a, b, a^2, b(a^2), a^2ba} (11 descendants)
        
        {a, b, a^2, b(a^2), a^2(b^2), a^2ba}
        
        {a, b, a^2, b(a^2), ab(a^2), a^2ba}
        
        {a, b, a^2, b(a^2), b(a^3), a^2ba}
        
        {a, b, a^2, b(a^2), b^2(a^2), a^2ba}
        
        {a, b, a^2, a^5, b(a^2), a^2ba}
        
        {a, b, a^2, b(a^2), a^2ba, a^2b(a^2)}
        
        {a, b, a^2, b(a^2), a(b^2)(a^2), a^2ba}
        
        {a, b, a^2, b(a^2), a^2ba, bab(a^2)}
        
        {a, b, a^2, b(a^2), b^3(a^2), a^2ba}
        
        {a, b, a^2, b(a^2), a^2ba, a^3b(a^2)}
        
        {a, b, a^2, b(a^2), a^2ba, a^2(b^2)(a^2)}
      - {a, b, a^2, b(a^2), a^2(b^2)} (10 descendants)
        
        {a, b, a^2, b(a^2), a^2(b^2), ab(a^2)}
        
        {a, b, a^2, b(a^2), b(a^3), a^2(b^2)}
        
        {a, b, a^2, b(a^2), a^2(b^2), b^2(a^2)}
        
        {a, b, a^2, a^5, b(a^2), a^2(b^2)}
        
        {a, b, a^2, b(a^2), a^2(b^2), a^2b(a^2)}
        
        {a, b, a^2, b(a^2), a^2(b^2), a(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), a^2(b^2), bab(a^2)}
        
        {a, b, a^2, b(a^2), a^2(b^2), b^3(a^2)}
        
        {a, b, a^2, b(a^2), a^2(b^2), a^3b(a^2)}
        
        {a, b, a^2, b(a^2), a^2(b^2), a^2(b^2)(a^2)}
      - {a, b, a^2, b(a^2), ab(a^2)} (14 descendants)
        
        {a, b, a^2, b(a^2), b(a^3), ab(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), ab(a^2)}
        
        {a, b, a^2, a^5, b(a^2), ab(a^2)}
        
        {a, b, a^2, b(a^2), ab(a^2), a^2b(a^2)}
        
        {a, b, a^2, b(a^2), ab(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), ab(a^2), bab(a^2)}
        
        {a, b, a^2, b(a^2), b^3(a^2), ab(a^2)}
        
        {a, b, a^2, b(a^2), ab(a^2), a^3b(a^2)}
        
        {a, b, a^2, b(a^2), ab(a^2), a^2(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), ab(a^2), abab(a^2)}
        
        {a, b, a^2, b(a^2), ab(a^2), b(a^2)b(a^2)}
        
        {a, b, a^2, b(a^2), ab(a^2), b^2ab(a^2)}
        
        {a, b, a^2, b(a^2), ab(a^2), a^4b(a^2)}
        
        {a, b, a^2, b(a^2), ab(a^2), a^2bab(a^2)}
      - {a, b, a^2, b(a^2), b(a^3)} (8 descendants)
        
        {a, b, a^2, b(a^2), b(a^3), b^2(a^2)}
        
        {a, b, a^2, a^5, b(a^2), b(a^3)}
        
        {a, b, a^2, b(a^2), b(a^3), a^2b(a^2)}
        
        {a, b, a^2, b(a^2), b(a^3), a(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), b(a^3), bab(a^2)}
        
        {a, b, a^2, b(a^2), b(a^3), b^3(a^2)}
        
        {a, b, a^2, b(a^2), b(a^3), a^3b(a^2)}
        
        {a, b, a^2, b(a^2), b(a^3), a^2(b^2)(a^2)}
      - {a, b, a^2, b(a^2), b^2(a^2)} (12 descendants)
        
        {a, b, a^2, a^5, b(a^2), b^2(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), a^2b(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), bab(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), b^3(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), a^3b(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), a^2(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), a(b^3)(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), ba(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), b^4(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), a^3(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), b^2(a^2), a^2(b^3)(a^2)}
      - {a, b, a^2, a^5, b(a^2)} (6 descendants)
        
        {a, b, a^2, a^5, b(a^2), a^2b(a^2)}
        
        {a, b, a^2, a^5, b(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, a^5, b(a^2), bab(a^2)}
        
        {a, b, a^2, a^5, b(a^2), b^3(a^2)}
        
        {a, b, a^2, a^5, b(a^2), a^3b(a^2)}
        
        {a, b, a^2, a^5, b(a^2), a^2(b^2)(a^2)}
      - {a, b, a^2, b(a^2), a^2b(a^2)} (6 descendants)
        
        {a, b, a^2, b(a^2), a(b^2)(a^2), a^2b(a^2)}
        
        {a, b, a^2, b(a^2), a^2b(a^2), bab(a^2)}
        
        {a, b, a^2, b(a^2), b^3(a^2), a^2b(a^2)}
        
        {a, b, a^2, b(a^2), a^2b(a^2), a^3b(a^2)}
        
        {a, b, a^2, b(a^2), a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), a^2b(a^2), b(a^3)b(a^2)}
      - {a, b, a^2, b(a^2), a(b^2)(a^2)} (5 descendants)
        
        {a, b, a^2, b(a^2), a(b^2)(a^2), bab(a^2)}
        
        {a, b, a^2, b(a^2), b^3(a^2), a(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), a(b^2)(a^2), a^3b(a^2)}
        
        {a, b, a^2, b(a^2), a(b^2)(a^2), a^2(b^2)(a^2)}
        
        {a, b, a^2, b(a^2), a(b^2)(a^2), b(a^2)(b^2)(a^2)}
      - {a, b, a^2, b(a^2), bab(a^2)} (3 descendants)
        
        {a, b, a^2, b(a^2), b^3(a^2), bab(a^2)}
        
        {a, b, a^2, b(a^2), a^3b(a^2), bab(a^2)}
        
        {a, b, a^2, b(a^2), a^2(b^2)(a^2), bab(a^2)}
      - {a, b, a^2, b(a^2), b^3(a^2)} (2 descendants)
        
        {a, b, a^2, b(a^2), b^3(a^2), a^3b(a^2)}
        
        {a, b, a^2, b(a^2), b^3(a^2), a^2(b^2)(a^2)}
      - {a, b, a^2, b(a^2), a^3b(a^2)} (1 descendant)
        
        {a, b, a^2, b(a^2), a^2(b^2)(a^2), a^3b(a^2)}
      - {a, b, a^2, b(a^2), a^2(b^2)(a^2)} (0 descendants)
    - {a, b, a^2, bab} (12 descendants)
      - {a, b, a^2, b^2a, bab} (12 descendants)
        
        {a, b, a^2, b^3, b^2a, bab}
        
        {a, b, a^2, a^4, b^2a, bab}
        
        {a, b, a^2, a^3b, b^2a, bab}
        
        {a, b, a^2, b^2a, bab, a^2ba}
        
        {a, b, a^2, a^2(b^2), b^2a, bab}
        
        {a, b, a^2, b^2a, ab(a^2), bab}
        
        {a, b, a^2, b(a^3), b^2a, bab}
        
        {a, b, a^2, b^2a, b^2(a^2), bab}
        
        {a, b, a^2, a^5, b^2a, bab}
        
        {a, b, a^2, b^2a, bab, a^2b(a^2)}
        
        {a, b, a^2, b^2a, bab, babab}
        
        {a, b, a^2, b^2a, bab, ba(b^2)a}
      - {a, b, a^2, b^3, bab} (13 descendants)
        
        {a, b, a^2, a^4, b^3, bab}
        
        {a, b, a^2, b^3, a^3b, bab}
        
        {a, b, a^2, b^3, bab, a^2ba}
        
        {a, b, a^2, b^3, a^2(b^2), bab}
        
        {a, b, a^2, b^3, ab(a^2), bab}
        
        {a, b, a^2, b^3, b(a^3), bab}
        
        {a, b, a^2, b^3, b^2(a^2), bab}
        
        {a, b, a^2, a^5, b^3, bab}
        
        {a, b, a^2, b^3, bab, a^2b(a^2)}
        
        {a, b, a^2, b^3, bab, babab}
        
        {a, b, a^2, b^3, bab, ba(b^3)}
        
        {a, b, a^2, b^3, bab, b^3ab}
        
        {a, b, a^2, b^3, b^5, bab}
      - {a, b, a^2, a^4, bab} (10 descendants)
        
        {a, b, a^2, a^4, a^3b, bab}
        
        {a, b, a^2, a^4, bab, a^2ba}
        
        {a, b, a^2, a^4, a^2(b^2), bab}
        
        {a, b, a^2, a^4, ab(a^2), bab}
        
        {a, b, a^2, a^4, b(a^3), bab}
        
        {a, b, a^2, a^4, b^2(a^2), bab}
        
        {a, b, a^2, a^4, a^5, bab}
        
        {a, b, a^2, a^4, bab, a^2b(a^2)}
        
        {a, b, a^2, a^4, bab, babab}
        
        {a, b, a^2, a^4, a^7, bab}
      - {a, b, a^2, a^3b, bab} (9 descendants)
        
        {a, b, a^2, a^3b, bab, a^2ba}
        
        {a, b, a^2, a^2(b^2), a^3b, bab}
        
        {a, b, a^2, a^3b, ab(a^2), bab}
        
        {a, b, a^2, b(a^3), a^3b, bab}
        
        {a, b, a^2, a^3b, b^2(a^2), bab}
        
        {a, b, a^2, a^5, a^3b, bab}
        
        {a, b, a^2, a^3b, bab, a^2b(a^2)}
        
        {a, b, a^2, a^3b, bab, babab}
        
        {a, b, a^2, a^3b, bab, a^3bab}
      - {a, b, a^2, bab, a^2ba} (7 descendants)
        
        {a, b, a^2, a^2(b^2), bab, a^2ba}
        
        {a, b, a^2, ab(a^2), bab, a^2ba}
        
        {a, b, a^2, b(a^3), bab, a^2ba}
        
        {a, b, a^2, b^2(a^2), bab, a^2ba}
        
        {a, b, a^2, a^5, bab, a^2ba}
        
        {a, b, a^2, bab, a^2ba, a^2b(a^2)}
        
        {a, b, a^2, bab, a^2ba, babab}
      - {a, b, a^2, a^2(b^2), bab} (7 descendants)
        
        {a, b, a^2, a^2(b^2), ab(a^2), bab}
        
        {a, b, a^2, b(a^3), a^2(b^2), bab}
        
        {a, b, a^2, a^2(b^2), b^2(a^2), bab}
        
        {a, b, a^2, a^5, a^2(b^2), bab}
        
        {a, b, a^2, a^2(b^2), bab, a^2b(a^2)}
        
        {a, b, a^2, a^2(b^2), bab, babab}
        
        {a, b, a^2, a^2(b^2), bab, a^2(b^2)ab}
      - {a, b, a^2, ab(a^2), bab} (5 descendants)
        
        {a, b, a^2, b(a^3), ab(a^2), bab}
        
        {a, b, a^2, b^2(a^2), ab(a^2), bab}
        
        {a, b, a^2, a^5, ab(a^2), bab}
        
        {a, b, a^2, ab(a^2), bab, a^2b(a^2)}
        
        {a, b, a^2, ab(a^2), bab, babab}
      - {a, b, a^2, b(a^3), bab} (5 descendants)
        
        {a, b, a^2, b(a^3), b^2(a^2), bab}
        
        {a, b, a^2, a^5, b(a^3), bab}
        
        {a, b, a^2, b(a^3), bab, a^2b(a^2)}
        
        {a, b, a^2, b(a^3), bab, babab}
        
        {a, b, a^2, b(a^3), bab, bab(a^3)}
      - {a, b, a^2, b^2(a^2), bab} (4 descendants)
        
        {a, b, a^2, a^5, b^2(a^2), bab}
        
        {a, b, a^2, b^2(a^2), bab, a^2b(a^2)}
        
        {a, b, a^2, b^2(a^2), bab, babab}
        
        {a, b, a^2, b^2(a^2), bab, ba(b^2)(a^2)}
      - {a, b, a^2, a^5, bab} (2 descendants)
        
        {a, b, a^2, a^5, bab, a^2b(a^2)}
        
        {a, b, a^2, a^5, bab, babab}
      - {a, b, a^2, bab, a^2b(a^2)} (1 descendant)
        
        {a, b, a^2, bab, a^2b(a^2), babab}
      - {a, b, a^2, bab, babab} (1 descendant)
        
        {a, b, a^2, bab, babab, bababab}
    - {a, b, a^2, b^2a} (10 descendants)
      - {a, b, a^2, b^3, b^2a} (11 descendants)
        
        {a, b, a^2, a^4, b^3, b^2a}
        
        {a, b, a^2, b^3, a^3b, b^2a}
        
        {a, b, a^2, b^3, b^2a, a^2ba}
        
        {a, b, a^2, b^3, a^2(b^2), b^2a}
        
        {a, b, a^2, b^3, b^2a, ab(a^2)}
        
        {a, b, a^2, b^3, b(a^3), b^2a}
        
        {a, b, a^2, b^3, b^2a, b^2(a^2)}
        
        {a, b, a^2, a^5, b^3, b^2a}
        
        {a, b, a^2, b^3, b^2a, a^2b(a^2)}
        
        {a, b, a^2, b^3, b^2a, b^4a}
        
        {a, b, a^2, b^3, b^5, b^2a}
      - {a, b, a^2, a^4, b^2a} (10 descendants)
        
        {a, b, a^2, a^4, a^3b, b^2a}
        
        {a, b, a^2, a^4, b^2a, a^2ba}
        
        {a, b, a^2, a^4, a^2(b^2), b^2a}
        
        {a, b, a^2, a^4, b^2a, ab(a^2)}
        
        {a, b, a^2, a^4, b(a^3), b^2a}
        
        {a, b, a^2, a^4, b^2a, b^2(a^2)}
        
        {a, b, a^2, a^4, a^5, b^2a}
        
        {a, b, a^2, a^4, b^2a, a^2b(a^2)}
        
        {a, b, a^2, a^4, b^2a, b^2(a^4)}
        
        {a, b, a^2, a^4, a^7, b^2a}
      - {a, b, a^2, a^3b, b^2a} (8 descendants)
        
        {a, b, a^2, a^3b, b^2a, a^2ba}
        
        {a, b, a^2, a^2(b^2), a^3b, b^2a}
        
        {a, b, a^2, a^3b, b^2a, ab(a^2)}
        
        {a, b, a^2, b(a^3), a^3b, b^2a}
        
        {a, b, a^2, a^3b, b^2a, b^2(a^2)}
        
        {a, b, a^2, a^5, a^3b, b^2a}
        
        {a, b, a^2, a^3b, b^2a, a^2b(a^2)}
        
        {a, b, a^2, a^3b, b^2a, a^3(b^2)a}
      - {a, b, a^2, b^2a, a^2ba} (6 descendants)
        
        {a, b, a^2, a^2(b^2), b^2a, a^2ba}
        
        {a, b, a^2, b^2a, ab(a^2), a^2ba}
        
        {a, b, a^2, b(a^3), b^2a, a^2ba}
        
        {a, b, a^2, b^2a, b^2(a^2), a^2ba}
        
        {a, b, a^2, a^5, b^2a, a^2ba}
        
        {a, b, a^2, b^2a, a^2ba, a^2b(a^2)}
      - {a, b, a^2, a^2(b^2), b^2a} (6 descendants)
        
        {a, b, a^2, a^2(b^2), b^2a, ab(a^2)}
        
        {a, b, a^2, b(a^3), a^2(b^2), b^2a}
        
        {a, b, a^2, a^2(b^2), b^2a, b^2(a^2)}
        
        {a, b, a^2, a^5, a^2(b^2), b^2a}
        
        {a, b, a^2, a^2(b^2), b^2a, a^2b(a^2)}
        
        {a, b, a^2, a^2(b^2), b^2a, a^2(b^3)a}
      - {a, b, a^2, b^2a, ab(a^2)} (5 descendants)
        
        {a, b, a^2, b(a^3), b^2a, ab(a^2)}
        
        {a, b, a^2, b^2a, b^2(a^2), ab(a^2)}
        
        {a, b, a^2, a^5, b^2a, ab(a^2)}
        
        {a, b, a^2, b^2a, ab(a^2), a^2b(a^2)}
        
        {a, b, a^2, b^2a, ab(a^2), b^2ab(a^2)}
      - {a, b, a^2, b(a^3), b^2a} (3 descendants)
        
        {a, b, a^2, b(a^3), b^2a, b^2(a^2)}
        
        {a, b, a^2, a^5, b(a^3), b^2a}
        
        {a, b, a^2, b(a^3), b^2a, a^2b(a^2)}
      - {a, b, a^2, b^2a, b^2(a^2)} (2 descendants)
        
        {a, b, a^2, a^5, b^2a, b^2(a^2)}
        
        {a, b, a^2, b^2a, b^2(a^2), a^2b(a^2)}
      - {a, b, a^2, a^5, b^2a} (1 descendant)
        
        {a, b, a^2, a^5, b^2a, a^2b(a^2)}
      - {a, b, a^2, b^2a, a^2b(a^2)} (0 descendants)
    - {a, b, a^2, b^3} (10 descendants)
      - {a, b, a^2, a^4, b^3} (10 descendants)
        
        {a, b, a^2, a^4, b^3, a^3b}
        
        {a, b, a^2, a^4, b^3, a^2ba}
        
        {a, b, a^2, a^4, b^3, a^2(b^2)}
        
        {a, b, a^2, a^4, b^3, ab(a^2)}
        
        {a, b, a^2, a^4, b^3, b(a^3)}
        
        {a, b, a^2, a^4, b^3, b^2(a^2)}
        
        {a, b, a^2, a^4, a^5, b^3}
        
        {a, b, a^2, a^4, b^3, a^2b(a^2)}
        
        {a, b, a^2, a^4, b^3, b^5}
        
        {a, b, a^2, a^4, a^7, b^3}
      - {a, b, a^2, b^3, a^3b} (9 descendants)
        
        {a, b, a^2, b^3, a^3b, a^2ba}
        
        {a, b, a^2, b^3, a^2(b^2), a^3b}
        
        {a, b, a^2, b^3, a^3b, ab(a^2)}
        
        {a, b, a^2, b^3, b(a^3), a^3b}
        
        {a, b, a^2, b^3, a^3b, b^2(a^2)}
        
        {a, b, a^2, a^5, b^3, a^3b}
        
        {a, b, a^2, b^3, a^3b, a^2b(a^2)}
        
        {a, b, a^2, b^3, b^5, a^3b}
        
        {a, b, a^2, b^3, a^3b, a^3(b^3)}
      - {a, b, a^2, b^3, a^2ba} (7 descendants)
        
        {a, b, a^2, b^3, a^2(b^2), a^2ba}
        
        {a, b, a^2, b^3, ab(a^2), a^2ba}
        
        {a, b, a^2, b^3, b(a^3), a^2ba}
        
        {a, b, a^2, b^3, b^2(a^2), a^2ba}
        
        {a, b, a^2, a^5, b^3, a^2ba}
        
        {a, b, a^2, b^3, a^2ba, a^2b(a^2)}
        
        {a, b, a^2, b^3, b^5, a^2ba}
      - {a, b, a^2, b^3, a^2(b^2)} (7 descendants)
        
        {a, b, a^2, b^3, a^2(b^2), ab(a^2)}
        
        {a, b, a^2, b^3, b(a^3), a^2(b^2)}
        
        {a, b, a^2, b^3, a^2(b^2), b^2(a^2)}
        
        {a, b, a^2, a^5, b^3, a^2(b^2)}
        
        {a, b, a^2, b^3, a^2(b^2), a^2b(a^2)}
        
        {a, b, a^2, b^3, b^5, a^2(b^2)}
        
        {a, b, a^2, b^3, a^2(b^2), a^2(b^4)}
      - {a, b, a^2, b^3, ab(a^2)} (5 descendants)
        
        {a, b, a^2, b^3, b(a^3), ab(a^2)}
        
        {a, b, a^2, b^3, b^2(a^2), ab(a^2)}
        
        {a, b, a^2, a^5, b^3, ab(a^2)}
        
        {a, b, a^2, b^3, ab(a^2), a^2b(a^2)}
        
        {a, b, a^2, b^3, b^5, ab(a^2)}
      - {a, b, a^2, b^3, b(a^3)} (5 descendants)
        
        {a, b, a^2, b^3, b(a^3), b^2(a^2)}
        
        {a, b, a^2, a^5, b^3, b(a^3)}
        
        {a, b, a^2, b^3, b(a^3), a^2b(a^2)}
        
        {a, b, a^2, b^3, b^5, b(a^3)}
        
        {a, b, a^2, b^3, b(a^3), b^3(a^3)}
      - {a, b, a^2, b^3, b^2(a^2)} (4 descendants)
        
        {a, b, a^2, a^5, b^3, b^2(a^2)}
        
        {a, b, a^2, b^3, b^2(a^2), a^2b(a^2)}
        
        {a, b, a^2, b^3, b^5, b^2(a^2)}
        
        {a, b, a^2, b^3, b^2(a^2), b^4(a^2)}
      - {a, b, a^2, a^5, b^3} (2 descendants)
        
        {a, b, a^2, a^5, b^3, a^2b(a^2)}
        
        {a, b, a^2, a^5, b^3, b^5}
      - {a, b, a^2, b^3, a^2b(a^2)} (1 descendant)
        
        {a, b, a^2, b^3, b^5, a^2b(a^2)}
      - {a, b, a^2, b^3, b^5} (1 descendant)
        
        {a, b, a^2, b^3, b^5, b^7}
    - {a, b, a^2, a^4} (9 descendants)
      - {a, b, a^2, a^4, a^3b} (8 descendants)
        
        {a, b, a^2, a^4, a^3b, a^2ba}
        
        {a, b, a^2, a^4, a^2(b^2), a^3b}
        
        {a, b, a^2, a^4, a^3b, ab(a^2)}
        
        {a, b, a^2, a^4, b(a^3), a^3b}
        
        {a, b, a^2, a^4, a^3b, b^2(a^2)}
        
        {a, b, a^2, a^4, a^5, a^3b}
        
        {a, b, a^2, a^4, a^3b, a^2b(a^2)}
        
        {a, b, a^2, a^4, a^7, a^3b}
      - {a, b, a^2, a^4, a^2ba} (8 descendants)
        
        {a, b, a^2, a^4, a^2(b^2), a^2ba}
        
        {a, b, a^2, a^4, ab(a^2), a^2ba}
        
        {a, b, a^2, a^4, b(a^3), a^2ba}
        
        {a, b, a^2, a^4, b^2(a^2), a^2ba}
        
        {a, b, a^2, a^4, a^5, a^2ba}
        
        {a, b, a^2, a^4, a^2ba, a^2b(a^2)}
        
        {a, b, a^2, a^4, a^7, a^2ba}
        
        {a, b, a^2, a^4, a^2ba, a^2b(a^4)}
      - {a, b, a^2, a^4, a^2(b^2)} (6 descendants)
        
        {a, b, a^2, a^4, a^2(b^2), ab(a^2)}
        
        {a, b, a^2, a^4, b(a^3), a^2(b^2)}
        
        {a, b, a^2, a^4, a^2(b^2), b^2(a^2)}
        
        {a, b, a^2, a^4, a^5, a^2(b^2)}
        
        {a, b, a^2, a^4, a^2(b^2), a^2b(a^2)}
        
        {a, b, a^2, a^4, a^7, a^2(b^2)}
      - {a, b, a^2, a^4, ab(a^2)} (6 descendants)
        
        {a, b, a^2, a^4, b(a^3), ab(a^2)}
        
        {a, b, a^2, a^4, b^2(a^2), ab(a^2)}
        
        {a, b, a^2, a^4, a^5, ab(a^2)}
        
        {a, b, a^2, a^4, ab(a^2), a^2b(a^2)}
        
        {a, b, a^2, a^4, a^7, ab(a^2)}
        
        {a, b, a^2, a^4, ab(a^2), a^4b(a^2)}
      - {a, b, a^2, a^4, b(a^3)} (4 descendants)
        
        {a, b, a^2, a^4, b(a^3), b^2(a^2)}
        
        {a, b, a^2, a^4, a^5, b(a^3)}
        
        {a, b, a^2, a^4, b(a^3), a^2b(a^2)}
        
        {a, b, a^2, a^4, a^7, b(a^3)}
      - {a, b, a^2, a^4, b^2(a^2)} (3 descendants)
        
        {a, b, a^2, a^4, a^5, b^2(a^2)}
        
        {a, b, a^2, a^4, b^2(a^2), a^2b(a^2)}
        
        {a, b, a^2, a^4, a^7, b^2(a^2)}
      - {a, b, a^2, a^4, a^5} (3 descendants)
        
        {a, b, a^2, a^4, a^5, a^2b(a^2)}
        
        {a, b, a^2, a^4, a^5, a^7}
        
        {a, b, a^2, a^4, a^5, a^8}
      - {a, b, a^2, a^4, a^2b(a^2)} (1 descendant)
        
        {a, b, a^2, a^4, a^7, a^2b(a^2)}
      - {a, b, a^2, a^4, a^7} (0 descendants)
    - {a, b, a^2, a^3b} (7 descendants)
      - {a, b, a^2, a^3b, a^2ba} (6 descendants)
        
        {a, b, a^2, a^2(b^2), a^3b, a^2ba}
        
        {a, b, a^2, a^3b, ab(a^2), a^2ba}
        
        {a, b, a^2, b(a^3), a^3b, a^2ba}
        
        {a, b, a^2, a^3b, b^2(a^2), a^2ba}
        
        {a, b, a^2, a^5, a^3b, a^2ba}
        
        {a, b, a^2, a^3b, a^2ba, a^2b(a^2)}
      - {a, b, a^2, a^2(b^2), a^3b} (5 descendants)
        
        {a, b, a^2, a^2(b^2), a^3b, ab(a^2)}
        
        {a, b, a^2, b(a^3), a^2(b^2), a^3b}
        
        {a, b, a^2, a^2(b^2), a^3b, b^2(a^2)}
        
        {a, b, a^2, a^5, a^2(b^2), a^3b}
        
        {a, b, a^2, a^2(b^2), a^3b, a^2b(a^2)}
      - {a, b, a^2, a^3b, ab(a^2)} (4 descendants)
        
        {a, b, a^2, b(a^3), a^3b, ab(a^2)}
        
        {a, b, a^2, a^3b, b^2(a^2), ab(a^2)}
        
        {a, b, a^2, a^5, a^3b, ab(a^2)}
        
        {a, b, a^2, a^3b, ab(a^2), a^2b(a^2)}
      - {a, b, a^2, b(a^3), a^3b} (4 descendants)
        
        {a, b, a^2, b(a^3), a^3b, b^2(a^2)}
        
        {a, b, a^2, a^5, b(a^3), a^3b}
        
        {a, b, a^2, b(a^3), a^3b, a^2b(a^2)}
        
        {a, b, a^2, b(a^3), a^3b, a^3b(a^3)}
      - {a, b, a^2, a^3b, b^2(a^2)} (3 descendants)
        
        {a, b, a^2, a^5, a^3b, b^2(a^2)}
        
        {a, b, a^2, a^3b, b^2(a^2), a^2b(a^2)}
        
        {a, b, a^2, a^3b, b^2(a^2), a^3(b^2)(a^2)}
      - {a, b, a^2, a^5, a^3b} (1 descendant)
        
        {a, b, a^2, a^5, a^3b, a^2b(a^2)}
      - {a, b, a^2, a^3b, a^2b(a^2)} (0 descendants)
    - {a, b, a^2, a^2ba} (6 descendants)
      - {a, b, a^2, a^2(b^2), a^2ba} (5 descendants)
        
        {a, b, a^2, a^2(b^2), ab(a^2), a^2ba}
        
        {a, b, a^2, b(a^3), a^2(b^2), a^2ba}
        
        {a, b, a^2, a^2(b^2), b^2(a^2), a^2ba}
        
        {a, b, a^2, a^5, a^2(b^2), a^2ba}
        
        {a, b, a^2, a^2(b^2), a^2ba, a^2b(a^2)}
      - {a, b, a^2, ab(a^2), a^2ba} (5 descendants)
        
        {a, b, a^2, b(a^3), ab(a^2), a^2ba}
        
        {a, b, a^2, b^2(a^2), ab(a^2), a^2ba}
        
        {a, b, a^2, a^5, ab(a^2), a^2ba}
        
        {a, b, a^2, ab(a^2), a^2ba, a^2b(a^2)}
        
        {a, b, a^2, ab(a^2), a^2ba, a^2bab(a^2)}
      - {a, b, a^2, b(a^3), a^2ba} (3 descendants)
        
        {a, b, a^2, b(a^3), b^2(a^2), a^2ba}
        
        {a, b, a^2, a^5, b(a^3), a^2ba}
        
        {a, b, a^2, b(a^3), a^2ba, a^2b(a^2)}
      - {a, b, a^2, b^2(a^2), a^2ba} (2 descendants)
        
        {a, b, a^2, a^5, b^2(a^2), a^2ba}
        
        {a, b, a^2, b^2(a^2), a^2ba, a^2b(a^2)}
      - {a, b, a^2, a^5, a^2ba} (1 descendant)
        
        {a, b, a^2, a^5, a^2ba, a^2b(a^2)}
      - {a, b, a^2, a^2ba, a^2b(a^2)} (2 descendants)
        
        {a, b, a^2, a^2ba, a^2b(a^2), a^2b(a^2)ba}
        
        {a, b, a^2, a^2ba, a^2b(a^2), a^2b(a^2)b(a^2)}
    - {a, b, a^2, a^2(b^2)} (5 descendants)
      - {a, b, a^2, a^2(b^2), ab(a^2)} (4 descendants)
        
        {a, b, a^2, b(a^3), a^2(b^2), ab(a^2)}
        
        {a, b, a^2, a^2(b^2), b^2(a^2), ab(a^2)}
        
        {a, b, a^2, a^5, a^2(b^2), ab(a^2)}
        
        {a, b, a^2, a^2(b^2), ab(a^2), a^2b(a^2)}
      - {a, b, a^2, b(a^3), a^2(b^2)} (4 descendants)
        
        {a, b, a^2, b(a^3), a^2(b^2), b^2(a^2)}
        
        {a, b, a^2, a^5, b(a^3), a^2(b^2)}
        
        {a, b, a^2, b(a^3), a^2(b^2), a^2b(a^2)}
        
        {a, b, a^2, b(a^3), a^2(b^2), a^2(b^2)(a^3)}
      - {a, b, a^2, a^2(b^2), b^2(a^2)} (3 descendants)
        
        {a, b, a^2, a^5, a^2(b^2), b^2(a^2)}
        
        {a, b, a^2, a^2(b^2), b^2(a^2), a^2b(a^2)}
        
        {a, b, a^2, a^2(b^2), b^2(a^2), a^2(b^3)(a^2)}
      - {a, b, a^2, a^5, a^2(b^2)} (1 descendant)
        
        {a, b, a^2, a^5, a^2(b^2), a^2b(a^2)}
      - {a, b, a^2, a^2(b^2), a^2b(a^2)} (0 descendants)
    - {a, b, a^2, ab(a^2)} (4 descendants)
      - {a, b, a^2, b(a^3), ab(a^2)} (3 descendants)
        
        {a, b, a^2, b(a^3), b^2(a^2), ab(a^2)}
        
        {a, b, a^2, a^5, b(a^3), ab(a^2)}
        
        {a, b, a^2, b(a^3), ab(a^2), a^2b(a^2)}
      - {a, b, a^2, b^2(a^2), ab(a^2)} (2 descendants)
        
        {a, b, a^2, a^5, b^2(a^2), ab(a^2)}
        
        {a, b, a^2, b^2(a^2), ab(a^2), a^2b(a^2)}
      - {a, b, a^2, a^5, ab(a^2)} (1 descendant)
        
        {a, b, a^2, a^5, ab(a^2), a^2b(a^2)}
      - {a, b, a^2, ab(a^2), a^2b(a^2)} (2 descendants)
        
        {a, b, a^2, ab(a^2), a^2b(a^2), ab(a^2)b(a^2)}
        
        {a, b, a^2, ab(a^2), a^2b(a^2), a^2b(a^2)b(a^2)}
    - {a, b, a^2, b(a^3)} (3 descendants)
      - {a, b, a^2, b(a^3), b^2(a^2)} (2 descendants)
        
        {a, b, a^2, a^5, b(a^3), b^2(a^2)}
        
        {a, b, a^2, b(a^3), b^2(a^2), a^2b(a^2)}
      - {a, b, a^2, a^5, b(a^3)} (1 descendant)
        
        {a, b, a^2, a^5, b(a^3), a^2b(a^2)}
      - {a, b, a^2, b(a^3), a^2b(a^2)} (0 descendants)
    - {a, b, a^2, b^2(a^2)} (2 descendants)
      - {a, b, a^2, a^5, b^2(a^2)} (1 descendant)
        
        {a, b, a^2, a^5, b^2(a^2), a^2b(a^2)}
      - {a, b, a^2, b^2(a^2), a^2b(a^2)} (0 descendants)
    - {a, b, a^2, a^5} (1 descendant)
      - {a, b, a^2, a^5, a^2b(a^2)} (0 descendants)
    - {a, b, a^2, a^2b(a^2)} (0 descendants)
  - {a, b, ab} (19 descendants)
    - {a, b, ab, ba} (29 descendants)
      - {a, b, b^2, ab, ba} (41 descendants)
        
        {a, b, a^3, b^2, ab, ba}
        
        {a, b, b^2, ab, ba, a^2b}
        
        {a, b, b^2, ab, ba, aba}
        
        {a, b, b^2, ab, a(b^2), ba}
        
        {a, b, b^2, ab, ba, b(a^2)}
        
        {a, b, b^2, ab, ba, bab}
        
        {a, b, b^2, ab, ba, b^2a}
        
        {a, b, b^2, b^3, ab, ba}
        
        {a, b, b^2, ab, ba, a^3b}
        
        {a, b, b^2, ab, ba, a^2ba}
        
        {a, b, b^2, ab, ba, a^2(b^2)}
        
        {a, b, b^2, ab, ba, ab(a^2)}
        
        {a, b, b^2, ab, ba, abab}
        
        {a, b, b^2, ab, ba, a(b^2)a}
        
        {a, b, b^2, ab, a(b^3), ba}
        
        {a, b, b^2, ab, ba, b(a^3)}
        
        {a, b, b^2, ab, ba, b(a^2)b}
        
        {a, b, b^2, ab, ba, baba}
        
        {a, b, b^2, ab, ba, ba(b^2)}
        
        {a, b, b^2, ab, ba, b^2(a^2)}
        
        {a, b, b^2, ab, ba, b^2ab}
        
        {a, b, b^2, ab, ba, b^3a}
        
        {a, b, b^2, b^4, ab, ba}
        
        {a, b, b^2, ab, ba, ab(a^2)b}
        
        {a, b, b^2, ab, ba, ababa}
        
        {a, b, b^2, ab, ba, aba(b^2)}
        
        {a, b, b^2, ab, ba, a(b^2)ab}
        
        {a, b, b^2, ab, ba, a(b^3)a}
        
        {a, b, b^2, ab, a(b^4), ba}
        
        {a, b, b^2, ab, ba, b(a^3)b}
        
        {a, b, b^2, ab, ba, b(a^2)ba}
        
        {a, b, b^2, ab, ba, b(a^2)(b^2)}
        
        {a, b, b^2, ab, ba, babab}
        
        {a, b, b^2, ab, ba, ba(b^2)a}
        
        {a, b, b^2, ab, ba, ba(b^3)}
        
        {a, b, b^2, ab, ba, b^2(a^2)b}
        
        {a, b, b^2, ab, ba, b^2aba}
        
        {a, b, b^2, ab, ba, b^2a(b^2)}
        
        {a, b, b^2, ab, ba, b^3ab}
        
        {a, b, b^2, ab, ba, b^4a}
        
        {a, b, b^2, b^5, ab, ba}
      - {a, b, a^3, ab, ba} (28 descendants)
        
        {a, b, a^3, ab, ba, a^2b}
        
        {a, b, a^3, ab, ba, aba}
        
        {a, b, a^3, ab, a(b^2), ba}
        
        {a, b, a^3, ab, ba, b(a^2)}
        
        {a, b, a^3, ab, ba, bab}
        
        {a, b, a^3, ab, ba, b^2a}
        
        {a, b, a^3, b^3, ab, ba}
        
        {a, b, a^3, ab, ba, a^3b}
        
        {a, b, a^3, ab, ba, a^2ba}
        
        {a, b, a^3, ab, ba, ab(a^2)}
        
        {a, b, a^3, ab, ba, abab}
        
        {a, b, a^3, ab, ba, a(b^2)a}
        
        {a, b, a^3, ab, a(b^3), ba}
        
        {a, b, a^3, ab, ba, b(a^3)}
        
        {a, b, a^3, ab, ba, b(a^2)b}
        
        {a, b, a^3, ab, ba, baba}
        
        {a, b, a^3, ab, ba, ba(b^2)}
        
        {a, b, a^3, ab, ba, b^2ab}
        
        {a, b, a^3, ab, ba, b^3a}
        
        {a, b, a^3, a^5, ab, ba}
        
        {a, b, a^3, ab, ba, ab(a^2)b}
        
        {a, b, a^3, ab, ba, ababa}
        
        {a, b, a^3, ab, ba, a(b^2)ab}
        
        {a, b, a^3, ab, ba, a(b^3)a}
        
        {a, b, a^3, ab, ba, b(a^3)b}
        
        {a, b, a^3, ab, ba, b(a^2)ba}
        
        {a, b, a^3, ab, ba, babab}
        
        {a, b, a^3, ab, ba, ba(b^2)a}
      - {a, b, ab, ba, a^2b} (32 descendants)
        
        {a, b, ab, ba, a^2b, aba}
        
        {a, b, ab, a(b^2), ba, a^2b}
        
        {a, b, ab, ba, b(a^2), a^2b}
        
        {a, b, ab, ba, a^2b, bab}
        
        {a, b, ab, ba, a^2b, b^2a}
        
        {a, b, b^3, ab, ba, a^2b}
        
        {a, b, ab, ba, a^2b, a^3b}
        
        {a, b, ab, ba, a^2b, a^2ba}
        
        {a, b, ab, ba, a^2b, ab(a^2)}
        
        {a, b, ab, ba, a^2b, abab}
        
        {a, b, ab, ba, a^2b, a(b^2)a}
        
        {a, b, ab, a(b^3), ba, a^2b}
        
        {a, b, ab, ba, b(a^3), a^2b}
        
        {a, b, ab, ba, a^2b, b(a^2)b}
        
        {a, b, ab, ba, a^2b, baba}
        
        {a, b, ab, ba, a^2b, ba(b^2)}
        
        {a, b, ab, ba, a^2b, b^2ab}
        
        {a, b, ab, ba, a^2b, b^3a}
        
        {a, b, ab, ba, a^2b, a^4b}
        
        {a, b, ab, ba, a^2b, ab(a^2)b}
        
        {a, b, ab, ba, a^2b, ababa}
        
        {a, b, ab, ba, a^2b, a(b^2)ab}
        
        {a, b, ab, ba, a^2b, a(b^3)a}
        
        {a, b, ab, ba, a^2b, b(a^3)b}
        
        {a, b, ab, ba, a^2b, b(a^2)ba}
        
        {a, b, ab, ba, a^2b, babab}
        
        {a, b, ab, ba, a^2b, ba(b^2)a}
        
        {a, b, ab, ba, a^2b, b^2(a^2)b}
        
        {a, b, ab, ba, a^2b, ab(a^3)b}
        
        {a, b, ab, ba, a^2b, a(b^2)(a^2)b}
        
        {a, b, ab, ba, a^2b, b(a^4)b}
        
        {a, b, ab, ba, a^2b, bab(a^2)b}
      - {a, b, ab, ba, aba} (38 descendants)
        
        {a, b, ab, a(b^2), ba, aba}
        
        {a, b, ab, ba, b(a^2), aba}
        
        {a, b, ab, ba, aba, bab}
        
        {a, b, ab, ba, b^2a, aba}
        
        {a, b, b^3, ab, ba, aba}
        
        {a, b, ab, ba, a^3b, aba}
        
        {a, b, ab, ba, aba, a^2ba}
        
        {a, b, ab, ba, aba, ab(a^2)}
        
        {a, b, ab, ba, aba, abab}
        
        {a, b, ab, ba, aba, a(b^2)a}
        
        {a, b, ab, a(b^3), ba, aba}
        
        {a, b, ab, ba, b(a^3), aba}
        
        {a, b, ab, ba, aba, b(a^2)b}
        
        {a, b, ab, ba, aba, baba}
        
        {a, b, ab, ba, aba, ba(b^2)}
        
        {a, b, ab, ba, aba, b^2ab}
        
        {a, b, ab, ba, b^3a, aba}
        
        {a, b, ab, ba, aba, a^3ba}
        
        {a, b, ab, ba, aba, ab(a^3)}
        
        {a, b, ab, ba, aba, ab(a^2)b}
        
        {a, b, ab, ba, aba, ababa}
        
        {a, b, ab, ba, aba, aba(b^2)}
        
        {a, b, ab, ba, aba, a(b^2)ab}
        
        {a, b, ab, ba, aba, a(b^3)a}
        
        {a, b, ab, ba, aba, b(a^3)b}
        
        {a, b, ab, ba, aba, b(a^2)ba}
        
        {a, b, ab, ba, aba, babab}
        
        {a, b, ab, ba, aba, ba(b^2)a}
        
        {a, b, ab, ba, aba, b^2aba}
        
        {a, b, ab, ba, aba, ab(a^3)b}
        
        {a, b, ab, ba, aba, ab(a^2)ba}
        
        {a, b, ab, ba, aba, ababab}
        
        {a, b, ab, ba, aba, aba(b^2)a}
        
        {a, b, ab, ba, aba, a(b^2)aba}
        
        {a, b, ab, ba, aba, b(a^3)ba}
        
        {a, b, ab, ba, aba, bababa}
        
        {a, b, ab, ba, aba, ab(a^3)ba}
        
        {a, b, ab, ba, aba, abababa}
      - {a, b, ab, a(b^2), ba} (30 descendants)
        
        {a, b, ab, a(b^2), ba, b(a^2)}
        
        {a, b, ab, a(b^2), ba, bab}
        
        {a, b, ab, a(b^2), ba, b^2a}
        
        {a, b, b^3, ab, a(b^2), ba}
        
        {a, b, ab, a(b^2), ba, a^3b}
        
        {a, b, ab, a(b^2), ba, a^2ba}
        
        {a, b, ab, a(b^2), ba, ab(a^2)}
        
        {a, b, ab, a(b^2), ba, abab}
        
        {a, b, ab, a(b^2), ba, a(b^2)a}
        
        {a, b, ab, a(b^2), a(b^3), ba}
        
        {a, b, ab, a(b^2), ba, b(a^3)}
        
        {a, b, ab, a(b^2), ba, b(a^2)b}
        
        {a, b, ab, a(b^2), ba, baba}
        
        {a, b, ab, a(b^2), ba, ba(b^2)}
        
        {a, b, ab, a(b^2), ba, b^2ab}
        
        {a, b, ab, a(b^2), ba, b^3a}
        
        {a, b, ab, a(b^2), ba, ab(a^2)b}
        
        {a, b, ab, a(b^2), ba, ababa}
        
        {a, b, ab, a(b^2), ba, a(b^2)(a^2)}
        
        {a, b, ab, a(b^2), ba, a(b^2)ab}
        
        {a, b, ab, a(b^2), ba, a(b^3)a}
        
        {a, b, ab, a(b^2), a(b^4), ba}
        
        {a, b, ab, a(b^2), ba, b(a^3)b}
        
        {a, b, ab, a(b^2), ba, b(a^2)ba}
        
        {a, b, ab, a(b^2), ba, babab}
        
        {a, b, ab, a(b^2), ba, ba(b^2)a}
        
        {a, b, ab, a(b^2), ba, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), ba, a(b^2)aba}
        
        {a, b, ab, a(b^2), ba, a(b^3)ab}
        
        {a, b, ab, a(b^2), ba, a(b^4)a}
      - {a, b, ab, ba, b(a^2)} (29 descendants)
        
        {a, b, ab, ba, b(a^2), bab}
        
        {a, b, ab, ba, b(a^2), b^2a}
        
        {a, b, b^3, ab, ba, b(a^2)}
        
        {a, b, ab, ba, b(a^2), a^3b}
        
        {a, b, ab, ba, b(a^2), a^2ba}
        
        {a, b, ab, ba, b(a^2), ab(a^2)}
        
        {a, b, ab, ba, b(a^2), abab}
        
        {a, b, ab, ba, b(a^2), a(b^2)a}
        
        {a, b, ab, a(b^3), ba, b(a^2)}
        
        {a, b, ab, ba, b(a^2), b(a^3)}
        
        {a, b, ab, ba, b(a^2), b(a^2)b}
        
        {a, b, ab, ba, b(a^2), baba}
        
        {a, b, ab, ba, b(a^2), ba(b^2)}
        
        {a, b, ab, ba, b(a^2), b^2ab}
        
        {a, b, ab, ba, b(a^2), b^3a}
        
        {a, b, ab, ba, b(a^2), ab(a^2)b}
        
        {a, b, ab, ba, b(a^2), ababa}
        
        {a, b, ab, ba, b(a^2), a(b^2)ab}
        
        {a, b, ab, ba, b(a^2), a(b^3)a}
        
        {a, b, ab, ba, b(a^2), b(a^4)}
        
        {a, b, ab, ba, b(a^2), b(a^3)b}
        
        {a, b, ab, ba, b(a^2), b(a^2)ba}
        
        {a, b, ab, ba, b(a^2), b(a^2)(b^2)}
        
        {a, b, ab, ba, b(a^2), babab}
        
        {a, b, ab, ba, b(a^2), ba(b^2)a}
        
        {a, b, ab, ba, b(a^2), b(a^4)b}
        
        {a, b, ab, ba, b(a^2), b(a^3)ba}
        
        {a, b, ab, ba, b(a^2), b(a^2)bab}
        
        {a, b, ab, ba, b(a^2), b(a^2)(b^2)a}
      - {a, b, ab, ba, bab} (35 descendants)
        
        {a, b, ab, ba, b^2a, bab}
        
        {a, b, b^3, ab, ba, bab}
        
        {a, b, ab, ba, a^3b, bab}
        
        {a, b, ab, ba, bab, a^2ba}
        
        {a, b, ab, ba, ab(a^2), bab}
        
        {a, b, ab, ba, bab, abab}
        
        {a, b, ab, ba, a(b^2)a, bab}
        
        {a, b, ab, a(b^3), ba, bab}
        
        {a, b, ab, ba, b(a^3), bab}
        
        {a, b, ab, ba, bab, b(a^2)b}
        
        {a, b, ab, ba, bab, baba}
        
        {a, b, ab, ba, bab, ba(b^2)}
        
        {a, b, ab, ba, bab, b^2ab}
        
        {a, b, ab, ba, b^3a, bab}
        
        {a, b, ab, ba, bab, a^2bab}
        
        {a, b, ab, ba, bab, ab(a^2)b}
        
        {a, b, ab, ba, bab, ababa}
        
        {a, b, ab, ba, bab, a(b^2)ab}
        
        {a, b, ab, ba, a(b^3)a, bab}
        
        {a, b, ab, ba, bab, b(a^3)b}
        
        {a, b, ab, ba, bab, b(a^2)ba}
        
        {a, b, ab, ba, bab, bab(a^2)}
        
        {a, b, ab, ba, bab, babab}
        
        {a, b, ab, ba, bab, ba(b^2)a}
        
        {a, b, ab, ba, bab, ba(b^3)}
        
        {a, b, ab, ba, bab, b^3ab}
        
        {a, b, ab, ba, bab, ababab}
        
        {a, b, ab, ba, bab, a(b^3)ab}
        
        {a, b, ab, ba, bab, b(a^2)bab}
        
        {a, b, ab, ba, bab, bab(a^2)b}
        
        {a, b, ab, ba, bab, bababa}
        
        {a, b, ab, ba, bab, ba(b^2)ab}
        
        {a, b, ab, ba, bab, ba(b^3)a}
        
        {a, b, ab, ba, bab, bababab}
        
        {a, b, ab, ba, bab, ba(b^3)ab}
      - {a, b, ab, ba, b^2a} (27 descendants)
        
        {a, b, b^3, ab, ba, b^2a}
        
        {a, b, ab, ba, a^3b, b^2a}
        
        {a, b, ab, ba, b^2a, a^2ba}
        
        {a, b, ab, ba, b^2a, ab(a^2)}
        
        {a, b, ab, ba, b^2a, abab}
        
        {a, b, ab, ba, b^2a, a(b^2)a}
        
        {a, b, ab, a(b^3), ba, b^2a}
        
        {a, b, ab, ba, b(a^3), b^2a}
        
        {a, b, ab, ba, b^2a, b(a^2)b}
        
        {a, b, ab, ba, b^2a, baba}
        
        {a, b, ab, ba, b^2a, ba(b^2)}
        
        {a, b, ab, ba, b^2a, b^2ab}
        
        {a, b, ab, ba, b^2a, b^3a}
        
        {a, b, ab, ba, b^2a, a^2(b^2)a}
        
        {a, b, ab, ba, b^2a, ab(a^2)b}
        
        {a, b, ab, ba, b^2a, ababa}
        
        {a, b, ab, ba, b^2a, a(b^2)ab}
        
        {a, b, ab, ba, b^2a, a(b^3)a}
        
        {a, b, ab, ba, b^2a, b(a^3)b}
        
        {a, b, ab, ba, b^2a, b(a^2)ba}
        
        {a, b, ab, ba, b^2a, babab}
        
        {a, b, ab, ba, b^2a, ba(b^2)a}
        
        {a, b, ab, ba, b^2a, b^4a}
        
        {a, b, ab, ba, b^2a, aba(b^2)a}
        
        {a, b, ab, ba, b^2a, a(b^4)a}
        
        {a, b, ab, ba, b^2a, b(a^2)(b^2)a}
        
        {a, b, ab, ba, b^2a, ba(b^3)a}
      - {a, b, b^3, ab, ba} (21 descendants)
        
        {a, b, b^3, ab, ba, a^3b}
        
        {a, b, b^3, ab, ba, a^2ba}
        
        {a, b, b^3, ab, ba, ab(a^2)}
        
        {a, b, b^3, ab, ba, abab}
        
        {a, b, b^3, ab, ba, a(b^2)a}
        
        {a, b, b^3, ab, a(b^3), ba}
        
        {a, b, b^3, ab, ba, b(a^3)}
        
        {a, b, b^3, ab, ba, b(a^2)b}
        
        {a, b, b^3, ab, ba, baba}
        
        {a, b, b^3, ab, ba, ba(b^2)}
        
        {a, b, b^3, ab, ba, b^2ab}
        
        {a, b, b^3, ab, ba, b^3a}
        
        {a, b, b^3, ab, ba, ab(a^2)b}
        
        {a, b, b^3, ab, ba, ababa}
        
        {a, b, b^3, ab, ba, a(b^2)ab}
        
        {a, b, b^3, ab, ba, a(b^3)a}
        
        {a, b, b^3, ab, ba, b(a^3)b}
        
        {a, b, b^3, ab, ba, b(a^2)ba}
        
        {a, b, b^3, ab, ba, babab}
        
        {a, b, b^3, ab, ba, ba(b^2)a}
        
        {a, b, b^3, b^5, ab, ba}
      - {a, b, ab, ba, a^3b} (19 descendants)
        
        {a, b, ab, ba, a^3b, a^2ba}
        
        {a, b, ab, ba, a^3b, ab(a^2)}
        
        {a, b, ab, ba, a^3b, abab}
        
        {a, b, ab, ba, a^3b, a(b^2)a}
        
        {a, b, ab, a(b^3), ba, a^3b}
        
        {a, b, ab, ba, b(a^3), a^3b}
        
        {a, b, ab, ba, a^3b, b(a^2)b}
        
        {a, b, ab, ba, a^3b, baba}
        
        {a, b, ab, ba, a^3b, ba(b^2)}
        
        {a, b, ab, ba, a^3b, b^2ab}
        
        {a, b, ab, ba, a^3b, b^3a}
        
        {a, b, ab, ba, a^3b, ab(a^2)b}
        
        {a, b, ab, ba, a^3b, ababa}
        
        {a, b, ab, ba, a^3b, a(b^2)ab}
        
        {a, b, ab, ba, a^3b, a(b^3)a}
        
        {a, b, ab, ba, a^3b, b(a^3)b}
        
        {a, b, ab, ba, a^3b, b(a^2)ba}
        
        {a, b, ab, ba, a^3b, babab}
        
        {a, b, ab, ba, a^3b, ba(b^2)a}
      - {a, b, ab, ba, a^2ba} (18 descendants)
        
        {a, b, ab, ba, ab(a^2), a^2ba}
        
        {a, b, ab, ba, a^2ba, abab}
        
        {a, b, ab, ba, a(b^2)a, a^2ba}
        
        {a, b, ab, a(b^3), ba, a^2ba}
        
        {a, b, ab, ba, b(a^3), a^2ba}
        
        {a, b, ab, ba, b(a^2)b, a^2ba}
        
        {a, b, ab, ba, a^2ba, baba}
        
        {a, b, ab, ba, ba(b^2), a^2ba}
        
        {a, b, ab, ba, a^2ba, b^2ab}
        
        {a, b, ab, ba, b^3a, a^2ba}
        
        {a, b, ab, ba, a^2ba, ab(a^2)b}
        
        {a, b, ab, ba, a^2ba, ababa}
        
        {a, b, ab, ba, a^2ba, a(b^2)ab}
        
        {a, b, ab, ba, a(b^3)a, a^2ba}
        
        {a, b, ab, ba, b(a^3)b, a^2ba}
        
        {a, b, ab, ba, a^2ba, b(a^2)ba}
        
        {a, b, ab, ba, a^2ba, babab}
        
        {a, b, ab, ba, a^2ba, ba(b^2)a}
      - {a, b, ab, ba, ab(a^2)} (17 descendants)
        
        {a, b, ab, ba, ab(a^2), abab}
        
        {a, b, ab, ba, ab(a^2), a(b^2)a}
        
        {a, b, ab, a(b^3), ba, ab(a^2)}
        
        {a, b, ab, ba, b(a^3), ab(a^2)}
        
        {a, b, ab, ba, ab(a^2), b(a^2)b}
        
        {a, b, ab, ba, ab(a^2), baba}
        
        {a, b, ab, ba, ab(a^2), ba(b^2)}
        
        {a, b, ab, ba, ab(a^2), b^2ab}
        
        {a, b, ab, ba, b^3a, ab(a^2)}
        
        {a, b, ab, ba, ab(a^2), ab(a^2)b}
        
        {a, b, ab, ba, ab(a^2), ababa}
        
        {a, b, ab, ba, ab(a^2), a(b^2)ab}
        
        {a, b, ab, ba, ab(a^2), a(b^3)a}
        
        {a, b, ab, ba, ab(a^2), b(a^3)b}
        
        {a, b, ab, ba, ab(a^2), b(a^2)ba}
        
        {a, b, ab, ba, ab(a^2), babab}
        
        {a, b, ab, ba, ab(a^2), ba(b^2)a}
      - {a, b, ab, ba, abab} (16 descendants)
        
        {a, b, ab, ba, a(b^2)a, abab}
        
        {a, b, ab, a(b^3), ba, abab}
        
        {a, b, ab, ba, b(a^3), abab}
        
        {a, b, ab, ba, b(a^2)b, abab}
        
        {a, b, ab, ba, abab, baba}
        
        {a, b, ab, ba, ba(b^2), abab}
        
        {a, b, ab, ba, b^2ab, abab}
        
        {a, b, ab, ba, b^3a, abab}
        
        {a, b, ab, ba, abab, ab(a^2)b}
        
        {a, b, ab, ba, abab, ababa}
        
        {a, b, ab, ba, abab, a(b^2)ab}
        
        {a, b, ab, ba, a(b^3)a, abab}
        
        {a, b, ab, ba, b(a^3)b, abab}
        
        {a, b, ab, ba, abab, b(a^2)ba}
        
        {a, b, ab, ba, abab, babab}
        
        {a, b, ab, ba, abab, ba(b^2)a}
      - {a, b, ab, ba, a(b^2)a} (16 descendants)
        
        {a, b, ab, a(b^3), ba, a(b^2)a}
        
        {a, b, ab, ba, b(a^3), a(b^2)a}
        
        {a, b, ab, ba, a(b^2)a, b(a^2)b}
        
        {a, b, ab, ba, a(b^2)a, baba}
        
        {a, b, ab, ba, a(b^2)a, ba(b^2)}
        
        {a, b, ab, ba, a(b^2)a, b^2ab}
        
        {a, b, ab, ba, b^3a, a(b^2)a}
        
        {a, b, ab, ba, a(b^2)a, ab(a^2)b}
        
        {a, b, ab, ba, a(b^2)a, ababa}
        
        {a, b, ab, ba, a(b^2)a, a(b^2)ab}
        
        {a, b, ab, ba, a(b^2)a, a(b^3)a}
        
        {a, b, ab, ba, a(b^2)a, b(a^3)b}
        
        {a, b, ab, ba, a(b^2)a, b(a^2)ba}
        
        {a, b, ab, ba, a(b^2)a, babab}
        
        {a, b, ab, ba, a(b^2)a, ba(b^2)a}
        
        {a, b, ab, ba, a(b^2)a, a(b^2)a(b^2)a}
      - {a, b, ab, a(b^3), ba} (14 descendants)
        
        {a, b, ab, a(b^3), ba, b(a^3)}
        
        {a, b, ab, a(b^3), ba, b(a^2)b}
        
        {a, b, ab, a(b^3), ba, baba}
        
        {a, b, ab, a(b^3), ba, ba(b^2)}
        
        {a, b, ab, a(b^3), ba, b^2ab}
        
        {a, b, ab, a(b^3), ba, b^3a}
        
        {a, b, ab, a(b^3), ba, ab(a^2)b}
        
        {a, b, ab, a(b^3), ba, ababa}
        
        {a, b, ab, a(b^3), ba, a(b^2)ab}
        
        {a, b, ab, a(b^3), ba, a(b^3)a}
        
        {a, b, ab, a(b^3), ba, b(a^3)b}
        
        {a, b, ab, a(b^3), ba, b(a^2)ba}
        
        {a, b, ab, a(b^3), ba, babab}
        
        {a, b, ab, a(b^3), ba, ba(b^2)a}
      - {a, b, ab, ba, b(a^3)} (13 descendants)
        
        {a, b, ab, ba, b(a^3), b(a^2)b}
        
        {a, b, ab, ba, b(a^3), baba}
        
        {a, b, ab, ba, b(a^3), ba(b^2)}
        
        {a, b, ab, ba, b(a^3), b^2ab}
        
        {a, b, ab, ba, b(a^3), b^3a}
        
        {a, b, ab, ba, b(a^3), ab(a^2)b}
        
        {a, b, ab, ba, b(a^3), ababa}
        
        {a, b, ab, ba, b(a^3), a(b^2)ab}
        
        {a, b, ab, ba, b(a^3), a(b^3)a}
        
        {a, b, ab, ba, b(a^3), b(a^3)b}
        
        {a, b, ab, ba, b(a^3), b(a^2)ba}
        
        {a, b, ab, ba, b(a^3), babab}
        
        {a, b, ab, ba, b(a^3), ba(b^2)a}
      - {a, b, ab, ba, b(a^2)b} (13 descendants)
        
        {a, b, ab, ba, b(a^2)b, baba}
        
        {a, b, ab, ba, ba(b^2), b(a^2)b}
        
        {a, b, ab, ba, b(a^2)b, b^2ab}
        
        {a, b, ab, ba, b^3a, b(a^2)b}
        
        {a, b, ab, ba, b(a^2)b, ab(a^2)b}
        
        {a, b, ab, ba, b(a^2)b, ababa}
        
        {a, b, ab, ba, b(a^2)b, a(b^2)ab}
        
        {a, b, ab, ba, a(b^3)a, b(a^2)b}
        
        {a, b, ab, ba, b(a^2)b, b(a^3)b}
        
        {a, b, ab, ba, b(a^2)b, b(a^2)ba}
        
        {a, b, ab, ba, b(a^2)b, babab}
        
        {a, b, ab, ba, b(a^2)b, ba(b^2)a}
        
        {a, b, ab, ba, b(a^2)b, b(a^2)b(a^2)b}
      - {a, b, ab, ba, baba} (11 descendants)
        
        {a, b, ab, ba, ba(b^2), baba}
        
        {a, b, ab, ba, b^2ab, baba}
        
        {a, b, ab, ba, b^3a, baba}
        
        {a, b, ab, ba, ab(a^2)b, baba}
        
        {a, b, ab, ba, baba, ababa}
        
        {a, b, ab, ba, a(b^2)ab, baba}
        
        {a, b, ab, ba, a(b^3)a, baba}
        
        {a, b, ab, ba, b(a^3)b, baba}
        
        {a, b, ab, ba, baba, b(a^2)ba}
        
        {a, b, ab, ba, baba, babab}
        
        {a, b, ab, ba, baba, ba(b^2)a}
      - {a, b, ab, ba, ba(b^2)} (10 descendants)
        
        {a, b, ab, ba, ba(b^2), b^2ab}
        
        {a, b, ab, ba, b^3a, ba(b^2)}
        
        {a, b, ab, ba, ba(b^2), ab(a^2)b}
        
        {a, b, ab, ba, ba(b^2), ababa}
        
        {a, b, ab, ba, ba(b^2), a(b^2)ab}
        
        {a, b, ab, ba, a(b^3)a, ba(b^2)}
        
        {a, b, ab, ba, ba(b^2), b(a^3)b}
        
        {a, b, ab, ba, ba(b^2), b(a^2)ba}
        
        {a, b, ab, ba, ba(b^2), babab}
        
        {a, b, ab, ba, ba(b^2), ba(b^2)a}
      - {a, b, ab, ba, b^2ab} (9 descendants)
        
        {a, b, ab, ba, b^3a, b^2ab}
        
        {a, b, ab, ba, b^2ab, ab(a^2)b}
        
        {a, b, ab, ba, b^2ab, ababa}
        
        {a, b, ab, ba, b^2ab, a(b^2)ab}
        
        {a, b, ab, ba, a(b^3)a, b^2ab}
        
        {a, b, ab, ba, b(a^3)b, b^2ab}
        
        {a, b, ab, ba, b^2ab, b(a^2)ba}
        
        {a, b, ab, ba, b^2ab, babab}
        
        {a, b, ab, ba, b^2ab, ba(b^2)a}
      - {a, b, ab, ba, b^3a} (8 descendants)
        
        {a, b, ab, ba, b^3a, ab(a^2)b}
        
        {a, b, ab, ba, b^3a, ababa}
        
        {a, b, ab, ba, b^3a, a(b^2)ab}
        
        {a, b, ab, ba, b^3a, a(b^3)a}
        
        {a, b, ab, ba, b^3a, b(a^3)b}
        
        {a, b, ab, ba, b^3a, b(a^2)ba}
        
        {a, b, ab, ba, b^3a, babab}
        
        {a, b, ab, ba, b^3a, ba(b^2)a}
      - {a, b, ab, ba, ab(a^2)b} (7 descendants)
        
        {a, b, ab, ba, ab(a^2)b, ababa}
        
        {a, b, ab, ba, ab(a^2)b, a(b^2)ab}
        
        {a, b, ab, ba, a(b^3)a, ab(a^2)b}
        
        {a, b, ab, ba, b(a^3)b, ab(a^2)b}
        
        {a, b, ab, ba, ab(a^2)b, b(a^2)ba}
        
        {a, b, ab, ba, ab(a^2)b, babab}
        
        {a, b, ab, ba, ab(a^2)b, ba(b^2)a}
      - {a, b, ab, ba, ababa} (6 descendants)
        
        {a, b, ab, ba, a(b^2)ab, ababa}
        
        {a, b, ab, ba, a(b^3)a, ababa}
        
        {a, b, ab, ba, b(a^3)b, ababa}
        
        {a, b, ab, ba, b(a^2)ba, ababa}
        
        {a, b, ab, ba, ababa, babab}
        
        {a, b, ab, ba, ba(b^2)a, ababa}
      - {a, b, ab, ba, a(b^2)ab} (5 descendants)
        
        {a, b, ab, ba, a(b^3)a, a(b^2)ab}
        
        {a, b, ab, ba, b(a^3)b, a(b^2)ab}
        
        {a, b, ab, ba, a(b^2)ab, b(a^2)ba}
        
        {a, b, ab, ba, a(b^2)ab, babab}
        
        {a, b, ab, ba, a(b^2)ab, ba(b^2)a}
      - {a, b, ab, ba, a(b^3)a} (4 descendants)
        
        {a, b, ab, ba, a(b^3)a, b(a^3)b}
        
        {a, b, ab, ba, a(b^3)a, b(a^2)ba}
        
        {a, b, ab, ba, a(b^3)a, babab}
        
        {a, b, ab, ba, a(b^3)a, ba(b^2)a}
      - {a, b, ab, ba, b(a^3)b} (3 descendants)
        
        {a, b, ab, ba, b(a^3)b, b(a^2)ba}
        
        {a, b, ab, ba, b(a^3)b, babab}
        
        {a, b, ab, ba, b(a^3)b, ba(b^2)a}
      - {a, b, ab, ba, b(a^2)ba} (2 descendants)
        
        {a, b, ab, ba, b(a^2)ba, babab}
        
        {a, b, ab, ba, ba(b^2)a, b(a^2)ba}
      - {a, b, ab, ba, babab} (1 descendant)
        
        {a, b, ab, ba, ba(b^2)a, babab}
      - {a, b, ab, ba, ba(b^2)a} (0 descendants)
    - {a, b, b^2, ab} (28 descendants)
      - {a, b, a^3, b^2, ab} (28 descendants)
        
        {a, b, a^3, b^2, ab, a^2b}
        
        {a, b, a^3, b^2, ab, aba}
        
        {a, b, a^3, b^2, ab, a(b^2)}
        
        {a, b, a^3, b^2, ab, b(a^2)}
        
        {a, b, a^3, b^2, ab, bab}
        
        {a, b, a^3, b^2, ab, b^2a}
        
        {a, b, a^3, b^2, b^3, ab}
        
        {a, b, a^3, b^2, ab, a^3b}
        
        {a, b, a^3, b^2, ab, a^2(b^2)}
        
        {a, b, a^3, b^2, ab, ab(a^2)}
        
        {a, b, a^3, b^2, ab, abab}
        
        {a, b, a^3, b^2, ab, a(b^2)a}
        
        {a, b, a^3, b^2, ab, a(b^3)}
        
        {a, b, a^3, b^2, ab, b(a^2)b}
        
        {a, b, a^3, b^2, ab, ba(b^2)}
        
        {a, b, a^3, b^2, ab, b^2(a^2)}
        
        {a, b, a^3, b^2, ab, b^2ab}
        
        {a, b, a^3, b^2, ab, b^3a}
        
        {a, b, a^3, b^2, b^4, ab}
        
        {a, b, a^3, a^5, b^2, ab}
        
        {a, b, a^3, b^2, ab, ab(a^2)b}
        
        {a, b, a^3, b^2, ab, aba(b^2)}
        
        {a, b, a^3, b^2, ab, a(b^2)ab}
        
        {a, b, a^3, b^2, ab, a(b^4)}
        
        {a, b, a^3, b^2, ab, b^2(a^2)b}
        
        {a, b, a^3, b^2, ab, b^2a(b^2)}
        
        {a, b, a^3, b^2, ab, b^3ab}
        
        {a, b, a^3, b^2, b^5, ab}
      - {a, b, b^2, ab, a^2b} (32 descendants)
        
        {a, b, b^2, ab, a^2b, aba}
        
        {a, b, b^2, ab, a(b^2), a^2b}
        
        {a, b, b^2, ab, b(a^2), a^2b}
        
        {a, b, b^2, ab, a^2b, bab}
        
        {a, b, b^2, ab, a^2b, b^2a}
        
        {a, b, b^2, b^3, ab, a^2b}
        
        {a, b, b^2, ab, a^2b, a^3b}
        
        {a, b, b^2, ab, a^2b, a^2(b^2)}
        
        {a, b, b^2, ab, a^2b, ab(a^2)}
        
        {a, b, b^2, ab, a^2b, abab}
        
        {a, b, b^2, ab, a^2b, a(b^2)a}
        
        {a, b, b^2, ab, a(b^3), a^2b}
        
        {a, b, b^2, ab, a^2b, b(a^2)b}
        
        {a, b, b^2, ab, a^2b, ba(b^2)}
        
        {a, b, b^2, ab, a^2b, b^2(a^2)}
        
        {a, b, b^2, ab, a^2b, b^2ab}
        
        {a, b, b^2, ab, a^2b, b^3a}
        
        {a, b, b^2, b^4, ab, a^2b}
        
        {a, b, b^2, ab, a^2b, a^4b}
        
        {a, b, b^2, ab, a^2b, ab(a^2)b}
        
        {a, b, b^2, ab, a^2b, aba(b^2)}
        
        {a, b, b^2, ab, a^2b, a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), a^2b}
        
        {a, b, b^2, ab, a^2b, b(a^3)b}
        
        {a, b, b^2, ab, a^2b, b^2(a^2)b}
        
        {a, b, b^2, ab, a^2b, b^2a(b^2)}
        
        {a, b, b^2, ab, a^2b, b^3ab}
        
        {a, b, b^2, b^5, ab, a^2b}
        
        {a, b, b^2, ab, a^2b, ab(a^3)b}
        
        {a, b, b^2, ab, a^2b, a(b^2)(a^2)b}
        
        {a, b, b^2, ab, a^2b, b^2(a^3)b}
        
        {a, b, b^2, ab, a^2b, b^3(a^2)b}
      - {a, b, b^2, ab, aba} (31 descendants)
        
        {a, b, b^2, ab, a(b^2), aba}
        
        {a, b, b^2, ab, b(a^2), aba}
        
        {a, b, b^2, ab, aba, bab}
        
        {a, b, b^2, ab, b^2a, aba}
        
        {a, b, b^2, b^3, ab, aba}
        
        {a, b, b^2, ab, a^3b, aba}
        
        {a, b, b^2, ab, a^2(b^2), aba}
        
        {a, b, b^2, ab, aba, ab(a^2)}
        
        {a, b, b^2, ab, aba, abab}
        
        {a, b, b^2, ab, aba, a(b^2)a}
        
        {a, b, b^2, ab, a(b^3), aba}
        
        {a, b, b^2, ab, aba, b(a^2)b}
        
        {a, b, b^2, ab, aba, ba(b^2)}
        
        {a, b, b^2, ab, b^2(a^2), aba}
        
        {a, b, b^2, ab, aba, b^2ab}
        
        {a, b, b^2, ab, b^3a, aba}
        
        {a, b, b^2, b^4, ab, aba}
        
        {a, b, b^2, ab, aba, ab(a^3)}
        
        {a, b, b^2, ab, aba, ab(a^2)b}
        
        {a, b, b^2, ab, aba, ababa}
        
        {a, b, b^2, ab, aba, aba(b^2)}
        
        {a, b, b^2, ab, aba, a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), aba}
        
        {a, b, b^2, ab, aba, b^2(a^2)b}
        
        {a, b, b^2, ab, aba, b^2a(b^2)}
        
        {a, b, b^2, ab, aba, b^3ab}
        
        {a, b, b^2, b^5, ab, aba}
        
        {a, b, b^2, ab, aba, ab(a^3)b}
        
        {a, b, b^2, ab, aba, ab(a^2)(b^2)}
        
        {a, b, b^2, ab, aba, ababab}
        
        {a, b, b^2, ab, aba, aba(b^3)}
      - {a, b, b^2, ab, a(b^2)} (37 descendants)
        
        {a, b, b^2, ab, a(b^2), b(a^2)}
        
        {a, b, b^2, ab, a(b^2), bab}
        
        {a, b, b^2, ab, a(b^2), b^2a}
        
        {a, b, b^2, b^3, ab, a(b^2)}
        
        {a, b, b^2, ab, a(b^2), a^3b}
        
        {a, b, b^2, ab, a(b^2), a^2(b^2)}
        
        {a, b, b^2, ab, a(b^2), ab(a^2)}
        
        {a, b, b^2, ab, a(b^2), abab}
        
        {a, b, b^2, ab, a(b^2), a(b^2)a}
        
        {a, b, b^2, ab, a(b^2), a(b^3)}
        
        {a, b, b^2, ab, a(b^2), b(a^2)b}
        
        {a, b, b^2, ab, a(b^2), ba(b^2)}
        
        {a, b, b^2, ab, a(b^2), b^2(a^2)}
        
        {a, b, b^2, ab, a(b^2), b^2ab}
        
        {a, b, b^2, ab, a(b^2), b^3a}
        
        {a, b, b^2, b^4, ab, a(b^2)}
        
        {a, b, b^2, ab, a(b^2), a^3(b^2)}
        
        {a, b, b^2, ab, a(b^2), ab(a^2)b}
        
        {a, b, b^2, ab, a(b^2), aba(b^2)}
        
        {a, b, b^2, ab, a(b^2), a(b^2)(a^2)}
        
        {a, b, b^2, ab, a(b^2), a(b^2)ab}
        
        {a, b, b^2, ab, a(b^2), a(b^3)a}
        
        {a, b, b^2, ab, a(b^2), a(b^4)}
        
        {a, b, b^2, ab, a(b^2), b(a^2)(b^2)}
        
        {a, b, b^2, ab, a(b^2), b^2(a^2)b}
        
        {a, b, b^2, ab, a(b^2), b^2a(b^2)}
        
        {a, b, b^2, ab, a(b^2), b^3ab}
        
        {a, b, b^2, b^5, ab, a(b^2)}
        
        {a, b, b^2, ab, a(b^2), ab(a^2)(b^2)}
        
        {a, b, b^2, ab, a(b^2), a(b^2)(a^2)b}
        
        {a, b, b^2, ab, a(b^2), a(b^2)a(b^2)}
        
        {a, b, b^2, ab, a(b^2), a(b^3)ab}
        
        {a, b, b^2, ab, a(b^2), a(b^5)}
        
        {a, b, b^2, ab, a(b^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, ab, a(b^2), b^3a(b^2)}
        
        {a, b, b^2, ab, a(b^2), a(b^2)(a^2)(b^2)}
        
        {a, b, b^2, ab, a(b^2), a(b^3)a(b^2)}
      - {a, b, b^2, ab, b(a^2)} (23 descendants)
        
        {a, b, b^2, ab, b(a^2), bab}
        
        {a, b, b^2, ab, b(a^2), b^2a}
        
        {a, b, b^2, b^3, ab, b(a^2)}
        
        {a, b, b^2, ab, b(a^2), a^3b}
        
        {a, b, b^2, ab, b(a^2), a^2(b^2)}
        
        {a, b, b^2, ab, b(a^2), ab(a^2)}
        
        {a, b, b^2, ab, b(a^2), abab}
        
        {a, b, b^2, ab, b(a^2), a(b^2)a}
        
        {a, b, b^2, ab, a(b^3), b(a^2)}
        
        {a, b, b^2, ab, b(a^2), b(a^2)b}
        
        {a, b, b^2, ab, b(a^2), ba(b^2)}
        
        {a, b, b^2, ab, b(a^2), b^2(a^2)}
        
        {a, b, b^2, ab, b(a^2), b^2ab}
        
        {a, b, b^2, ab, b(a^2), b^3a}
        
        {a, b, b^2, b^4, ab, b(a^2)}
        
        {a, b, b^2, ab, b(a^2), ab(a^2)b}
        
        {a, b, b^2, ab, b(a^2), aba(b^2)}
        
        {a, b, b^2, ab, b(a^2), a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), b(a^2)}
        
        {a, b, b^2, ab, b(a^2), b^2(a^2)b}
        
        {a, b, b^2, ab, b(a^2), b^2a(b^2)}
        
        {a, b, b^2, ab, b(a^2), b^3ab}
        
        {a, b, b^2, b^5, ab, b(a^2)}
      - {a, b, b^2, ab, bab} (28 descendants)
        
        {a, b, b^2, ab, b^2a, bab}
        
        {a, b, b^2, b^3, ab, bab}
        
        {a, b, b^2, ab, a^3b, bab}
        
        {a, b, b^2, ab, a^2(b^2), bab}
        
        {a, b, b^2, ab, ab(a^2), bab}
        
        {a, b, b^2, ab, bab, abab}
        
        {a, b, b^2, ab, a(b^2)a, bab}
        
        {a, b, b^2, ab, a(b^3), bab}
        
        {a, b, b^2, ab, bab, b(a^2)b}
        
        {a, b, b^2, ab, bab, ba(b^2)}
        
        {a, b, b^2, ab, b^2(a^2), bab}
        
        {a, b, b^2, ab, bab, b^2ab}
        
        {a, b, b^2, ab, b^3a, bab}
        
        {a, b, b^2, b^4, ab, bab}
        
        {a, b, b^2, ab, bab, a^2bab}
        
        {a, b, b^2, ab, bab, ab(a^2)b}
        
        {a, b, b^2, ab, bab, aba(b^2)}
        
        {a, b, b^2, ab, bab, a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), bab}
        
        {a, b, b^2, ab, bab, babab}
        
        {a, b, b^2, ab, bab, b^2(a^2)b}
        
        {a, b, b^2, ab, bab, b^2a(b^2)}
        
        {a, b, b^2, ab, bab, b^3ab}
        
        {a, b, b^2, b^5, ab, bab}
        
        {a, b, b^2, ab, bab, ababab}
        
        {a, b, b^2, ab, bab, a(b^3)ab}
        
        {a, b, b^2, ab, bab, b^2abab}
        
        {a, b, b^2, ab, bab, b^4ab}
      - {a, b, b^2, ab, b^2a} (27 descendants)
        
        {a, b, b^2, b^3, ab, b^2a}
        
        {a, b, b^2, ab, a^3b, b^2a}
        
        {a, b, b^2, ab, a^2(b^2), b^2a}
        
        {a, b, b^2, ab, b^2a, ab(a^2)}
        
        {a, b, b^2, ab, b^2a, abab}
        
        {a, b, b^2, ab, b^2a, a(b^2)a}
        
        {a, b, b^2, ab, a(b^3), b^2a}
        
        {a, b, b^2, ab, b^2a, b(a^2)b}
        
        {a, b, b^2, ab, b^2a, ba(b^2)}
        
        {a, b, b^2, ab, b^2a, b^2(a^2)}
        
        {a, b, b^2, ab, b^2a, b^2ab}
        
        {a, b, b^2, ab, b^2a, b^3a}
        
        {a, b, b^2, b^4, ab, b^2a}
        
        {a, b, b^2, ab, b^2a, ab(a^2)b}
        
        {a, b, b^2, ab, b^2a, aba(b^2)}
        
        {a, b, b^2, ab, b^2a, a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), b^2a}
        
        {a, b, b^2, ab, b^2a, b^2(a^3)}
        
        {a, b, b^2, ab, b^2a, b^2(a^2)b}
        
        {a, b, b^2, ab, b^2a, b^2aba}
        
        {a, b, b^2, ab, b^2a, b^2a(b^2)}
        
        {a, b, b^2, ab, b^2a, b^3ab}
        
        {a, b, b^2, b^5, ab, b^2a}
        
        {a, b, b^2, ab, b^2a, b^2(a^3)b}
        
        {a, b, b^2, ab, b^2a, b^2(a^2)(b^2)}
        
        {a, b, b^2, ab, b^2a, b^2abab}
        
        {a, b, b^2, ab, b^2a, b^2a(b^3)}
      - {a, b, b^2, b^3, ab} (33 descendants)
        
        {a, b, b^2, b^3, ab, a^3b}
        
        {a, b, b^2, b^3, ab, a^2(b^2)}
        
        {a, b, b^2, b^3, ab, ab(a^2)}
        
        {a, b, b^2, b^3, ab, abab}
        
        {a, b, b^2, b^3, ab, a(b^2)a}
        
        {a, b, b^2, b^3, ab, a(b^3)}
        
        {a, b, b^2, b^3, ab, b(a^2)b}
        
        {a, b, b^2, b^3, ab, ba(b^2)}
        
        {a, b, b^2, b^3, ab, b^2(a^2)}
        
        {a, b, b^2, b^3, ab, b^2ab}
        
        {a, b, b^2, b^3, ab, b^3a}
        
        {a, b, b^2, b^3, b^4, ab}
        
        {a, b, b^2, b^3, ab, a^2(b^3)}
        
        {a, b, b^2, b^3, ab, ab(a^2)b}
        
        {a, b, b^2, b^3, ab, aba(b^2)}
        
        {a, b, b^2, b^3, ab, a(b^2)ab}
        
        {a, b, b^2, b^3, ab, a(b^4)}
        
        {a, b, b^2, b^3, ab, ba(b^3)}
        
        {a, b, b^2, b^3, ab, b^2(a^2)b}
        
        {a, b, b^2, b^3, ab, b^2a(b^2)}
        
        {a, b, b^2, b^3, ab, b^3(a^2)}
        
        {a, b, b^2, b^3, ab, b^3ab}
        
        {a, b, b^2, b^3, ab, b^4a}
        
        {a, b, b^2, b^3, b^5, ab}
        
        {a, b, b^2, b^3, ab, aba(b^3)}
        
        {a, b, b^2, b^3, ab, a(b^5)}
        
        {a, b, b^2, b^3, ab, b^2a(b^3)}
        
        {a, b, b^2, b^3, ab, b^3(a^2)b}
        
        {a, b, b^2, b^3, ab, b^3a(b^2)}
        
        {a, b, b^2, b^3, ab, b^4ab}
        
        {a, b, b^2, b^3, b^6, ab}
        
        {a, b, b^2, b^3, ab, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, ab}
      - {a, b, b^2, ab, a^3b} (19 descendants)
        
        {a, b, b^2, ab, a^2(b^2), a^3b}
        
        {a, b, b^2, ab, a^3b, ab(a^2)}
        
        {a, b, b^2, ab, a^3b, abab}
        
        {a, b, b^2, ab, a^3b, a(b^2)a}
        
        {a, b, b^2, ab, a(b^3), a^3b}
        
        {a, b, b^2, ab, a^3b, b(a^2)b}
        
        {a, b, b^2, ab, a^3b, ba(b^2)}
        
        {a, b, b^2, ab, a^3b, b^2(a^2)}
        
        {a, b, b^2, ab, a^3b, b^2ab}
        
        {a, b, b^2, ab, a^3b, b^3a}
        
        {a, b, b^2, b^4, ab, a^3b}
        
        {a, b, b^2, ab, a^3b, ab(a^2)b}
        
        {a, b, b^2, ab, a^3b, aba(b^2)}
        
        {a, b, b^2, ab, a^3b, a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), a^3b}
        
        {a, b, b^2, ab, a^3b, b^2(a^2)b}
        
        {a, b, b^2, ab, a^3b, b^2a(b^2)}
        
        {a, b, b^2, ab, a^3b, b^3ab}
        
        {a, b, b^2, b^5, ab, a^3b}
      - {a, b, b^2, ab, a^2(b^2)} (18 descendants)
        
        {a, b, b^2, ab, a^2(b^2), ab(a^2)}
        
        {a, b, b^2, ab, a^2(b^2), abab}
        
        {a, b, b^2, ab, a^2(b^2), a(b^2)a}
        
        {a, b, b^2, ab, a(b^3), a^2(b^2)}
        
        {a, b, b^2, ab, a^2(b^2), b(a^2)b}
        
        {a, b, b^2, ab, a^2(b^2), ba(b^2)}
        
        {a, b, b^2, ab, a^2(b^2), b^2(a^2)}
        
        {a, b, b^2, ab, a^2(b^2), b^2ab}
        
        {a, b, b^2, ab, a^2(b^2), b^3a}
        
        {a, b, b^2, b^4, ab, a^2(b^2)}
        
        {a, b, b^2, ab, a^2(b^2), ab(a^2)b}
        
        {a, b, b^2, ab, a^2(b^2), aba(b^2)}
        
        {a, b, b^2, ab, a^2(b^2), a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), a^2(b^2)}
        
        {a, b, b^2, ab, a^2(b^2), b^2(a^2)b}
        
        {a, b, b^2, ab, a^2(b^2), b^2a(b^2)}
        
        {a, b, b^2, ab, a^2(b^2), b^3ab}
        
        {a, b, b^2, b^5, ab, a^2(b^2)}
      - {a, b, b^2, ab, ab(a^2)} (17 descendants)
        
        {a, b, b^2, ab, ab(a^2), abab}
        
        {a, b, b^2, ab, ab(a^2), a(b^2)a}
        
        {a, b, b^2, ab, a(b^3), ab(a^2)}
        
        {a, b, b^2, ab, ab(a^2), b(a^2)b}
        
        {a, b, b^2, ab, ab(a^2), ba(b^2)}
        
        {a, b, b^2, ab, b^2(a^2), ab(a^2)}
        
        {a, b, b^2, ab, ab(a^2), b^2ab}
        
        {a, b, b^2, ab, b^3a, ab(a^2)}
        
        {a, b, b^2, b^4, ab, ab(a^2)}
        
        {a, b, b^2, ab, ab(a^2), ab(a^2)b}
        
        {a, b, b^2, ab, ab(a^2), aba(b^2)}
        
        {a, b, b^2, ab, ab(a^2), a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), ab(a^2)}
        
        {a, b, b^2, ab, ab(a^2), b^2(a^2)b}
        
        {a, b, b^2, ab, ab(a^2), b^2a(b^2)}
        
        {a, b, b^2, ab, ab(a^2), b^3ab}
        
        {a, b, b^2, b^5, ab, ab(a^2)}
      - {a, b, b^2, ab, abab} (16 descendants)
        
        {a, b, b^2, ab, a(b^2)a, abab}
        
        {a, b, b^2, ab, a(b^3), abab}
        
        {a, b, b^2, ab, b(a^2)b, abab}
        
        {a, b, b^2, ab, ba(b^2), abab}
        
        {a, b, b^2, ab, b^2(a^2), abab}
        
        {a, b, b^2, ab, b^2ab, abab}
        
        {a, b, b^2, ab, b^3a, abab}
        
        {a, b, b^2, b^4, ab, abab}
        
        {a, b, b^2, ab, abab, ab(a^2)b}
        
        {a, b, b^2, ab, abab, aba(b^2)}
        
        {a, b, b^2, ab, abab, a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), abab}
        
        {a, b, b^2, ab, b^2(a^2)b, abab}
        
        {a, b, b^2, ab, b^2a(b^2), abab}
        
        {a, b, b^2, ab, b^3ab, abab}
        
        {a, b, b^2, b^5, ab, abab}
      - {a, b, b^2, ab, a(b^2)a} (15 descendants)
        
        {a, b, b^2, ab, a(b^3), a(b^2)a}
        
        {a, b, b^2, ab, a(b^2)a, b(a^2)b}
        
        {a, b, b^2, ab, a(b^2)a, ba(b^2)}
        
        {a, b, b^2, ab, b^2(a^2), a(b^2)a}
        
        {a, b, b^2, ab, a(b^2)a, b^2ab}
        
        {a, b, b^2, ab, b^3a, a(b^2)a}
        
        {a, b, b^2, b^4, ab, a(b^2)a}
        
        {a, b, b^2, ab, a(b^2)a, ab(a^2)b}
        
        {a, b, b^2, ab, a(b^2)a, aba(b^2)}
        
        {a, b, b^2, ab, a(b^2)a, a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), a(b^2)a}
        
        {a, b, b^2, ab, a(b^2)a, b^2(a^2)b}
        
        {a, b, b^2, ab, a(b^2)a, b^2a(b^2)}
        
        {a, b, b^2, ab, a(b^2)a, b^3ab}
        
        {a, b, b^2, b^5, ab, a(b^2)a}
      - {a, b, b^2, ab, a(b^3)} (14 descendants)
        
        {a, b, b^2, ab, a(b^3), b(a^2)b}
        
        {a, b, b^2, ab, a(b^3), ba(b^2)}
        
        {a, b, b^2, ab, a(b^3), b^2(a^2)}
        
        {a, b, b^2, ab, a(b^3), b^2ab}
        
        {a, b, b^2, ab, a(b^3), b^3a}
        
        {a, b, b^2, b^4, ab, a(b^3)}
        
        {a, b, b^2, ab, a(b^3), ab(a^2)b}
        
        {a, b, b^2, ab, a(b^3), aba(b^2)}
        
        {a, b, b^2, ab, a(b^3), a(b^2)ab}
        
        {a, b, b^2, ab, a(b^3), a(b^4)}
        
        {a, b, b^2, ab, a(b^3), b^2(a^2)b}
        
        {a, b, b^2, ab, a(b^3), b^2a(b^2)}
        
        {a, b, b^2, ab, a(b^3), b^3ab}
        
        {a, b, b^2, b^5, ab, a(b^3)}
      - {a, b, b^2, ab, b(a^2)b} (13 descendants)
        
        {a, b, b^2, ab, ba(b^2), b(a^2)b}
        
        {a, b, b^2, ab, b^2(a^2), b(a^2)b}
        
        {a, b, b^2, ab, b(a^2)b, b^2ab}
        
        {a, b, b^2, ab, b^3a, b(a^2)b}
        
        {a, b, b^2, b^4, ab, b(a^2)b}
        
        {a, b, b^2, ab, b(a^2)b, ab(a^2)b}
        
        {a, b, b^2, ab, b(a^2)b, aba(b^2)}
        
        {a, b, b^2, ab, b(a^2)b, a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), b(a^2)b}
        
        {a, b, b^2, ab, b(a^2)b, b^2(a^2)b}
        
        {a, b, b^2, ab, b(a^2)b, b^2a(b^2)}
        
        {a, b, b^2, ab, b(a^2)b, b^3ab}
        
        {a, b, b^2, b^5, ab, b(a^2)b}
      - {a, b, b^2, ab, ba(b^2)} (12 descendants)
        
        {a, b, b^2, ab, b^2(a^2), ba(b^2)}
        
        {a, b, b^2, ab, ba(b^2), b^2ab}
        
        {a, b, b^2, ab, b^3a, ba(b^2)}
        
        {a, b, b^2, b^4, ab, ba(b^2)}
        
        {a, b, b^2, ab, ba(b^2), ab(a^2)b}
        
        {a, b, b^2, ab, ba(b^2), aba(b^2)}
        
        {a, b, b^2, ab, ba(b^2), a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), ba(b^2)}
        
        {a, b, b^2, ab, ba(b^2), b^2(a^2)b}
        
        {a, b, b^2, ab, ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, ab, ba(b^2), b^3ab}
        
        {a, b, b^2, b^5, ab, ba(b^2)}
      - {a, b, b^2, ab, b^2(a^2)} (11 descendants)
        
        {a, b, b^2, ab, b^2(a^2), b^2ab}
        
        {a, b, b^2, ab, b^2(a^2), b^3a}
        
        {a, b, b^2, b^4, ab, b^2(a^2)}
        
        {a, b, b^2, ab, b^2(a^2), ab(a^2)b}
        
        {a, b, b^2, ab, b^2(a^2), aba(b^2)}
        
        {a, b, b^2, ab, b^2(a^2), a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), b^2(a^2)}
        
        {a, b, b^2, ab, b^2(a^2), b^2(a^2)b}
        
        {a, b, b^2, ab, b^2(a^2), b^2a(b^2)}
        
        {a, b, b^2, ab, b^2(a^2), b^3ab}
        
        {a, b, b^2, b^5, ab, b^2(a^2)}
      - {a, b, b^2, ab, b^2ab} (11 descendants)
        
        {a, b, b^2, ab, b^3a, b^2ab}
        
        {a, b, b^2, b^4, ab, b^2ab}
        
        {a, b, b^2, ab, b^2ab, ab(a^2)b}
        
        {a, b, b^2, ab, b^2ab, aba(b^2)}
        
        {a, b, b^2, ab, b^2ab, a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), b^2ab}
        
        {a, b, b^2, ab, b^2ab, b^2(a^2)b}
        
        {a, b, b^2, ab, b^2ab, b^2a(b^2)}
        
        {a, b, b^2, ab, b^2ab, b^3ab}
        
        {a, b, b^2, b^5, ab, b^2ab}
        
        {a, b, b^2, ab, b^2ab, b^2a(b^2)ab}
      - {a, b, b^2, ab, b^3a} (9 descendants)
        
        {a, b, b^2, b^4, ab, b^3a}
        
        {a, b, b^2, ab, b^3a, ab(a^2)b}
        
        {a, b, b^2, ab, b^3a, aba(b^2)}
        
        {a, b, b^2, ab, b^3a, a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), b^3a}
        
        {a, b, b^2, ab, b^3a, b^2(a^2)b}
        
        {a, b, b^2, ab, b^3a, b^2a(b^2)}
        
        {a, b, b^2, ab, b^3a, b^3ab}
        
        {a, b, b^2, b^5, ab, b^3a}
      - {a, b, b^2, b^4, ab} (9 descendants)
        
        {a, b, b^2, b^4, ab, ab(a^2)b}
        
        {a, b, b^2, b^4, ab, aba(b^2)}
        
        {a, b, b^2, b^4, ab, a(b^2)ab}
        
        {a, b, b^2, b^4, ab, a(b^4)}
        
        {a, b, b^2, b^4, ab, b^2(a^2)b}
        
        {a, b, b^2, b^4, ab, b^2a(b^2)}
        
        {a, b, b^2, b^4, ab, b^3ab}
        
        {a, b, b^2, b^4, b^5, ab}
        
        {a, b, b^2, b^4, b^7, ab}
      - {a, b, b^2, ab, ab(a^2)b} (7 descendants)
        
        {a, b, b^2, ab, aba(b^2), ab(a^2)b}
        
        {a, b, b^2, ab, ab(a^2)b, a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), ab(a^2)b}
        
        {a, b, b^2, ab, b^2(a^2)b, ab(a^2)b}
        
        {a, b, b^2, ab, b^2a(b^2), ab(a^2)b}
        
        {a, b, b^2, ab, b^3ab, ab(a^2)b}
        
        {a, b, b^2, b^5, ab, ab(a^2)b}
      - {a, b, b^2, ab, aba(b^2)} (6 descendants)
        
        {a, b, b^2, ab, aba(b^2), a(b^2)ab}
        
        {a, b, b^2, ab, a(b^4), aba(b^2)}
        
        {a, b, b^2, ab, b^2(a^2)b, aba(b^2)}
        
        {a, b, b^2, ab, b^2a(b^2), aba(b^2)}
        
        {a, b, b^2, ab, b^3ab, aba(b^2)}
        
        {a, b, b^2, b^5, ab, aba(b^2)}
      - {a, b, b^2, ab, a(b^2)ab} (5 descendants)
        
        {a, b, b^2, ab, a(b^4), a(b^2)ab}
        
        {a, b, b^2, ab, b^2(a^2)b, a(b^2)ab}
        
        {a, b, b^2, ab, b^2a(b^2), a(b^2)ab}
        
        {a, b, b^2, ab, b^3ab, a(b^2)ab}
        
        {a, b, b^2, b^5, ab, a(b^2)ab}
      - {a, b, b^2, ab, a(b^4)} (4 descendants)
        
        {a, b, b^2, ab, a(b^4), b^2(a^2)b}
        
        {a, b, b^2, ab, a(b^4), b^2a(b^2)}
        
        {a, b, b^2, ab, a(b^4), b^3ab}
        
        {a, b, b^2, b^5, ab, a(b^4)}
      - {a, b, b^2, ab, b^2(a^2)b} (3 descendants)
        
        {a, b, b^2, ab, b^2a(b^2), b^2(a^2)b}
        
        {a, b, b^2, ab, b^2(a^2)b, b^3ab}
        
        {a, b, b^2, b^5, ab, b^2(a^2)b}
      - {a, b, b^2, ab, b^2a(b^2)} (2 descendants)
        
        {a, b, b^2, ab, b^2a(b^2), b^3ab}
        
        {a, b, b^2, b^5, ab, b^2a(b^2)}
      - {a, b, b^2, ab, b^3ab} (1 descendant)
        
        {a, b, b^2, b^5, ab, b^3ab}
      - {a, b, b^2, b^5, ab} (0 descendants)
    - {a, b, a^3, ab} (17 descendants)
      - {a, b, a^3, ab, a^2b} (21 descendants)
        
        {a, b, a^3, ab, a^2b, aba}
        
        {a, b, a^3, ab, a(b^2), a^2b}
        
        {a, b, a^3, ab, b(a^2), a^2b}
        
        {a, b, a^3, ab, a^2b, bab}
        
        {a, b, a^3, ab, a^2b, b^2a}
        
        {a, b, a^3, b^3, ab, a^2b}
        
        {a, b, a^3, ab, a^2b, a^3b}
        
        {a, b, a^3, ab, a^2b, ab(a^2)}
        
        {a, b, a^3, ab, a^2b, abab}
        
        {a, b, a^3, ab, a^2b, a(b^2)a}
        
        {a, b, a^3, ab, a(b^3), a^2b}
        
        {a, b, a^3, ab, a^2b, b(a^2)b}
        
        {a, b, a^3, ab, a^2b, b^2ab}
        
        {a, b, a^3, a^5, ab, a^2b}
        
        {a, b, a^3, ab, a^2b, a^4b}
        
        {a, b, a^3, ab, a^2b, ab(a^2)b}
        
        {a, b, a^3, ab, a^2b, a(b^2)ab}
        
        {a, b, a^3, ab, a^2b, b(a^3)b}
        
        {a, b, a^3, ab, a^2b, b^2(a^2)b}
        
        {a, b, a^3, ab, a^2b, ab(a^3)b}
        
        {a, b, a^3, ab, a^2b, a(b^2)(a^2)b}
      - {a, b, a^3, ab, aba} (21 descendants)
        
        {a, b, a^3, ab, a(b^2), aba}
        
        {a, b, a^3, ab, b(a^2), aba}
        
        {a, b, a^3, ab, aba, bab}
        
        {a, b, a^3, ab, b^2a, aba}
        
        {a, b, a^3, b^3, ab, aba}
        
        {a, b, a^3, ab, a^3b, aba}
        
        {a, b, a^3, ab, aba, ab(a^2)}
        
        {a, b, a^3, ab, aba, abab}
        
        {a, b, a^3, ab, aba, a(b^2)a}
        
        {a, b, a^3, ab, a(b^3), aba}
        
        {a, b, a^3, ab, aba, b(a^2)b}
        
        {a, b, a^3, ab, aba, b^2ab}
        
        {a, b, a^3, a^5, ab, aba}
        
        {a, b, a^3, ab, aba, a^3ba}
        
        {a, b, a^3, ab, aba, ab(a^3)}
        
        {a, b, a^3, ab, aba, ab(a^2)b}
        
        {a, b, a^3, ab, aba, ababa}
        
        {a, b, a^3, ab, aba, aba(b^2)}
        
        {a, b, a^3, ab, aba, a(b^2)ab}
        
        {a, b, a^3, ab, aba, ab(a^3)b}
        
        {a, b, a^3, ab, aba, ababab}
      - {a, b, a^3, ab, a(b^2)} (20 descendants)
        
        {a, b, a^3, ab, a(b^2), b(a^2)}
        
        {a, b, a^3, ab, a(b^2), bab}
        
        {a, b, a^3, ab, a(b^2), b^2a}
        
        {a, b, a^3, b^3, ab, a(b^2)}
        
        {a, b, a^3, ab, a(b^2), a^3b}
        
        {a, b, a^3, ab, a(b^2), ab(a^2)}
        
        {a, b, a^3, ab, a(b^2), abab}
        
        {a, b, a^3, ab, a(b^2), a(b^2)a}
        
        {a, b, a^3, ab, a(b^2), a(b^3)}
        
        {a, b, a^3, ab, a(b^2), b(a^2)b}
        
        {a, b, a^3, ab, a(b^2), b^2ab}
        
        {a, b, a^3, a^5, ab, a(b^2)}
        
        {a, b, a^3, ab, a(b^2), a^3(b^2)}
        
        {a, b, a^3, ab, a(b^2), ab(a^2)b}
        
        {a, b, a^3, ab, a(b^2), a(b^2)(a^2)}
        
        {a, b, a^3, ab, a(b^2), a(b^2)ab}
        
        {a, b, a^3, ab, a(b^2), a(b^3)a}
        
        {a, b, a^3, ab, a(b^2), a(b^4)}
        
        {a, b, a^3, ab, a(b^2), a(b^2)(a^2)b}
        
        {a, b, a^3, ab, a(b^2), a(b^3)ab}
      - {a, b, a^3, ab, b(a^2)} (14 descendants)
        
        {a, b, a^3, ab, b(a^2), bab}
        
        {a, b, a^3, ab, b(a^2), b^2a}
        
        {a, b, a^3, b^3, ab, b(a^2)}
        
        {a, b, a^3, ab, b(a^2), a^3b}
        
        {a, b, a^3, ab, b(a^2), ab(a^2)}
        
        {a, b, a^3, ab, b(a^2), abab}
        
        {a, b, a^3, ab, b(a^2), a(b^2)a}
        
        {a, b, a^3, ab, a(b^3), b(a^2)}
        
        {a, b, a^3, ab, b(a^2), b(a^2)b}
        
        {a, b, a^3, ab, b(a^2), b^2ab}
        
        {a, b, a^3, a^5, ab, b(a^2)}
        
        {a, b, a^3, ab, b(a^2), ab(a^2)b}
        
        {a, b, a^3, ab, b(a^2), a(b^2)ab}
        
        {a, b, a^3, ab, b(a^2), b(a^4)}
      - {a, b, a^3, ab, bab} (17 descendants)
        
        {a, b, a^3, ab, b^2a, bab}
        
        {a, b, a^3, b^3, ab, bab}
        
        {a, b, a^3, ab, a^3b, bab}
        
        {a, b, a^3, ab, ab(a^2), bab}
        
        {a, b, a^3, ab, bab, abab}
        
        {a, b, a^3, ab, a(b^2)a, bab}
        
        {a, b, a^3, ab, a(b^3), bab}
        
        {a, b, a^3, ab, bab, b(a^2)b}
        
        {a, b, a^3, ab, bab, b^2ab}
        
        {a, b, a^3, a^5, ab, bab}
        
        {a, b, a^3, ab, bab, a^2bab}
        
        {a, b, a^3, ab, bab, ab(a^2)b}
        
        {a, b, a^3, ab, bab, a(b^2)ab}
        
        {a, b, a^3, ab, bab, babab}
        
        {a, b, a^3, ab, bab, b^3ab}
        
        {a, b, a^3, ab, bab, ababab}
        
        {a, b, a^3, ab, bab, a(b^3)ab}
      - {a, b, a^3, ab, b^2a} (12 descendants)
        
        {a, b, a^3, b^3, ab, b^2a}
        
        {a, b, a^3, ab, a^3b, b^2a}
        
        {a, b, a^3, ab, b^2a, ab(a^2)}
        
        {a, b, a^3, ab, b^2a, abab}
        
        {a, b, a^3, ab, b^2a, a(b^2)a}
        
        {a, b, a^3, ab, a(b^3), b^2a}
        
        {a, b, a^3, ab, b^2a, b(a^2)b}
        
        {a, b, a^3, ab, b^2a, b^2ab}
        
        {a, b, a^3, a^5, ab, b^2a}
        
        {a, b, a^3, ab, b^2a, ab(a^2)b}
        
        {a, b, a^3, ab, b^2a, a(b^2)ab}
        
        {a, b, a^3, ab, b^2a, b^2(a^3)}
      - {a, b, a^3, b^3, ab} (11 descendants)
        
        {a, b, a^3, b^3, ab, a^3b}
        
        {a, b, a^3, b^3, ab, ab(a^2)}
        
        {a, b, a^3, b^3, ab, abab}
        
        {a, b, a^3, b^3, ab, a(b^2)a}
        
        {a, b, a^3, b^3, ab, a(b^3)}
        
        {a, b, a^3, b^3, ab, b(a^2)b}
        
        {a, b, a^3, b^3, ab, b^2ab}
        
        {a, b, a^3, a^5, b^3, ab}
        
        {a, b, a^3, b^3, ab, ab(a^2)b}
        
        {a, b, a^3, b^3, ab, a(b^2)ab}
        
        {a, b, a^3, b^3, b^5, ab}
      - {a, b, a^3, ab, a^3b} (10 descendants)
        
        {a, b, a^3, ab, a^3b, ab(a^2)}
        
        {a, b, a^3, ab, a^3b, abab}
        
        {a, b, a^3, ab, a^3b, a(b^2)a}
        
        {a, b, a^3, ab, a(b^3), a^3b}
        
        {a, b, a^3, ab, a^3b, b(a^2)b}
        
        {a, b, a^3, ab, a^3b, b^2ab}
        
        {a, b, a^3, a^5, ab, a^3b}
        
        {a, b, a^3, ab, a^3b, ab(a^2)b}
        
        {a, b, a^3, ab, a^3b, a(b^2)ab}
        
        {a, b, a^3, ab, a^3b, a^5b}
      - {a, b, a^3, ab, ab(a^2)} (9 descendants)
        
        {a, b, a^3, ab, ab(a^2), abab}
        
        {a, b, a^3, ab, ab(a^2), a(b^2)a}
        
        {a, b, a^3, ab, a(b^3), ab(a^2)}
        
        {a, b, a^3, ab, ab(a^2), b(a^2)b}
        
        {a, b, a^3, ab, ab(a^2), b^2ab}
        
        {a, b, a^3, a^5, ab, ab(a^2)}
        
        {a, b, a^3, ab, ab(a^2), ab(a^2)b}
        
        {a, b, a^3, ab, ab(a^2), a(b^2)ab}
        
        {a, b, a^3, ab, ab(a^2), ab(a^4)}
      - {a, b, a^3, ab, abab} (8 descendants)
        
        {a, b, a^3, ab, a(b^2)a, abab}
        
        {a, b, a^3, ab, a(b^3), abab}
        
        {a, b, a^3, ab, b(a^2)b, abab}
        
        {a, b, a^3, ab, b^2ab, abab}
        
        {a, b, a^3, a^5, ab, abab}
        
        {a, b, a^3, ab, abab, ab(a^2)b}
        
        {a, b, a^3, ab, abab, a(b^2)ab}
        
        {a, b, a^3, ab, abab, a^3bab}
      - {a, b, a^3, ab, a(b^2)a} (7 descendants)
        
        {a, b, a^3, ab, a(b^3), a(b^2)a}
        
        {a, b, a^3, ab, a(b^2)a, b(a^2)b}
        
        {a, b, a^3, ab, a(b^2)a, b^2ab}
        
        {a, b, a^3, a^5, ab, a(b^2)a}
        
        {a, b, a^3, ab, a(b^2)a, ab(a^2)b}
        
        {a, b, a^3, ab, a(b^2)a, a(b^2)ab}
        
        {a, b, a^3, ab, a(b^2)a, a(b^2)(a^3)}
      - {a, b, a^3, ab, a(b^3)} (5 descendants)
        
        {a, b, a^3, ab, a(b^3), b(a^2)b}
        
        {a, b, a^3, ab, a(b^3), b^2ab}
        
        {a, b, a^3, a^5, ab, a(b^3)}
        
        {a, b, a^3, ab, a(b^3), ab(a^2)b}
        
        {a, b, a^3, ab, a(b^3), a(b^2)ab}
      - {a, b, a^3, ab, b(a^2)b} (4 descendants)
        
        {a, b, a^3, ab, b(a^2)b, b^2ab}
        
        {a, b, a^3, a^5, ab, b(a^2)b}
        
        {a, b, a^3, ab, b(a^2)b, ab(a^2)b}
        
        {a, b, a^3, ab, b(a^2)b, a(b^2)ab}
      - {a, b, a^3, ab, b^2ab} (3 descendants)
        
        {a, b, a^3, a^5, ab, b^2ab}
        
        {a, b, a^3, ab, b^2ab, ab(a^2)b}
        
        {a, b, a^3, ab, b^2ab, a(b^2)ab}
      - {a, b, a^3, a^5, ab} (3 descendants)
        
        {a, b, a^3, a^5, ab, ab(a^2)b}
        
        {a, b, a^3, a^5, ab, a(b^2)ab}
        
        {a, b, a^3, a^5, a^7, ab}
      - {a, b, a^3, ab, ab(a^2)b} (1 descendant)
        
        {a, b, a^3, ab, ab(a^2)b, a(b^2)ab}
      - {a, b, a^3, ab, a(b^2)ab} (0 descendants)
    - {a, b, ab, a^2b} (20 descendants)
      - {a, b, ab, a^2b, aba} (25 descendants)
        
        {a, b, ab, a(b^2), a^2b, aba}
        
        {a, b, ab, b(a^2), a^2b, aba}
        
        {a, b, ab, a^2b, aba, bab}
        
        {a, b, ab, a^2b, b^2a, aba}
        
        {a, b, b^3, ab, a^2b, aba}
        
        {a, b, ab, a^2b, a^3b, aba}
        
        {a, b, ab, a^2b, aba, ab(a^2)}
        
        {a, b, ab, a^2b, aba, abab}
        
        {a, b, ab, a^2b, aba, a(b^2)a}
        
        {a, b, ab, a(b^3), a^2b, aba}
        
        {a, b, ab, a^2b, aba, b(a^2)b}
        
        {a, b, ab, a^2b, aba, b^2ab}
        
        {a, b, ab, a^2b, a^4b, aba}
        
        {a, b, ab, a^2b, aba, ab(a^3)}
        
        {a, b, ab, a^2b, aba, ab(a^2)b}
        
        {a, b, ab, a^2b, aba, ababa}
        
        {a, b, ab, a^2b, aba, aba(b^2)}
        
        {a, b, ab, a^2b, aba, a(b^2)ab}
        
        {a, b, ab, a^2b, aba, b(a^3)b}
        
        {a, b, ab, a^2b, aba, b^2(a^2)b}
        
        {a, b, ab, a^2b, aba, ab(a^3)b}
        
        {a, b, ab, a^2b, aba, ababab}
        
        {a, b, ab, a^2b, aba, a(b^2)(a^2)b}
        
        {a, b, ab, a^2b, aba, ab(a^4)b}
        
        {a, b, ab, a^2b, aba, abab(a^2)b}
      - {a, b, ab, a(b^2), a^2b} (24 descendants)
        
        {a, b, ab, a(b^2), b(a^2), a^2b}
        
        {a, b, ab, a(b^2), a^2b, bab}
        
        {a, b, ab, a(b^2), a^2b, b^2a}
        
        {a, b, b^3, ab, a(b^2), a^2b}
        
        {a, b, ab, a(b^2), a^2b, a^3b}
        
        {a, b, ab, a(b^2), a^2b, ab(a^2)}
        
        {a, b, ab, a(b^2), a^2b, abab}
        
        {a, b, ab, a(b^2), a^2b, a(b^2)a}
        
        {a, b, ab, a(b^2), a(b^3), a^2b}
        
        {a, b, ab, a(b^2), a^2b, b(a^2)b}
        
        {a, b, ab, a(b^2), a^2b, b^2ab}
        
        {a, b, ab, a(b^2), a^2b, a^4b}
        
        {a, b, ab, a(b^2), a^2b, ab(a^2)b}
        
        {a, b, ab, a(b^2), a^2b, a(b^2)(a^2)}
        
        {a, b, ab, a(b^2), a^2b, a(b^2)ab}
        
        {a, b, ab, a(b^2), a^2b, a(b^3)a}
        
        {a, b, ab, a(b^2), a(b^4), a^2b}
        
        {a, b, ab, a(b^2), a^2b, b(a^3)b}
        
        {a, b, ab, a(b^2), a^2b, b^2(a^2)b}
        
        {a, b, ab, a(b^2), a^2b, ab(a^3)b}
        
        {a, b, ab, a(b^2), a^2b, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), a^2b, a(b^3)ab}
        
        {a, b, ab, a(b^2), a^2b, a(b^2)(a^3)b}
        
        {a, b, ab, a(b^2), a^2b, a(b^3)(a^2)b}
      - {a, b, ab, b(a^2), a^2b} (18 descendants)
        
        {a, b, ab, b(a^2), a^2b, bab}
        
        {a, b, ab, b(a^2), a^2b, b^2a}
        
        {a, b, b^3, ab, b(a^2), a^2b}
        
        {a, b, ab, b(a^2), a^2b, a^3b}
        
        {a, b, ab, b(a^2), a^2b, ab(a^2)}
        
        {a, b, ab, b(a^2), a^2b, abab}
        
        {a, b, ab, b(a^2), a^2b, a(b^2)a}
        
        {a, b, ab, a(b^3), b(a^2), a^2b}
        
        {a, b, ab, b(a^2), a^2b, b(a^2)b}
        
        {a, b, ab, b(a^2), a^2b, b^2ab}
        
        {a, b, ab, b(a^2), a^2b, a^4b}
        
        {a, b, ab, b(a^2), a^2b, a^2b(a^2)}
        
        {a, b, ab, b(a^2), a^2b, ab(a^2)b}
        
        {a, b, ab, b(a^2), a^2b, a(b^2)ab}
        
        {a, b, ab, b(a^2), a^2b, b(a^3)b}
        
        {a, b, ab, b(a^2), a^2b, b^2(a^2)b}
        
        {a, b, ab, b(a^2), a^2b, ab(a^3)b}
        
        {a, b, ab, b(a^2), a^2b, a(b^2)(a^2)b}
      - {a, b, ab, a^2b, bab} (21 descendants)
        
        {a, b, ab, a^2b, b^2a, bab}
        
        {a, b, b^3, ab, a^2b, bab}
        
        {a, b, ab, a^2b, a^3b, bab}
        
        {a, b, ab, a^2b, ab(a^2), bab}
        
        {a, b, ab, a^2b, bab, abab}
        
        {a, b, ab, a^2b, a(b^2)a, bab}
        
        {a, b, ab, a(b^3), a^2b, bab}
        
        {a, b, ab, a^2b, bab, b(a^2)b}
        
        {a, b, ab, a^2b, bab, b^2ab}
        
        {a, b, ab, a^2b, a^4b, bab}
        
        {a, b, ab, a^2b, bab, a^2bab}
        
        {a, b, ab, a^2b, bab, ab(a^2)b}
        
        {a, b, ab, a^2b, bab, a(b^2)ab}
        
        {a, b, ab, a^2b, bab, b(a^3)b}
        
        {a, b, ab, a^2b, bab, babab}
        
        {a, b, ab, a^2b, bab, b^2(a^2)b}
        
        {a, b, ab, a^2b, bab, b^3ab}
        
        {a, b, ab, a^2b, bab, ab(a^3)b}
        
        {a, b, ab, a^2b, bab, ababab}
        
        {a, b, ab, a^2b, bab, a(b^2)(a^2)b}
        
        {a, b, ab, a^2b, bab, a(b^3)ab}
      - {a, b, ab, a^2b, b^2a} (16 descendants)
        
        {a, b, b^3, ab, a^2b, b^2a}
        
        {a, b, ab, a^2b, a^3b, b^2a}
        
        {a, b, ab, a^2b, b^2a, ab(a^2)}
        
        {a, b, ab, a^2b, b^2a, abab}
        
        {a, b, ab, a^2b, b^2a, a(b^2)a}
        
        {a, b, ab, a(b^3), a^2b, b^2a}
        
        {a, b, ab, a^2b, b^2a, b(a^2)b}
        
        {a, b, ab, a^2b, b^2a, b^2ab}
        
        {a, b, ab, a^2b, a^4b, b^2a}
        
        {a, b, ab, a^2b, b^2a, a^2(b^2)a}
        
        {a, b, ab, a^2b, b^2a, ab(a^2)b}
        
        {a, b, ab, a^2b, b^2a, a(b^2)ab}
        
        {a, b, ab, a^2b, b^2a, b(a^3)b}
        
        {a, b, ab, a^2b, b^2a, b^2(a^2)b}
        
        {a, b, ab, a^2b, b^2a, ab(a^3)b}
        
        {a, b, ab, a^2b, b^2a, a(b^2)(a^2)b}
      - {a, b, b^3, ab, a^2b} (16 descendants)
        
        {a, b, b^3, ab, a^2b, a^3b}
        
        {a, b, b^3, ab, a^2b, ab(a^2)}
        
        {a, b, b^3, ab, a^2b, abab}
        
        {a, b, b^3, ab, a^2b, a(b^2)a}
        
        {a, b, b^3, ab, a(b^3), a^2b}
        
        {a, b, b^3, ab, a^2b, b(a^2)b}
        
        {a, b, b^3, ab, a^2b, b^2ab}
        
        {a, b, b^3, ab, a^2b, a^4b}
        
        {a, b, b^3, ab, a^2b, a^2(b^3)}
        
        {a, b, b^3, ab, a^2b, ab(a^2)b}
        
        {a, b, b^3, ab, a^2b, a(b^2)ab}
        
        {a, b, b^3, ab, a^2b, b(a^3)b}
        
        {a, b, b^3, ab, a^2b, b^2(a^2)b}
        
        {a, b, b^3, b^5, ab, a^2b}
        
        {a, b, b^3, ab, a^2b, ab(a^3)b}
        
        {a, b, b^3, ab, a^2b, a(b^2)(a^2)b}
      - {a, b, ab, a^2b, a^3b} (18 descendants)
        
        {a, b, ab, a^2b, a^3b, ab(a^2)}
        
        {a, b, ab, a^2b, a^3b, abab}
        
        {a, b, ab, a^2b, a^3b, a(b^2)a}
        
        {a, b, ab, a(b^3), a^2b, a^3b}
        
        {a, b, ab, a^2b, a^3b, b(a^2)b}
        
        {a, b, ab, a^2b, a^3b, b^2ab}
        
        {a, b, ab, a^2b, a^3b, a^4b}
        
        {a, b, ab, a^2b, a^3b, ab(a^2)b}
        
        {a, b, ab, a^2b, a^3b, a(b^2)ab}
        
        {a, b, ab, a^2b, a^3b, b(a^3)b}
        
        {a, b, ab, a^2b, a^3b, b^2(a^2)b}
        
        {a, b, ab, a^2b, a^3b, a^5b}
        
        {a, b, ab, a^2b, a^3b, ab(a^3)b}
        
        {a, b, ab, a^2b, a^3b, a(b^2)(a^2)b}
        
        {a, b, ab, a^2b, a^3b, b(a^4)b}
        
        {a, b, ab, a^2b, a^3b, b^2(a^3)b}
        
        {a, b, ab, a^2b, a^3b, ab(a^4)b}
        
        {a, b, ab, a^2b, a^3b, a(b^2)(a^3)b}
      - {a, b, ab, a^2b, ab(a^2)} (12 descendants)
        
        {a, b, ab, a^2b, ab(a^2), abab}
        
        {a, b, ab, a^2b, ab(a^2), a(b^2)a}
        
        {a, b, ab, a(b^3), a^2b, ab(a^2)}
        
        {a, b, ab, a^2b, ab(a^2), b(a^2)b}
        
        {a, b, ab, a^2b, ab(a^2), b^2ab}
        
        {a, b, ab, a^2b, a^4b, ab(a^2)}
        
        {a, b, ab, a^2b, ab(a^2), ab(a^2)b}
        
        {a, b, ab, a^2b, ab(a^2), a(b^2)ab}
        
        {a, b, ab, a^2b, ab(a^2), b(a^3)b}
        
        {a, b, ab, a^2b, ab(a^2), b^2(a^2)b}
        
        {a, b, ab, a^2b, ab(a^2), ab(a^3)b}
        
        {a, b, ab, a^2b, ab(a^2), a(b^2)(a^2)b}
      - {a, b, ab, a^2b, abab} (11 descendants)
        
        {a, b, ab, a^2b, a(b^2)a, abab}
        
        {a, b, ab, a(b^3), a^2b, abab}
        
        {a, b, ab, a^2b, b(a^2)b, abab}
        
        {a, b, ab, a^2b, b^2ab, abab}
        
        {a, b, ab, a^2b, a^4b, abab}
        
        {a, b, ab, a^2b, abab, ab(a^2)b}
        
        {a, b, ab, a^2b, abab, a(b^2)ab}
        
        {a, b, ab, a^2b, b(a^3)b, abab}
        
        {a, b, ab, a^2b, b^2(a^2)b, abab}
        
        {a, b, ab, a^2b, abab, ab(a^3)b}
        
        {a, b, ab, a^2b, abab, a(b^2)(a^2)b}
      - {a, b, ab, a^2b, a(b^2)a} (10 descendants)
        
        {a, b, ab, a(b^3), a^2b, a(b^2)a}
        
        {a, b, ab, a^2b, a(b^2)a, b(a^2)b}
        
        {a, b, ab, a^2b, a(b^2)a, b^2ab}
        
        {a, b, ab, a^2b, a^4b, a(b^2)a}
        
        {a, b, ab, a^2b, a(b^2)a, ab(a^2)b}
        
        {a, b, ab, a^2b, a(b^2)a, a(b^2)ab}
        
        {a, b, ab, a^2b, a(b^2)a, b(a^3)b}
        
        {a, b, ab, a^2b, a(b^2)a, b^2(a^2)b}
        
        {a, b, ab, a^2b, a(b^2)a, ab(a^3)b}
        
        {a, b, ab, a^2b, a(b^2)a, a(b^2)(a^2)b}
      - {a, b, ab, a(b^3), a^2b} (9 descendants)
        
        {a, b, ab, a(b^3), a^2b, b(a^2)b}
        
        {a, b, ab, a(b^3), a^2b, b^2ab}
        
        {a, b, ab, a(b^3), a^2b, a^4b}
        
        {a, b, ab, a(b^3), a^2b, ab(a^2)b}
        
        {a, b, ab, a(b^3), a^2b, a(b^2)ab}
        
        {a, b, ab, a(b^3), a^2b, b(a^3)b}
        
        {a, b, ab, a(b^3), a^2b, b^2(a^2)b}
        
        {a, b, ab, a(b^3), a^2b, ab(a^3)b}
        
        {a, b, ab, a(b^3), a^2b, a(b^2)(a^2)b}
      - {a, b, ab, a^2b, b(a^2)b} (13 descendants)
        
        {a, b, ab, a^2b, b(a^2)b, b^2ab}
        
        {a, b, ab, a^2b, a^4b, b(a^2)b}
        
        {a, b, ab, a^2b, b(a^2)b, ab(a^2)b}
        
        {a, b, ab, a^2b, b(a^2)b, a(b^2)ab}
        
        {a, b, ab, a^2b, b(a^2)b, b(a^3)b}
        
        {a, b, ab, a^2b, b(a^2)b, b^2(a^2)b}
        
        {a, b, ab, a^2b, b(a^2)b, a^2b(a^2)b}
        
        {a, b, ab, a^2b, b(a^2)b, ab(a^3)b}
        
        {a, b, ab, a^2b, b(a^2)b, a(b^2)(a^2)b}
        
        {a, b, ab, a^2b, b(a^2)b, bab(a^2)b}
        
        {a, b, ab, a^2b, b(a^2)b, b^3(a^2)b}
        
        {a, b, ab, a^2b, b(a^2)b, abab(a^2)b}
        
        {a, b, ab, a^2b, b(a^2)b, a(b^3)(a^2)b}
      - {a, b, ab, a^2b, b^2ab} (8 descendants)
        
        {a, b, ab, a^2b, a^4b, b^2ab}
        
        {a, b, ab, a^2b, b^2ab, ab(a^2)b}
        
        {a, b, ab, a^2b, b^2ab, a(b^2)ab}
        
        {a, b, ab, a^2b, b(a^3)b, b^2ab}
        
        {a, b, ab, a^2b, b^2ab, b^2(a^2)b}
        
        {a, b, ab, a^2b, b^2ab, a^2(b^2)ab}
        
        {a, b, ab, a^2b, b^2ab, ab(a^3)b}
        
        {a, b, ab, a^2b, b^2ab, a(b^2)(a^2)b}
      - {a, b, ab, a^2b, a^4b} (6 descendants)
        
        {a, b, ab, a^2b, a^4b, ab(a^2)b}
        
        {a, b, ab, a^2b, a^4b, a(b^2)ab}
        
        {a, b, ab, a^2b, a^4b, b(a^3)b}
        
        {a, b, ab, a^2b, a^4b, b^2(a^2)b}
        
        {a, b, ab, a^2b, a^4b, ab(a^3)b}
        
        {a, b, ab, a^2b, a^4b, a(b^2)(a^2)b}
      - {a, b, ab, a^2b, ab(a^2)b} (5 descendants)
        
        {a, b, ab, a^2b, ab(a^2)b, a(b^2)ab}
        
        {a, b, ab, a^2b, b(a^3)b, ab(a^2)b}
        
        {a, b, ab, a^2b, b^2(a^2)b, ab(a^2)b}
        
        {a, b, ab, a^2b, ab(a^2)b, ab(a^3)b}
        
        {a, b, ab, a^2b, ab(a^2)b, a(b^2)(a^2)b}
      - {a, b, ab, a^2b, a(b^2)ab} (4 descendants)
        
        {a, b, ab, a^2b, b(a^3)b, a(b^2)ab}
        
        {a, b, ab, a^2b, b^2(a^2)b, a(b^2)ab}
        
        {a, b, ab, a^2b, ab(a^3)b, a(b^2)ab}
        
        {a, b, ab, a^2b, a(b^2)ab, a(b^2)(a^2)b}
      - {a, b, ab, a^2b, b(a^3)b} (4 descendants)
        
        {a, b, ab, a^2b, b(a^3)b, b^2(a^2)b}
        
        {a, b, ab, a^2b, b(a^3)b, ab(a^3)b}
        
        {a, b, ab, a^2b, b(a^3)b, a(b^2)(a^2)b}
        
        {a, b, ab, a^2b, b(a^3)b, a^2b(a^3)b}
      - {a, b, ab, a^2b, b^2(a^2)b} (3 descendants)
        
        {a, b, ab, a^2b, b^2(a^2)b, ab(a^3)b}
        
        {a, b, ab, a^2b, b^2(a^2)b, a(b^2)(a^2)b}
        
        {a, b, ab, a^2b, b^2(a^2)b, a^2(b^2)(a^2)b}
      - {a, b, ab, a^2b, ab(a^3)b} (1 descendant)
        
        {a, b, ab, a^2b, ab(a^3)b, a(b^2)(a^2)b}
      - {a, b, ab, a^2b, a(b^2)(a^2)b} (0 descendants)
    - {a, b, ab, aba} (19 descendants)
      - {a, b, ab, a(b^2), aba} (23 descendants)
        
        {a, b, ab, a(b^2), b(a^2), aba}
        
        {a, b, ab, a(b^2), aba, bab}
        
        {a, b, ab, a(b^2), b^2a, aba}
        
        {a, b, b^3, ab, a(b^2), aba}
        
        {a, b, ab, a(b^2), a^3b, aba}
        
        {a, b, ab, a(b^2), aba, ab(a^2)}
        
        {a, b, ab, a(b^2), aba, abab}
        
        {a, b, ab, a(b^2), aba, a(b^2)a}
        
        {a, b, ab, a(b^2), a(b^3), aba}
        
        {a, b, ab, a(b^2), aba, b(a^2)b}
        
        {a, b, ab, a(b^2), aba, b^2ab}
        
        {a, b, ab, a(b^2), aba, ab(a^3)}
        
        {a, b, ab, a(b^2), aba, ab(a^2)b}
        
        {a, b, ab, a(b^2), aba, ababa}
        
        {a, b, ab, a(b^2), aba, aba(b^2)}
        
        {a, b, ab, a(b^2), aba, a(b^2)(a^2)}
        
        {a, b, ab, a(b^2), aba, a(b^2)ab}
        
        {a, b, ab, a(b^2), aba, a(b^3)a}
        
        {a, b, ab, a(b^2), a(b^4), aba}
        
        {a, b, ab, a(b^2), aba, ab(a^3)b}
        
        {a, b, ab, a(b^2), aba, ababab}
        
        {a, b, ab, a(b^2), aba, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), aba, a(b^3)ab}
      - {a, b, ab, b(a^2), aba} (18 descendants)
        
        {a, b, ab, b(a^2), aba, bab}
        
        {a, b, ab, b(a^2), b^2a, aba}
        
        {a, b, b^3, ab, b(a^2), aba}
        
        {a, b, ab, b(a^2), a^3b, aba}
        
        {a, b, ab, b(a^2), aba, ab(a^2)}
        
        {a, b, ab, b(a^2), aba, abab}
        
        {a, b, ab, b(a^2), aba, a(b^2)a}
        
        {a, b, ab, a(b^3), b(a^2), aba}
        
        {a, b, ab, b(a^2), aba, b(a^2)b}
        
        {a, b, ab, b(a^2), aba, b^2ab}
        
        {a, b, ab, b(a^2), aba, ab(a^3)}
        
        {a, b, ab, b(a^2), aba, ab(a^2)b}
        
        {a, b, ab, b(a^2), aba, ababa}
        
        {a, b, ab, b(a^2), aba, aba(b^2)}
        
        {a, b, ab, b(a^2), aba, a(b^2)ab}
        
        {a, b, ab, b(a^2), aba, b(a^2)ba}
        
        {a, b, ab, b(a^2), aba, ab(a^3)b}
        
        {a, b, ab, b(a^2), aba, ababab}
      - {a, b, ab, aba, bab} (22 descendants)
        
        {a, b, ab, b^2a, aba, bab}
        
        {a, b, b^3, ab, aba, bab}
        
        {a, b, ab, a^3b, aba, bab}
        
        {a, b, ab, aba, ab(a^2), bab}
        
        {a, b, ab, aba, bab, abab}
        
        {a, b, ab, aba, a(b^2)a, bab}
        
        {a, b, ab, a(b^3), aba, bab}
        
        {a, b, ab, aba, bab, b(a^2)b}
        
        {a, b, ab, aba, bab, b^2ab}
        
        {a, b, ab, aba, bab, a^2bab}
        
        {a, b, ab, aba, ab(a^3), bab}
        
        {a, b, ab, aba, bab, ab(a^2)b}
        
        {a, b, ab, aba, bab, ababa}
        
        {a, b, ab, aba, bab, aba(b^2)}
        
        {a, b, ab, aba, bab, a(b^2)ab}
        
        {a, b, ab, aba, bab, babab}
        
        {a, b, ab, aba, bab, b^3ab}
        
        {a, b, ab, aba, bab, ab(a^3)b}
        
        {a, b, ab, aba, bab, ababab}
        
        {a, b, ab, aba, bab, a(b^3)ab}
        
        {a, b, ab, aba, bab, ab(a^2)bab}
        
        {a, b, ab, aba, bab, aba(b^2)ab}
      - {a, b, ab, b^2a, aba} (16 descendants)
        
        {a, b, b^3, ab, b^2a, aba}
        
        {a, b, ab, a^3b, b^2a, aba}
        
        {a, b, ab, b^2a, aba, ab(a^2)}
        
        {a, b, ab, b^2a, aba, abab}
        
        {a, b, ab, b^2a, aba, a(b^2)a}
        
        {a, b, ab, a(b^3), b^2a, aba}
        
        {a, b, ab, b^2a, aba, b(a^2)b}
        
        {a, b, ab, b^2a, aba, b^2ab}
        
        {a, b, ab, b^2a, aba, ab(a^3)}
        
        {a, b, ab, b^2a, aba, ab(a^2)b}
        
        {a, b, ab, b^2a, aba, ababa}
        
        {a, b, ab, b^2a, aba, aba(b^2)}
        
        {a, b, ab, b^2a, aba, a(b^2)ab}
        
        {a, b, ab, b^2a, aba, b^2aba}
        
        {a, b, ab, b^2a, aba, ab(a^3)b}
        
        {a, b, ab, b^2a, aba, ababab}
      - {a, b, b^3, ab, aba} (15 descendants)
        
        {a, b, b^3, ab, a^3b, aba}
        
        {a, b, b^3, ab, aba, ab(a^2)}
        
        {a, b, b^3, ab, aba, abab}
        
        {a, b, b^3, ab, aba, a(b^2)a}
        
        {a, b, b^3, ab, a(b^3), aba}
        
        {a, b, b^3, ab, aba, b(a^2)b}
        
        {a, b, b^3, ab, aba, b^2ab}
        
        {a, b, b^3, ab, aba, ab(a^3)}
        
        {a, b, b^3, ab, aba, ab(a^2)b}
        
        {a, b, b^3, ab, aba, ababa}
        
        {a, b, b^3, ab, aba, aba(b^2)}
        
        {a, b, b^3, ab, aba, a(b^2)ab}
        
        {a, b, b^3, b^5, ab, aba}
        
        {a, b, b^3, ab, aba, ab(a^3)b}
        
        {a, b, b^3, ab, aba, ababab}
      - {a, b, ab, a^3b, aba} (13 descendants)
        
        {a, b, ab, a^3b, aba, ab(a^2)}
        
        {a, b, ab, a^3b, aba, abab}
        
        {a, b, ab, a^3b, aba, a(b^2)a}
        
        {a, b, ab, a(b^3), a^3b, aba}
        
        {a, b, ab, a^3b, aba, b(a^2)b}
        
        {a, b, ab, a^3b, aba, b^2ab}
        
        {a, b, ab, a^3b, aba, ab(a^3)}
        
        {a, b, ab, a^3b, aba, ab(a^2)b}
        
        {a, b, ab, a^3b, aba, ababa}
        
        {a, b, ab, a^3b, aba, aba(b^2)}
        
        {a, b, ab, a^3b, aba, a(b^2)ab}
        
        {a, b, ab, a^3b, aba, ab(a^3)b}
        
        {a, b, ab, a^3b, aba, ababab}
      - {a, b, ab, aba, ab(a^2)} (17 descendants)
        
        {a, b, ab, aba, ab(a^2), abab}
        
        {a, b, ab, aba, ab(a^2), a(b^2)a}
        
        {a, b, ab, a(b^3), aba, ab(a^2)}
        
        {a, b, ab, aba, ab(a^2), b(a^2)b}
        
        {a, b, ab, aba, ab(a^2), b^2ab}
        
        {a, b, ab, aba, ab(a^2), ab(a^3)}
        
        {a, b, ab, aba, ab(a^2), ab(a^2)b}
        
        {a, b, ab, aba, ab(a^2), ababa}
        
        {a, b, ab, aba, ab(a^2), aba(b^2)}
        
        {a, b, ab, aba, ab(a^2), a(b^2)ab}
        
        {a, b, ab, aba, ab(a^2), ab(a^4)}
        
        {a, b, ab, aba, ab(a^2), ab(a^3)b}
        
        {a, b, ab, aba, ab(a^2), ab(a^2)ba}
        
        {a, b, ab, aba, ab(a^2), ab(a^2)(b^2)}
        
        {a, b, ab, aba, ab(a^2), ababab}
        
        {a, b, ab, aba, ab(a^2), ab(a^4)b}
        
        {a, b, ab, aba, ab(a^2), ab(a^2)bab}
      - {a, b, ab, aba, abab} (16 descendants)
        
        {a, b, ab, aba, a(b^2)a, abab}
        
        {a, b, ab, a(b^3), aba, abab}
        
        {a, b, ab, aba, b(a^2)b, abab}
        
        {a, b, ab, aba, b^2ab, abab}
        
        {a, b, ab, aba, ab(a^3), abab}
        
        {a, b, ab, aba, abab, ab(a^2)b}
        
        {a, b, ab, aba, abab, ababa}
        
        {a, b, ab, aba, abab, aba(b^2)}
        
        {a, b, ab, aba, abab, a(b^2)ab}
        
        {a, b, ab, aba, abab, ab(a^3)b}
        
        {a, b, ab, aba, abab, abab(a^2)}
        
        {a, b, ab, aba, abab, ababab}
        
        {a, b, ab, aba, abab, aba(b^2)a}
        
        {a, b, ab, aba, abab, aba(b^3)}
        
        {a, b, ab, aba, abab, abab(a^2)b}
        
        {a, b, ab, aba, abab, aba(b^2)ab}
      - {a, b, ab, aba, a(b^2)a} (11 descendants)
        
        {a, b, ab, a(b^3), aba, a(b^2)a}
        
        {a, b, ab, aba, a(b^2)a, b(a^2)b}
        
        {a, b, ab, aba, a(b^2)a, b^2ab}
        
        {a, b, ab, aba, ab(a^3), a(b^2)a}
        
        {a, b, ab, aba, a(b^2)a, ab(a^2)b}
        
        {a, b, ab, aba, a(b^2)a, ababa}
        
        {a, b, ab, aba, a(b^2)a, aba(b^2)}
        
        {a, b, ab, aba, a(b^2)a, a(b^2)ab}
        
        {a, b, ab, aba, a(b^2)a, ab(a^3)b}
        
        {a, b, ab, aba, a(b^2)a, ababab}
        
        {a, b, ab, aba, a(b^2)a, a(b^2)aba}
      - {a, b, ab, a(b^3), aba} (9 descendants)
        
        {a, b, ab, a(b^3), aba, b(a^2)b}
        
        {a, b, ab, a(b^3), aba, b^2ab}
        
        {a, b, ab, a(b^3), aba, ab(a^3)}
        
        {a, b, ab, a(b^3), aba, ab(a^2)b}
        
        {a, b, ab, a(b^3), aba, ababa}
        
        {a, b, ab, a(b^3), aba, aba(b^2)}
        
        {a, b, ab, a(b^3), aba, a(b^2)ab}
        
        {a, b, ab, a(b^3), aba, ab(a^3)b}
        
        {a, b, ab, a(b^3), aba, ababab}
      - {a, b, ab, aba, b(a^2)b} (8 descendants)
        
        {a, b, ab, aba, b(a^2)b, b^2ab}
        
        {a, b, ab, aba, ab(a^3), b(a^2)b}
        
        {a, b, ab, aba, b(a^2)b, ab(a^2)b}
        
        {a, b, ab, aba, b(a^2)b, ababa}
        
        {a, b, ab, aba, b(a^2)b, aba(b^2)}
        
        {a, b, ab, aba, b(a^2)b, a(b^2)ab}
        
        {a, b, ab, aba, b(a^2)b, ab(a^3)b}
        
        {a, b, ab, aba, b(a^2)b, ababab}
      - {a, b, ab, aba, b^2ab} (7 descendants)
        
        {a, b, ab, aba, ab(a^3), b^2ab}
        
        {a, b, ab, aba, b^2ab, ab(a^2)b}
        
        {a, b, ab, aba, b^2ab, ababa}
        
        {a, b, ab, aba, b^2ab, aba(b^2)}
        
        {a, b, ab, aba, b^2ab, a(b^2)ab}
        
        {a, b, ab, aba, b^2ab, ab(a^3)b}
        
        {a, b, ab, aba, b^2ab, ababab}
      - {a, b, ab, aba, ab(a^3)} (7 descendants)
        
        {a, b, ab, aba, ab(a^3), ab(a^2)b}
        
        {a, b, ab, aba, ab(a^3), ababa}
        
        {a, b, ab, aba, ab(a^3), aba(b^2)}
        
        {a, b, ab, aba, ab(a^3), a(b^2)ab}
        
        {a, b, ab, aba, ab(a^3), ab(a^3)b}
        
        {a, b, ab, aba, ab(a^3), ababab}
        
        {a, b, ab, aba, ab(a^3), ab(a^3)ba}
      - {a, b, ab, aba, ab(a^2)b} (5 descendants)
        
        {a, b, ab, aba, ab(a^2)b, ababa}
        
        {a, b, ab, aba, aba(b^2), ab(a^2)b}
        
        {a, b, ab, aba, ab(a^2)b, a(b^2)ab}
        
        {a, b, ab, aba, ab(a^2)b, ab(a^3)b}
        
        {a, b, ab, aba, ab(a^2)b, ababab}
      - {a, b, ab, aba, ababa} (5 descendants)
        
        {a, b, ab, aba, aba(b^2), ababa}
        
        {a, b, ab, aba, a(b^2)ab, ababa}
        
        {a, b, ab, aba, ab(a^3)b, ababa}
        
        {a, b, ab, aba, ababa, ababab}
        
        {a, b, ab, aba, ababa, abababa}
      - {a, b, ab, aba, aba(b^2)} (3 descendants)
        
        {a, b, ab, aba, aba(b^2), a(b^2)ab}
        
        {a, b, ab, aba, aba(b^2), ab(a^3)b}
        
        {a, b, ab, aba, aba(b^2), ababab}
      - {a, b, ab, aba, a(b^2)ab} (2 descendants)
        
        {a, b, ab, aba, ab(a^3)b, a(b^2)ab}
        
        {a, b, ab, aba, a(b^2)ab, ababab}
      - {a, b, ab, aba, ab(a^3)b} (1 descendant)
        
        {a, b, ab, aba, ab(a^3)b, ababab}
      - {a, b, ab, aba, ababab} (0 descendants)
    - {a, b, ab, a(b^2)} (18 descendants)
      - {a, b, ab, a(b^2), b(a^2)} (18 descendants)
        
        {a, b, ab, a(b^2), b(a^2), bab}
        
        {a, b, ab, a(b^2), b(a^2), b^2a}
        
        {a, b, b^3, ab, a(b^2), b(a^2)}
        
        {a, b, ab, a(b^2), b(a^2), a^3b}
        
        {a, b, ab, a(b^2), b(a^2), ab(a^2)}
        
        {a, b, ab, a(b^2), b(a^2), abab}
        
        {a, b, ab, a(b^2), b(a^2), a(b^2)a}
        
        {a, b, ab, a(b^2), a(b^3), b(a^2)}
        
        {a, b, ab, a(b^2), b(a^2), b(a^2)b}
        
        {a, b, ab, a(b^2), b(a^2), b^2ab}
        
        {a, b, ab, a(b^2), b(a^2), ab(a^2)b}
        
        {a, b, ab, a(b^2), b(a^2), a(b^2)(a^2)}
        
        {a, b, ab, a(b^2), b(a^2), a(b^2)ab}
        
        {a, b, ab, a(b^2), b(a^2), a(b^3)a}
        
        {a, b, ab, a(b^2), a(b^4), b(a^2)}
        
        {a, b, ab, a(b^2), b(a^2), b(a^2)(b^2)}
        
        {a, b, ab, a(b^2), b(a^2), a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), b(a^2), a(b^3)ab}
      - {a, b, ab, a(b^2), bab} (22 descendants)
        
        {a, b, ab, a(b^2), b^2a, bab}
        
        {a, b, b^3, ab, a(b^2), bab}
        
        {a, b, ab, a(b^2), a^3b, bab}
        
        {a, b, ab, a(b^2), ab(a^2), bab}
        
        {a, b, ab, a(b^2), bab, abab}
        
        {a, b, ab, a(b^2), a(b^2)a, bab}
        
        {a, b, ab, a(b^2), a(b^3), bab}
        
        {a, b, ab, a(b^2), bab, b(a^2)b}
        
        {a, b, ab, a(b^2), bab, b^2ab}
        
        {a, b, ab, a(b^2), bab, a^2bab}
        
        {a, b, ab, a(b^2), bab, ab(a^2)b}
        
        {a, b, ab, a(b^2), a(b^2)(a^2), bab}
        
        {a, b, ab, a(b^2), bab, a(b^2)ab}
        
        {a, b, ab, a(b^2), a(b^3)a, bab}
        
        {a, b, ab, a(b^2), a(b^4), bab}
        
        {a, b, ab, a(b^2), bab, babab}
        
        {a, b, ab, a(b^2), bab, b^3ab}
        
        {a, b, ab, a(b^2), bab, ababab}
        
        {a, b, ab, a(b^2), bab, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), bab, a(b^3)ab}
        
        {a, b, ab, a(b^2), bab, a(b^2)abab}
        
        {a, b, ab, a(b^2), bab, a(b^4)ab}
      - {a, b, ab, a(b^2), b^2a} (16 descendants)
        
        {a, b, b^3, ab, a(b^2), b^2a}
        
        {a, b, ab, a(b^2), a^3b, b^2a}
        
        {a, b, ab, a(b^2), b^2a, ab(a^2)}
        
        {a, b, ab, a(b^2), b^2a, abab}
        
        {a, b, ab, a(b^2), b^2a, a(b^2)a}
        
        {a, b, ab, a(b^2), a(b^3), b^2a}
        
        {a, b, ab, a(b^2), b^2a, b(a^2)b}
        
        {a, b, ab, a(b^2), b^2a, b^2ab}
        
        {a, b, ab, a(b^2), b^2a, ab(a^2)b}
        
        {a, b, ab, a(b^2), b^2a, a(b^2)(a^2)}
        
        {a, b, ab, a(b^2), b^2a, a(b^2)ab}
        
        {a, b, ab, a(b^2), b^2a, a(b^3)a}
        
        {a, b, ab, a(b^2), a(b^4), b^2a}
        
        {a, b, ab, a(b^2), b^2a, b^2a(b^2)}
        
        {a, b, ab, a(b^2), b^2a, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), b^2a, a(b^3)ab}
      - {a, b, b^3, ab, a(b^2)} (15 descendants)
        
        {a, b, b^3, ab, a(b^2), a^3b}
        
        {a, b, b^3, ab, a(b^2), ab(a^2)}
        
        {a, b, b^3, ab, a(b^2), abab}
        
        {a, b, b^3, ab, a(b^2), a(b^2)a}
        
        {a, b, b^3, ab, a(b^2), a(b^3)}
        
        {a, b, b^3, ab, a(b^2), b(a^2)b}
        
        {a, b, b^3, ab, a(b^2), b^2ab}
        
        {a, b, b^3, ab, a(b^2), ab(a^2)b}
        
        {a, b, b^3, ab, a(b^2), a(b^2)(a^2)}
        
        {a, b, b^3, ab, a(b^2), a(b^2)ab}
        
        {a, b, b^3, ab, a(b^2), a(b^3)a}
        
        {a, b, b^3, ab, a(b^2), a(b^4)}
        
        {a, b, b^3, b^5, ab, a(b^2)}
        
        {a, b, b^3, ab, a(b^2), a(b^2)(a^2)b}
        
        {a, b, b^3, ab, a(b^2), a(b^3)ab}
      - {a, b, ab, a(b^2), a^3b} (13 descendants)
        
        {a, b, ab, a(b^2), a^3b, ab(a^2)}
        
        {a, b, ab, a(b^2), a^3b, abab}
        
        {a, b, ab, a(b^2), a^3b, a(b^2)a}
        
        {a, b, ab, a(b^2), a(b^3), a^3b}
        
        {a, b, ab, a(b^2), a^3b, b(a^2)b}
        
        {a, b, ab, a(b^2), a^3b, b^2ab}
        
        {a, b, ab, a(b^2), a^3b, ab(a^2)b}
        
        {a, b, ab, a(b^2), a^3b, a(b^2)(a^2)}
        
        {a, b, ab, a(b^2), a^3b, a(b^2)ab}
        
        {a, b, ab, a(b^2), a^3b, a(b^3)a}
        
        {a, b, ab, a(b^2), a(b^4), a^3b}
        
        {a, b, ab, a(b^2), a^3b, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), a^3b, a(b^3)ab}
      - {a, b, ab, a(b^2), ab(a^2)} (13 descendants)
        
        {a, b, ab, a(b^2), ab(a^2), abab}
        
        {a, b, ab, a(b^2), ab(a^2), a(b^2)a}
        
        {a, b, ab, a(b^2), a(b^3), ab(a^2)}
        
        {a, b, ab, a(b^2), ab(a^2), b(a^2)b}
        
        {a, b, ab, a(b^2), ab(a^2), b^2ab}
        
        {a, b, ab, a(b^2), ab(a^2), ab(a^2)b}
        
        {a, b, ab, a(b^2), ab(a^2), a(b^2)(a^2)}
        
        {a, b, ab, a(b^2), ab(a^2), a(b^2)ab}
        
        {a, b, ab, a(b^2), ab(a^2), a(b^3)a}
        
        {a, b, ab, a(b^2), a(b^4), ab(a^2)}
        
        {a, b, ab, a(b^2), ab(a^2), ab(a^2)(b^2)}
        
        {a, b, ab, a(b^2), ab(a^2), a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), ab(a^2), a(b^3)ab}
      - {a, b, ab, a(b^2), abab} (11 descendants)
        
        {a, b, ab, a(b^2), a(b^2)a, abab}
        
        {a, b, ab, a(b^2), a(b^3), abab}
        
        {a, b, ab, a(b^2), b(a^2)b, abab}
        
        {a, b, ab, a(b^2), b^2ab, abab}
        
        {a, b, ab, a(b^2), abab, ab(a^2)b}
        
        {a, b, ab, a(b^2), a(b^2)(a^2), abab}
        
        {a, b, ab, a(b^2), abab, a(b^2)ab}
        
        {a, b, ab, a(b^2), a(b^3)a, abab}
        
        {a, b, ab, a(b^2), a(b^4), abab}
        
        {a, b, ab, a(b^2), abab, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), abab, a(b^3)ab}
      - {a, b, ab, a(b^2), a(b^2)a} (15 descendants)
        
        {a, b, ab, a(b^2), a(b^3), a(b^2)a}
        
        {a, b, ab, a(b^2), a(b^2)a, b(a^2)b}
        
        {a, b, ab, a(b^2), a(b^2)a, b^2ab}
        
        {a, b, ab, a(b^2), a(b^2)a, ab(a^2)b}
        
        {a, b, ab, a(b^2), a(b^2)a, a(b^2)(a^2)}
        
        {a, b, ab, a(b^2), a(b^2)a, a(b^2)ab}
        
        {a, b, ab, a(b^2), a(b^2)a, a(b^3)a}
        
        {a, b, ab, a(b^2), a(b^4), a(b^2)a}
        
        {a, b, ab, a(b^2), a(b^2)a, a(b^2)(a^3)}
        
        {a, b, ab, a(b^2), a(b^2)a, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), a(b^2)a, a(b^2)aba}
        
        {a, b, ab, a(b^2), a(b^2)a, a(b^2)a(b^2)}
        
        {a, b, ab, a(b^2), a(b^2)a, a(b^3)ab}
        
        {a, b, ab, a(b^2), a(b^2)a, a(b^2)(a^3)b}
        
        {a, b, ab, a(b^2), a(b^2)a, a(b^2)abab}
      - {a, b, ab, a(b^2), a(b^3)} (14 descendants)
        
        {a, b, ab, a(b^2), a(b^3), b(a^2)b}
        
        {a, b, ab, a(b^2), a(b^3), b^2ab}
        
        {a, b, ab, a(b^2), a(b^3), ab(a^2)b}
        
        {a, b, ab, a(b^2), a(b^3), a(b^2)(a^2)}
        
        {a, b, ab, a(b^2), a(b^3), a(b^2)ab}
        
        {a, b, ab, a(b^2), a(b^3), a(b^3)a}
        
        {a, b, ab, a(b^2), a(b^3), a(b^4)}
        
        {a, b, ab, a(b^2), a(b^3), a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), a(b^3), a(b^3)(a^2)}
        
        {a, b, ab, a(b^2), a(b^3), a(b^3)ab}
        
        {a, b, ab, a(b^2), a(b^3), a(b^4)a}
        
        {a, b, ab, a(b^2), a(b^3), a(b^5)}
        
        {a, b, ab, a(b^2), a(b^3), a(b^3)(a^2)b}
        
        {a, b, ab, a(b^2), a(b^3), a(b^4)ab}
      - {a, b, ab, a(b^2), b(a^2)b} (8 descendants)
        
        {a, b, ab, a(b^2), b(a^2)b, b^2ab}
        
        {a, b, ab, a(b^2), b(a^2)b, ab(a^2)b}
        
        {a, b, ab, a(b^2), a(b^2)(a^2), b(a^2)b}
        
        {a, b, ab, a(b^2), b(a^2)b, a(b^2)ab}
        
        {a, b, ab, a(b^2), a(b^3)a, b(a^2)b}
        
        {a, b, ab, a(b^2), a(b^4), b(a^2)b}
        
        {a, b, ab, a(b^2), b(a^2)b, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), b(a^2)b, a(b^3)ab}
      - {a, b, ab, a(b^2), b^2ab} (7 descendants)
        
        {a, b, ab, a(b^2), b^2ab, ab(a^2)b}
        
        {a, b, ab, a(b^2), a(b^2)(a^2), b^2ab}
        
        {a, b, ab, a(b^2), b^2ab, a(b^2)ab}
        
        {a, b, ab, a(b^2), a(b^3)a, b^2ab}
        
        {a, b, ab, a(b^2), a(b^4), b^2ab}
        
        {a, b, ab, a(b^2), b^2ab, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), b^2ab, a(b^3)ab}
      - {a, b, ab, a(b^2), ab(a^2)b} (6 descendants)
        
        {a, b, ab, a(b^2), a(b^2)(a^2), ab(a^2)b}
        
        {a, b, ab, a(b^2), ab(a^2)b, a(b^2)ab}
        
        {a, b, ab, a(b^2), a(b^3)a, ab(a^2)b}
        
        {a, b, ab, a(b^2), a(b^4), ab(a^2)b}
        
        {a, b, ab, a(b^2), ab(a^2)b, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), ab(a^2)b, a(b^3)ab}
      - {a, b, ab, a(b^2), a(b^2)(a^2)} (6 descendants)
        
        {a, b, ab, a(b^2), a(b^2)(a^2), a(b^2)ab}
        
        {a, b, ab, a(b^2), a(b^2)(a^2), a(b^3)a}
        
        {a, b, ab, a(b^2), a(b^4), a(b^2)(a^2)}
        
        {a, b, ab, a(b^2), a(b^2)(a^2), a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), a(b^2)(a^2), a(b^3)ab}
        
        {a, b, ab, a(b^2), a(b^2)(a^2), a(b^2)(a^2)(b^2)}
      - {a, b, ab, a(b^2), a(b^2)ab} (4 descendants)
        
        {a, b, ab, a(b^2), a(b^3)a, a(b^2)ab}
        
        {a, b, ab, a(b^2), a(b^4), a(b^2)ab}
        
        {a, b, ab, a(b^2), a(b^2)ab, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), a(b^2)ab, a(b^3)ab}
      - {a, b, ab, a(b^2), a(b^3)a} (4 descendants)
        
        {a, b, ab, a(b^2), a(b^4), a(b^3)a}
        
        {a, b, ab, a(b^2), a(b^3)a, a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), a(b^3)a, a(b^3)ab}
        
        {a, b, ab, a(b^2), a(b^3)a, a(b^3)a(b^2)}
      - {a, b, ab, a(b^2), a(b^4)} (2 descendants)
        
        {a, b, ab, a(b^2), a(b^4), a(b^2)(a^2)b}
        
        {a, b, ab, a(b^2), a(b^4), a(b^3)ab}
      - {a, b, ab, a(b^2), a(b^2)(a^2)b} (1 descendant)
        
        {a, b, ab, a(b^2), a(b^2)(a^2)b, a(b^3)ab}
      - {a, b, ab, a(b^2), a(b^3)ab} (0 descendants)
    - {a, b, ab, b(a^2)} (12 descendants)
      - {a, b, ab, b(a^2), bab} (17 descendants)
        
        {a, b, ab, b(a^2), b^2a, bab}
        
        {a, b, b^3, ab, b(a^2), bab}
        
        {a, b, ab, b(a^2), a^3b, bab}
        
        {a, b, ab, b(a^2), ab(a^2), bab}
        
        {a, b, ab, b(a^2), bab, abab}
        
        {a, b, ab, b(a^2), a(b^2)a, bab}
        
        {a, b, ab, a(b^3), b(a^2), bab}
        
        {a, b, ab, b(a^2), bab, b(a^2)b}
        
        {a, b, ab, b(a^2), bab, b^2ab}
        
        {a, b, ab, b(a^2), bab, a^2bab}
        
        {a, b, ab, b(a^2), bab, ab(a^2)b}
        
        {a, b, ab, b(a^2), bab, a(b^2)ab}
        
        {a, b, ab, b(a^2), bab, bab(a^2)}
        
        {a, b, ab, b(a^2), bab, babab}
        
        {a, b, ab, b(a^2), bab, b^3ab}
        
        {a, b, ab, b(a^2), bab, ababab}
        
        {a, b, ab, b(a^2), bab, a(b^3)ab}
      - {a, b, ab, b(a^2), b^2a} (10 descendants)
        
        {a, b, b^3, ab, b(a^2), b^2a}
        
        {a, b, ab, b(a^2), a^3b, b^2a}
        
        {a, b, ab, b(a^2), b^2a, ab(a^2)}
        
        {a, b, ab, b(a^2), b^2a, abab}
        
        {a, b, ab, b(a^2), b^2a, a(b^2)a}
        
        {a, b, ab, a(b^3), b(a^2), b^2a}
        
        {a, b, ab, b(a^2), b^2a, b(a^2)b}
        
        {a, b, ab, b(a^2), b^2a, b^2ab}
        
        {a, b, ab, b(a^2), b^2a, ab(a^2)b}
        
        {a, b, ab, b(a^2), b^2a, a(b^2)ab}
      - {a, b, b^3, ab, b(a^2)} (11 descendants)
        
        {a, b, b^3, ab, b(a^2), a^3b}
        
        {a, b, b^3, ab, b(a^2), ab(a^2)}
        
        {a, b, b^3, ab, b(a^2), abab}
        
        {a, b, b^3, ab, b(a^2), a(b^2)a}
        
        {a, b, b^3, ab, a(b^3), b(a^2)}
        
        {a, b, b^3, ab, b(a^2), b(a^2)b}
        
        {a, b, b^3, ab, b(a^2), b^2ab}
        
        {a, b, b^3, ab, b(a^2), ab(a^2)b}
        
        {a, b, b^3, ab, b(a^2), a(b^2)ab}
        
        {a, b, b^3, ab, b(a^2), b^3(a^2)}
        
        {a, b, b^3, b^5, ab, b(a^2)}
      - {a, b, ab, b(a^2), a^3b} (9 descendants)
        
        {a, b, ab, b(a^2), a^3b, ab(a^2)}
        
        {a, b, ab, b(a^2), a^3b, abab}
        
        {a, b, ab, b(a^2), a^3b, a(b^2)a}
        
        {a, b, ab, a(b^3), b(a^2), a^3b}
        
        {a, b, ab, b(a^2), a^3b, b(a^2)b}
        
        {a, b, ab, b(a^2), a^3b, b^2ab}
        
        {a, b, ab, b(a^2), a^3b, ab(a^2)b}
        
        {a, b, ab, b(a^2), a^3b, a(b^2)ab}
        
        {a, b, ab, b(a^2), a^3b, b(a^4)b}
      - {a, b, ab, b(a^2), ab(a^2)} (7 descendants)
        
        {a, b, ab, b(a^2), ab(a^2), abab}
        
        {a, b, ab, b(a^2), ab(a^2), a(b^2)a}
        
        {a, b, ab, a(b^3), b(a^2), ab(a^2)}
        
        {a, b, ab, b(a^2), ab(a^2), b(a^2)b}
        
        {a, b, ab, b(a^2), ab(a^2), b^2ab}
        
        {a, b, ab, b(a^2), ab(a^2), ab(a^2)b}
        
        {a, b, ab, b(a^2), ab(a^2), a(b^2)ab}
      - {a, b, ab, b(a^2), abab} (8 descendants)
        
        {a, b, ab, b(a^2), a(b^2)a, abab}
        
        {a, b, ab, a(b^3), b(a^2), abab}
        
        {a, b, ab, b(a^2), b(a^2)b, abab}
        
        {a, b, ab, b(a^2), b^2ab, abab}
        
        {a, b, ab, b(a^2), abab, ab(a^2)b}
        
        {a, b, ab, b(a^2), abab, a(b^2)ab}
        
        {a, b, ab, b(a^2), abab, abab(a^2)}
        
        {a, b, ab, b(a^2), abab, b(a^2)bab}
      - {a, b, ab, b(a^2), a(b^2)a} (5 descendants)
        
        {a, b, ab, a(b^3), b(a^2), a(b^2)a}
        
        {a, b, ab, b(a^2), a(b^2)a, b(a^2)b}
        
        {a, b, ab, b(a^2), a(b^2)a, b^2ab}
        
        {a, b, ab, b(a^2), a(b^2)a, ab(a^2)b}
        
        {a, b, ab, b(a^2), a(b^2)a, a(b^2)ab}
      - {a, b, ab, a(b^3), b(a^2)} (5 descendants)
        
        {a, b, ab, a(b^3), b(a^2), b(a^2)b}
        
        {a, b, ab, a(b^3), b(a^2), b^2ab}
        
        {a, b, ab, a(b^3), b(a^2), ab(a^2)b}
        
        {a, b, ab, a(b^3), b(a^2), a(b^2)ab}
        
        {a, b, ab, a(b^3), b(a^2), a(b^3)(a^2)}
      - {a, b, ab, b(a^2), b(a^2)b} (3 descendants)
        
        {a, b, ab, b(a^2), b(a^2)b, b^2ab}
        
        {a, b, ab, b(a^2), b(a^2)b, ab(a^2)b}
        
        {a, b, ab, b(a^2), b(a^2)b, a(b^2)ab}
      - {a, b, ab, b(a^2), b^2ab} (2 descendants)
        
        {a, b, ab, b(a^2), b^2ab, ab(a^2)b}
        
        {a, b, ab, b(a^2), b^2ab, a(b^2)ab}
      - {a, b, ab, b(a^2), ab(a^2)b} (1 descendant)
        
        {a, b, ab, b(a^2), ab(a^2)b, a(b^2)ab}
      - {a, b, ab, b(a^2), a(b^2)ab} (0 descendants)
    - {a, b, ab, bab} (16 descendants)
      - {a, b, ab, b^2a, bab} (16 descendants)
        
        {a, b, b^3, ab, b^2a, bab}
        
        {a, b, ab, a^3b, b^2a, bab}
        
        {a, b, ab, b^2a, ab(a^2), bab}
        
        {a, b, ab, b^2a, bab, abab}
        
        {a, b, ab, b^2a, a(b^2)a, bab}
        
        {a, b, ab, a(b^3), b^2a, bab}
        
        {a, b, ab, b^2a, bab, b(a^2)b}
        
        {a, b, ab, b^2a, bab, b^2ab}
        
        {a, b, ab, b^2a, bab, a^2bab}
        
        {a, b, ab, b^2a, bab, ab(a^2)b}
        
        {a, b, ab, b^2a, bab, a(b^2)ab}
        
        {a, b, ab, b^2a, bab, babab}
        
        {a, b, ab, b^2a, bab, ba(b^2)a}
        
        {a, b, ab, b^2a, bab, b^3ab}
        
        {a, b, ab, b^2a, bab, ababab}
        
        {a, b, ab, b^2a, bab, a(b^3)ab}
      - {a, b, b^3, ab, bab} (16 descendants)
        
        {a, b, b^3, ab, a^3b, bab}
        
        {a, b, b^3, ab, ab(a^2), bab}
        
        {a, b, b^3, ab, bab, abab}
        
        {a, b, b^3, ab, a(b^2)a, bab}
        
        {a, b, b^3, ab, a(b^3), bab}
        
        {a, b, b^3, ab, bab, b(a^2)b}
        
        {a, b, b^3, ab, bab, b^2ab}
        
        {a, b, b^3, ab, bab, a^2bab}
        
        {a, b, b^3, ab, bab, ab(a^2)b}
        
        {a, b, b^3, ab, bab, a(b^2)ab}
        
        {a, b, b^3, ab, bab, babab}
        
        {a, b, b^3, ab, bab, ba(b^3)}
        
        {a, b, b^3, ab, bab, b^3ab}
        
        {a, b, b^3, b^5, ab, bab}
        
        {a, b, b^3, ab, bab, ababab}
        
        {a, b, b^3, ab, bab, a(b^3)ab}
      - {a, b, ab, a^3b, bab} (13 descendants)
        
        {a, b, ab, a^3b, ab(a^2), bab}
        
        {a, b, ab, a^3b, bab, abab}
        
        {a, b, ab, a^3b, a(b^2)a, bab}
        
        {a, b, ab, a(b^3), a^3b, bab}
        
        {a, b, ab, a^3b, bab, b(a^2)b}
        
        {a, b, ab, a^3b, bab, b^2ab}
        
        {a, b, ab, a^3b, bab, a^2bab}
        
        {a, b, ab, a^3b, bab, ab(a^2)b}
        
        {a, b, ab, a^3b, bab, a(b^2)ab}
        
        {a, b, ab, a^3b, bab, babab}
        
        {a, b, ab, a^3b, bab, b^3ab}
        
        {a, b, ab, a^3b, bab, ababab}
        
        {a, b, ab, a^3b, bab, a(b^3)ab}
      - {a, b, ab, ab(a^2), bab} (12 descendants)
        
        {a, b, ab, ab(a^2), bab, abab}
        
        {a, b, ab, ab(a^2), a(b^2)a, bab}
        
        {a, b, ab, a(b^3), ab(a^2), bab}
        
        {a, b, ab, ab(a^2), bab, b(a^2)b}
        
        {a, b, ab, ab(a^2), bab, b^2ab}
        
        {a, b, ab, ab(a^2), bab, a^2bab}
        
        {a, b, ab, ab(a^2), bab, ab(a^2)b}
        
        {a, b, ab, ab(a^2), bab, a(b^2)ab}
        
        {a, b, ab, ab(a^2), bab, babab}
        
        {a, b, ab, ab(a^2), bab, b^3ab}
        
        {a, b, ab, ab(a^2), bab, ababab}
        
        {a, b, ab, ab(a^2), bab, a(b^3)ab}
      - {a, b, ab, bab, abab} (16 descendants)
        
        {a, b, ab, a(b^2)a, bab, abab}
        
        {a, b, ab, a(b^3), bab, abab}
        
        {a, b, ab, bab, b(a^2)b, abab}
        
        {a, b, ab, bab, b^2ab, abab}
        
        {a, b, ab, bab, abab, a^2bab}
        
        {a, b, ab, bab, abab, ab(a^2)b}
        
        {a, b, ab, bab, abab, a(b^2)ab}
        
        {a, b, ab, bab, abab, babab}
        
        {a, b, ab, bab, b^3ab, abab}
        
        {a, b, ab, bab, abab, a^3bab}
        
        {a, b, ab, bab, abab, ababab}
        
        {a, b, ab, bab, abab, a(b^3)ab}
        
        {a, b, ab, bab, abab, b(a^2)bab}
        
        {a, b, ab, bab, abab, b^2abab}
        
        {a, b, ab, bab, abab, ab(a^2)bab}
        
        {a, b, ab, bab, abab, a(b^2)abab}
      - {a, b, ab, a(b^2)a, bab} (10 descendants)
        
        {a, b, ab, a(b^3), a(b^2)a, bab}
        
        {a, b, ab, a(b^2)a, bab, b(a^2)b}
        
        {a, b, ab, a(b^2)a, bab, b^2ab}
        
        {a, b, ab, a(b^2)a, bab, a^2bab}
        
        {a, b, ab, a(b^2)a, bab, ab(a^2)b}
        
        {a, b, ab, a(b^2)a, bab, a(b^2)ab}
        
        {a, b, ab, a(b^2)a, bab, babab}
        
        {a, b, ab, a(b^2)a, bab, b^3ab}
        
        {a, b, ab, a(b^2)a, bab, ababab}
        
        {a, b, ab, a(b^2)a, bab, a(b^3)ab}
      - {a, b, ab, a(b^3), bab} (9 descendants)
        
        {a, b, ab, a(b^3), bab, b(a^2)b}
        
        {a, b, ab, a(b^3), bab, b^2ab}
        
        {a, b, ab, a(b^3), bab, a^2bab}
        
        {a, b, ab, a(b^3), bab, ab(a^2)b}
        
        {a, b, ab, a(b^3), bab, a(b^2)ab}
        
        {a, b, ab, a(b^3), bab, babab}
        
        {a, b, ab, a(b^3), bab, b^3ab}
        
        {a, b, ab, a(b^3), bab, ababab}
        
        {a, b, ab, a(b^3), bab, a(b^3)ab}
      - {a, b, ab, bab, b(a^2)b} (9 descendants)
        
        {a, b, ab, bab, b(a^2)b, b^2ab}
        
        {a, b, ab, bab, b(a^2)b, a^2bab}
        
        {a, b, ab, bab, b(a^2)b, ab(a^2)b}
        
        {a, b, ab, bab, b(a^2)b, a(b^2)ab}
        
        {a, b, ab, bab, b(a^2)b, babab}
        
        {a, b, ab, bab, b(a^2)b, b^3ab}
        
        {a, b, ab, bab, b(a^2)b, ababab}
        
        {a, b, ab, bab, b(a^2)b, a(b^3)ab}
        
        {a, b, ab, bab, b(a^2)b, bab(a^2)b}
      - {a, b, ab, bab, b^2ab} (12 descendants)
        
        {a, b, ab, bab, b^2ab, a^2bab}
        
        {a, b, ab, bab, b^2ab, ab(a^2)b}
        
        {a, b, ab, bab, b^2ab, a(b^2)ab}
        
        {a, b, ab, bab, b^2ab, babab}
        
        {a, b, ab, bab, b^2ab, b^3ab}
        
        {a, b, ab, bab, b^2ab, a^2(b^2)ab}
        
        {a, b, ab, bab, b^2ab, ababab}
        
        {a, b, ab, bab, b^2ab, a(b^3)ab}
        
        {a, b, ab, bab, b^2ab, ba(b^2)ab}
        
        {a, b, ab, bab, b^2ab, b^4ab}
        
        {a, b, ab, bab, b^2ab, aba(b^2)ab}
        
        {a, b, ab, bab, b^2ab, a(b^4)ab}
      - {a, b, ab, bab, a^2bab} (6 descendants)
        
        {a, b, ab, bab, ab(a^2)b, a^2bab}
        
        {a, b, ab, bab, a(b^2)ab, a^2bab}
        
        {a, b, ab, bab, a^2bab, babab}
        
        {a, b, ab, bab, b^3ab, a^2bab}
        
        {a, b, ab, bab, a^2bab, ababab}
        
        {a, b, ab, bab, a(b^3)ab, a^2bab}
      - {a, b, ab, bab, ab(a^2)b} (5 descendants)
        
        {a, b, ab, bab, ab(a^2)b, a(b^2)ab}
        
        {a, b, ab, bab, ab(a^2)b, babab}
        
        {a, b, ab, bab, b^3ab, ab(a^2)b}
        
        {a, b, ab, bab, ab(a^2)b, ababab}
        
        {a, b, ab, bab, ab(a^2)b, a(b^3)ab}
      - {a, b, ab, bab, a(b^2)ab} (4 descendants)
        
        {a, b, ab, bab, a(b^2)ab, babab}
        
        {a, b, ab, bab, b^3ab, a(b^2)ab}
        
        {a, b, ab, bab, a(b^2)ab, ababab}
        
        {a, b, ab, bab, a(b^2)ab, a(b^3)ab}
      - {a, b, ab, bab, babab} (4 descendants)
        
        {a, b, ab, bab, b^3ab, babab}
        
        {a, b, ab, bab, babab, ababab}
        
        {a, b, ab, bab, a(b^3)ab, babab}
        
        {a, b, ab, bab, babab, bababab}
      - {a, b, ab, bab, b^3ab} (3 descendants)
        
        {a, b, ab, bab, b^3ab, ababab}
        
        {a, b, ab, bab, b^3ab, a(b^3)ab}
        
        {a, b, ab, bab, b^3ab, ba(b^3)ab}
      - {a, b, ab, bab, ababab} (1 descendant)
        
        {a, b, ab, bab, a(b^3)ab, ababab}
      - {a, b, ab, bab, a(b^3)ab} (0 descendants)
    - {a, b, ab, b^2a} (10 descendants)
      - {a, b, b^3, ab, b^2a} (11 descendants)
        
        {a, b, b^3, ab, a^3b, b^2a}
        
        {a, b, b^3, ab, b^2a, ab(a^2)}
        
        {a, b, b^3, ab, b^2a, abab}
        
        {a, b, b^3, ab, b^2a, a(b^2)a}
        
        {a, b, b^3, ab, a(b^3), b^2a}
        
        {a, b, b^3, ab, b^2a, b(a^2)b}
        
        {a, b, b^3, ab, b^2a, b^2ab}
        
        {a, b, b^3, ab, b^2a, ab(a^2)b}
        
        {a, b, b^3, ab, b^2a, a(b^2)ab}
        
        {a, b, b^3, ab, b^2a, b^4a}
        
        {a, b, b^3, b^5, ab, b^2a}
      - {a, b, ab, a^3b, b^2a} (9 descendants)
        
        {a, b, ab, a^3b, b^2a, ab(a^2)}
        
        {a, b, ab, a^3b, b^2a, abab}
        
        {a, b, ab, a^3b, b^2a, a(b^2)a}
        
        {a, b, ab, a(b^3), a^3b, b^2a}
        
        {a, b, ab, a^3b, b^2a, b(a^2)b}
        
        {a, b, ab, a^3b, b^2a, b^2ab}
        
        {a, b, ab, a^3b, b^2a, ab(a^2)b}
        
        {a, b, ab, a^3b, b^2a, a(b^2)ab}
        
        {a, b, ab, a^3b, b^2a, b^2(a^3)b}
      - {a, b, ab, b^2a, ab(a^2)} (7 descendants)
        
        {a, b, ab, b^2a, ab(a^2), abab}
        
        {a, b, ab, b^2a, ab(a^2), a(b^2)a}
        
        {a, b, ab, a(b^3), b^2a, ab(a^2)}
        
        {a, b, ab, b^2a, ab(a^2), b(a^2)b}
        
        {a, b, ab, b^2a, ab(a^2), b^2ab}
        
        {a, b, ab, b^2a, ab(a^2), ab(a^2)b}
        
        {a, b, ab, b^2a, ab(a^2), a(b^2)ab}
      - {a, b, ab, b^2a, abab} (8 descendants)
        
        {a, b, ab, b^2a, a(b^2)a, abab}
        
        {a, b, ab, a(b^3), b^2a, abab}
        
        {a, b, ab, b^2a, b(a^2)b, abab}
        
        {a, b, ab, b^2a, b^2ab, abab}
        
        {a, b, ab, b^2a, abab, ab(a^2)b}
        
        {a, b, ab, b^2a, abab, a(b^2)ab}
        
        {a, b, ab, b^2a, abab, aba(b^2)a}
        
        {a, b, ab, b^2a, abab, b^2abab}
      - {a, b, ab, b^2a, a(b^2)a} (5 descendants)
        
        {a, b, ab, a(b^3), b^2a, a(b^2)a}
        
        {a, b, ab, b^2a, a(b^2)a, b(a^2)b}
        
        {a, b, ab, b^2a, a(b^2)a, b^2ab}
        
        {a, b, ab, b^2a, a(b^2)a, ab(a^2)b}
        
        {a, b, ab, b^2a, a(b^2)a, a(b^2)ab}
      - {a, b, ab, a(b^3), b^2a} (5 descendants)
        
        {a, b, ab, a(b^3), b^2a, b(a^2)b}
        
        {a, b, ab, a(b^3), b^2a, b^2ab}
        
        {a, b, ab, a(b^3), b^2a, ab(a^2)b}
        
        {a, b, ab, a(b^3), b^2a, a(b^2)ab}
        
        {a, b, ab, a(b^3), b^2a, a(b^4)a}
      - {a, b, ab, b^2a, b(a^2)b} (3 descendants)
        
        {a, b, ab, b^2a, b(a^2)b, b^2ab}
        
        {a, b, ab, b^2a, b(a^2)b, ab(a^2)b}
        
        {a, b, ab, b^2a, b(a^2)b, a(b^2)ab}
      - {a, b, ab, b^2a, b^2ab} (2 descendants)
        
        {a, b, ab, b^2a, b^2ab, ab(a^2)b}
        
        {a, b, ab, b^2a, b^2ab, a(b^2)ab}
      - {a, b, ab, b^2a, ab(a^2)b} (1 descendant)
        
        {a, b, ab, b^2a, ab(a^2)b, a(b^2)ab}
      - {a, b, ab, b^2a, a(b^2)ab} (0 descendants)
    - {a, b, b^3, ab} (10 descendants)
      - {a, b, b^3, ab, a^3b} (9 descendants)
        
        {a, b, b^3, ab, a^3b, ab(a^2)}
        
        {a, b, b^3, ab, a^3b, abab}
        
        {a, b, b^3, ab, a^3b, a(b^2)a}
        
        {a, b, b^3, ab, a(b^3), a^3b}
        
        {a, b, b^3, ab, a^3b, b(a^2)b}
        
        {a, b, b^3, ab, a^3b, b^2ab}
        
        {a, b, b^3, ab, a^3b, ab(a^2)b}
        
        {a, b, b^3, ab, a^3b, a(b^2)ab}
        
        {a, b, b^3, b^5, ab, a^3b}
      - {a, b, b^3, ab, ab(a^2)} (8 descendants)
        
        {a, b, b^3, ab, ab(a^2), abab}
        
        {a, b, b^3, ab, ab(a^2), a(b^2)a}
        
        {a, b, b^3, ab, a(b^3), ab(a^2)}
        
        {a, b, b^3, ab, ab(a^2), b(a^2)b}
        
        {a, b, b^3, ab, ab(a^2), b^2ab}
        
        {a, b, b^3, ab, ab(a^2), ab(a^2)b}
        
        {a, b, b^3, ab, ab(a^2), a(b^2)ab}
        
        {a, b, b^3, b^5, ab, ab(a^2)}
      - {a, b, b^3, ab, abab} (8 descendants)
        
        {a, b, b^3, ab, a(b^2)a, abab}
        
        {a, b, b^3, ab, a(b^3), abab}
        
        {a, b, b^3, ab, b(a^2)b, abab}
        
        {a, b, b^3, ab, b^2ab, abab}
        
        {a, b, b^3, ab, abab, ab(a^2)b}
        
        {a, b, b^3, ab, abab, a(b^2)ab}
        
        {a, b, b^3, b^5, ab, abab}
        
        {a, b, b^3, ab, abab, aba(b^3)}
      - {a, b, b^3, ab, a(b^2)a} (6 descendants)
        
        {a, b, b^3, ab, a(b^3), a(b^2)a}
        
        {a, b, b^3, ab, a(b^2)a, b(a^2)b}
        
        {a, b, b^3, ab, a(b^2)a, b^2ab}
        
        {a, b, b^3, ab, a(b^2)a, ab(a^2)b}
        
        {a, b, b^3, ab, a(b^2)a, a(b^2)ab}
        
        {a, b, b^3, b^5, ab, a(b^2)a}
      - {a, b, b^3, ab, a(b^3)} (6 descendants)
        
        {a, b, b^3, ab, a(b^3), b(a^2)b}
        
        {a, b, b^3, ab, a(b^3), b^2ab}
        
        {a, b, b^3, ab, a(b^3), ab(a^2)b}
        
        {a, b, b^3, ab, a(b^3), a(b^2)ab}
        
        {a, b, b^3, b^5, ab, a(b^3)}
        
        {a, b, b^3, ab, a(b^3), a(b^5)}
      - {a, b, b^3, ab, b(a^2)b} (5 descendants)
        
        {a, b, b^3, ab, b(a^2)b, b^2ab}
        
        {a, b, b^3, ab, b(a^2)b, ab(a^2)b}
        
        {a, b, b^3, ab, b(a^2)b, a(b^2)ab}
        
        {a, b, b^3, b^5, ab, b(a^2)b}
        
        {a, b, b^3, ab, b(a^2)b, b^3(a^2)b}
      - {a, b, b^3, ab, b^2ab} (4 descendants)
        
        {a, b, b^3, ab, b^2ab, ab(a^2)b}
        
        {a, b, b^3, ab, b^2ab, a(b^2)ab}
        
        {a, b, b^3, b^5, ab, b^2ab}
        
        {a, b, b^3, ab, b^2ab, b^4ab}
      - {a, b, b^3, ab, ab(a^2)b} (2 descendants)
        
        {a, b, b^3, ab, ab(a^2)b, a(b^2)ab}
        
        {a, b, b^3, b^5, ab, ab(a^2)b}
      - {a, b, b^3, ab, a(b^2)ab} (1 descendant)
        
        {a, b, b^3, b^5, ab, a(b^2)ab}
      - {a, b, b^3, b^5, ab} (1 descendant)
        
        {a, b, b^3, b^5, b^7, ab}
    - {a, b, ab, a^3b} (8 descendants)
      - {a, b, ab, a^3b, ab(a^2)} (8 descendants)
        
        {a, b, ab, a^3b, ab(a^2), abab}
        
        {a, b, ab, a^3b, ab(a^2), a(b^2)a}
        
        {a, b, ab, a(b^3), a^3b, ab(a^2)}
        
        {a, b, ab, a^3b, ab(a^2), b(a^2)b}
        
        {a, b, ab, a^3b, ab(a^2), b^2ab}
        
        {a, b, ab, a^3b, ab(a^2), ab(a^2)b}
        
        {a, b, ab, a^3b, ab(a^2), a(b^2)ab}
        
        {a, b, ab, a^3b, ab(a^2), ab(a^4)b}
      - {a, b, ab, a^3b, abab} (6 descendants)
        
        {a, b, ab, a^3b, a(b^2)a, abab}
        
        {a, b, ab, a(b^3), a^3b, abab}
        
        {a, b, ab, a^3b, b(a^2)b, abab}
        
        {a, b, ab, a^3b, b^2ab, abab}
        
        {a, b, ab, a^3b, abab, ab(a^2)b}
        
        {a, b, ab, a^3b, abab, a(b^2)ab}
      - {a, b, ab, a^3b, a(b^2)a} (6 descendants)
        
        {a, b, ab, a(b^3), a^3b, a(b^2)a}
        
        {a, b, ab, a^3b, a(b^2)a, b(a^2)b}
        
        {a, b, ab, a^3b, a(b^2)a, b^2ab}
        
        {a, b, ab, a^3b, a(b^2)a, ab(a^2)b}
        
        {a, b, ab, a^3b, a(b^2)a, a(b^2)ab}
        
        {a, b, ab, a^3b, a(b^2)a, a(b^2)(a^3)b}
      - {a, b, ab, a(b^3), a^3b} (4 descendants)
        
        {a, b, ab, a(b^3), a^3b, b(a^2)b}
        
        {a, b, ab, a(b^3), a^3b, b^2ab}
        
        {a, b, ab, a(b^3), a^3b, ab(a^2)b}
        
        {a, b, ab, a(b^3), a^3b, a(b^2)ab}
      - {a, b, ab, a^3b, b(a^2)b} (3 descendants)
        
        {a, b, ab, a^3b, b(a^2)b, b^2ab}
        
        {a, b, ab, a^3b, b(a^2)b, ab(a^2)b}
        
        {a, b, ab, a^3b, b(a^2)b, a(b^2)ab}
      - {a, b, ab, a^3b, b^2ab} (2 descendants)
        
        {a, b, ab, a^3b, b^2ab, ab(a^2)b}
        
        {a, b, ab, a^3b, b^2ab, a(b^2)ab}
      - {a, b, ab, a^3b, ab(a^2)b} (1 descendant)
        
        {a, b, ab, a^3b, ab(a^2)b, a(b^2)ab}
      - {a, b, ab, a^3b, a(b^2)ab} (0 descendants)
    - {a, b, ab, ab(a^2)} (7 descendants)
      - {a, b, ab, ab(a^2), abab} (7 descendants)
        
        {a, b, ab, ab(a^2), a(b^2)a, abab}
        
        {a, b, ab, a(b^3), ab(a^2), abab}
        
        {a, b, ab, ab(a^2), b(a^2)b, abab}
        
        {a, b, ab, ab(a^2), b^2ab, abab}
        
        {a, b, ab, ab(a^2), abab, ab(a^2)b}
        
        {a, b, ab, ab(a^2), abab, a(b^2)ab}
        
        {a, b, ab, ab(a^2), abab, ab(a^2)bab}
      - {a, b, ab, ab(a^2), a(b^2)a} (5 descendants)
        
        {a, b, ab, a(b^3), ab(a^2), a(b^2)a}
        
        {a, b, ab, ab(a^2), a(b^2)a, b(a^2)b}
        
        {a, b, ab, ab(a^2), a(b^2)a, b^2ab}
        
        {a, b, ab, ab(a^2), a(b^2)a, ab(a^2)b}
        
        {a, b, ab, ab(a^2), a(b^2)a, a(b^2)ab}
      - {a, b, ab, a(b^3), ab(a^2)} (4 descendants)
        
        {a, b, ab, a(b^3), ab(a^2), b(a^2)b}
        
        {a, b, ab, a(b^3), ab(a^2), b^2ab}
        
        {a, b, ab, a(b^3), ab(a^2), ab(a^2)b}
        
        {a, b, ab, a(b^3), ab(a^2), a(b^2)ab}
      - {a, b, ab, ab(a^2), b(a^2)b} (3 descendants)
        
        {a, b, ab, ab(a^2), b(a^2)b, b^2ab}
        
        {a, b, ab, ab(a^2), b(a^2)b, ab(a^2)b}
        
        {a, b, ab, ab(a^2), b(a^2)b, a(b^2)ab}
      - {a, b, ab, ab(a^2), b^2ab} (2 descendants)
        
        {a, b, ab, ab(a^2), b^2ab, ab(a^2)b}
        
        {a, b, ab, ab(a^2), b^2ab, a(b^2)ab}
      - {a, b, ab, ab(a^2), ab(a^2)b} (3 descendants)
        
        {a, b, ab, ab(a^2), ab(a^2)b, a(b^2)ab}
        
        {a, b, ab, ab(a^2), ab(a^2)b, ab(a^2)b(a^2)}
        
        {a, b, ab, ab(a^2), ab(a^2)b, ab(a^2)b(a^2)b}
      - {a, b, ab, ab(a^2), a(b^2)ab} (0 descendants)
    - {a, b, ab, abab} (6 descendants)
      - {a, b, ab, a(b^2)a, abab} (6 descendants)
        
        {a, b, ab, a(b^3), a(b^2)a, abab}
        
        {a, b, ab, a(b^2)a, b(a^2)b, abab}
        
        {a, b, ab, a(b^2)a, b^2ab, abab}
        
        {a, b, ab, a(b^2)a, abab, ab(a^2)b}
        
        {a, b, ab, a(b^2)a, abab, a(b^2)ab}
        
        {a, b, ab, a(b^2)a, abab, a(b^2)abab}
      - {a, b, ab, a(b^3), abab} (4 descendants)
        
        {a, b, ab, a(b^3), b(a^2)b, abab}
        
        {a, b, ab, a(b^3), b^2ab, abab}
        
        {a, b, ab, a(b^3), abab, ab(a^2)b}
        
        {a, b, ab, a(b^3), abab, a(b^2)ab}
      - {a, b, ab, b(a^2)b, abab} (4 descendants)
        
        {a, b, ab, b(a^2)b, b^2ab, abab}
        
        {a, b, ab, b(a^2)b, abab, ab(a^2)b}
        
        {a, b, ab, b(a^2)b, abab, a(b^2)ab}
        
        {a, b, ab, b(a^2)b, abab, abab(a^2)b}
      - {a, b, ab, b^2ab, abab} (3 descendants)
        
        {a, b, ab, b^2ab, abab, ab(a^2)b}
        
        {a, b, ab, b^2ab, abab, a(b^2)ab}
        
        {a, b, ab, b^2ab, abab, aba(b^2)ab}
      - {a, b, ab, abab, ab(a^2)b} (1 descendant)
        
        {a, b, ab, abab, ab(a^2)b, a(b^2)ab}
      - {a, b, ab, abab, a(b^2)ab} (0 descendants)
    - {a, b, ab, a(b^2)a} (5 descendants)
      - {a, b, ab, a(b^3), a(b^2)a} (4 descendants)
        
        {a, b, ab, a(b^3), a(b^2)a, b(a^2)b}
        
        {a, b, ab, a(b^3), a(b^2)a, b^2ab}
        
        {a, b, ab, a(b^3), a(b^2)a, ab(a^2)b}
        
        {a, b, ab, a(b^3), a(b^2)a, a(b^2)ab}
      - {a, b, ab, a(b^2)a, b(a^2)b} (3 descendants)
        
        {a, b, ab, a(b^2)a, b(a^2)b, b^2ab}
        
        {a, b, ab, a(b^2)a, b(a^2)b, ab(a^2)b}
        
        {a, b, ab, a(b^2)a, b(a^2)b, a(b^2)ab}
      - {a, b, ab, a(b^2)a, b^2ab} (2 descendants)
        
        {a, b, ab, a(b^2)a, b^2ab, ab(a^2)b}
        
        {a, b, ab, a(b^2)a, b^2ab, a(b^2)ab}
      - {a, b, ab, a(b^2)a, ab(a^2)b} (1 descendant)
        
        {a, b, ab, a(b^2)a, ab(a^2)b, a(b^2)ab}
      - {a, b, ab, a(b^2)a, a(b^2)ab} (2 descendants)
        
        {a, b, ab, a(b^2)a, a(b^2)ab, a(b^2)a(b^2)a}
        
        {a, b, ab, a(b^2)a, a(b^2)ab, a(b^2)a(b^2)ab}
    - {a, b, ab, a(b^3)} (4 descendants)
      - {a, b, ab, a(b^3), b(a^2)b} (4 descendants)
        
        {a, b, ab, a(b^3), b(a^2)b, b^2ab}
        
        {a, b, ab, a(b^3), b(a^2)b, ab(a^2)b}
        
        {a, b, ab, a(b^3), b(a^2)b, a(b^2)ab}
        
        {a, b, ab, a(b^3), b(a^2)b, a(b^3)(a^2)b}
      - {a, b, ab, a(b^3), b^2ab} (3 descendants)
        
        {a, b, ab, a(b^3), b^2ab, ab(a^2)b}
        
        {a, b, ab, a(b^3), b^2ab, a(b^2)ab}
        
        {a, b, ab, a(b^3), b^2ab, a(b^4)ab}
      - {a, b, ab, a(b^3), ab(a^2)b} (1 descendant)
        
        {a, b, ab, a(b^3), ab(a^2)b, a(b^2)ab}
      - {a, b, ab, a(b^3), a(b^2)ab} (0 descendants)
    - {a, b, ab, b(a^2)b} (3 descendants)
      - {a, b, ab, b(a^2)b, b^2ab} (2 descendants)
        
        {a, b, ab, b(a^2)b, b^2ab, ab(a^2)b}
        
        {a, b, ab, b(a^2)b, b^2ab, a(b^2)ab}
      - {a, b, ab, b(a^2)b, ab(a^2)b} (3 descendants)
        
        {a, b, ab, b(a^2)b, ab(a^2)b, a(b^2)ab}
        
        {a, b, ab, b(a^2)b, ab(a^2)b, b(a^2)b(a^2)b}
        
        {a, b, ab, b(a^2)b, ab(a^2)b, ab(a^2)b(a^2)b}
      - {a, b, ab, b(a^2)b, a(b^2)ab} (0 descendants)
    - {a, b, ab, b^2ab} (2 descendants)
      - {a, b, ab, b^2ab, ab(a^2)b} (1 descendant)
        
        {a, b, ab, b^2ab, ab(a^2)b, a(b^2)ab}
      - {a, b, ab, b^2ab, a(b^2)ab} (2 descendants)
        
        {a, b, ab, b^2ab, a(b^2)ab, b^2a(b^2)ab}
        
        {a, b, ab, b^2ab, a(b^2)ab, a(b^2)a(b^2)ab}
    - {a, b, ab, ab(a^2)b} (1 descendant)
      - {a, b, ab, ab(a^2)b, a(b^2)ab} (0 descendants)
    - {a, b, ab, a(b^2)ab} (0 descendants)
  - {a, b, ba} (18 descendants)
    - {a, b, b^2, ba} (28 descendants)
      - {a, b, a^3, b^2, ba} (28 descendants)
        
        {a, b, a^3, b^2, ba, a^2b}
        
        {a, b, a^3, b^2, ba, aba}
        
        {a, b, a^3, b^2, a(b^2), ba}
        
        {a, b, a^3, b^2, ba, b(a^2)}
        
        {a, b, a^3, b^2, ba, bab}
        
        {a, b, a^3, b^2, ba, b^2a}
        
        {a, b, a^3, b^2, b^3, ba}
        
        {a, b, a^3, b^2, ba, a^2ba}
        
        {a, b, a^3, b^2, ba, a^2(b^2)}
        
        {a, b, a^3, b^2, ba, a(b^2)a}
        
        {a, b, a^3, b^2, a(b^3), ba}
        
        {a, b, a^3, b^2, ba, b(a^3)}
        
        {a, b, a^3, b^2, ba, b(a^2)b}
        
        {a, b, a^3, b^2, ba, baba}
        
        {a, b, a^3, b^2, ba, ba(b^2)}
        
        {a, b, a^3, b^2, ba, b^2(a^2)}
        
        {a, b, a^3, b^2, ba, b^2ab}
        
        {a, b, a^3, b^2, ba, b^3a}
        
        {a, b, a^3, b^2, b^4, ba}
        
        {a, b, a^3, a^5, b^2, ba}
        
        {a, b, a^3, b^2, ba, b(a^2)ba}
        
        {a, b, a^3, b^2, ba, b(a^2)(b^2)}
        
        {a, b, a^3, b^2, ba, ba(b^2)a}
        
        {a, b, a^3, b^2, ba, ba(b^3)}
        
        {a, b, a^3, b^2, ba, b^2aba}
        
        {a, b, a^3, b^2, ba, b^2a(b^2)}
        
        {a, b, a^3, b^2, ba, b^4a}
        
        {a, b, a^3, b^2, b^5, ba}
      - {a, b, b^2, ba, a^2b} (26 descendants)
        
        {a, b, b^2, ba, a^2b, aba}
        
        {a, b, b^2, a(b^2), ba, a^2b}
        
        {a, b, b^2, ba, b(a^2), a^2b}
        
        {a, b, b^2, ba, a^2b, bab}
        
        {a, b, b^2, ba, a^2b, b^2a}
        
        {a, b, b^2, b^3, ba, a^2b}
        
        {a, b, b^2, ba, a^2b, a^2ba}
        
        {a, b, b^2, ba, a^2b, a^2(b^2)}
        
        {a, b, b^2, ba, a^2b, a(b^2)a}
        
        {a, b, b^2, a(b^3), ba, a^2b}
        
        {a, b, b^2, ba, b(a^3), a^2b}
        
        {a, b, b^2, ba, a^2b, b(a^2)b}
        
        {a, b, b^2, ba, a^2b, baba}
        
        {a, b, b^2, ba, a^2b, ba(b^2)}
        
        {a, b, b^2, ba, a^2b, b^2(a^2)}
        
        {a, b, b^2, ba, a^2b, b^2ab}
        
        {a, b, b^2, ba, a^2b, b^3a}
        
        {a, b, b^2, b^4, ba, a^2b}
        
        {a, b, b^2, ba, a^2b, b(a^2)ba}
        
        {a, b, b^2, ba, a^2b, b(a^2)(b^2)}
        
        {a, b, b^2, ba, a^2b, ba(b^2)a}
        
        {a, b, b^2, ba, a^2b, ba(b^3)}
        
        {a, b, b^2, ba, a^2b, b^2aba}
        
        {a, b, b^2, ba, a^2b, b^2a(b^2)}
        
        {a, b, b^2, ba, a^2b, b^4a}
        
        {a, b, b^2, b^5, ba, a^2b}
      - {a, b, b^2, ba, aba} (31 descendants)
        
        {a, b, b^2, a(b^2), ba, aba}
        
        {a, b, b^2, ba, b(a^2), aba}
        
        {a, b, b^2, ba, aba, bab}
        
        {a, b, b^2, ba, b^2a, aba}
        
        {a, b, b^2, b^3, ba, aba}
        
        {a, b, b^2, ba, aba, a^2ba}
        
        {a, b, b^2, ba, a^2(b^2), aba}
        
        {a, b, b^2, ba, aba, a(b^2)a}
        
        {a, b, b^2, a(b^3), ba, aba}
        
        {a, b, b^2, ba, b(a^3), aba}
        
        {a, b, b^2, ba, aba, b(a^2)b}
        
        {a, b, b^2, ba, aba, baba}
        
        {a, b, b^2, ba, aba, ba(b^2)}
        
        {a, b, b^2, ba, b^2(a^2), aba}
        
        {a, b, b^2, ba, aba, b^2ab}
        
        {a, b, b^2, ba, b^3a, aba}
        
        {a, b, b^2, b^4, ba, aba}
        
        {a, b, b^2, ba, aba, a^3ba}
        
        {a, b, b^2, ba, aba, ababa}
        
        {a, b, b^2, ba, aba, b(a^2)ba}
        
        {a, b, b^2, ba, aba, b(a^2)(b^2)}
        
        {a, b, b^2, ba, aba, ba(b^2)a}
        
        {a, b, b^2, ba, aba, ba(b^3)}
        
        {a, b, b^2, ba, aba, b^2aba}
        
        {a, b, b^2, ba, aba, b^2a(b^2)}
        
        {a, b, b^2, ba, b^4a, aba}
        
        {a, b, b^2, b^5, ba, aba}
        
        {a, b, b^2, ba, aba, b(a^3)ba}
        
        {a, b, b^2, ba, aba, bababa}
        
        {a, b, b^2, ba, aba, b^2(a^2)ba}
        
        {a, b, b^2, ba, aba, b^3aba}
      - {a, b, b^2, a(b^2), ba} (30 descendants)
        
        {a, b, b^2, a(b^2), ba, b(a^2)}
        
        {a, b, b^2, a(b^2), ba, bab}
        
        {a, b, b^2, a(b^2), ba, b^2a}
        
        {a, b, b^2, b^3, a(b^2), ba}
        
        {a, b, b^2, a(b^2), ba, a^2ba}
        
        {a, b, b^2, a(b^2), ba, a^2(b^2)}
        
        {a, b, b^2, a(b^2), ba, a(b^2)a}
        
        {a, b, b^2, a(b^2), a(b^3), ba}
        
        {a, b, b^2, a(b^2), ba, b(a^3)}
        
        {a, b, b^2, a(b^2), ba, b(a^2)b}
        
        {a, b, b^2, a(b^2), ba, baba}
        
        {a, b, b^2, a(b^2), ba, ba(b^2)}
        
        {a, b, b^2, a(b^2), ba, b^2(a^2)}
        
        {a, b, b^2, a(b^2), ba, b^2ab}
        
        {a, b, b^2, a(b^2), ba, b^3a}
        
        {a, b, b^2, b^4, a(b^2), ba}
        
        {a, b, b^2, a(b^2), ba, a^3(b^2)}
        
        {a, b, b^2, a(b^2), ba, aba(b^2)}
        
        {a, b, b^2, a(b^2), ba, b(a^2)ba}
        
        {a, b, b^2, a(b^2), ba, b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), ba, ba(b^2)a}
        
        {a, b, b^2, a(b^2), ba, ba(b^3)}
        
        {a, b, b^2, a(b^2), ba, b^2aba}
        
        {a, b, b^2, a(b^2), ba, b^2a(b^2)}
        
        {a, b, b^2, a(b^2), ba, b^4a}
        
        {a, b, b^2, b^5, a(b^2), ba}
        
        {a, b, b^2, a(b^2), ba, b(a^3)(b^2)}
        
        {a, b, b^2, a(b^2), ba, baba(b^2)}
        
        {a, b, b^2, a(b^2), ba, b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), ba, b^3a(b^2)}
      - {a, b, b^2, ba, b(a^2)} (29 descendants)
        
        {a, b, b^2, ba, b(a^2), bab}
        
        {a, b, b^2, ba, b(a^2), b^2a}
        
        {a, b, b^2, b^3, ba, b(a^2)}
        
        {a, b, b^2, ba, b(a^2), a^2ba}
        
        {a, b, b^2, ba, b(a^2), a^2(b^2)}
        
        {a, b, b^2, ba, b(a^2), a(b^2)a}
        
        {a, b, b^2, a(b^3), ba, b(a^2)}
        
        {a, b, b^2, ba, b(a^2), b(a^3)}
        
        {a, b, b^2, ba, b(a^2), b(a^2)b}
        
        {a, b, b^2, ba, b(a^2), baba}
        
        {a, b, b^2, ba, b(a^2), ba(b^2)}
        
        {a, b, b^2, ba, b(a^2), b^2(a^2)}
        
        {a, b, b^2, ba, b(a^2), b^2ab}
        
        {a, b, b^2, ba, b(a^2), b^3a}
        
        {a, b, b^2, b^4, ba, b(a^2)}
        
        {a, b, b^2, ba, b(a^2), b(a^4)}
        
        {a, b, b^2, ba, b(a^2), b(a^3)b}
        
        {a, b, b^2, ba, b(a^2), b(a^2)ba}
        
        {a, b, b^2, ba, b(a^2), b(a^2)(b^2)}
        
        {a, b, b^2, ba, b(a^2), ba(b^2)a}
        
        {a, b, b^2, ba, b(a^2), ba(b^3)}
        
        {a, b, b^2, ba, b(a^2), b^2aba}
        
        {a, b, b^2, ba, b(a^2), b^2a(b^2)}
        
        {a, b, b^2, ba, b(a^2), b^4a}
        
        {a, b, b^2, b^5, ba, b(a^2)}
        
        {a, b, b^2, ba, b(a^2), b(a^3)ba}
        
        {a, b, b^2, ba, b(a^2), b(a^3)(b^2)}
        
        {a, b, b^2, ba, b(a^2), b(a^2)(b^2)a}
        
        {a, b, b^2, ba, b(a^2), b(a^2)(b^3)}
      - {a, b, b^2, ba, bab} (28 descendants)
        
        {a, b, b^2, ba, b^2a, bab}
        
        {a, b, b^2, b^3, ba, bab}
        
        {a, b, b^2, ba, bab, a^2ba}
        
        {a, b, b^2, ba, a^2(b^2), bab}
        
        {a, b, b^2, ba, a(b^2)a, bab}
        
        {a, b, b^2, a(b^3), ba, bab}
        
        {a, b, b^2, ba, b(a^3), bab}
        
        {a, b, b^2, ba, bab, b(a^2)b}
        
        {a, b, b^2, ba, bab, baba}
        
        {a, b, b^2, ba, bab, ba(b^2)}
        
        {a, b, b^2, ba, b^2(a^2), bab}
        
        {a, b, b^2, ba, bab, b^2ab}
        
        {a, b, b^2, ba, b^3a, bab}
        
        {a, b, b^2, b^4, ba, bab}
        
        {a, b, b^2, ba, bab, b(a^2)ba}
        
        {a, b, b^2, ba, bab, b(a^2)(b^2)}
        
        {a, b, b^2, ba, bab, bab(a^2)}
        
        {a, b, b^2, ba, bab, babab}
        
        {a, b, b^2, ba, bab, ba(b^2)a}
        
        {a, b, b^2, ba, bab, ba(b^3)}
        
        {a, b, b^2, ba, bab, b^2aba}
        
        {a, b, b^2, ba, bab, b^2a(b^2)}
        
        {a, b, b^2, ba, b^4a, bab}
        
        {a, b, b^2, b^5, ba, bab}
        
        {a, b, b^2, ba, bab, bababa}
        
        {a, b, b^2, ba, bab, baba(b^2)}
        
        {a, b, b^2, ba, bab, ba(b^3)a}
        
        {a, b, b^2, ba, bab, ba(b^4)}
      - {a, b, b^2, ba, b^2a} (34 descendants)
        
        {a, b, b^2, b^3, ba, b^2a}
        
        {a, b, b^2, ba, b^2a, a^2ba}
        
        {a, b, b^2, ba, a^2(b^2), b^2a}
        
        {a, b, b^2, ba, b^2a, a(b^2)a}
        
        {a, b, b^2, a(b^3), ba, b^2a}
        
        {a, b, b^2, ba, b(a^3), b^2a}
        
        {a, b, b^2, ba, b^2a, b(a^2)b}
        
        {a, b, b^2, ba, b^2a, baba}
        
        {a, b, b^2, ba, b^2a, ba(b^2)}
        
        {a, b, b^2, ba, b^2a, b^2(a^2)}
        
        {a, b, b^2, ba, b^2a, b^2ab}
        
        {a, b, b^2, ba, b^2a, b^3a}
        
        {a, b, b^2, b^4, ba, b^2a}
        
        {a, b, b^2, ba, b^2a, a^2(b^2)a}
        
        {a, b, b^2, ba, b^2a, a(b^3)a}
        
        {a, b, b^2, ba, b^2a, b(a^2)ba}
        
        {a, b, b^2, ba, b^2a, b(a^2)(b^2)}
        
        {a, b, b^2, ba, b^2a, ba(b^2)a}
        
        {a, b, b^2, ba, b^2a, ba(b^3)}
        
        {a, b, b^2, ba, b^2a, b^2(a^3)}
        
        {a, b, b^2, ba, b^2a, b^2(a^2)b}
        
        {a, b, b^2, ba, b^2a, b^2aba}
        
        {a, b, b^2, ba, b^2a, b^2a(b^2)}
        
        {a, b, b^2, ba, b^2a, b^4a}
        
        {a, b, b^2, b^5, ba, b^2a}
        
        {a, b, b^2, ba, b^2a, b(a^2)(b^2)a}
        
        {a, b, b^2, ba, b^2a, ba(b^3)a}
        
        {a, b, b^2, ba, b^2a, b^2(a^2)ba}
        
        {a, b, b^2, ba, b^2a, b^2(a^2)(b^2)}
        
        {a, b, b^2, ba, b^2a, b^2a(b^2)a}
        
        {a, b, b^2, ba, b^2a, b^2a(b^3)}
        
        {a, b, b^2, ba, b^2a, b^5a}
        
        {a, b, b^2, ba, b^2a, b^2(a^2)(b^2)a}
        
        {a, b, b^2, ba, b^2a, b^2a(b^3)a}
      - {a, b, b^2, b^3, ba} (33 descendants)
        
        {a, b, b^2, b^3, ba, a^2ba}
        
        {a, b, b^2, b^3, ba, a^2(b^2)}
        
        {a, b, b^2, b^3, ba, a(b^2)a}
        
        {a, b, b^2, b^3, a(b^3), ba}
        
        {a, b, b^2, b^3, ba, b(a^3)}
        
        {a, b, b^2, b^3, ba, b(a^2)b}
        
        {a, b, b^2, b^3, ba, baba}
        
        {a, b, b^2, b^3, ba, ba(b^2)}
        
        {a, b, b^2, b^3, ba, b^2(a^2)}
        
        {a, b, b^2, b^3, ba, b^2ab}
        
        {a, b, b^2, b^3, ba, b^3a}
        
        {a, b, b^2, b^3, b^4, ba}
        
        {a, b, b^2, b^3, ba, a^2(b^3)}
        
        {a, b, b^2, b^3, a(b^4), ba}
        
        {a, b, b^2, b^3, ba, b(a^2)ba}
        
        {a, b, b^2, b^3, ba, b(a^2)(b^2)}
        
        {a, b, b^2, b^3, ba, ba(b^2)a}
        
        {a, b, b^2, b^3, ba, ba(b^3)}
        
        {a, b, b^2, b^3, ba, b^2aba}
        
        {a, b, b^2, b^3, ba, b^2a(b^2)}
        
        {a, b, b^2, b^3, ba, b^3(a^2)}
        
        {a, b, b^2, b^3, ba, b^3ab}
        
        {a, b, b^2, b^3, ba, b^4a}
        
        {a, b, b^2, b^3, b^5, ba}
        
        {a, b, b^2, b^3, ba, b(a^2)(b^3)}
        
        {a, b, b^2, b^3, ba, ba(b^4)}
        
        {a, b, b^2, b^3, ba, b^2a(b^3)}
        
        {a, b, b^2, b^3, ba, b^3aba}
        
        {a, b, b^2, b^3, ba, b^3a(b^2)}
        
        {a, b, b^2, b^3, ba, b^5a}
        
        {a, b, b^2, b^3, b^6, ba}
        
        {a, b, b^2, b^3, ba, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, ba}
      - {a, b, b^2, ba, a^2ba} (19 descendants)
        
        {a, b, b^2, ba, a^2(b^2), a^2ba}
        
        {a, b, b^2, ba, a(b^2)a, a^2ba}
        
        {a, b, b^2, a(b^3), ba, a^2ba}
        
        {a, b, b^2, ba, b(a^3), a^2ba}
        
        {a, b, b^2, ba, b(a^2)b, a^2ba}
        
        {a, b, b^2, ba, a^2ba, baba}
        
        {a, b, b^2, ba, ba(b^2), a^2ba}
        
        {a, b, b^2, ba, b^2(a^2), a^2ba}
        
        {a, b, b^2, ba, a^2ba, b^2ab}
        
        {a, b, b^2, ba, b^3a, a^2ba}
        
        {a, b, b^2, b^4, ba, a^2ba}
        
        {a, b, b^2, ba, a^2ba, b(a^2)ba}
        
        {a, b, b^2, ba, b(a^2)(b^2), a^2ba}
        
        {a, b, b^2, ba, a^2ba, ba(b^2)a}
        
        {a, b, b^2, ba, ba(b^3), a^2ba}
        
        {a, b, b^2, ba, a^2ba, b^2aba}
        
        {a, b, b^2, ba, a^2ba, b^2a(b^2)}
        
        {a, b, b^2, ba, b^4a, a^2ba}
        
        {a, b, b^2, b^5, ba, a^2ba}
      - {a, b, b^2, ba, a^2(b^2)} (18 descendants)
        
        {a, b, b^2, ba, a^2(b^2), a(b^2)a}
        
        {a, b, b^2, a(b^3), ba, a^2(b^2)}
        
        {a, b, b^2, ba, b(a^3), a^2(b^2)}
        
        {a, b, b^2, ba, a^2(b^2), b(a^2)b}
        
        {a, b, b^2, ba, a^2(b^2), baba}
        
        {a, b, b^2, ba, a^2(b^2), ba(b^2)}
        
        {a, b, b^2, ba, a^2(b^2), b^2(a^2)}
        
        {a, b, b^2, ba, a^2(b^2), b^2ab}
        
        {a, b, b^2, ba, a^2(b^2), b^3a}
        
        {a, b, b^2, b^4, ba, a^2(b^2)}
        
        {a, b, b^2, ba, a^2(b^2), b(a^2)ba}
        
        {a, b, b^2, ba, a^2(b^2), b(a^2)(b^2)}
        
        {a, b, b^2, ba, a^2(b^2), ba(b^2)a}
        
        {a, b, b^2, ba, a^2(b^2), ba(b^3)}
        
        {a, b, b^2, ba, a^2(b^2), b^2aba}
        
        {a, b, b^2, ba, a^2(b^2), b^2a(b^2)}
        
        {a, b, b^2, ba, a^2(b^2), b^4a}
        
        {a, b, b^2, b^5, ba, a^2(b^2)}
      - {a, b, b^2, ba, a(b^2)a} (17 descendants)
        
        {a, b, b^2, a(b^3), ba, a(b^2)a}
        
        {a, b, b^2, ba, b(a^3), a(b^2)a}
        
        {a, b, b^2, ba, a(b^2)a, b(a^2)b}
        
        {a, b, b^2, ba, a(b^2)a, baba}
        
        {a, b, b^2, ba, a(b^2)a, ba(b^2)}
        
        {a, b, b^2, ba, b^2(a^2), a(b^2)a}
        
        {a, b, b^2, ba, a(b^2)a, b^2ab}
        
        {a, b, b^2, ba, b^3a, a(b^2)a}
        
        {a, b, b^2, b^4, ba, a(b^2)a}
        
        {a, b, b^2, ba, a(b^2)a, b(a^2)ba}
        
        {a, b, b^2, ba, a(b^2)a, b(a^2)(b^2)}
        
        {a, b, b^2, ba, a(b^2)a, ba(b^2)a}
        
        {a, b, b^2, ba, a(b^2)a, ba(b^3)}
        
        {a, b, b^2, ba, a(b^2)a, b^2aba}
        
        {a, b, b^2, ba, a(b^2)a, b^2a(b^2)}
        
        {a, b, b^2, ba, b^4a, a(b^2)a}
        
        {a, b, b^2, b^5, ba, a(b^2)a}
      - {a, b, b^2, a(b^3), ba} (16 descendants)
        
        {a, b, b^2, a(b^3), ba, b(a^3)}
        
        {a, b, b^2, a(b^3), ba, b(a^2)b}
        
        {a, b, b^2, a(b^3), ba, baba}
        
        {a, b, b^2, a(b^3), ba, ba(b^2)}
        
        {a, b, b^2, a(b^3), ba, b^2(a^2)}
        
        {a, b, b^2, a(b^3), ba, b^2ab}
        
        {a, b, b^2, a(b^3), ba, b^3a}
        
        {a, b, b^2, b^4, a(b^3), ba}
        
        {a, b, b^2, a(b^3), ba, b(a^2)ba}
        
        {a, b, b^2, a(b^3), ba, b(a^2)(b^2)}
        
        {a, b, b^2, a(b^3), ba, ba(b^2)a}
        
        {a, b, b^2, a(b^3), ba, ba(b^3)}
        
        {a, b, b^2, a(b^3), ba, b^2aba}
        
        {a, b, b^2, a(b^3), ba, b^2a(b^2)}
        
        {a, b, b^2, a(b^3), ba, b^4a}
        
        {a, b, b^2, b^5, a(b^3), ba}
      - {a, b, b^2, ba, b(a^3)} (15 descendants)
        
        {a, b, b^2, ba, b(a^3), b(a^2)b}
        
        {a, b, b^2, ba, b(a^3), baba}
        
        {a, b, b^2, ba, b(a^3), ba(b^2)}
        
        {a, b, b^2, ba, b(a^3), b^2(a^2)}
        
        {a, b, b^2, ba, b(a^3), b^2ab}
        
        {a, b, b^2, ba, b(a^3), b^3a}
        
        {a, b, b^2, b^4, ba, b(a^3)}
        
        {a, b, b^2, ba, b(a^3), b(a^2)ba}
        
        {a, b, b^2, ba, b(a^3), b(a^2)(b^2)}
        
        {a, b, b^2, ba, b(a^3), ba(b^2)a}
        
        {a, b, b^2, ba, b(a^3), ba(b^3)}
        
        {a, b, b^2, ba, b(a^3), b^2aba}
        
        {a, b, b^2, ba, b(a^3), b^2a(b^2)}
        
        {a, b, b^2, ba, b(a^3), b^4a}
        
        {a, b, b^2, b^5, ba, b(a^3)}
      - {a, b, b^2, ba, b(a^2)b} (14 descendants)
        
        {a, b, b^2, ba, b(a^2)b, baba}
        
        {a, b, b^2, ba, ba(b^2), b(a^2)b}
        
        {a, b, b^2, ba, b^2(a^2), b(a^2)b}
        
        {a, b, b^2, ba, b(a^2)b, b^2ab}
        
        {a, b, b^2, ba, b^3a, b(a^2)b}
        
        {a, b, b^2, b^4, ba, b(a^2)b}
        
        {a, b, b^2, ba, b(a^2)b, b(a^2)ba}
        
        {a, b, b^2, ba, b(a^2)b, b(a^2)(b^2)}
        
        {a, b, b^2, ba, b(a^2)b, ba(b^2)a}
        
        {a, b, b^2, ba, ba(b^3), b(a^2)b}
        
        {a, b, b^2, ba, b(a^2)b, b^2aba}
        
        {a, b, b^2, ba, b(a^2)b, b^2a(b^2)}
        
        {a, b, b^2, ba, b^4a, b(a^2)b}
        
        {a, b, b^2, b^5, ba, b(a^2)b}
      - {a, b, b^2, ba, baba} (13 descendants)
        
        {a, b, b^2, ba, ba(b^2), baba}
        
        {a, b, b^2, ba, b^2(a^2), baba}
        
        {a, b, b^2, ba, b^2ab, baba}
        
        {a, b, b^2, ba, b^3a, baba}
        
        {a, b, b^2, b^4, ba, baba}
        
        {a, b, b^2, ba, baba, b(a^2)ba}
        
        {a, b, b^2, ba, b(a^2)(b^2), baba}
        
        {a, b, b^2, ba, baba, ba(b^2)a}
        
        {a, b, b^2, ba, ba(b^3), baba}
        
        {a, b, b^2, ba, baba, b^2aba}
        
        {a, b, b^2, ba, b^2a(b^2), baba}
        
        {a, b, b^2, ba, b^4a, baba}
        
        {a, b, b^2, b^5, ba, baba}
      - {a, b, b^2, ba, ba(b^2)} (13 descendants)
        
        {a, b, b^2, ba, b^2(a^2), ba(b^2)}
        
        {a, b, b^2, ba, ba(b^2), b^2ab}
        
        {a, b, b^2, ba, b^3a, ba(b^2)}
        
        {a, b, b^2, b^4, ba, ba(b^2)}
        
        {a, b, b^2, ba, ba(b^2), b(a^2)ba}
        
        {a, b, b^2, ba, ba(b^2), b(a^2)(b^2)}
        
        {a, b, b^2, ba, ba(b^2), ba(b^2)a}
        
        {a, b, b^2, ba, ba(b^2), ba(b^3)}
        
        {a, b, b^2, ba, ba(b^2), b^2aba}
        
        {a, b, b^2, ba, ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, ba, b^4a, ba(b^2)}
        
        {a, b, b^2, b^5, ba, ba(b^2)}
        
        {a, b, b^2, ba, ba(b^2), ba(b^2)a(b^2)}
      - {a, b, b^2, ba, b^2(a^2)} (11 descendants)
        
        {a, b, b^2, ba, b^2(a^2), b^2ab}
        
        {a, b, b^2, ba, b^2(a^2), b^3a}
        
        {a, b, b^2, b^4, ba, b^2(a^2)}
        
        {a, b, b^2, ba, b^2(a^2), b(a^2)ba}
        
        {a, b, b^2, ba, b^2(a^2), b(a^2)(b^2)}
        
        {a, b, b^2, ba, b^2(a^2), ba(b^2)a}
        
        {a, b, b^2, ba, b^2(a^2), ba(b^3)}
        
        {a, b, b^2, ba, b^2(a^2), b^2aba}
        
        {a, b, b^2, ba, b^2(a^2), b^2a(b^2)}
        
        {a, b, b^2, ba, b^2(a^2), b^4a}
        
        {a, b, b^2, b^5, ba, b^2(a^2)}
      - {a, b, b^2, ba, b^2ab} (10 descendants)
        
        {a, b, b^2, ba, b^3a, b^2ab}
        
        {a, b, b^2, b^4, ba, b^2ab}
        
        {a, b, b^2, ba, b^2ab, b(a^2)ba}
        
        {a, b, b^2, ba, b(a^2)(b^2), b^2ab}
        
        {a, b, b^2, ba, b^2ab, ba(b^2)a}
        
        {a, b, b^2, ba, ba(b^3), b^2ab}
        
        {a, b, b^2, ba, b^2ab, b^2aba}
        
        {a, b, b^2, ba, b^2ab, b^2a(b^2)}
        
        {a, b, b^2, ba, b^4a, b^2ab}
        
        {a, b, b^2, b^5, ba, b^2ab}
      - {a, b, b^2, ba, b^3a} (9 descendants)
        
        {a, b, b^2, b^4, ba, b^3a}
        
        {a, b, b^2, ba, b^3a, b(a^2)ba}
        
        {a, b, b^2, ba, b^3a, b(a^2)(b^2)}
        
        {a, b, b^2, ba, b^3a, ba(b^2)a}
        
        {a, b, b^2, ba, b^3a, ba(b^3)}
        
        {a, b, b^2, ba, b^3a, b^2aba}
        
        {a, b, b^2, ba, b^3a, b^2a(b^2)}
        
        {a, b, b^2, ba, b^3a, b^4a}
        
        {a, b, b^2, b^5, ba, b^3a}
      - {a, b, b^2, b^4, ba} (9 descendants)
        
        {a, b, b^2, b^4, ba, b(a^2)ba}
        
        {a, b, b^2, b^4, ba, b(a^2)(b^2)}
        
        {a, b, b^2, b^4, ba, ba(b^2)a}
        
        {a, b, b^2, b^4, ba, ba(b^3)}
        
        {a, b, b^2, b^4, ba, b^2aba}
        
        {a, b, b^2, b^4, ba, b^2a(b^2)}
        
        {a, b, b^2, b^4, ba, b^4a}
        
        {a, b, b^2, b^4, b^5, ba}
        
        {a, b, b^2, b^4, b^7, ba}
      - {a, b, b^2, ba, b(a^2)ba} (7 descendants)
        
        {a, b, b^2, ba, b(a^2)(b^2), b(a^2)ba}
        
        {a, b, b^2, ba, ba(b^2)a, b(a^2)ba}
        
        {a, b, b^2, ba, ba(b^3), b(a^2)ba}
        
        {a, b, b^2, ba, b(a^2)ba, b^2aba}
        
        {a, b, b^2, ba, b^2a(b^2), b(a^2)ba}
        
        {a, b, b^2, ba, b^4a, b(a^2)ba}
        
        {a, b, b^2, b^5, ba, b(a^2)ba}
      - {a, b, b^2, ba, b(a^2)(b^2)} (6 descendants)
        
        {a, b, b^2, ba, b(a^2)(b^2), ba(b^2)a}
        
        {a, b, b^2, ba, ba(b^3), b(a^2)(b^2)}
        
        {a, b, b^2, ba, b(a^2)(b^2), b^2aba}
        
        {a, b, b^2, ba, b(a^2)(b^2), b^2a(b^2)}
        
        {a, b, b^2, ba, b^4a, b(a^2)(b^2)}
        
        {a, b, b^2, b^5, ba, b(a^2)(b^2)}
      - {a, b, b^2, ba, ba(b^2)a} (5 descendants)
        
        {a, b, b^2, ba, ba(b^3), ba(b^2)a}
        
        {a, b, b^2, ba, ba(b^2)a, b^2aba}
        
        {a, b, b^2, ba, b^2a(b^2), ba(b^2)a}
        
        {a, b, b^2, ba, b^4a, ba(b^2)a}
        
        {a, b, b^2, b^5, ba, ba(b^2)a}
      - {a, b, b^2, ba, ba(b^3)} (4 descendants)
        
        {a, b, b^2, ba, ba(b^3), b^2aba}
        
        {a, b, b^2, ba, ba(b^3), b^2a(b^2)}
        
        {a, b, b^2, ba, b^4a, ba(b^3)}
        
        {a, b, b^2, b^5, ba, ba(b^3)}
      - {a, b, b^2, ba, b^2aba} (3 descendants)
        
        {a, b, b^2, ba, b^2a(b^2), b^2aba}
        
        {a, b, b^2, ba, b^4a, b^2aba}
        
        {a, b, b^2, b^5, ba, b^2aba}
      - {a, b, b^2, ba, b^2a(b^2)} (2 descendants)
        
        {a, b, b^2, ba, b^4a, b^2a(b^2)}
        
        {a, b, b^2, b^5, ba, b^2a(b^2)}
      - {a, b, b^2, ba, b^4a} (1 descendant)
        
        {a, b, b^2, b^5, ba, b^4a}
      - {a, b, b^2, b^5, ba} (0 descendants)
    - {a, b, a^3, ba} (17 descendants)
      - {a, b, a^3, ba, a^2b} (17 descendants)
        
        {a, b, a^3, ba, a^2b, aba}
        
        {a, b, a^3, a(b^2), ba, a^2b}
        
        {a, b, a^3, ba, b(a^2), a^2b}
        
        {a, b, a^3, ba, a^2b, bab}
        
        {a, b, a^3, ba, a^2b, b^2a}
        
        {a, b, a^3, b^3, ba, a^2b}
        
        {a, b, a^3, ba, a^2b, a^2ba}
        
        {a, b, a^3, ba, a^2b, a(b^2)a}
        
        {a, b, a^3, ba, b(a^3), a^2b}
        
        {a, b, a^3, ba, a^2b, b(a^2)b}
        
        {a, b, a^3, ba, a^2b, baba}
        
        {a, b, a^3, ba, a^2b, ba(b^2)}
        
        {a, b, a^3, ba, a^2b, b^3a}
        
        {a, b, a^3, a^5, ba, a^2b}
        
        {a, b, a^3, ba, a^2b, a^4b}
        
        {a, b, a^3, ba, a^2b, b(a^2)ba}
        
        {a, b, a^3, ba, a^2b, ba(b^2)a}
      - {a, b, a^3, ba, aba} (21 descendants)
        
        {a, b, a^3, a(b^2), ba, aba}
        
        {a, b, a^3, ba, b(a^2), aba}
        
        {a, b, a^3, ba, aba, bab}
        
        {a, b, a^3, ba, b^2a, aba}
        
        {a, b, a^3, b^3, ba, aba}
        
        {a, b, a^3, ba, aba, a^2ba}
        
        {a, b, a^3, ba, aba, a(b^2)a}
        
        {a, b, a^3, ba, b(a^3), aba}
        
        {a, b, a^3, ba, aba, b(a^2)b}
        
        {a, b, a^3, ba, aba, baba}
        
        {a, b, a^3, ba, aba, ba(b^2)}
        
        {a, b, a^3, ba, b^3a, aba}
        
        {a, b, a^3, a^5, ba, aba}
        
        {a, b, a^3, ba, aba, a^3ba}
        
        {a, b, a^3, ba, aba, ab(a^3)}
        
        {a, b, a^3, ba, aba, ababa}
        
        {a, b, a^3, ba, aba, b(a^2)ba}
        
        {a, b, a^3, ba, aba, ba(b^2)a}
        
        {a, b, a^3, ba, aba, b^2aba}
        
        {a, b, a^3, ba, aba, b(a^3)ba}
        
        {a, b, a^3, ba, aba, bababa}
      - {a, b, a^3, a(b^2), ba} (15 descendants)
        
        {a, b, a^3, a(b^2), ba, b(a^2)}
        
        {a, b, a^3, a(b^2), ba, bab}
        
        {a, b, a^3, a(b^2), ba, b^2a}
        
        {a, b, a^3, b^3, a(b^2), ba}
        
        {a, b, a^3, a(b^2), ba, a^2ba}
        
        {a, b, a^3, a(b^2), ba, a(b^2)a}
        
        {a, b, a^3, a(b^2), ba, b(a^3)}
        
        {a, b, a^3, a(b^2), ba, b(a^2)b}
        
        {a, b, a^3, a(b^2), ba, baba}
        
        {a, b, a^3, a(b^2), ba, ba(b^2)}
        
        {a, b, a^3, a(b^2), ba, b^3a}
        
        {a, b, a^3, a^5, a(b^2), ba}
        
        {a, b, a^3, a(b^2), ba, a^3(b^2)}
        
        {a, b, a^3, a(b^2), ba, b(a^2)ba}
        
        {a, b, a^3, a(b^2), ba, ba(b^2)a}
      - {a, b, a^3, ba, b(a^2)} (18 descendants)
        
        {a, b, a^3, ba, b(a^2), bab}
        
        {a, b, a^3, ba, b(a^2), b^2a}
        
        {a, b, a^3, b^3, ba, b(a^2)}
        
        {a, b, a^3, ba, b(a^2), a^2ba}
        
        {a, b, a^3, ba, b(a^2), a(b^2)a}
        
        {a, b, a^3, ba, b(a^2), b(a^3)}
        
        {a, b, a^3, ba, b(a^2), b(a^2)b}
        
        {a, b, a^3, ba, b(a^2), baba}
        
        {a, b, a^3, ba, b(a^2), ba(b^2)}
        
        {a, b, a^3, ba, b(a^2), b^3a}
        
        {a, b, a^3, a^5, ba, b(a^2)}
        
        {a, b, a^3, ba, b(a^2), b(a^4)}
        
        {a, b, a^3, ba, b(a^2), b(a^3)b}
        
        {a, b, a^3, ba, b(a^2), b(a^2)ba}
        
        {a, b, a^3, ba, b(a^2), b(a^2)(b^2)}
        
        {a, b, a^3, ba, b(a^2), ba(b^2)a}
        
        {a, b, a^3, ba, b(a^2), b(a^3)ba}
        
        {a, b, a^3, ba, b(a^2), b(a^2)(b^2)a}
      - {a, b, a^3, ba, bab} (17 descendants)
        
        {a, b, a^3, ba, b^2a, bab}
        
        {a, b, a^3, b^3, ba, bab}
        
        {a, b, a^3, ba, bab, a^2ba}
        
        {a, b, a^3, ba, a(b^2)a, bab}
        
        {a, b, a^3, ba, b(a^3), bab}
        
        {a, b, a^3, ba, bab, b(a^2)b}
        
        {a, b, a^3, ba, bab, baba}
        
        {a, b, a^3, ba, bab, ba(b^2)}
        
        {a, b, a^3, ba, b^3a, bab}
        
        {a, b, a^3, a^5, ba, bab}
        
        {a, b, a^3, ba, bab, b(a^2)ba}
        
        {a, b, a^3, ba, bab, bab(a^2)}
        
        {a, b, a^3, ba, bab, babab}
        
        {a, b, a^3, ba, bab, ba(b^2)a}
        
        {a, b, a^3, ba, bab, ba(b^3)}
        
        {a, b, a^3, ba, bab, bababa}
        
        {a, b, a^3, ba, bab, ba(b^3)a}
      - {a, b, a^3, ba, b^2a} (17 descendants)
        
        {a, b, a^3, b^3, ba, b^2a}
        
        {a, b, a^3, ba, b^2a, a^2ba}
        
        {a, b, a^3, ba, b^2a, a(b^2)a}
        
        {a, b, a^3, ba, b(a^3), b^2a}
        
        {a, b, a^3, ba, b^2a, b(a^2)b}
        
        {a, b, a^3, ba, b^2a, baba}
        
        {a, b, a^3, ba, b^2a, ba(b^2)}
        
        {a, b, a^3, ba, b^2a, b^3a}
        
        {a, b, a^3, a^5, ba, b^2a}
        
        {a, b, a^3, ba, b^2a, a^2(b^2)a}
        
        {a, b, a^3, ba, b^2a, a(b^3)a}
        
        {a, b, a^3, ba, b^2a, b(a^2)ba}
        
        {a, b, a^3, ba, b^2a, ba(b^2)a}
        
        {a, b, a^3, ba, b^2a, b^2(a^3)}
        
        {a, b, a^3, ba, b^2a, b^4a}
        
        {a, b, a^3, ba, b^2a, b(a^2)(b^2)a}
        
        {a, b, a^3, ba, b^2a, ba(b^3)a}
      - {a, b, a^3, b^3, ba} (11 descendants)
        
        {a, b, a^3, b^3, ba, a^2ba}
        
        {a, b, a^3, b^3, ba, a(b^2)a}
        
        {a, b, a^3, b^3, ba, b(a^3)}
        
        {a, b, a^3, b^3, ba, b(a^2)b}
        
        {a, b, a^3, b^3, ba, baba}
        
        {a, b, a^3, b^3, ba, ba(b^2)}
        
        {a, b, a^3, b^3, ba, b^3a}
        
        {a, b, a^3, a^5, b^3, ba}
        
        {a, b, a^3, b^3, ba, b(a^2)ba}
        
        {a, b, a^3, b^3, ba, ba(b^2)a}
        
        {a, b, a^3, b^3, b^5, ba}
      - {a, b, a^3, ba, a^2ba} (10 descendants)
        
        {a, b, a^3, ba, a(b^2)a, a^2ba}
        
        {a, b, a^3, ba, b(a^3), a^2ba}
        
        {a, b, a^3, ba, b(a^2)b, a^2ba}
        
        {a, b, a^3, ba, a^2ba, baba}
        
        {a, b, a^3, ba, ba(b^2), a^2ba}
        
        {a, b, a^3, ba, b^3a, a^2ba}
        
        {a, b, a^3, a^5, ba, a^2ba}
        
        {a, b, a^3, ba, a^2ba, b(a^2)ba}
        
        {a, b, a^3, ba, a^2ba, ba(b^2)a}
        
        {a, b, a^3, ba, a^2ba, a^4ba}
      - {a, b, a^3, ba, a(b^2)a} (9 descendants)
        
        {a, b, a^3, ba, b(a^3), a(b^2)a}
        
        {a, b, a^3, ba, a(b^2)a, b(a^2)b}
        
        {a, b, a^3, ba, a(b^2)a, baba}
        
        {a, b, a^3, ba, a(b^2)a, ba(b^2)}
        
        {a, b, a^3, ba, b^3a, a(b^2)a}
        
        {a, b, a^3, a^5, ba, a(b^2)a}
        
        {a, b, a^3, ba, a(b^2)a, b(a^2)ba}
        
        {a, b, a^3, ba, a(b^2)a, ba(b^2)a}
        
        {a, b, a^3, ba, a(b^2)a, a^3(b^2)a}
      - {a, b, a^3, ba, b(a^3)} (8 descendants)
        
        {a, b, a^3, ba, b(a^3), b(a^2)b}
        
        {a, b, a^3, ba, b(a^3), baba}
        
        {a, b, a^3, ba, b(a^3), ba(b^2)}
        
        {a, b, a^3, ba, b(a^3), b^3a}
        
        {a, b, a^3, a^5, ba, b(a^3)}
        
        {a, b, a^3, ba, b(a^3), b(a^2)ba}
        
        {a, b, a^3, ba, b(a^3), ba(b^2)a}
        
        {a, b, a^3, ba, b(a^3), b(a^5)}
      - {a, b, a^3, ba, b(a^2)b} (6 descendants)
        
        {a, b, a^3, ba, b(a^2)b, baba}
        
        {a, b, a^3, ba, ba(b^2), b(a^2)b}
        
        {a, b, a^3, ba, b^3a, b(a^2)b}
        
        {a, b, a^3, a^5, ba, b(a^2)b}
        
        {a, b, a^3, ba, b(a^2)b, b(a^2)ba}
        
        {a, b, a^3, ba, b(a^2)b, ba(b^2)a}
      - {a, b, a^3, ba, baba} (6 descendants)
        
        {a, b, a^3, ba, ba(b^2), baba}
        
        {a, b, a^3, ba, b^3a, baba}
        
        {a, b, a^3, a^5, ba, baba}
        
        {a, b, a^3, ba, baba, b(a^2)ba}
        
        {a, b, a^3, ba, baba, ba(b^2)a}
        
        {a, b, a^3, ba, baba, bab(a^3)}
      - {a, b, a^3, ba, ba(b^2)} (4 descendants)
        
        {a, b, a^3, ba, b^3a, ba(b^2)}
        
        {a, b, a^3, a^5, ba, ba(b^2)}
        
        {a, b, a^3, ba, ba(b^2), b(a^2)ba}
        
        {a, b, a^3, ba, ba(b^2), ba(b^2)a}
      - {a, b, a^3, ba, b^3a} (3 descendants)
        
        {a, b, a^3, a^5, ba, b^3a}
        
        {a, b, a^3, ba, b^3a, b(a^2)ba}
        
        {a, b, a^3, ba, b^3a, ba(b^2)a}
      - {a, b, a^3, a^5, ba} (3 descendants)
        
        {a, b, a^3, a^5, ba, b(a^2)ba}
        
        {a, b, a^3, a^5, ba, ba(b^2)a}
        
        {a, b, a^3, a^5, a^7, ba}
      - {a, b, a^3, ba, b(a^2)ba} (1 descendant)
        
        {a, b, a^3, ba, ba(b^2)a, b(a^2)ba}
      - {a, b, a^3, ba, ba(b^2)a} (0 descendants)
    - {a, b, ba, a^2b} (15 descendants)
      - {a, b, ba, a^2b, aba} (20 descendants)
        
        {a, b, a(b^2), ba, a^2b, aba}
        
        {a, b, ba, b(a^2), a^2b, aba}
        
        {a, b, ba, a^2b, aba, bab}
        
        {a, b, ba, a^2b, b^2a, aba}
        
        {a, b, b^3, ba, a^2b, aba}
        
        {a, b, ba, a^2b, aba, a^2ba}
        
        {a, b, ba, a^2b, aba, a(b^2)a}
        
        {a, b, ba, b(a^3), a^2b, aba}
        
        {a, b, ba, a^2b, aba, b(a^2)b}
        
        {a, b, ba, a^2b, aba, baba}
        
        {a, b, ba, a^2b, aba, ba(b^2)}
        
        {a, b, ba, a^2b, b^3a, aba}
        
        {a, b, ba, a^2b, aba, a^3ba}
        
        {a, b, ba, a^2b, aba, ab(a^2)b}
        
        {a, b, ba, a^2b, aba, ababa}
        
        {a, b, ba, a^2b, aba, b(a^2)ba}
        
        {a, b, ba, a^2b, aba, ba(b^2)a}
        
        {a, b, ba, a^2b, aba, b^2aba}
        
        {a, b, ba, a^2b, aba, b(a^3)ba}
        
        {a, b, ba, a^2b, aba, bababa}
      - {a, b, a(b^2), ba, a^2b} (13 descendants)
        
        {a, b, a(b^2), ba, b(a^2), a^2b}
        
        {a, b, a(b^2), ba, a^2b, bab}
        
        {a, b, a(b^2), ba, a^2b, b^2a}
        
        {a, b, b^3, a(b^2), ba, a^2b}
        
        {a, b, a(b^2), ba, a^2b, a^2ba}
        
        {a, b, a(b^2), ba, a^2b, a(b^2)a}
        
        {a, b, a(b^2), ba, b(a^3), a^2b}
        
        {a, b, a(b^2), ba, a^2b, b(a^2)b}
        
        {a, b, a(b^2), ba, a^2b, baba}
        
        {a, b, a(b^2), ba, a^2b, ba(b^2)}
        
        {a, b, a(b^2), ba, a^2b, b^3a}
        
        {a, b, a(b^2), ba, a^2b, b(a^2)ba}
        
        {a, b, a(b^2), ba, a^2b, ba(b^2)a}
      - {a, b, ba, b(a^2), a^2b} (18 descendants)
        
        {a, b, ba, b(a^2), a^2b, bab}
        
        {a, b, ba, b(a^2), a^2b, b^2a}
        
        {a, b, b^3, ba, b(a^2), a^2b}
        
        {a, b, ba, b(a^2), a^2b, a^2ba}
        
        {a, b, ba, b(a^2), a^2b, a(b^2)a}
        
        {a, b, ba, b(a^2), b(a^3), a^2b}
        
        {a, b, ba, b(a^2), a^2b, b(a^2)b}
        
        {a, b, ba, b(a^2), a^2b, baba}
        
        {a, b, ba, b(a^2), a^2b, ba(b^2)}
        
        {a, b, ba, b(a^2), a^2b, b^3a}
        
        {a, b, ba, b(a^2), a^2b, a^2b(a^2)}
        
        {a, b, ba, b(a^2), b(a^4), a^2b}
        
        {a, b, ba, b(a^2), a^2b, b(a^3)b}
        
        {a, b, ba, b(a^2), a^2b, b(a^2)ba}
        
        {a, b, ba, b(a^2), a^2b, b(a^2)(b^2)}
        
        {a, b, ba, b(a^2), a^2b, ba(b^2)a}
        
        {a, b, ba, b(a^2), a^2b, b(a^3)ba}
        
        {a, b, ba, b(a^2), a^2b, b(a^2)(b^2)a}
      - {a, b, ba, a^2b, bab} (17 descendants)
        
        {a, b, ba, a^2b, b^2a, bab}
        
        {a, b, b^3, ba, a^2b, bab}
        
        {a, b, ba, a^2b, bab, a^2ba}
        
        {a, b, ba, a^2b, a(b^2)a, bab}
        
        {a, b, ba, b(a^3), a^2b, bab}
        
        {a, b, ba, a^2b, bab, b(a^2)b}
        
        {a, b, ba, a^2b, bab, baba}
        
        {a, b, ba, a^2b, bab, ba(b^2)}
        
        {a, b, ba, a^2b, b^3a, bab}
        
        {a, b, ba, a^2b, bab, a^2bab}
        
        {a, b, ba, a^2b, bab, b(a^2)ba}
        
        {a, b, ba, a^2b, bab, bab(a^2)}
        
        {a, b, ba, a^2b, bab, babab}
        
        {a, b, ba, a^2b, bab, ba(b^2)a}
        
        {a, b, ba, a^2b, bab, ba(b^3)}
        
        {a, b, ba, a^2b, bab, bababa}
        
        {a, b, ba, a^2b, bab, ba(b^3)a}
      - {a, b, ba, a^2b, b^2a} (16 descendants)
        
        {a, b, b^3, ba, a^2b, b^2a}
        
        {a, b, ba, a^2b, b^2a, a^2ba}
        
        {a, b, ba, a^2b, b^2a, a(b^2)a}
        
        {a, b, ba, b(a^3), a^2b, b^2a}
        
        {a, b, ba, a^2b, b^2a, b(a^2)b}
        
        {a, b, ba, a^2b, b^2a, baba}
        
        {a, b, ba, a^2b, b^2a, ba(b^2)}
        
        {a, b, ba, a^2b, b^2a, b^3a}
        
        {a, b, ba, a^2b, b^2a, a^2(b^2)a}
        
        {a, b, ba, a^2b, b^2a, a(b^3)a}
        
        {a, b, ba, a^2b, b^2a, b(a^2)ba}
        
        {a, b, ba, a^2b, b^2a, ba(b^2)a}
        
        {a, b, ba, a^2b, b^2a, b^2(a^2)b}
        
        {a, b, ba, a^2b, b^2a, b^4a}
        
        {a, b, ba, a^2b, b^2a, b(a^2)(b^2)a}
        
        {a, b, ba, a^2b, b^2a, ba(b^3)a}
      - {a, b, b^3, ba, a^2b} (11 descendants)
        
        {a, b, b^3, ba, a^2b, a^2ba}
        
        {a, b, b^3, ba, a^2b, a(b^2)a}
        
        {a, b, b^3, ba, b(a^3), a^2b}
        
        {a, b, b^3, ba, a^2b, b(a^2)b}
        
        {a, b, b^3, ba, a^2b, baba}
        
        {a, b, b^3, ba, a^2b, ba(b^2)}
        
        {a, b, b^3, ba, a^2b, b^3a}
        
        {a, b, b^3, ba, a^2b, a^2(b^3)}
        
        {a, b, b^3, ba, a^2b, b(a^2)ba}
        
        {a, b, b^3, ba, a^2b, ba(b^2)a}
        
        {a, b, b^3, b^5, ba, a^2b}
      - {a, b, ba, a^2b, a^2ba} (8 descendants)
        
        {a, b, ba, a^2b, a(b^2)a, a^2ba}
        
        {a, b, ba, b(a^3), a^2b, a^2ba}
        
        {a, b, ba, a^2b, b(a^2)b, a^2ba}
        
        {a, b, ba, a^2b, a^2ba, baba}
        
        {a, b, ba, a^2b, ba(b^2), a^2ba}
        
        {a, b, ba, a^2b, b^3a, a^2ba}
        
        {a, b, ba, a^2b, a^2ba, b(a^2)ba}
        
        {a, b, ba, a^2b, a^2ba, ba(b^2)a}
      - {a, b, ba, a^2b, a(b^2)a} (7 descendants)
        
        {a, b, ba, b(a^3), a^2b, a(b^2)a}
        
        {a, b, ba, a^2b, a(b^2)a, b(a^2)b}
        
        {a, b, ba, a^2b, a(b^2)a, baba}
        
        {a, b, ba, a^2b, a(b^2)a, ba(b^2)}
        
        {a, b, ba, a^2b, b^3a, a(b^2)a}
        
        {a, b, ba, a^2b, a(b^2)a, b(a^2)ba}
        
        {a, b, ba, a^2b, a(b^2)a, ba(b^2)a}
      - {a, b, ba, b(a^3), a^2b} (7 descendants)
        
        {a, b, ba, b(a^3), a^2b, b(a^2)b}
        
        {a, b, ba, b(a^3), a^2b, baba}
        
        {a, b, ba, b(a^3), a^2b, ba(b^2)}
        
        {a, b, ba, b(a^3), a^2b, b^3a}
        
        {a, b, ba, b(a^3), a^2b, b(a^2)ba}
        
        {a, b, ba, b(a^3), a^2b, ba(b^2)a}
        
        {a, b, ba, b(a^3), a^2b, b(a^4)b}
      - {a, b, ba, a^2b, b(a^2)b} (5 descendants)
        
        {a, b, ba, a^2b, b(a^2)b, baba}
        
        {a, b, ba, a^2b, ba(b^2), b(a^2)b}
        
        {a, b, ba, a^2b, b^3a, b(a^2)b}
        
        {a, b, ba, a^2b, b(a^2)b, b(a^2)ba}
        
        {a, b, ba, a^2b, b(a^2)b, ba(b^2)a}
      - {a, b, ba, a^2b, baba} (6 descendants)
        
        {a, b, ba, a^2b, ba(b^2), baba}
        
        {a, b, ba, a^2b, b^3a, baba}
        
        {a, b, ba, a^2b, baba, b(a^2)ba}
        
        {a, b, ba, a^2b, baba, ba(b^2)a}
        
        {a, b, ba, a^2b, baba, a^2baba}
        
        {a, b, ba, a^2b, baba, bab(a^2)b}
      - {a, b, ba, a^2b, ba(b^2)} (3 descendants)
        
        {a, b, ba, a^2b, b^3a, ba(b^2)}
        
        {a, b, ba, a^2b, ba(b^2), b(a^2)ba}
        
        {a, b, ba, a^2b, ba(b^2), ba(b^2)a}
      - {a, b, ba, a^2b, b^3a} (3 descendants)
        
        {a, b, ba, a^2b, b^3a, b(a^2)ba}
        
        {a, b, ba, a^2b, b^3a, ba(b^2)a}
        
        {a, b, ba, a^2b, b^3a, a^2(b^3)a}
      - {a, b, ba, a^2b, b(a^2)ba} (1 descendant)
        
        {a, b, ba, a^2b, ba(b^2)a, b(a^2)ba}
      - {a, b, ba, a^2b, ba(b^2)a} (0 descendants)
    - {a, b, ba, aba} (19 descendants)
      - {a, b, a(b^2), ba, aba} (19 descendants)
        
        {a, b, a(b^2), ba, b(a^2), aba}
        
        {a, b, a(b^2), ba, aba, bab}
        
        {a, b, a(b^2), ba, b^2a, aba}
        
        {a, b, b^3, a(b^2), ba, aba}
        
        {a, b, a(b^2), ba, aba, a^2ba}
        
        {a, b, a(b^2), ba, aba, a(b^2)a}
        
        {a, b, a(b^2), ba, b(a^3), aba}
        
        {a, b, a(b^2), ba, aba, b(a^2)b}
        
        {a, b, a(b^2), ba, aba, baba}
        
        {a, b, a(b^2), ba, aba, ba(b^2)}
        
        {a, b, a(b^2), ba, b^3a, aba}
        
        {a, b, a(b^2), ba, aba, a^3ba}
        
        {a, b, a(b^2), ba, aba, ababa}
        
        {a, b, a(b^2), ba, aba, aba(b^2)}
        
        {a, b, a(b^2), ba, aba, b(a^2)ba}
        
        {a, b, a(b^2), ba, aba, ba(b^2)a}
        
        {a, b, a(b^2), ba, aba, b^2aba}
        
        {a, b, a(b^2), ba, aba, b(a^3)ba}
        
        {a, b, a(b^2), ba, aba, bababa}
      - {a, b, ba, b(a^2), aba} (23 descendants)
        
        {a, b, ba, b(a^2), aba, bab}
        
        {a, b, ba, b(a^2), b^2a, aba}
        
        {a, b, b^3, ba, b(a^2), aba}
        
        {a, b, ba, b(a^2), aba, a^2ba}
        
        {a, b, ba, b(a^2), aba, a(b^2)a}
        
        {a, b, ba, b(a^2), b(a^3), aba}
        
        {a, b, ba, b(a^2), aba, b(a^2)b}
        
        {a, b, ba, b(a^2), aba, baba}
        
        {a, b, ba, b(a^2), aba, ba(b^2)}
        
        {a, b, ba, b(a^2), b^3a, aba}
        
        {a, b, ba, b(a^2), aba, a^3ba}
        
        {a, b, ba, b(a^2), aba, ababa}
        
        {a, b, ba, b(a^2), b(a^4), aba}
        
        {a, b, ba, b(a^2), aba, b(a^3)b}
        
        {a, b, ba, b(a^2), aba, b(a^2)ba}
        
        {a, b, ba, b(a^2), aba, b(a^2)(b^2)}
        
        {a, b, ba, b(a^2), aba, ba(b^2)a}
        
        {a, b, ba, b(a^2), aba, b^2aba}
        
        {a, b, ba, b(a^2), aba, b(a^3)ba}
        
        {a, b, ba, b(a^2), aba, b(a^2)(b^2)a}
        
        {a, b, ba, b(a^2), aba, bababa}
        
        {a, b, ba, b(a^2), aba, b(a^4)ba}
        
        {a, b, ba, b(a^2), aba, b(a^2)baba}
      - {a, b, ba, aba, bab} (22 descendants)
        
        {a, b, ba, b^2a, aba, bab}
        
        {a, b, b^3, ba, aba, bab}
        
        {a, b, ba, aba, bab, a^2ba}
        
        {a, b, ba, aba, a(b^2)a, bab}
        
        {a, b, ba, b(a^3), aba, bab}
        
        {a, b, ba, aba, bab, b(a^2)b}
        
        {a, b, ba, aba, bab, baba}
        
        {a, b, ba, aba, bab, ba(b^2)}
        
        {a, b, ba, b^3a, aba, bab}
        
        {a, b, ba, aba, bab, a^3ba}
        
        {a, b, ba, aba, bab, ababa}
        
        {a, b, ba, aba, bab, b(a^2)ba}
        
        {a, b, ba, aba, bab, bab(a^2)}
        
        {a, b, ba, aba, bab, babab}
        
        {a, b, ba, aba, bab, ba(b^2)a}
        
        {a, b, ba, aba, bab, ba(b^3)}
        
        {a, b, ba, aba, bab, b^2aba}
        
        {a, b, ba, aba, bab, b(a^3)ba}
        
        {a, b, ba, aba, bab, bababa}
        
        {a, b, ba, aba, bab, ba(b^3)a}
        
        {a, b, ba, aba, bab, bab(a^2)ba}
        
        {a, b, ba, aba, bab, ba(b^2)aba}
      - {a, b, ba, b^2a, aba} (20 descendants)
        
        {a, b, b^3, ba, b^2a, aba}
        
        {a, b, ba, b^2a, aba, a^2ba}
        
        {a, b, ba, b^2a, aba, a(b^2)a}
        
        {a, b, ba, b(a^3), b^2a, aba}
        
        {a, b, ba, b^2a, aba, b(a^2)b}
        
        {a, b, ba, b^2a, aba, baba}
        
        {a, b, ba, b^2a, aba, ba(b^2)}
        
        {a, b, ba, b^2a, b^3a, aba}
        
        {a, b, ba, b^2a, aba, a^3ba}
        
        {a, b, ba, b^2a, aba, a^2(b^2)a}
        
        {a, b, ba, b^2a, aba, ababa}
        
        {a, b, ba, b^2a, aba, a(b^3)a}
        
        {a, b, ba, b^2a, aba, b(a^2)ba}
        
        {a, b, ba, b^2a, aba, ba(b^2)a}
        
        {a, b, ba, b^2a, aba, b^2aba}
        
        {a, b, ba, b^2a, b^4a, aba}
        
        {a, b, ba, b^2a, aba, b(a^3)ba}
        
        {a, b, ba, b^2a, aba, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, aba, bababa}
        
        {a, b, ba, b^2a, aba, ba(b^3)a}
      - {a, b, b^3, ba, aba} (15 descendants)
        
        {a, b, b^3, ba, aba, a^2ba}
        
        {a, b, b^3, ba, aba, a(b^2)a}
        
        {a, b, b^3, ba, b(a^3), aba}
        
        {a, b, b^3, ba, aba, b(a^2)b}
        
        {a, b, b^3, ba, aba, baba}
        
        {a, b, b^3, ba, aba, ba(b^2)}
        
        {a, b, b^3, ba, b^3a, aba}
        
        {a, b, b^3, ba, aba, a^3ba}
        
        {a, b, b^3, ba, aba, ababa}
        
        {a, b, b^3, ba, aba, b(a^2)ba}
        
        {a, b, b^3, ba, aba, ba(b^2)a}
        
        {a, b, b^3, ba, aba, b^2aba}
        
        {a, b, b^3, b^5, ba, aba}
        
        {a, b, b^3, ba, aba, b(a^3)ba}
        
        {a, b, b^3, ba, aba, bababa}
      - {a, b, ba, aba, a^2ba} (18 descendants)
        
        {a, b, ba, aba, a(b^2)a, a^2ba}
        
        {a, b, ba, b(a^3), aba, a^2ba}
        
        {a, b, ba, aba, b(a^2)b, a^2ba}
        
        {a, b, ba, aba, a^2ba, baba}
        
        {a, b, ba, aba, ba(b^2), a^2ba}
        
        {a, b, ba, b^3a, aba, a^2ba}
        
        {a, b, ba, aba, a^2ba, a^3ba}
        
        {a, b, ba, aba, a^2ba, ababa}
        
        {a, b, ba, aba, a^2ba, b(a^2)ba}
        
        {a, b, ba, aba, a^2ba, ba(b^2)a}
        
        {a, b, ba, aba, a^2ba, b^2aba}
        
        {a, b, ba, aba, a^2ba, a^4ba}
        
        {a, b, ba, aba, a^2ba, ab(a^2)ba}
        
        {a, b, ba, aba, a^2ba, b(a^3)ba}
        
        {a, b, ba, aba, a^2ba, bababa}
        
        {a, b, ba, aba, a^2ba, b^2(a^2)ba}
        
        {a, b, ba, aba, a^2ba, b(a^4)ba}
        
        {a, b, ba, aba, a^2ba, bab(a^2)ba}
      - {a, b, ba, aba, a(b^2)a} (13 descendants)
        
        {a, b, ba, b(a^3), aba, a(b^2)a}
        
        {a, b, ba, aba, a(b^2)a, b(a^2)b}
        
        {a, b, ba, aba, a(b^2)a, baba}
        
        {a, b, ba, aba, a(b^2)a, ba(b^2)}
        
        {a, b, ba, b^3a, aba, a(b^2)a}
        
        {a, b, ba, aba, a(b^2)a, a^3ba}
        
        {a, b, ba, aba, a(b^2)a, ababa}
        
        {a, b, ba, aba, a(b^2)a, b(a^2)ba}
        
        {a, b, ba, aba, a(b^2)a, ba(b^2)a}
        
        {a, b, ba, aba, a(b^2)a, b^2aba}
        
        {a, b, ba, aba, a(b^2)a, aba(b^2)a}
        
        {a, b, ba, aba, a(b^2)a, b(a^3)ba}
        
        {a, b, ba, aba, a(b^2)a, bababa}
      - {a, b, ba, b(a^3), aba} (11 descendants)
        
        {a, b, ba, b(a^3), aba, b(a^2)b}
        
        {a, b, ba, b(a^3), aba, baba}
        
        {a, b, ba, b(a^3), aba, ba(b^2)}
        
        {a, b, ba, b(a^3), b^3a, aba}
        
        {a, b, ba, b(a^3), aba, a^3ba}
        
        {a, b, ba, b(a^3), aba, ababa}
        
        {a, b, ba, b(a^3), aba, b(a^2)ba}
        
        {a, b, ba, b(a^3), aba, ba(b^2)a}
        
        {a, b, ba, b(a^3), aba, b^2aba}
        
        {a, b, ba, b(a^3), aba, b(a^3)ba}
        
        {a, b, ba, b(a^3), aba, bababa}
      - {a, b, ba, aba, b(a^2)b} (10 descendants)
        
        {a, b, ba, aba, b(a^2)b, baba}
        
        {a, b, ba, aba, ba(b^2), b(a^2)b}
        
        {a, b, ba, b^3a, aba, b(a^2)b}
        
        {a, b, ba, aba, b(a^2)b, a^3ba}
        
        {a, b, ba, aba, b(a^2)b, ababa}
        
        {a, b, ba, aba, b(a^2)b, b(a^2)ba}
        
        {a, b, ba, aba, b(a^2)b, ba(b^2)a}
        
        {a, b, ba, aba, b(a^2)b, b^2aba}
        
        {a, b, ba, aba, b(a^2)b, b(a^3)ba}
        
        {a, b, ba, aba, b(a^2)b, bababa}
      - {a, b, ba, aba, baba} (14 descendants)
        
        {a, b, ba, aba, ba(b^2), baba}
        
        {a, b, ba, b^3a, aba, baba}
        
        {a, b, ba, aba, a^3ba, baba}
        
        {a, b, ba, aba, baba, ababa}
        
        {a, b, ba, aba, baba, b(a^2)ba}
        
        {a, b, ba, aba, baba, ba(b^2)a}
        
        {a, b, ba, aba, baba, b^2aba}
        
        {a, b, ba, aba, baba, a^2baba}
        
        {a, b, ba, aba, baba, a(b^2)aba}
        
        {a, b, ba, aba, baba, b(a^3)ba}
        
        {a, b, ba, aba, baba, bababa}
        
        {a, b, ba, aba, baba, b^3aba}
        
        {a, b, ba, aba, baba, b(a^2)baba}
        
        {a, b, ba, aba, baba, ba(b^2)aba}
      - {a, b, ba, aba, ba(b^2)} (8 descendants)
        
        {a, b, ba, b^3a, aba, ba(b^2)}
        
        {a, b, ba, aba, ba(b^2), a^3ba}
        
        {a, b, ba, aba, ba(b^2), ababa}
        
        {a, b, ba, aba, ba(b^2), b(a^2)ba}
        
        {a, b, ba, aba, ba(b^2), ba(b^2)a}
        
        {a, b, ba, aba, ba(b^2), b^2aba}
        
        {a, b, ba, aba, ba(b^2), b(a^3)ba}
        
        {a, b, ba, aba, ba(b^2), bababa}
      - {a, b, ba, b^3a, aba} (7 descendants)
        
        {a, b, ba, b^3a, aba, a^3ba}
        
        {a, b, ba, b^3a, aba, ababa}
        
        {a, b, ba, b^3a, aba, b(a^2)ba}
        
        {a, b, ba, b^3a, aba, ba(b^2)a}
        
        {a, b, ba, b^3a, aba, b^2aba}
        
        {a, b, ba, b^3a, aba, b(a^3)ba}
        
        {a, b, ba, b^3a, aba, bababa}
      - {a, b, ba, aba, a^3ba} (7 descendants)
        
        {a, b, ba, aba, a^3ba, ababa}
        
        {a, b, ba, aba, a^3ba, b(a^2)ba}
        
        {a, b, ba, aba, a^3ba, ba(b^2)a}
        
        {a, b, ba, aba, a^3ba, b^2aba}
        
        {a, b, ba, aba, a^3ba, b(a^3)ba}
        
        {a, b, ba, aba, a^3ba, bababa}
        
        {a, b, ba, aba, a^3ba, ab(a^3)ba}
      - {a, b, ba, aba, ababa} (6 descendants)
        
        {a, b, ba, aba, b(a^2)ba, ababa}
        
        {a, b, ba, aba, ba(b^2)a, ababa}
        
        {a, b, ba, aba, b^2aba, ababa}
        
        {a, b, ba, aba, b(a^3)ba, ababa}
        
        {a, b, ba, aba, ababa, bababa}
        
        {a, b, ba, aba, ababa, abababa}
      - {a, b, ba, aba, b(a^2)ba} (4 descendants)
        
        {a, b, ba, aba, ba(b^2)a, b(a^2)ba}
        
        {a, b, ba, aba, b(a^2)ba, b^2aba}
        
        {a, b, ba, aba, b(a^2)ba, b(a^3)ba}
        
        {a, b, ba, aba, b(a^2)ba, bababa}
      - {a, b, ba, aba, ba(b^2)a} (3 descendants)
        
        {a, b, ba, aba, ba(b^2)a, b^2aba}
        
        {a, b, ba, aba, ba(b^2)a, b(a^3)ba}
        
        {a, b, ba, aba, ba(b^2)a, bababa}
      - {a, b, ba, aba, b^2aba} (2 descendants)
        
        {a, b, ba, aba, b(a^3)ba, b^2aba}
        
        {a, b, ba, aba, b^2aba, bababa}
      - {a, b, ba, aba, b(a^3)ba} (1 descendant)
        
        {a, b, ba, aba, b(a^3)ba, bababa}
      - {a, b, ba, aba, bababa} (0 descendants)
    - {a, b, a(b^2), ba} (13 descendants)
      - {a, b, a(b^2), ba, b(a^2)} (18 descendants)
        
        {a, b, a(b^2), ba, b(a^2), bab}
        
        {a, b, a(b^2), ba, b(a^2), b^2a}
        
        {a, b, b^3, a(b^2), ba, b(a^2)}
        
        {a, b, a(b^2), ba, b(a^2), a^2ba}
        
        {a, b, a(b^2), ba, b(a^2), a(b^2)a}
        
        {a, b, a(b^2), ba, b(a^2), b(a^3)}
        
        {a, b, a(b^2), ba, b(a^2), b(a^2)b}
        
        {a, b, a(b^2), ba, b(a^2), baba}
        
        {a, b, a(b^2), ba, b(a^2), ba(b^2)}
        
        {a, b, a(b^2), ba, b(a^2), b^3a}
        
        {a, b, a(b^2), ba, b(a^2), a(b^2)(a^2)}
        
        {a, b, a(b^2), ba, b(a^2), b(a^4)}
        
        {a, b, a(b^2), ba, b(a^2), b(a^3)b}
        
        {a, b, a(b^2), ba, b(a^2), b(a^2)ba}
        
        {a, b, a(b^2), ba, b(a^2), b(a^2)(b^2)}
        
        {a, b, a(b^2), ba, b(a^2), ba(b^2)a}
        
        {a, b, a(b^2), ba, b(a^2), b(a^3)ba}
        
        {a, b, a(b^2), ba, b(a^2), b(a^2)(b^2)a}
      - {a, b, a(b^2), ba, bab} (17 descendants)
        
        {a, b, a(b^2), ba, b^2a, bab}
        
        {a, b, b^3, a(b^2), ba, bab}
        
        {a, b, a(b^2), ba, bab, a^2ba}
        
        {a, b, a(b^2), ba, a(b^2)a, bab}
        
        {a, b, a(b^2), ba, b(a^3), bab}
        
        {a, b, a(b^2), ba, bab, b(a^2)b}
        
        {a, b, a(b^2), ba, bab, baba}
        
        {a, b, a(b^2), ba, bab, ba(b^2)}
        
        {a, b, a(b^2), ba, b^3a, bab}
        
        {a, b, a(b^2), ba, bab, a(b^2)ab}
        
        {a, b, a(b^2), ba, bab, b(a^2)ba}
        
        {a, b, a(b^2), ba, bab, bab(a^2)}
        
        {a, b, a(b^2), ba, bab, babab}
        
        {a, b, a(b^2), ba, bab, ba(b^2)a}
        
        {a, b, a(b^2), ba, bab, ba(b^3)}
        
        {a, b, a(b^2), ba, bab, bababa}
        
        {a, b, a(b^2), ba, bab, ba(b^3)a}
      - {a, b, a(b^2), ba, b^2a} (16 descendants)
        
        {a, b, b^3, a(b^2), ba, b^2a}
        
        {a, b, a(b^2), ba, b^2a, a^2ba}
        
        {a, b, a(b^2), ba, b^2a, a(b^2)a}
        
        {a, b, a(b^2), ba, b(a^3), b^2a}
        
        {a, b, a(b^2), ba, b^2a, b(a^2)b}
        
        {a, b, a(b^2), ba, b^2a, baba}
        
        {a, b, a(b^2), ba, b^2a, ba(b^2)}
        
        {a, b, a(b^2), ba, b^2a, b^3a}
        
        {a, b, a(b^2), ba, b^2a, a^2(b^2)a}
        
        {a, b, a(b^2), ba, b^2a, a(b^3)a}
        
        {a, b, a(b^2), ba, b^2a, b(a^2)ba}
        
        {a, b, a(b^2), ba, b^2a, ba(b^2)a}
        
        {a, b, a(b^2), ba, b^2a, b^2a(b^2)}
        
        {a, b, a(b^2), ba, b^2a, b^4a}
        
        {a, b, a(b^2), ba, b^2a, b(a^2)(b^2)a}
        
        {a, b, a(b^2), ba, b^2a, ba(b^3)a}
      - {a, b, b^3, a(b^2), ba} (11 descendants)
        
        {a, b, b^3, a(b^2), ba, a^2ba}
        
        {a, b, b^3, a(b^2), ba, a(b^2)a}
        
        {a, b, b^3, a(b^2), ba, b(a^3)}
        
        {a, b, b^3, a(b^2), ba, b(a^2)b}
        
        {a, b, b^3, a(b^2), ba, baba}
        
        {a, b, b^3, a(b^2), ba, ba(b^2)}
        
        {a, b, b^3, a(b^2), ba, b^3a}
        
        {a, b, b^3, a(b^2), a(b^4), ba}
        
        {a, b, b^3, a(b^2), ba, b(a^2)ba}
        
        {a, b, b^3, a(b^2), ba, ba(b^2)a}
        
        {a, b, b^3, b^5, a(b^2), ba}
      - {a, b, a(b^2), ba, a^2ba} (8 descendants)
        
        {a, b, a(b^2), ba, a(b^2)a, a^2ba}
        
        {a, b, a(b^2), ba, b(a^3), a^2ba}
        
        {a, b, a(b^2), ba, b(a^2)b, a^2ba}
        
        {a, b, a(b^2), ba, a^2ba, baba}
        
        {a, b, a(b^2), ba, ba(b^2), a^2ba}
        
        {a, b, a(b^2), ba, b^3a, a^2ba}
        
        {a, b, a(b^2), ba, a^2ba, b(a^2)ba}
        
        {a, b, a(b^2), ba, a^2ba, ba(b^2)a}
      - {a, b, a(b^2), ba, a(b^2)a} (7 descendants)
        
        {a, b, a(b^2), ba, b(a^3), a(b^2)a}
        
        {a, b, a(b^2), ba, a(b^2)a, b(a^2)b}
        
        {a, b, a(b^2), ba, a(b^2)a, baba}
        
        {a, b, a(b^2), ba, a(b^2)a, ba(b^2)}
        
        {a, b, a(b^2), ba, b^3a, a(b^2)a}
        
        {a, b, a(b^2), ba, a(b^2)a, b(a^2)ba}
        
        {a, b, a(b^2), ba, a(b^2)a, ba(b^2)a}
      - {a, b, a(b^2), ba, b(a^3)} (7 descendants)
        
        {a, b, a(b^2), ba, b(a^3), b(a^2)b}
        
        {a, b, a(b^2), ba, b(a^3), baba}
        
        {a, b, a(b^2), ba, b(a^3), ba(b^2)}
        
        {a, b, a(b^2), ba, b(a^3), b^3a}
        
        {a, b, a(b^2), ba, b(a^3), b(a^2)ba}
        
        {a, b, a(b^2), ba, b(a^3), ba(b^2)a}
        
        {a, b, a(b^2), ba, b(a^3), b(a^3)(b^2)}
      - {a, b, a(b^2), ba, b(a^2)b} (5 descendants)
        
        {a, b, a(b^2), ba, b(a^2)b, baba}
        
        {a, b, a(b^2), ba, ba(b^2), b(a^2)b}
        
        {a, b, a(b^2), ba, b^3a, b(a^2)b}
        
        {a, b, a(b^2), ba, b(a^2)b, b(a^2)ba}
        
        {a, b, a(b^2), ba, b(a^2)b, ba(b^2)a}
      - {a, b, a(b^2), ba, baba} (6 descendants)
        
        {a, b, a(b^2), ba, ba(b^2), baba}
        
        {a, b, a(b^2), ba, b^3a, baba}
        
        {a, b, a(b^2), ba, baba, b(a^2)ba}
        
        {a, b, a(b^2), ba, baba, ba(b^2)a}
        
        {a, b, a(b^2), ba, baba, a(b^2)aba}
        
        {a, b, a(b^2), ba, baba, baba(b^2)}
      - {a, b, a(b^2), ba, ba(b^2)} (3 descendants)
        
        {a, b, a(b^2), ba, b^3a, ba(b^2)}
        
        {a, b, a(b^2), ba, ba(b^2), b(a^2)ba}
        
        {a, b, a(b^2), ba, ba(b^2), ba(b^2)a}
      - {a, b, a(b^2), ba, b^3a} (3 descendants)
        
        {a, b, a(b^2), ba, b^3a, b(a^2)ba}
        
        {a, b, a(b^2), ba, b^3a, ba(b^2)a}
        
        {a, b, a(b^2), ba, b^3a, a(b^4)a}
      - {a, b, a(b^2), ba, b(a^2)ba} (1 descendant)
        
        {a, b, a(b^2), ba, ba(b^2)a, b(a^2)ba}
      - {a, b, a(b^2), ba, ba(b^2)a} (0 descendants)
    - {a, b, ba, b(a^2)} (17 descendants)
      - {a, b, ba, b(a^2), bab} (21 descendants)
        
        {a, b, ba, b(a^2), b^2a, bab}
        
        {a, b, b^3, ba, b(a^2), bab}
        
        {a, b, ba, b(a^2), bab, a^2ba}
        
        {a, b, ba, b(a^2), a(b^2)a, bab}
        
        {a, b, ba, b(a^2), b(a^3), bab}
        
        {a, b, ba, b(a^2), bab, b(a^2)b}
        
        {a, b, ba, b(a^2), bab, baba}
        
        {a, b, ba, b(a^2), bab, ba(b^2)}
        
        {a, b, ba, b(a^2), b^3a, bab}
        
        {a, b, ba, b(a^2), b(a^4), bab}
        
        {a, b, ba, b(a^2), bab, b(a^3)b}
        
        {a, b, ba, b(a^2), bab, b(a^2)ba}
        
        {a, b, ba, b(a^2), bab, b(a^2)(b^2)}
        
        {a, b, ba, b(a^2), bab, bab(a^2)}
        
        {a, b, ba, b(a^2), bab, babab}
        
        {a, b, ba, b(a^2), bab, ba(b^2)a}
        
        {a, b, ba, b(a^2), bab, ba(b^3)}
        
        {a, b, ba, b(a^2), bab, b(a^3)ba}
        
        {a, b, ba, b(a^2), bab, b(a^2)(b^2)a}
        
        {a, b, ba, b(a^2), bab, bababa}
        
        {a, b, ba, b(a^2), bab, ba(b^3)a}
      - {a, b, ba, b(a^2), b^2a} (21 descendants)
        
        {a, b, b^3, ba, b(a^2), b^2a}
        
        {a, b, ba, b(a^2), b^2a, a^2ba}
        
        {a, b, ba, b(a^2), b^2a, a(b^2)a}
        
        {a, b, ba, b(a^2), b(a^3), b^2a}
        
        {a, b, ba, b(a^2), b^2a, b(a^2)b}
        
        {a, b, ba, b(a^2), b^2a, baba}
        
        {a, b, ba, b(a^2), b^2a, ba(b^2)}
        
        {a, b, ba, b(a^2), b^2a, b^3a}
        
        {a, b, ba, b(a^2), b^2a, a^2(b^2)a}
        
        {a, b, ba, b(a^2), b^2a, a(b^3)a}
        
        {a, b, ba, b(a^2), b(a^4), b^2a}
        
        {a, b, ba, b(a^2), b^2a, b(a^3)b}
        
        {a, b, ba, b(a^2), b^2a, b(a^2)ba}
        
        {a, b, ba, b(a^2), b^2a, b(a^2)(b^2)}
        
        {a, b, ba, b(a^2), b^2a, ba(b^2)a}
        
        {a, b, ba, b(a^2), b^2a, b^4a}
        
        {a, b, ba, b(a^2), b^2a, b(a^3)ba}
        
        {a, b, ba, b(a^2), b^2a, b(a^2)(b^2)a}
        
        {a, b, ba, b(a^2), b^2a, ba(b^3)a}
        
        {a, b, ba, b(a^2), b^2a, b(a^3)(b^2)a}
        
        {a, b, ba, b(a^2), b^2a, b(a^2)(b^3)a}
      - {a, b, b^3, ba, b(a^2)} (16 descendants)
        
        {a, b, b^3, ba, b(a^2), a^2ba}
        
        {a, b, b^3, ba, b(a^2), a(b^2)a}
        
        {a, b, b^3, ba, b(a^2), b(a^3)}
        
        {a, b, b^3, ba, b(a^2), b(a^2)b}
        
        {a, b, b^3, ba, b(a^2), baba}
        
        {a, b, b^3, ba, b(a^2), ba(b^2)}
        
        {a, b, b^3, ba, b(a^2), b^3a}
        
        {a, b, b^3, ba, b(a^2), b(a^4)}
        
        {a, b, b^3, ba, b(a^2), b(a^3)b}
        
        {a, b, b^3, ba, b(a^2), b(a^2)ba}
        
        {a, b, b^3, ba, b(a^2), b(a^2)(b^2)}
        
        {a, b, b^3, ba, b(a^2), ba(b^2)a}
        
        {a, b, b^3, ba, b(a^2), b^3(a^2)}
        
        {a, b, b^3, b^5, ba, b(a^2)}
        
        {a, b, b^3, ba, b(a^2), b(a^3)ba}
        
        {a, b, b^3, ba, b(a^2), b(a^2)(b^2)a}
      - {a, b, ba, b(a^2), a^2ba} (13 descendants)
        
        {a, b, ba, b(a^2), a(b^2)a, a^2ba}
        
        {a, b, ba, b(a^2), b(a^3), a^2ba}
        
        {a, b, ba, b(a^2), b(a^2)b, a^2ba}
        
        {a, b, ba, b(a^2), a^2ba, baba}
        
        {a, b, ba, b(a^2), ba(b^2), a^2ba}
        
        {a, b, ba, b(a^2), b^3a, a^2ba}
        
        {a, b, ba, b(a^2), b(a^4), a^2ba}
        
        {a, b, ba, b(a^2), b(a^3)b, a^2ba}
        
        {a, b, ba, b(a^2), a^2ba, b(a^2)ba}
        
        {a, b, ba, b(a^2), b(a^2)(b^2), a^2ba}
        
        {a, b, ba, b(a^2), a^2ba, ba(b^2)a}
        
        {a, b, ba, b(a^2), a^2ba, b(a^3)ba}
        
        {a, b, ba, b(a^2), a^2ba, b(a^2)(b^2)a}
      - {a, b, ba, b(a^2), a(b^2)a} (12 descendants)
        
        {a, b, ba, b(a^2), b(a^3), a(b^2)a}
        
        {a, b, ba, b(a^2), a(b^2)a, b(a^2)b}
        
        {a, b, ba, b(a^2), a(b^2)a, baba}
        
        {a, b, ba, b(a^2), a(b^2)a, ba(b^2)}
        
        {a, b, ba, b(a^2), b^3a, a(b^2)a}
        
        {a, b, ba, b(a^2), b(a^4), a(b^2)a}
        
        {a, b, ba, b(a^2), a(b^2)a, b(a^3)b}
        
        {a, b, ba, b(a^2), a(b^2)a, b(a^2)ba}
        
        {a, b, ba, b(a^2), a(b^2)a, b(a^2)(b^2)}
        
        {a, b, ba, b(a^2), a(b^2)a, ba(b^2)a}
        
        {a, b, ba, b(a^2), a(b^2)a, b(a^3)ba}
        
        {a, b, ba, b(a^2), a(b^2)a, b(a^2)(b^2)a}
      - {a, b, ba, b(a^2), b(a^3)} (16 descendants)
        
        {a, b, ba, b(a^2), b(a^3), b(a^2)b}
        
        {a, b, ba, b(a^2), b(a^3), baba}
        
        {a, b, ba, b(a^2), b(a^3), ba(b^2)}
        
        {a, b, ba, b(a^2), b(a^3), b^3a}
        
        {a, b, ba, b(a^2), b(a^3), b(a^4)}
        
        {a, b, ba, b(a^2), b(a^3), b(a^3)b}
        
        {a, b, ba, b(a^2), b(a^3), b(a^2)ba}
        
        {a, b, ba, b(a^2), b(a^3), b(a^2)(b^2)}
        
        {a, b, ba, b(a^2), b(a^3), ba(b^2)a}
        
        {a, b, ba, b(a^2), b(a^3), b(a^5)}
        
        {a, b, ba, b(a^2), b(a^3), b(a^4)b}
        
        {a, b, ba, b(a^2), b(a^3), b(a^3)ba}
        
        {a, b, ba, b(a^2), b(a^3), b(a^3)(b^2)}
        
        {a, b, ba, b(a^2), b(a^3), b(a^2)(b^2)a}
        
        {a, b, ba, b(a^2), b(a^3), b(a^4)ba}
        
        {a, b, ba, b(a^2), b(a^3), b(a^3)(b^2)a}
      - {a, b, ba, b(a^2), b(a^2)b} (15 descendants)
        
        {a, b, ba, b(a^2), b(a^2)b, baba}
        
        {a, b, ba, b(a^2), ba(b^2), b(a^2)b}
        
        {a, b, ba, b(a^2), b^3a, b(a^2)b}
        
        {a, b, ba, b(a^2), b(a^4), b(a^2)b}
        
        {a, b, ba, b(a^2), b(a^2)b, b(a^3)b}
        
        {a, b, ba, b(a^2), b(a^2)b, b(a^2)ba}
        
        {a, b, ba, b(a^2), b(a^2)b, b(a^2)(b^2)}
        
        {a, b, ba, b(a^2), b(a^2)b, ba(b^2)a}
        
        {a, b, ba, b(a^2), b(a^2)b, b(a^3)ba}
        
        {a, b, ba, b(a^2), b(a^2)b, b(a^2)b(a^2)}
        
        {a, b, ba, b(a^2), b(a^2)b, b(a^2)bab}
        
        {a, b, ba, b(a^2), b(a^2)b, b(a^2)(b^2)a}
        
        {a, b, ba, b(a^2), b(a^2)b, b(a^2)(b^3)}
        
        {a, b, ba, b(a^2), b(a^2)b, b(a^2)baba}
        
        {a, b, ba, b(a^2), b(a^2)b, b(a^2)(b^3)a}
      - {a, b, ba, b(a^2), baba} (9 descendants)
        
        {a, b, ba, b(a^2), ba(b^2), baba}
        
        {a, b, ba, b(a^2), b^3a, baba}
        
        {a, b, ba, b(a^2), b(a^4), baba}
        
        {a, b, ba, b(a^2), b(a^3)b, baba}
        
        {a, b, ba, b(a^2), baba, b(a^2)ba}
        
        {a, b, ba, b(a^2), b(a^2)(b^2), baba}
        
        {a, b, ba, b(a^2), baba, ba(b^2)a}
        
        {a, b, ba, b(a^2), baba, b(a^3)ba}
        
        {a, b, ba, b(a^2), baba, b(a^2)(b^2)a}
      - {a, b, ba, b(a^2), ba(b^2)} (9 descendants)
        
        {a, b, ba, b(a^2), b^3a, ba(b^2)}
        
        {a, b, ba, b(a^2), b(a^4), ba(b^2)}
        
        {a, b, ba, b(a^2), ba(b^2), b(a^3)b}
        
        {a, b, ba, b(a^2), ba(b^2), b(a^2)ba}
        
        {a, b, ba, b(a^2), ba(b^2), b(a^2)(b^2)}
        
        {a, b, ba, b(a^2), ba(b^2), ba(b^2)a}
        
        {a, b, ba, b(a^2), ba(b^2), b(a^3)ba}
        
        {a, b, ba, b(a^2), ba(b^2), b(a^2)(b^2)a}
        
        {a, b, ba, b(a^2), ba(b^2), ba(b^2)(a^2)}
      - {a, b, ba, b(a^2), b^3a} (7 descendants)
        
        {a, b, ba, b(a^2), b(a^4), b^3a}
        
        {a, b, ba, b(a^2), b^3a, b(a^3)b}
        
        {a, b, ba, b(a^2), b^3a, b(a^2)ba}
        
        {a, b, ba, b(a^2), b^3a, b(a^2)(b^2)}
        
        {a, b, ba, b(a^2), b^3a, ba(b^2)a}
        
        {a, b, ba, b(a^2), b^3a, b(a^3)ba}
        
        {a, b, ba, b(a^2), b^3a, b(a^2)(b^2)a}
      - {a, b, ba, b(a^2), b(a^4)} (6 descendants)
        
        {a, b, ba, b(a^2), b(a^4), b(a^3)b}
        
        {a, b, ba, b(a^2), b(a^4), b(a^2)ba}
        
        {a, b, ba, b(a^2), b(a^4), b(a^2)(b^2)}
        
        {a, b, ba, b(a^2), b(a^4), ba(b^2)a}
        
        {a, b, ba, b(a^2), b(a^4), b(a^3)ba}
        
        {a, b, ba, b(a^2), b(a^4), b(a^2)(b^2)a}
      - {a, b, ba, b(a^2), b(a^3)b} (6 descendants)
        
        {a, b, ba, b(a^2), b(a^3)b, b(a^2)ba}
        
        {a, b, ba, b(a^2), b(a^2)(b^2), b(a^3)b}
        
        {a, b, ba, b(a^2), b(a^3)b, ba(b^2)a}
        
        {a, b, ba, b(a^2), b(a^3)b, b(a^3)ba}
        
        {a, b, ba, b(a^2), b(a^3)b, b(a^2)(b^2)a}
        
        {a, b, ba, b(a^2), b(a^3)b, b(a^3)b(a^2)}
      - {a, b, ba, b(a^2), b(a^2)ba} (4 descendants)
        
        {a, b, ba, b(a^2), b(a^2)(b^2), b(a^2)ba}
        
        {a, b, ba, b(a^2), ba(b^2)a, b(a^2)ba}
        
        {a, b, ba, b(a^2), b(a^2)ba, b(a^3)ba}
        
        {a, b, ba, b(a^2), b(a^2)ba, b(a^2)(b^2)a}
      - {a, b, ba, b(a^2), b(a^2)(b^2)} (4 descendants)
        
        {a, b, ba, b(a^2), b(a^2)(b^2), ba(b^2)a}
        
        {a, b, ba, b(a^2), b(a^2)(b^2), b(a^3)ba}
        
        {a, b, ba, b(a^2), b(a^2)(b^2), b(a^2)(b^2)a}
        
        {a, b, ba, b(a^2), b(a^2)(b^2), b(a^2)(b^2)(a^2)}
      - {a, b, ba, b(a^2), ba(b^2)a} (2 descendants)
        
        {a, b, ba, b(a^2), ba(b^2)a, b(a^3)ba}
        
        {a, b, ba, b(a^2), ba(b^2)a, b(a^2)(b^2)a}
      - {a, b, ba, b(a^2), b(a^3)ba} (1 descendant)
        
        {a, b, ba, b(a^2), b(a^2)(b^2)a, b(a^3)ba}
      - {a, b, ba, b(a^2), b(a^2)(b^2)a} (0 descendants)
    - {a, b, ba, bab} (16 descendants)
      - {a, b, ba, b^2a, bab} (21 descendants)
        
        {a, b, b^3, ba, b^2a, bab}
        
        {a, b, ba, b^2a, bab, a^2ba}
        
        {a, b, ba, b^2a, a(b^2)a, bab}
        
        {a, b, ba, b(a^3), b^2a, bab}
        
        {a, b, ba, b^2a, bab, b(a^2)b}
        
        {a, b, ba, b^2a, bab, baba}
        
        {a, b, ba, b^2a, bab, ba(b^2)}
        
        {a, b, ba, b^2a, b^3a, bab}
        
        {a, b, ba, b^2a, bab, a^2(b^2)a}
        
        {a, b, ba, b^2a, a(b^3)a, bab}
        
        {a, b, ba, b^2a, bab, b(a^2)ba}
        
        {a, b, ba, b^2a, bab, bab(a^2)}
        
        {a, b, ba, b^2a, bab, babab}
        
        {a, b, ba, b^2a, bab, ba(b^2)a}
        
        {a, b, ba, b^2a, bab, ba(b^3)}
        
        {a, b, ba, b^2a, b^4a, bab}
        
        {a, b, ba, b^2a, bab, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, bab, bababa}
        
        {a, b, ba, b^2a, bab, ba(b^3)a}
        
        {a, b, ba, b^2a, bab, baba(b^2)a}
        
        {a, b, ba, b^2a, bab, ba(b^4)a}
      - {a, b, b^3, ba, bab} (16 descendants)
        
        {a, b, b^3, ba, bab, a^2ba}
        
        {a, b, b^3, ba, a(b^2)a, bab}
        
        {a, b, b^3, ba, b(a^3), bab}
        
        {a, b, b^3, ba, bab, b(a^2)b}
        
        {a, b, b^3, ba, bab, baba}
        
        {a, b, b^3, ba, bab, ba(b^2)}
        
        {a, b, b^3, ba, b^3a, bab}
        
        {a, b, b^3, ba, bab, b(a^2)ba}
        
        {a, b, b^3, ba, bab, bab(a^2)}
        
        {a, b, b^3, ba, bab, babab}
        
        {a, b, b^3, ba, bab, ba(b^2)a}
        
        {a, b, b^3, ba, bab, ba(b^3)}
        
        {a, b, b^3, ba, bab, b^3ab}
        
        {a, b, b^3, b^5, ba, bab}
        
        {a, b, b^3, ba, bab, bababa}
        
        {a, b, b^3, ba, bab, ba(b^3)a}
      - {a, b, ba, bab, a^2ba} (13 descendants)
        
        {a, b, ba, a(b^2)a, bab, a^2ba}
        
        {a, b, ba, b(a^3), bab, a^2ba}
        
        {a, b, ba, bab, b(a^2)b, a^2ba}
        
        {a, b, ba, bab, a^2ba, baba}
        
        {a, b, ba, bab, ba(b^2), a^2ba}
        
        {a, b, ba, b^3a, bab, a^2ba}
        
        {a, b, ba, bab, a^2ba, b(a^2)ba}
        
        {a, b, ba, bab, a^2ba, bab(a^2)}
        
        {a, b, ba, bab, a^2ba, babab}
        
        {a, b, ba, bab, a^2ba, ba(b^2)a}
        
        {a, b, ba, bab, ba(b^3), a^2ba}
        
        {a, b, ba, bab, a^2ba, bababa}
        
        {a, b, ba, bab, a^2ba, ba(b^3)a}
      - {a, b, ba, a(b^2)a, bab} (12 descendants)
        
        {a, b, ba, b(a^3), a(b^2)a, bab}
        
        {a, b, ba, a(b^2)a, bab, b(a^2)b}
        
        {a, b, ba, a(b^2)a, bab, baba}
        
        {a, b, ba, a(b^2)a, bab, ba(b^2)}
        
        {a, b, ba, b^3a, a(b^2)a, bab}
        
        {a, b, ba, a(b^2)a, bab, b(a^2)ba}
        
        {a, b, ba, a(b^2)a, bab, bab(a^2)}
        
        {a, b, ba, a(b^2)a, bab, babab}
        
        {a, b, ba, a(b^2)a, bab, ba(b^2)a}
        
        {a, b, ba, a(b^2)a, bab, ba(b^3)}
        
        {a, b, ba, a(b^2)a, bab, bababa}
        
        {a, b, ba, a(b^2)a, bab, ba(b^3)a}
      - {a, b, ba, b(a^3), bab} (11 descendants)
        
        {a, b, ba, b(a^3), bab, b(a^2)b}
        
        {a, b, ba, b(a^3), bab, baba}
        
        {a, b, ba, b(a^3), bab, ba(b^2)}
        
        {a, b, ba, b(a^3), b^3a, bab}
        
        {a, b, ba, b(a^3), bab, b(a^2)ba}
        
        {a, b, ba, b(a^3), bab, bab(a^2)}
        
        {a, b, ba, b(a^3), bab, babab}
        
        {a, b, ba, b(a^3), bab, ba(b^2)a}
        
        {a, b, ba, b(a^3), bab, ba(b^3)}
        
        {a, b, ba, b(a^3), bab, bababa}
        
        {a, b, ba, b(a^3), bab, ba(b^3)a}
      - {a, b, ba, bab, b(a^2)b} (11 descendants)
        
        {a, b, ba, bab, b(a^2)b, baba}
        
        {a, b, ba, bab, ba(b^2), b(a^2)b}
        
        {a, b, ba, b^3a, bab, b(a^2)b}
        
        {a, b, ba, bab, b(a^2)b, b(a^2)ba}
        
        {a, b, ba, bab, b(a^2)b, bab(a^2)}
        
        {a, b, ba, bab, b(a^2)b, babab}
        
        {a, b, ba, bab, b(a^2)b, ba(b^2)a}
        
        {a, b, ba, bab, ba(b^3), b(a^2)b}
        
        {a, b, ba, bab, b(a^2)b, b(a^2)bab}
        
        {a, b, ba, bab, b(a^2)b, bababa}
        
        {a, b, ba, bab, b(a^2)b, ba(b^3)a}
      - {a, b, ba, bab, baba} (14 descendants)
        
        {a, b, ba, bab, ba(b^2), baba}
        
        {a, b, ba, b^3a, bab, baba}
        
        {a, b, ba, bab, baba, b(a^2)ba}
        
        {a, b, ba, bab, baba, bab(a^2)}
        
        {a, b, ba, bab, baba, babab}
        
        {a, b, ba, bab, baba, ba(b^2)a}
        
        {a, b, ba, bab, ba(b^3), baba}
        
        {a, b, ba, bab, baba, bab(a^3)}
        
        {a, b, ba, bab, baba, bab(a^2)b}
        
        {a, b, ba, bab, baba, bababa}
        
        {a, b, ba, bab, baba, baba(b^2)}
        
        {a, b, ba, bab, baba, ba(b^3)a}
        
        {a, b, ba, bab, baba, bab(a^2)ba}
        
        {a, b, ba, bab, baba, baba(b^2)a}
      - {a, b, ba, bab, ba(b^2)} (13 descendants)
        
        {a, b, ba, b^3a, bab, ba(b^2)}
        
        {a, b, ba, bab, ba(b^2), b(a^2)ba}
        
        {a, b, ba, bab, ba(b^2), bab(a^2)}
        
        {a, b, ba, bab, ba(b^2), babab}
        
        {a, b, ba, bab, ba(b^2), ba(b^2)a}
        
        {a, b, ba, bab, ba(b^2), ba(b^3)}
        
        {a, b, ba, bab, ba(b^2), bababa}
        
        {a, b, ba, bab, ba(b^2), ba(b^2)(a^2)}
        
        {a, b, ba, bab, ba(b^2), ba(b^2)ab}
        
        {a, b, ba, bab, ba(b^2), ba(b^3)a}
        
        {a, b, ba, bab, ba(b^2), ba(b^4)}
        
        {a, b, ba, bab, ba(b^2), ba(b^2)aba}
        
        {a, b, ba, bab, ba(b^2), ba(b^4)a}
      - {a, b, ba, b^3a, bab} (7 descendants)
        
        {a, b, ba, b^3a, bab, b(a^2)ba}
        
        {a, b, ba, b^3a, bab, bab(a^2)}
        
        {a, b, ba, b^3a, bab, babab}
        
        {a, b, ba, b^3a, bab, ba(b^2)a}
        
        {a, b, ba, b^3a, bab, ba(b^3)}
        
        {a, b, ba, b^3a, bab, bababa}
        
        {a, b, ba, b^3a, bab, ba(b^3)a}
      - {a, b, ba, bab, b(a^2)ba} (6 descendants)
        
        {a, b, ba, bab, bab(a^2), b(a^2)ba}
        
        {a, b, ba, bab, b(a^2)ba, babab}
        
        {a, b, ba, bab, ba(b^2)a, b(a^2)ba}
        
        {a, b, ba, bab, ba(b^3), b(a^2)ba}
        
        {a, b, ba, bab, b(a^2)ba, bababa}
        
        {a, b, ba, bab, ba(b^3)a, b(a^2)ba}
      - {a, b, ba, bab, bab(a^2)} (5 descendants)
        
        {a, b, ba, bab, bab(a^2), babab}
        
        {a, b, ba, bab, bab(a^2), ba(b^2)a}
        
        {a, b, ba, bab, ba(b^3), bab(a^2)}
        
        {a, b, ba, bab, bab(a^2), bababa}
        
        {a, b, ba, bab, bab(a^2), ba(b^3)a}
      - {a, b, ba, bab, babab} (5 descendants)
        
        {a, b, ba, bab, ba(b^2)a, babab}
        
        {a, b, ba, bab, ba(b^3), babab}
        
        {a, b, ba, bab, babab, bababa}
        
        {a, b, ba, bab, ba(b^3)a, babab}
        
        {a, b, ba, bab, babab, bababab}
      - {a, b, ba, bab, ba(b^2)a} (3 descendants)
        
        {a, b, ba, bab, ba(b^3), ba(b^2)a}
        
        {a, b, ba, bab, ba(b^2)a, bababa}
        
        {a, b, ba, bab, ba(b^2)a, ba(b^3)a}
      - {a, b, ba, bab, ba(b^3)} (3 descendants)
        
        {a, b, ba, bab, ba(b^3), bababa}
        
        {a, b, ba, bab, ba(b^3), ba(b^3)a}
        
        {a, b, ba, bab, ba(b^3), ba(b^3)ab}
      - {a, b, ba, bab, bababa} (1 descendant)
        
        {a, b, ba, bab, ba(b^3)a, bababa}
      - {a, b, ba, bab, ba(b^3)a} (0 descendants)
    - {a, b, ba, b^2a} (15 descendants)
      - {a, b, b^3, ba, b^2a} (15 descendants)
        
        {a, b, b^3, ba, b^2a, a^2ba}
        
        {a, b, b^3, ba, b^2a, a(b^2)a}
        
        {a, b, b^3, ba, b(a^3), b^2a}
        
        {a, b, b^3, ba, b^2a, b(a^2)b}
        
        {a, b, b^3, ba, b^2a, baba}
        
        {a, b, b^3, ba, b^2a, ba(b^2)}
        
        {a, b, b^3, ba, b^2a, b^3a}
        
        {a, b, b^3, ba, b^2a, a^2(b^2)a}
        
        {a, b, b^3, ba, b^2a, a(b^3)a}
        
        {a, b, b^3, ba, b^2a, b(a^2)ba}
        
        {a, b, b^3, ba, b^2a, ba(b^2)a}
        
        {a, b, b^3, ba, b^2a, b^4a}
        
        {a, b, b^3, b^5, ba, b^2a}
        
        {a, b, b^3, ba, b^2a, b(a^2)(b^2)a}
        
        {a, b, b^3, ba, b^2a, ba(b^3)a}
      - {a, b, ba, b^2a, a^2ba} (14 descendants)
        
        {a, b, ba, b^2a, a(b^2)a, a^2ba}
        
        {a, b, ba, b(a^3), b^2a, a^2ba}
        
        {a, b, ba, b^2a, b(a^2)b, a^2ba}
        
        {a, b, ba, b^2a, a^2ba, baba}
        
        {a, b, ba, b^2a, ba(b^2), a^2ba}
        
        {a, b, ba, b^2a, b^3a, a^2ba}
        
        {a, b, ba, b^2a, a^2ba, a^2(b^2)a}
        
        {a, b, ba, b^2a, a(b^3)a, a^2ba}
        
        {a, b, ba, b^2a, a^2ba, b(a^2)ba}
        
        {a, b, ba, b^2a, a^2ba, ba(b^2)a}
        
        {a, b, ba, b^2a, b^4a, a^2ba}
        
        {a, b, ba, b^2a, a^2ba, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, a^2ba, ba(b^3)a}
        
        {a, b, ba, b^2a, a^2ba, b^2(a^2)ba}
      - {a, b, ba, b^2a, a(b^2)a} (17 descendants)
        
        {a, b, ba, b(a^3), b^2a, a(b^2)a}
        
        {a, b, ba, b^2a, a(b^2)a, b(a^2)b}
        
        {a, b, ba, b^2a, a(b^2)a, baba}
        
        {a, b, ba, b^2a, a(b^2)a, ba(b^2)}
        
        {a, b, ba, b^2a, b^3a, a(b^2)a}
        
        {a, b, ba, b^2a, a(b^2)a, a^2(b^2)a}
        
        {a, b, ba, b^2a, a(b^2)a, a(b^3)a}
        
        {a, b, ba, b^2a, a(b^2)a, b(a^2)ba}
        
        {a, b, ba, b^2a, a(b^2)a, ba(b^2)a}
        
        {a, b, ba, b^2a, b^4a, a(b^2)a}
        
        {a, b, ba, b^2a, a(b^2)a, a^3(b^2)a}
        
        {a, b, ba, b^2a, a(b^2)a, aba(b^2)a}
        
        {a, b, ba, b^2a, a(b^2)a, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, a(b^2)a, ba(b^3)a}
        
        {a, b, ba, b^2a, a(b^2)a, b^2a(b^2)a}
        
        {a, b, ba, b^2a, a(b^2)a, b(a^3)(b^2)a}
        
        {a, b, ba, b^2a, a(b^2)a, baba(b^2)a}
      - {a, b, ba, b(a^3), b^2a} (11 descendants)
        
        {a, b, ba, b(a^3), b^2a, b(a^2)b}
        
        {a, b, ba, b(a^3), b^2a, baba}
        
        {a, b, ba, b(a^3), b^2a, ba(b^2)}
        
        {a, b, ba, b(a^3), b^2a, b^3a}
        
        {a, b, ba, b(a^3), b^2a, a^2(b^2)a}
        
        {a, b, ba, b(a^3), b^2a, a(b^3)a}
        
        {a, b, ba, b(a^3), b^2a, b(a^2)ba}
        
        {a, b, ba, b(a^3), b^2a, ba(b^2)a}
        
        {a, b, ba, b(a^3), b^2a, b^4a}
        
        {a, b, ba, b(a^3), b^2a, b(a^2)(b^2)a}
        
        {a, b, ba, b(a^3), b^2a, ba(b^3)a}
      - {a, b, ba, b^2a, b(a^2)b} (10 descendants)
        
        {a, b, ba, b^2a, b(a^2)b, baba}
        
        {a, b, ba, b^2a, ba(b^2), b(a^2)b}
        
        {a, b, ba, b^2a, b^3a, b(a^2)b}
        
        {a, b, ba, b^2a, b(a^2)b, a^2(b^2)a}
        
        {a, b, ba, b^2a, a(b^3)a, b(a^2)b}
        
        {a, b, ba, b^2a, b(a^2)b, b(a^2)ba}
        
        {a, b, ba, b^2a, b(a^2)b, ba(b^2)a}
        
        {a, b, ba, b^2a, b^4a, b(a^2)b}
        
        {a, b, ba, b^2a, b(a^2)b, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, b(a^2)b, ba(b^3)a}
      - {a, b, ba, b^2a, baba} (9 descendants)
        
        {a, b, ba, b^2a, ba(b^2), baba}
        
        {a, b, ba, b^2a, b^3a, baba}
        
        {a, b, ba, b^2a, a^2(b^2)a, baba}
        
        {a, b, ba, b^2a, a(b^3)a, baba}
        
        {a, b, ba, b^2a, baba, b(a^2)ba}
        
        {a, b, ba, b^2a, baba, ba(b^2)a}
        
        {a, b, ba, b^2a, b^4a, baba}
        
        {a, b, ba, b^2a, baba, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, baba, ba(b^3)a}
      - {a, b, ba, b^2a, ba(b^2)} (8 descendants)
        
        {a, b, ba, b^2a, b^3a, ba(b^2)}
        
        {a, b, ba, b^2a, ba(b^2), a^2(b^2)a}
        
        {a, b, ba, b^2a, a(b^3)a, ba(b^2)}
        
        {a, b, ba, b^2a, ba(b^2), b(a^2)ba}
        
        {a, b, ba, b^2a, ba(b^2), ba(b^2)a}
        
        {a, b, ba, b^2a, b^4a, ba(b^2)}
        
        {a, b, ba, b^2a, ba(b^2), b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, ba(b^2), ba(b^3)a}
      - {a, b, ba, b^2a, b^3a} (12 descendants)
        
        {a, b, ba, b^2a, b^3a, a^2(b^2)a}
        
        {a, b, ba, b^2a, b^3a, a(b^3)a}
        
        {a, b, ba, b^2a, b^3a, b(a^2)ba}
        
        {a, b, ba, b^2a, b^3a, ba(b^2)a}
        
        {a, b, ba, b^2a, b^3a, b^4a}
        
        {a, b, ba, b^2a, b^3a, a^2(b^3)a}
        
        {a, b, ba, b^2a, b^3a, a(b^4)a}
        
        {a, b, ba, b^2a, b^3a, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, b^3a, ba(b^3)a}
        
        {a, b, ba, b^2a, b^3a, b^5a}
        
        {a, b, ba, b^2a, b^3a, b(a^2)(b^3)a}
        
        {a, b, ba, b^2a, b^3a, ba(b^4)a}
      - {a, b, ba, b^2a, a^2(b^2)a} (7 descendants)
        
        {a, b, ba, b^2a, a(b^3)a, a^2(b^2)a}
        
        {a, b, ba, b^2a, a^2(b^2)a, b(a^2)ba}
        
        {a, b, ba, b^2a, a^2(b^2)a, ba(b^2)a}
        
        {a, b, ba, b^2a, b^4a, a^2(b^2)a}
        
        {a, b, ba, b^2a, a^2(b^2)a, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, a^2(b^2)a, ba(b^3)a}
        
        {a, b, ba, b^2a, a^2(b^2)a, b^2(a^2)(b^2)a}
      - {a, b, ba, b^2a, a(b^3)a} (6 descendants)
        
        {a, b, ba, b^2a, a(b^3)a, b(a^2)ba}
        
        {a, b, ba, b^2a, a(b^3)a, ba(b^2)a}
        
        {a, b, ba, b^2a, b^4a, a(b^3)a}
        
        {a, b, ba, b^2a, a(b^3)a, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, a(b^3)a, ba(b^3)a}
        
        {a, b, ba, b^2a, a(b^3)a, b^2a(b^3)a}
      - {a, b, ba, b^2a, b(a^2)ba} (4 descendants)
        
        {a, b, ba, b^2a, ba(b^2)a, b(a^2)ba}
        
        {a, b, ba, b^2a, b^4a, b(a^2)ba}
        
        {a, b, ba, b^2a, b(a^2)ba, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, ba(b^3)a, b(a^2)ba}
      - {a, b, ba, b^2a, ba(b^2)a} (3 descendants)
        
        {a, b, ba, b^2a, b^4a, ba(b^2)a}
        
        {a, b, ba, b^2a, ba(b^2)a, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, ba(b^2)a, ba(b^3)a}
      - {a, b, ba, b^2a, b^4a} (2 descendants)
        
        {a, b, ba, b^2a, b^4a, b(a^2)(b^2)a}
        
        {a, b, ba, b^2a, b^4a, ba(b^3)a}
      - {a, b, ba, b^2a, b(a^2)(b^2)a} (1 descendant)
        
        {a, b, ba, b^2a, ba(b^3)a, b(a^2)(b^2)a}
      - {a, b, ba, b^2a, ba(b^3)a} (0 descendants)
    - {a, b, b^3, ba} (10 descendants)
      - {a, b, b^3, ba, a^2ba} (9 descendants)
        
        {a, b, b^3, ba, a(b^2)a, a^2ba}
        
        {a, b, b^3, ba, b(a^3), a^2ba}
        
        {a, b, b^3, ba, b(a^2)b, a^2ba}
        
        {a, b, b^3, ba, a^2ba, baba}
        
        {a, b, b^3, ba, ba(b^2), a^2ba}
        
        {a, b, b^3, ba, b^3a, a^2ba}
        
        {a, b, b^3, ba, a^2ba, b(a^2)ba}
        
        {a, b, b^3, ba, a^2ba, ba(b^2)a}
        
        {a, b, b^3, b^5, ba, a^2ba}
      - {a, b, b^3, ba, a(b^2)a} (8 descendants)
        
        {a, b, b^3, ba, b(a^3), a(b^2)a}
        
        {a, b, b^3, ba, a(b^2)a, b(a^2)b}
        
        {a, b, b^3, ba, a(b^2)a, baba}
        
        {a, b, b^3, ba, a(b^2)a, ba(b^2)}
        
        {a, b, b^3, ba, b^3a, a(b^2)a}
        
        {a, b, b^3, ba, a(b^2)a, b(a^2)ba}
        
        {a, b, b^3, ba, a(b^2)a, ba(b^2)a}
        
        {a, b, b^3, b^5, ba, a(b^2)a}
      - {a, b, b^3, ba, b(a^3)} (7 descendants)
        
        {a, b, b^3, ba, b(a^3), b(a^2)b}
        
        {a, b, b^3, ba, b(a^3), baba}
        
        {a, b, b^3, ba, b(a^3), ba(b^2)}
        
        {a, b, b^3, ba, b(a^3), b^3a}
        
        {a, b, b^3, ba, b(a^3), b(a^2)ba}
        
        {a, b, b^3, ba, b(a^3), ba(b^2)a}
        
        {a, b, b^3, b^5, ba, b(a^3)}
      - {a, b, b^3, ba, b(a^2)b} (7 descendants)
        
        {a, b, b^3, ba, b(a^2)b, baba}
        
        {a, b, b^3, ba, ba(b^2), b(a^2)b}
        
        {a, b, b^3, ba, b^3a, b(a^2)b}
        
        {a, b, b^3, ba, b(a^2)b, b(a^2)ba}
        
        {a, b, b^3, ba, b(a^2)b, ba(b^2)a}
        
        {a, b, b^3, b^5, ba, b(a^2)b}
        
        {a, b, b^3, ba, b(a^2)b, b(a^2)(b^3)}
      - {a, b, b^3, ba, baba} (6 descendants)
        
        {a, b, b^3, ba, ba(b^2), baba}
        
        {a, b, b^3, ba, b^3a, baba}
        
        {a, b, b^3, ba, baba, b(a^2)ba}
        
        {a, b, b^3, ba, baba, ba(b^2)a}
        
        {a, b, b^3, b^5, ba, baba}
        
        {a, b, b^3, ba, baba, b^3aba}
      - {a, b, b^3, ba, ba(b^2)} (5 descendants)
        
        {a, b, b^3, ba, b^3a, ba(b^2)}
        
        {a, b, b^3, ba, ba(b^2), b(a^2)ba}
        
        {a, b, b^3, ba, ba(b^2), ba(b^2)a}
        
        {a, b, b^3, b^5, ba, ba(b^2)}
        
        {a, b, b^3, ba, ba(b^2), ba(b^4)}
      - {a, b, b^3, ba, b^3a} (4 descendants)
        
        {a, b, b^3, ba, b^3a, b(a^2)ba}
        
        {a, b, b^3, ba, b^3a, ba(b^2)a}
        
        {a, b, b^3, b^5, ba, b^3a}
        
        {a, b, b^3, ba, b^3a, b^5a}
      - {a, b, b^3, ba, b(a^2)ba} (2 descendants)
        
        {a, b, b^3, ba, ba(b^2)a, b(a^2)ba}
        
        {a, b, b^3, b^5, ba, b(a^2)ba}
      - {a, b, b^3, ba, ba(b^2)a} (1 descendant)
        
        {a, b, b^3, b^5, ba, ba(b^2)a}
      - {a, b, b^3, b^5, ba} (1 descendant)
        
        {a, b, b^3, b^5, b^7, ba}
    - {a, b, ba, a^2ba} (8 descendants)
      - {a, b, ba, a(b^2)a, a^2ba} (7 descendants)
        
        {a, b, ba, b(a^3), a(b^2)a, a^2ba}
        
        {a, b, ba, a(b^2)a, b(a^2)b, a^2ba}
        
        {a, b, ba, a(b^2)a, a^2ba, baba}
        
        {a, b, ba, a(b^2)a, ba(b^2), a^2ba}
        
        {a, b, ba, b^3a, a(b^2)a, a^2ba}
        
        {a, b, ba, a(b^2)a, a^2ba, b(a^2)ba}
        
        {a, b, ba, a(b^2)a, a^2ba, ba(b^2)a}
      - {a, b, ba, b(a^3), a^2ba} (7 descendants)
        
        {a, b, ba, b(a^3), b(a^2)b, a^2ba}
        
        {a, b, ba, b(a^3), a^2ba, baba}
        
        {a, b, ba, b(a^3), ba(b^2), a^2ba}
        
        {a, b, ba, b(a^3), b^3a, a^2ba}
        
        {a, b, ba, b(a^3), a^2ba, b(a^2)ba}
        
        {a, b, ba, b(a^3), a^2ba, ba(b^2)a}
        
        {a, b, ba, b(a^3), a^2ba, b(a^4)ba}
      - {a, b, ba, b(a^2)b, a^2ba} (5 descendants)
        
        {a, b, ba, b(a^2)b, a^2ba, baba}
        
        {a, b, ba, ba(b^2), b(a^2)b, a^2ba}
        
        {a, b, ba, b^3a, b(a^2)b, a^2ba}
        
        {a, b, ba, b(a^2)b, a^2ba, b(a^2)ba}
        
        {a, b, ba, b(a^2)b, a^2ba, ba(b^2)a}
      - {a, b, ba, a^2ba, baba} (5 descendants)
        
        {a, b, ba, ba(b^2), a^2ba, baba}
        
        {a, b, ba, b^3a, a^2ba, baba}
        
        {a, b, ba, a^2ba, baba, b(a^2)ba}
        
        {a, b, ba, a^2ba, baba, ba(b^2)a}
        
        {a, b, ba, a^2ba, baba, bab(a^2)ba}
      - {a, b, ba, ba(b^2), a^2ba} (3 descendants)
        
        {a, b, ba, b^3a, ba(b^2), a^2ba}
        
        {a, b, ba, ba(b^2), a^2ba, b(a^2)ba}
        
        {a, b, ba, ba(b^2), a^2ba, ba(b^2)a}
      - {a, b, ba, b^3a, a^2ba} (2 descendants)
        
        {a, b, ba, b^3a, a^2ba, b(a^2)ba}
        
        {a, b, ba, b^3a, a^2ba, ba(b^2)a}
      - {a, b, ba, a^2ba, b(a^2)ba} (3 descendants)
        
        {a, b, ba, a^2ba, ba(b^2)a, b(a^2)ba}
        
        {a, b, ba, a^2ba, b(a^2)ba, a^2b(a^2)ba}
        
        {a, b, ba, a^2ba, b(a^2)ba, b(a^2)b(a^2)ba}
      - {a, b, ba, a^2ba, ba(b^2)a} (0 descendants)
    - {a, b, ba, a(b^2)a} (7 descendants)
      - {a, b, ba, b(a^3), a(b^2)a} (7 descendants)
        
        {a, b, ba, b(a^3), a(b^2)a, b(a^2)b}
        
        {a, b, ba, b(a^3), a(b^2)a, baba}
        
        {a, b, ba, b(a^3), a(b^2)a, ba(b^2)}
        
        {a, b, ba, b(a^3), b^3a, a(b^2)a}
        
        {a, b, ba, b(a^3), a(b^2)a, b(a^2)ba}
        
        {a, b, ba, b(a^3), a(b^2)a, ba(b^2)a}
        
        {a, b, ba, b(a^3), a(b^2)a, b(a^3)(b^2)a}
      - {a, b, ba, a(b^2)a, b(a^2)b} (5 descendants)
        
        {a, b, ba, a(b^2)a, b(a^2)b, baba}
        
        {a, b, ba, a(b^2)a, ba(b^2), b(a^2)b}
        
        {a, b, ba, b^3a, a(b^2)a, b(a^2)b}
        
        {a, b, ba, a(b^2)a, b(a^2)b, b(a^2)ba}
        
        {a, b, ba, a(b^2)a, b(a^2)b, ba(b^2)a}
      - {a, b, ba, a(b^2)a, baba} (5 descendants)
        
        {a, b, ba, a(b^2)a, ba(b^2), baba}
        
        {a, b, ba, b^3a, a(b^2)a, baba}
        
        {a, b, ba, a(b^2)a, baba, b(a^2)ba}
        
        {a, b, ba, a(b^2)a, baba, ba(b^2)a}
        
        {a, b, ba, a(b^2)a, baba, baba(b^2)a}
      - {a, b, ba, a(b^2)a, ba(b^2)} (3 descendants)
        
        {a, b, ba, b^3a, a(b^2)a, ba(b^2)}
        
        {a, b, ba, a(b^2)a, ba(b^2), b(a^2)ba}
        
        {a, b, ba, a(b^2)a, ba(b^2), ba(b^2)a}
      - {a, b, ba, b^3a, a(b^2)a} (2 descendants)
        
        {a, b, ba, b^3a, a(b^2)a, b(a^2)ba}
        
        {a, b, ba, b^3a, a(b^2)a, ba(b^2)a}
      - {a, b, ba, a(b^2)a, b(a^2)ba} (1 descendant)
        
        {a, b, ba, a(b^2)a, ba(b^2)a, b(a^2)ba}
      - {a, b, ba, a(b^2)a, ba(b^2)a} (2 descendants)
        
        {a, b, ba, a(b^2)a, ba(b^2)a, a(b^2)a(b^2)a}
        
        {a, b, ba, a(b^2)a, ba(b^2)a, ba(b^2)a(b^2)a}
    - {a, b, ba, b(a^3)} (6 descendants)
      - {a, b, ba, b(a^3), b(a^2)b} (5 descendants)
        
        {a, b, ba, b(a^3), b(a^2)b, baba}
        
        {a, b, ba, b(a^3), ba(b^2), b(a^2)b}
        
        {a, b, ba, b(a^3), b^3a, b(a^2)b}
        
        {a, b, ba, b(a^3), b(a^2)b, b(a^2)ba}
        
        {a, b, ba, b(a^3), b(a^2)b, ba(b^2)a}
      - {a, b, ba, b(a^3), baba} (4 descendants)
        
        {a, b, ba, b(a^3), ba(b^2), baba}
        
        {a, b, ba, b(a^3), b^3a, baba}
        
        {a, b, ba, b(a^3), baba, b(a^2)ba}
        
        {a, b, ba, b(a^3), baba, ba(b^2)a}
      - {a, b, ba, b(a^3), ba(b^2)} (3 descendants)
        
        {a, b, ba, b(a^3), b^3a, ba(b^2)}
        
        {a, b, ba, b(a^3), ba(b^2), b(a^2)ba}
        
        {a, b, ba, b(a^3), ba(b^2), ba(b^2)a}
      - {a, b, ba, b(a^3), b^3a} (2 descendants)
        
        {a, b, ba, b(a^3), b^3a, b(a^2)ba}
        
        {a, b, ba, b(a^3), b^3a, ba(b^2)a}
      - {a, b, ba, b(a^3), b(a^2)ba} (1 descendant)
        
        {a, b, ba, b(a^3), ba(b^2)a, b(a^2)ba}
      - {a, b, ba, b(a^3), ba(b^2)a} (0 descendants)
    - {a, b, ba, b(a^2)b} (5 descendants)
      - {a, b, ba, b(a^2)b, baba} (5 descendants)
        
        {a, b, ba, ba(b^2), b(a^2)b, baba}
        
        {a, b, ba, b^3a, b(a^2)b, baba}
        
        {a, b, ba, b(a^2)b, baba, b(a^2)ba}
        
        {a, b, ba, b(a^2)b, baba, ba(b^2)a}
        
        {a, b, ba, b(a^2)b, baba, b(a^2)baba}
      - {a, b, ba, ba(b^2), b(a^2)b} (3 descendants)
        
        {a, b, ba, b^3a, ba(b^2), b(a^2)b}
        
        {a, b, ba, ba(b^2), b(a^2)b, b(a^2)ba}
        
        {a, b, ba, ba(b^2), b(a^2)b, ba(b^2)a}
      - {a, b, ba, b^3a, b(a^2)b} (3 descendants)
        
        {a, b, ba, b^3a, b(a^2)b, b(a^2)ba}
        
        {a, b, ba, b^3a, b(a^2)b, ba(b^2)a}
        
        {a, b, ba, b^3a, b(a^2)b, b(a^2)(b^3)a}
      - {a, b, ba, b(a^2)b, b(a^2)ba} (3 descendants)
        
        {a, b, ba, b(a^2)b, ba(b^2)a, b(a^2)ba}
        
        {a, b, ba, b(a^2)b, b(a^2)ba, b(a^2)b(a^2)b}
        
        {a, b, ba, b(a^2)b, b(a^2)ba, b(a^2)b(a^2)ba}
      - {a, b, ba, b(a^2)b, ba(b^2)a} (0 descendants)
    - {a, b, ba, baba} (4 descendants)
      - {a, b, ba, ba(b^2), baba} (4 descendants)
        
        {a, b, ba, b^3a, ba(b^2), baba}
        
        {a, b, ba, ba(b^2), baba, b(a^2)ba}
        
        {a, b, ba, ba(b^2), baba, ba(b^2)a}
        
        {a, b, ba, ba(b^2), baba, ba(b^2)aba}
      - {a, b, ba, b^3a, baba} (2 descendants)
        
        {a, b, ba, b^3a, baba, b(a^2)ba}
        
        {a, b, ba, b^3a, baba, ba(b^2)a}
      - {a, b, ba, baba, b(a^2)ba} (1 descendant)
        
        {a, b, ba, baba, ba(b^2)a, b(a^2)ba}
      - {a, b, ba, baba, ba(b^2)a} (0 descendants)
    - {a, b, ba, ba(b^2)} (3 descendants)
      - {a, b, ba, b^3a, ba(b^2)} (3 descendants)
        
        {a, b, ba, b^3a, ba(b^2), b(a^2)ba}
        
        {a, b, ba, b^3a, ba(b^2), ba(b^2)a}
        
        {a, b, ba, b^3a, ba(b^2), ba(b^4)a}
      - {a, b, ba, ba(b^2), b(a^2)ba} (1 descendant)
        
        {a, b, ba, ba(b^2), ba(b^2)a, b(a^2)ba}
      - {a, b, ba, ba(b^2), ba(b^2)a} (2 descendants)
        
        {a, b, ba, ba(b^2), ba(b^2)a, ba(b^2)a(b^2)}
        
        {a, b, ba, ba(b^2), ba(b^2)a, ba(b^2)a(b^2)a}
    - {a, b, ba, b^3a} (2 descendants)
      - {a, b, ba, b^3a, b(a^2)ba} (1 descendant)
        
        {a, b, ba, b^3a, ba(b^2)a, b(a^2)ba}
      - {a, b, ba, b^3a, ba(b^2)a} (0 descendants)
    - {a, b, ba, b(a^2)ba} (1 descendant)
      - {a, b, ba, ba(b^2)a, b(a^2)ba} (0 descendants)
    - {a, b, ba, ba(b^2)a} (0 descendants)
  - {a, b, b^2} (17 descendants)
    - {a, b, a^3, b^2} (17 descendants)
      - {a, b, a^3, b^2, a^2b} (17 descendants)
        
        {a, b, a^3, b^2, a^2b, aba}
        
        {a, b, a^3, b^2, a(b^2), a^2b}
        
        {a, b, a^3, b^2, b(a^2), a^2b}
        
        {a, b, a^3, b^2, a^2b, bab}
        
        {a, b, a^3, b^2, a^2b, b^2a}
        
        {a, b, a^3, b^2, b^3, a^2b}
        
        {a, b, a^3, b^2, a^2b, a^2(b^2)}
        
        {a, b, a^3, b^2, a(b^3), a^2b}
        
        {a, b, a^3, b^2, a^2b, ba(b^2)}
        
        {a, b, a^3, b^2, a^2b, b^2(a^2)}
        
        {a, b, a^3, b^2, a^2b, b^2ab}
        
        {a, b, a^3, b^2, a^2b, b^3a}
        
        {a, b, a^3, b^2, b^4, a^2b}
        
        {a, b, a^3, a^5, b^2, a^2b}
        
        {a, b, a^3, b^2, a^2b, a^4b}
        
        {a, b, a^3, b^2, a^2b, b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, a^2b}
      - {a, b, a^3, b^2, aba} (18 descendants)
        
        {a, b, a^3, b^2, a(b^2), aba}
        
        {a, b, a^3, b^2, b(a^2), aba}
        
        {a, b, a^3, b^2, aba, bab}
        
        {a, b, a^3, b^2, b^2a, aba}
        
        {a, b, a^3, b^2, b^3, aba}
        
        {a, b, a^3, b^2, a^2(b^2), aba}
        
        {a, b, a^3, b^2, a(b^3), aba}
        
        {a, b, a^3, b^2, aba, ba(b^2)}
        
        {a, b, a^3, b^2, b^2(a^2), aba}
        
        {a, b, a^3, b^2, aba, b^2ab}
        
        {a, b, a^3, b^2, b^3a, aba}
        
        {a, b, a^3, b^2, b^4, aba}
        
        {a, b, a^3, a^5, b^2, aba}
        
        {a, b, a^3, b^2, aba, a^3ba}
        
        {a, b, a^3, b^2, aba, ab(a^3)}
        
        {a, b, a^3, b^2, aba, ababa}
        
        {a, b, a^3, b^2, aba, b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, aba}
      - {a, b, a^3, b^2, a(b^2)} (19 descendants)
        
        {a, b, a^3, b^2, a(b^2), b(a^2)}
        
        {a, b, a^3, b^2, a(b^2), bab}
        
        {a, b, a^3, b^2, a(b^2), b^2a}
        
        {a, b, a^3, b^2, b^3, a(b^2)}
        
        {a, b, a^3, b^2, a(b^2), a^2(b^2)}
        
        {a, b, a^3, b^2, a(b^2), a(b^3)}
        
        {a, b, a^3, b^2, a(b^2), ba(b^2)}
        
        {a, b, a^3, b^2, a(b^2), b^2(a^2)}
        
        {a, b, a^3, b^2, a(b^2), b^2ab}
        
        {a, b, a^3, b^2, a(b^2), b^3a}
        
        {a, b, a^3, b^2, b^4, a(b^2)}
        
        {a, b, a^3, a^5, b^2, a(b^2)}
        
        {a, b, a^3, b^2, a(b^2), a^3(b^2)}
        
        {a, b, a^3, b^2, a(b^2), aba(b^2)}
        
        {a, b, a^3, b^2, a(b^2), b(a^2)(b^2)}
        
        {a, b, a^3, b^2, a(b^2), b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, a(b^2)}
        
        {a, b, a^3, b^2, a(b^2), b^2(a^2)(b^2)}
        
        {a, b, a^3, b^2, a(b^2), b^3a(b^2)}
      - {a, b, a^3, b^2, b(a^2)} (14 descendants)
        
        {a, b, a^3, b^2, b(a^2), bab}
        
        {a, b, a^3, b^2, b(a^2), b^2a}
        
        {a, b, a^3, b^2, b^3, b(a^2)}
        
        {a, b, a^3, b^2, b(a^2), a^2(b^2)}
        
        {a, b, a^3, b^2, a(b^3), b(a^2)}
        
        {a, b, a^3, b^2, b(a^2), ba(b^2)}
        
        {a, b, a^3, b^2, b(a^2), b^2(a^2)}
        
        {a, b, a^3, b^2, b(a^2), b^2ab}
        
        {a, b, a^3, b^2, b(a^2), b^3a}
        
        {a, b, a^3, b^2, b^4, b(a^2)}
        
        {a, b, a^3, a^5, b^2, b(a^2)}
        
        {a, b, a^3, b^2, b(a^2), b(a^4)}
        
        {a, b, a^3, b^2, b(a^2), b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, b(a^2)}
      - {a, b, a^3, b^2, bab} (13 descendants)
        
        {a, b, a^3, b^2, b^2a, bab}
        
        {a, b, a^3, b^2, b^3, bab}
        
        {a, b, a^3, b^2, a^2(b^2), bab}
        
        {a, b, a^3, b^2, a(b^3), bab}
        
        {a, b, a^3, b^2, bab, ba(b^2)}
        
        {a, b, a^3, b^2, b^2(a^2), bab}
        
        {a, b, a^3, b^2, bab, b^2ab}
        
        {a, b, a^3, b^2, b^3a, bab}
        
        {a, b, a^3, b^2, b^4, bab}
        
        {a, b, a^3, a^5, b^2, bab}
        
        {a, b, a^3, b^2, bab, babab}
        
        {a, b, a^3, b^2, bab, b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, bab}
      - {a, b, a^3, b^2, b^2a} (16 descendants)
        
        {a, b, a^3, b^2, b^3, b^2a}
        
        {a, b, a^3, b^2, a^2(b^2), b^2a}
        
        {a, b, a^3, b^2, a(b^3), b^2a}
        
        {a, b, a^3, b^2, b^2a, ba(b^2)}
        
        {a, b, a^3, b^2, b^2a, b^2(a^2)}
        
        {a, b, a^3, b^2, b^2a, b^2ab}
        
        {a, b, a^3, b^2, b^2a, b^3a}
        
        {a, b, a^3, b^2, b^4, b^2a}
        
        {a, b, a^3, a^5, b^2, b^2a}
        
        {a, b, a^3, b^2, b^2a, b^2(a^3)}
        
        {a, b, a^3, b^2, b^2a, b^2(a^2)b}
        
        {a, b, a^3, b^2, b^2a, b^2aba}
        
        {a, b, a^3, b^2, b^2a, b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, b^2a}
        
        {a, b, a^3, b^2, b^2a, b^2(a^2)(b^2)}
        
        {a, b, a^3, b^2, b^2a, b^2a(b^3)}
      - {a, b, a^3, b^2, b^3} (21 descendants)
        
        {a, b, a^3, b^2, b^3, a^2(b^2)}
        
        {a, b, a^3, b^2, b^3, a(b^3)}
        
        {a, b, a^3, b^2, b^3, ba(b^2)}
        
        {a, b, a^3, b^2, b^3, b^2(a^2)}
        
        {a, b, a^3, b^2, b^3, b^2ab}
        
        {a, b, a^3, b^2, b^3, b^3a}
        
        {a, b, a^3, b^2, b^3, b^4}
        
        {a, b, a^3, a^5, b^2, b^3}
        
        {a, b, a^3, b^2, b^3, a^2(b^3)}
        
        {a, b, a^3, b^2, b^3, a(b^4)}
        
        {a, b, a^3, b^2, b^3, ba(b^3)}
        
        {a, b, a^3, b^2, b^3, b^2a(b^2)}
        
        {a, b, a^3, b^2, b^3, b^3(a^2)}
        
        {a, b, a^3, b^2, b^3, b^3ab}
        
        {a, b, a^3, b^2, b^3, b^4a}
        
        {a, b, a^3, b^2, b^3, b^5}
        
        {a, b, a^3, b^2, b^3, b^2a(b^3)}
        
        {a, b, a^3, b^2, b^3, b^3a(b^2)}
        
        {a, b, a^3, b^2, b^3, b^6}
        
        {a, b, a^3, b^2, b^3, b^3a(b^3)}
        
        {a, b, a^3, b^2, b^3, b^7}
      - {a, b, a^3, b^2, a^2(b^2)} (10 descendants)
        
        {a, b, a^3, b^2, a(b^3), a^2(b^2)}
        
        {a, b, a^3, b^2, a^2(b^2), ba(b^2)}
        
        {a, b, a^3, b^2, a^2(b^2), b^2(a^2)}
        
        {a, b, a^3, b^2, a^2(b^2), b^2ab}
        
        {a, b, a^3, b^2, a^2(b^2), b^3a}
        
        {a, b, a^3, b^2, b^4, a^2(b^2)}
        
        {a, b, a^3, a^5, b^2, a^2(b^2)}
        
        {a, b, a^3, b^2, a^2(b^2), b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, a^2(b^2)}
        
        {a, b, a^3, b^2, a^2(b^2), a^4(b^2)}
      - {a, b, a^3, b^2, a(b^3)} (9 descendants)
        
        {a, b, a^3, b^2, a(b^3), ba(b^2)}
        
        {a, b, a^3, b^2, a(b^3), b^2(a^2)}
        
        {a, b, a^3, b^2, a(b^3), b^2ab}
        
        {a, b, a^3, b^2, a(b^3), b^3a}
        
        {a, b, a^3, b^2, b^4, a(b^3)}
        
        {a, b, a^3, a^5, b^2, a(b^3)}
        
        {a, b, a^3, b^2, a(b^3), b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, a(b^3)}
        
        {a, b, a^3, b^2, a(b^3), a^3(b^3)}
      - {a, b, a^3, b^2, ba(b^2)} (7 descendants)
        
        {a, b, a^3, b^2, b^2(a^2), ba(b^2)}
        
        {a, b, a^3, b^2, ba(b^2), b^2ab}
        
        {a, b, a^3, b^2, b^3a, ba(b^2)}
        
        {a, b, a^3, b^2, b^4, ba(b^2)}
        
        {a, b, a^3, a^5, b^2, ba(b^2)}
        
        {a, b, a^3, b^2, ba(b^2), b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, ba(b^2)}
      - {a, b, a^3, b^2, b^2(a^2)} (7 descendants)
        
        {a, b, a^3, b^2, b^2(a^2), b^2ab}
        
        {a, b, a^3, b^2, b^2(a^2), b^3a}
        
        {a, b, a^3, b^2, b^4, b^2(a^2)}
        
        {a, b, a^3, a^5, b^2, b^2(a^2)}
        
        {a, b, a^3, b^2, b^2(a^2), b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, b^2(a^2)}
        
        {a, b, a^3, b^2, b^2(a^2), b^2(a^4)}
      - {a, b, a^3, b^2, b^2ab} (5 descendants)
        
        {a, b, a^3, b^2, b^3a, b^2ab}
        
        {a, b, a^3, b^2, b^4, b^2ab}
        
        {a, b, a^3, a^5, b^2, b^2ab}
        
        {a, b, a^3, b^2, b^2ab, b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, b^2ab}
      - {a, b, a^3, b^2, b^3a} (5 descendants)
        
        {a, b, a^3, b^2, b^4, b^3a}
        
        {a, b, a^3, a^5, b^2, b^3a}
        
        {a, b, a^3, b^2, b^3a, b^2a(b^2)}
        
        {a, b, a^3, b^2, b^5, b^3a}
        
        {a, b, a^3, b^2, b^3a, b^3(a^3)}
      - {a, b, a^3, b^2, b^4} (4 descendants)
        
        {a, b, a^3, a^5, b^2, b^4}
        
        {a, b, a^3, b^2, b^4, b^2a(b^2)}
        
        {a, b, a^3, b^2, b^4, b^5}
        
        {a, b, a^3, b^2, b^4, b^7}
      - {a, b, a^3, a^5, b^2} (3 descendants)
        
        {a, b, a^3, a^5, b^2, b^2a(b^2)}
        
        {a, b, a^3, a^5, b^2, b^5}
        
        {a, b, a^3, a^5, a^7, b^2}
      - {a, b, a^3, b^2, b^2a(b^2)} (1 descendant)
        
        {a, b, a^3, b^2, b^5, b^2a(b^2)}
      - {a, b, a^3, b^2, b^5} (0 descendants)
    - {a, b, b^2, a^2b} (15 descendants)
      - {a, b, b^2, a^2b, aba} (16 descendants)
        
        {a, b, b^2, a(b^2), a^2b, aba}
        
        {a, b, b^2, b(a^2), a^2b, aba}
        
        {a, b, b^2, a^2b, aba, bab}
        
        {a, b, b^2, a^2b, b^2a, aba}
        
        {a, b, b^2, b^3, a^2b, aba}
        
        {a, b, b^2, a^2b, a^2(b^2), aba}
        
        {a, b, b^2, a(b^3), a^2b, aba}
        
        {a, b, b^2, a^2b, aba, ba(b^2)}
        
        {a, b, b^2, a^2b, b^2(a^2), aba}
        
        {a, b, b^2, a^2b, aba, b^2ab}
        
        {a, b, b^2, a^2b, b^3a, aba}
        
        {a, b, b^2, b^4, a^2b, aba}
        
        {a, b, b^2, a^2b, aba, ab(a^2)b}
        
        {a, b, b^2, a^2b, aba, ababa}
        
        {a, b, b^2, a^2b, aba, b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2b, aba}
      - {a, b, b^2, a(b^2), a^2b} (18 descendants)
        
        {a, b, b^2, a(b^2), b(a^2), a^2b}
        
        {a, b, b^2, a(b^2), a^2b, bab}
        
        {a, b, b^2, a(b^2), a^2b, b^2a}
        
        {a, b, b^2, b^3, a(b^2), a^2b}
        
        {a, b, b^2, a(b^2), a^2b, a^2(b^2)}
        
        {a, b, b^2, a(b^2), a(b^3), a^2b}
        
        {a, b, b^2, a(b^2), a^2b, ba(b^2)}
        
        {a, b, b^2, a(b^2), a^2b, b^2(a^2)}
        
        {a, b, b^2, a(b^2), a^2b, b^2ab}
        
        {a, b, b^2, a(b^2), a^2b, b^3a}
        
        {a, b, b^2, b^4, a(b^2), a^2b}
        
        {a, b, b^2, a(b^2), a^2b, a^3(b^2)}
        
        {a, b, b^2, a(b^2), a^2b, aba(b^2)}
        
        {a, b, b^2, a(b^2), a^2b, b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), a^2b, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), a^2b}
        
        {a, b, b^2, a(b^2), a^2b, b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), a^2b, b^3a(b^2)}
      - {a, b, b^2, b(a^2), a^2b} (14 descendants)
        
        {a, b, b^2, b(a^2), a^2b, bab}
        
        {a, b, b^2, b(a^2), a^2b, b^2a}
        
        {a, b, b^2, b^3, b(a^2), a^2b}
        
        {a, b, b^2, b(a^2), a^2b, a^2(b^2)}
        
        {a, b, b^2, a(b^3), b(a^2), a^2b}
        
        {a, b, b^2, b(a^2), a^2b, ba(b^2)}
        
        {a, b, b^2, b(a^2), a^2b, b^2(a^2)}
        
        {a, b, b^2, b(a^2), a^2b, b^2ab}
        
        {a, b, b^2, b(a^2), a^2b, b^3a}
        
        {a, b, b^2, b^4, b(a^2), a^2b}
        
        {a, b, b^2, b(a^2), a^2b, a^2b(a^2)}
        
        {a, b, b^2, b(a^2), a^2b, b(a^3)b}
        
        {a, b, b^2, b(a^2), a^2b, b^2a(b^2)}
        
        {a, b, b^2, b^5, b(a^2), a^2b}
      - {a, b, b^2, a^2b, bab} (13 descendants)
        
        {a, b, b^2, a^2b, b^2a, bab}
        
        {a, b, b^2, b^3, a^2b, bab}
        
        {a, b, b^2, a^2b, a^2(b^2), bab}
        
        {a, b, b^2, a(b^3), a^2b, bab}
        
        {a, b, b^2, a^2b, bab, ba(b^2)}
        
        {a, b, b^2, a^2b, b^2(a^2), bab}
        
        {a, b, b^2, a^2b, bab, b^2ab}
        
        {a, b, b^2, a^2b, b^3a, bab}
        
        {a, b, b^2, b^4, a^2b, bab}
        
        {a, b, b^2, a^2b, bab, a^2bab}
        
        {a, b, b^2, a^2b, bab, babab}
        
        {a, b, b^2, a^2b, bab, b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2b, bab}
      - {a, b, b^2, a^2b, b^2a} (16 descendants)
        
        {a, b, b^2, b^3, a^2b, b^2a}
        
        {a, b, b^2, a^2b, a^2(b^2), b^2a}
        
        {a, b, b^2, a(b^3), a^2b, b^2a}
        
        {a, b, b^2, a^2b, b^2a, ba(b^2)}
        
        {a, b, b^2, a^2b, b^2a, b^2(a^2)}
        
        {a, b, b^2, a^2b, b^2a, b^2ab}
        
        {a, b, b^2, a^2b, b^2a, b^3a}
        
        {a, b, b^2, b^4, a^2b, b^2a}
        
        {a, b, b^2, a^2b, b^2a, a^2(b^2)a}
        
        {a, b, b^2, a^2b, b^2a, b^2(a^3)}
        
        {a, b, b^2, a^2b, b^2a, b^2(a^2)b}
        
        {a, b, b^2, a^2b, b^2a, b^2aba}
        
        {a, b, b^2, a^2b, b^2a, b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2b, b^2a}
        
        {a, b, b^2, a^2b, b^2a, b^2(a^2)(b^2)}
        
        {a, b, b^2, a^2b, b^2a, b^2a(b^3)}
      - {a, b, b^2, b^3, a^2b} (20 descendants)
        
        {a, b, b^2, b^3, a^2b, a^2(b^2)}
        
        {a, b, b^2, b^3, a(b^3), a^2b}
        
        {a, b, b^2, b^3, a^2b, ba(b^2)}
        
        {a, b, b^2, b^3, a^2b, b^2(a^2)}
        
        {a, b, b^2, b^3, a^2b, b^2ab}
        
        {a, b, b^2, b^3, a^2b, b^3a}
        
        {a, b, b^2, b^3, b^4, a^2b}
        
        {a, b, b^2, b^3, a^2b, a^2(b^3)}
        
        {a, b, b^2, b^3, a(b^4), a^2b}
        
        {a, b, b^2, b^3, a^2b, ba(b^3)}
        
        {a, b, b^2, b^3, a^2b, b^2a(b^2)}
        
        {a, b, b^2, b^3, a^2b, b^3(a^2)}
        
        {a, b, b^2, b^3, a^2b, b^3ab}
        
        {a, b, b^2, b^3, a^2b, b^4a}
        
        {a, b, b^2, b^3, b^5, a^2b}
        
        {a, b, b^2, b^3, a^2b, b^2a(b^3)}
        
        {a, b, b^2, b^3, a^2b, b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, a^2b}
        
        {a, b, b^2, b^3, a^2b, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, a^2b}
      - {a, b, b^2, a^2b, a^2(b^2)} (8 descendants)
        
        {a, b, b^2, a(b^3), a^2b, a^2(b^2)}
        
        {a, b, b^2, a^2b, a^2(b^2), ba(b^2)}
        
        {a, b, b^2, a^2b, a^2(b^2), b^2(a^2)}
        
        {a, b, b^2, a^2b, a^2(b^2), b^2ab}
        
        {a, b, b^2, a^2b, a^2(b^2), b^3a}
        
        {a, b, b^2, b^4, a^2b, a^2(b^2)}
        
        {a, b, b^2, a^2b, a^2(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2b, a^2(b^2)}
      - {a, b, b^2, a(b^3), a^2b} (7 descendants)
        
        {a, b, b^2, a(b^3), a^2b, ba(b^2)}
        
        {a, b, b^2, a(b^3), a^2b, b^2(a^2)}
        
        {a, b, b^2, a(b^3), a^2b, b^2ab}
        
        {a, b, b^2, a(b^3), a^2b, b^3a}
        
        {a, b, b^2, b^4, a(b^3), a^2b}
        
        {a, b, b^2, a(b^3), a^2b, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^3), a^2b}
      - {a, b, b^2, a^2b, ba(b^2)} (7 descendants)
        
        {a, b, b^2, a^2b, b^2(a^2), ba(b^2)}
        
        {a, b, b^2, a^2b, ba(b^2), b^2ab}
        
        {a, b, b^2, a^2b, b^3a, ba(b^2)}
        
        {a, b, b^2, b^4, a^2b, ba(b^2)}
        
        {a, b, b^2, a^2b, ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2b, ba(b^2)}
        
        {a, b, b^2, a^2b, ba(b^2), a^2ba(b^2)}
      - {a, b, b^2, a^2b, b^2(a^2)} (6 descendants)
        
        {a, b, b^2, a^2b, b^2(a^2), b^2ab}
        
        {a, b, b^2, a^2b, b^2(a^2), b^3a}
        
        {a, b, b^2, b^4, a^2b, b^2(a^2)}
        
        {a, b, b^2, a^2b, b^2(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2b, b^2(a^2)}
        
        {a, b, b^2, a^2b, b^2(a^2), b^2(a^3)b}
      - {a, b, b^2, a^2b, b^2ab} (4 descendants)
        
        {a, b, b^2, a^2b, b^3a, b^2ab}
        
        {a, b, b^2, b^4, a^2b, b^2ab}
        
        {a, b, b^2, a^2b, b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2b, b^2ab}
      - {a, b, b^2, a^2b, b^3a} (4 descendants)
        
        {a, b, b^2, b^4, a^2b, b^3a}
        
        {a, b, b^2, a^2b, b^3a, b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2b, b^3a}
        
        {a, b, b^2, a^2b, b^3a, b^3(a^2)b}
      - {a, b, b^2, b^4, a^2b} (4 descendants)
        
        {a, b, b^2, b^4, a^2b, b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, a^2b}
        
        {a, b, b^2, b^4, a^2b, a^2(b^4)}
        
        {a, b, b^2, b^4, b^7, a^2b}
      - {a, b, b^2, a^2b, b^2a(b^2)} (1 descendant)
        
        {a, b, b^2, b^5, a^2b, b^2a(b^2)}
      - {a, b, b^2, b^5, a^2b} (0 descendants)
    - {a, b, b^2, aba} (15 descendants)
      - {a, b, b^2, a(b^2), aba} (19 descendants)
        
        {a, b, b^2, a(b^2), b(a^2), aba}
        
        {a, b, b^2, a(b^2), aba, bab}
        
        {a, b, b^2, a(b^2), b^2a, aba}
        
        {a, b, b^2, b^3, a(b^2), aba}
        
        {a, b, b^2, a(b^2), a^2(b^2), aba}
        
        {a, b, b^2, a(b^2), a(b^3), aba}
        
        {a, b, b^2, a(b^2), aba, ba(b^2)}
        
        {a, b, b^2, a(b^2), b^2(a^2), aba}
        
        {a, b, b^2, a(b^2), aba, b^2ab}
        
        {a, b, b^2, a(b^2), b^3a, aba}
        
        {a, b, b^2, b^4, a(b^2), aba}
        
        {a, b, b^2, a(b^2), a^3(b^2), aba}
        
        {a, b, b^2, a(b^2), aba, ababa}
        
        {a, b, b^2, a(b^2), aba, aba(b^2)}
        
        {a, b, b^2, a(b^2), aba, b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), aba, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), aba}
        
        {a, b, b^2, a(b^2), aba, b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), aba, b^3a(b^2)}
      - {a, b, b^2, b(a^2), aba} (14 descendants)
        
        {a, b, b^2, b(a^2), aba, bab}
        
        {a, b, b^2, b(a^2), b^2a, aba}
        
        {a, b, b^2, b^3, b(a^2), aba}
        
        {a, b, b^2, b(a^2), a^2(b^2), aba}
        
        {a, b, b^2, a(b^3), b(a^2), aba}
        
        {a, b, b^2, b(a^2), aba, ba(b^2)}
        
        {a, b, b^2, b(a^2), b^2(a^2), aba}
        
        {a, b, b^2, b(a^2), aba, b^2ab}
        
        {a, b, b^2, b(a^2), b^3a, aba}
        
        {a, b, b^2, b^4, b(a^2), aba}
        
        {a, b, b^2, b(a^2), aba, ababa}
        
        {a, b, b^2, b(a^2), aba, b(a^2)ba}
        
        {a, b, b^2, b(a^2), aba, b^2a(b^2)}
        
        {a, b, b^2, b^5, b(a^2), aba}
      - {a, b, b^2, aba, bab} (13 descendants)
        
        {a, b, b^2, b^2a, aba, bab}
        
        {a, b, b^2, b^3, aba, bab}
        
        {a, b, b^2, a^2(b^2), aba, bab}
        
        {a, b, b^2, a(b^3), aba, bab}
        
        {a, b, b^2, aba, bab, ba(b^2)}
        
        {a, b, b^2, b^2(a^2), aba, bab}
        
        {a, b, b^2, aba, bab, b^2ab}
        
        {a, b, b^2, b^3a, aba, bab}
        
        {a, b, b^2, b^4, aba, bab}
        
        {a, b, b^2, aba, bab, ababa}
        
        {a, b, b^2, aba, bab, babab}
        
        {a, b, b^2, aba, bab, b^2a(b^2)}
        
        {a, b, b^2, b^5, aba, bab}
      - {a, b, b^2, b^2a, aba} (16 descendants)
        
        {a, b, b^2, b^3, b^2a, aba}
        
        {a, b, b^2, a^2(b^2), b^2a, aba}
        
        {a, b, b^2, a(b^3), b^2a, aba}
        
        {a, b, b^2, b^2a, aba, ba(b^2)}
        
        {a, b, b^2, b^2a, b^2(a^2), aba}
        
        {a, b, b^2, b^2a, aba, b^2ab}
        
        {a, b, b^2, b^2a, b^3a, aba}
        
        {a, b, b^2, b^4, b^2a, aba}
        
        {a, b, b^2, b^2a, aba, ababa}
        
        {a, b, b^2, b^2a, b^2(a^3), aba}
        
        {a, b, b^2, b^2a, aba, b^2(a^2)b}
        
        {a, b, b^2, b^2a, aba, b^2aba}
        
        {a, b, b^2, b^2a, aba, b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2a, aba}
        
        {a, b, b^2, b^2a, aba, b^2(a^2)(b^2)}
        
        {a, b, b^2, b^2a, aba, b^2a(b^3)}
      - {a, b, b^2, b^3, aba} (21 descendants)
        
        {a, b, b^2, b^3, a^2(b^2), aba}
        
        {a, b, b^2, b^3, a(b^3), aba}
        
        {a, b, b^2, b^3, aba, ba(b^2)}
        
        {a, b, b^2, b^3, b^2(a^2), aba}
        
        {a, b, b^2, b^3, aba, b^2ab}
        
        {a, b, b^2, b^3, b^3a, aba}
        
        {a, b, b^2, b^3, b^4, aba}
        
        {a, b, b^2, b^3, a^2(b^3), aba}
        
        {a, b, b^2, b^3, aba, ababa}
        
        {a, b, b^2, b^3, a(b^4), aba}
        
        {a, b, b^2, b^3, aba, ba(b^3)}
        
        {a, b, b^2, b^3, aba, b^2a(b^2)}
        
        {a, b, b^2, b^3, b^3(a^2), aba}
        
        {a, b, b^2, b^3, aba, b^3ab}
        
        {a, b, b^2, b^3, b^4a, aba}
        
        {a, b, b^2, b^3, b^5, aba}
        
        {a, b, b^2, b^3, aba, b^2a(b^3)}
        
        {a, b, b^2, b^3, aba, b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, aba}
        
        {a, b, b^2, b^3, aba, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, aba}
      - {a, b, b^2, a^2(b^2), aba} (10 descendants)
        
        {a, b, b^2, a(b^3), a^2(b^2), aba}
        
        {a, b, b^2, a^2(b^2), aba, ba(b^2)}
        
        {a, b, b^2, a^2(b^2), b^2(a^2), aba}
        
        {a, b, b^2, a^2(b^2), aba, b^2ab}
        
        {a, b, b^2, a^2(b^2), b^3a, aba}
        
        {a, b, b^2, b^4, a^2(b^2), aba}
        
        {a, b, b^2, a^2(b^2), aba, ababa}
        
        {a, b, b^2, a^2(b^2), aba, b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2(b^2), aba}
        
        {a, b, b^2, a^2(b^2), aba, ab(a^2)(b^2)}
      - {a, b, b^2, a(b^3), aba} (9 descendants)
        
        {a, b, b^2, a(b^3), aba, ba(b^2)}
        
        {a, b, b^2, a(b^3), b^2(a^2), aba}
        
        {a, b, b^2, a(b^3), aba, b^2ab}
        
        {a, b, b^2, a(b^3), b^3a, aba}
        
        {a, b, b^2, b^4, a(b^3), aba}
        
        {a, b, b^2, a(b^3), aba, ababa}
        
        {a, b, b^2, a(b^3), aba, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^3), aba}
        
        {a, b, b^2, a(b^3), aba, aba(b^3)}
      - {a, b, b^2, aba, ba(b^2)} (7 descendants)
        
        {a, b, b^2, b^2(a^2), aba, ba(b^2)}
        
        {a, b, b^2, aba, ba(b^2), b^2ab}
        
        {a, b, b^2, b^3a, aba, ba(b^2)}
        
        {a, b, b^2, b^4, aba, ba(b^2)}
        
        {a, b, b^2, aba, ba(b^2), ababa}
        
        {a, b, b^2, aba, ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, aba, ba(b^2)}
      - {a, b, b^2, b^2(a^2), aba} (7 descendants)
        
        {a, b, b^2, b^2(a^2), aba, b^2ab}
        
        {a, b, b^2, b^2(a^2), b^3a, aba}
        
        {a, b, b^2, b^4, b^2(a^2), aba}
        
        {a, b, b^2, b^2(a^2), aba, ababa}
        
        {a, b, b^2, b^2(a^2), aba, b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2(a^2), aba}
        
        {a, b, b^2, b^2(a^2), aba, b^2(a^2)ba}
      - {a, b, b^2, aba, b^2ab} (5 descendants)
        
        {a, b, b^2, b^3a, aba, b^2ab}
        
        {a, b, b^2, b^4, aba, b^2ab}
        
        {a, b, b^2, aba, b^2ab, ababa}
        
        {a, b, b^2, aba, b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^5, aba, b^2ab}
      - {a, b, b^2, b^3a, aba} (5 descendants)
        
        {a, b, b^2, b^4, b^3a, aba}
        
        {a, b, b^2, b^3a, aba, ababa}
        
        {a, b, b^2, b^3a, aba, b^2a(b^2)}
        
        {a, b, b^2, b^5, b^3a, aba}
        
        {a, b, b^2, b^3a, aba, b^3aba}
      - {a, b, b^2, b^4, aba} (4 descendants)
        
        {a, b, b^2, b^4, aba, ababa}
        
        {a, b, b^2, b^4, aba, b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, aba}
        
        {a, b, b^2, b^4, b^7, aba}
      - {a, b, b^2, aba, ababa} (3 descendants)
        
        {a, b, b^2, aba, b^2a(b^2), ababa}
        
        {a, b, b^2, b^5, aba, ababa}
        
        {a, b, b^2, aba, ababa, abababa}
      - {a, b, b^2, aba, b^2a(b^2)} (1 descendant)
        
        {a, b, b^2, b^5, aba, b^2a(b^2)}
      - {a, b, b^2, b^5, aba} (0 descendants)
    - {a, b, b^2, a(b^2)} (18 descendants)
      - {a, b, b^2, a(b^2), b(a^2)} (18 descendants)
        
        {a, b, b^2, a(b^2), b(a^2), bab}
        
        {a, b, b^2, a(b^2), b(a^2), b^2a}
        
        {a, b, b^2, b^3, a(b^2), b(a^2)}
        
        {a, b, b^2, a(b^2), b(a^2), a^2(b^2)}
        
        {a, b, b^2, a(b^2), a(b^3), b(a^2)}
        
        {a, b, b^2, a(b^2), b(a^2), ba(b^2)}
        
        {a, b, b^2, a(b^2), b(a^2), b^2(a^2)}
        
        {a, b, b^2, a(b^2), b(a^2), b^2ab}
        
        {a, b, b^2, a(b^2), b(a^2), b^3a}
        
        {a, b, b^2, b^4, a(b^2), b(a^2)}
        
        {a, b, b^2, a(b^2), b(a^2), a^3(b^2)}
        
        {a, b, b^2, a(b^2), b(a^2), aba(b^2)}
        
        {a, b, b^2, a(b^2), b(a^2), a(b^2)(a^2)}
        
        {a, b, b^2, a(b^2), b(a^2), b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), b(a^2)}
        
        {a, b, b^2, a(b^2), b(a^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b(a^2), b^3a(b^2)}
      - {a, b, b^2, a(b^2), bab} (18 descendants)
        
        {a, b, b^2, a(b^2), b^2a, bab}
        
        {a, b, b^2, b^3, a(b^2), bab}
        
        {a, b, b^2, a(b^2), a^2(b^2), bab}
        
        {a, b, b^2, a(b^2), a(b^3), bab}
        
        {a, b, b^2, a(b^2), bab, ba(b^2)}
        
        {a, b, b^2, a(b^2), b^2(a^2), bab}
        
        {a, b, b^2, a(b^2), bab, b^2ab}
        
        {a, b, b^2, a(b^2), b^3a, bab}
        
        {a, b, b^2, b^4, a(b^2), bab}
        
        {a, b, b^2, a(b^2), a^3(b^2), bab}
        
        {a, b, b^2, a(b^2), bab, aba(b^2)}
        
        {a, b, b^2, a(b^2), bab, a(b^2)ab}
        
        {a, b, b^2, a(b^2), bab, b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), bab, babab}
        
        {a, b, b^2, a(b^2), bab, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), bab}
        
        {a, b, b^2, a(b^2), bab, b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), bab, b^3a(b^2)}
      - {a, b, b^2, a(b^2), b^2a} (22 descendants)
        
        {a, b, b^2, b^3, a(b^2), b^2a}
        
        {a, b, b^2, a(b^2), a^2(b^2), b^2a}
        
        {a, b, b^2, a(b^2), a(b^3), b^2a}
        
        {a, b, b^2, a(b^2), b^2a, ba(b^2)}
        
        {a, b, b^2, a(b^2), b^2a, b^2(a^2)}
        
        {a, b, b^2, a(b^2), b^2a, b^2ab}
        
        {a, b, b^2, a(b^2), b^2a, b^3a}
        
        {a, b, b^2, b^4, a(b^2), b^2a}
        
        {a, b, b^2, a(b^2), a^3(b^2), b^2a}
        
        {a, b, b^2, a(b^2), b^2a, aba(b^2)}
        
        {a, b, b^2, a(b^2), b^2a, a(b^3)a}
        
        {a, b, b^2, a(b^2), b^2a, b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b^2a, b^2(a^3)}
        
        {a, b, b^2, a(b^2), b^2a, b^2(a^2)b}
        
        {a, b, b^2, a(b^2), b^2a, b^2aba}
        
        {a, b, b^2, a(b^2), b^2a, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), b^2a}
        
        {a, b, b^2, a(b^2), b^2a, b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b^2a, b^2a(b^3)}
        
        {a, b, b^2, a(b^2), b^2a, b^3a(b^2)}
        
        {a, b, b^2, a(b^2), b^2a, b^2(a^3)(b^2)}
        
        {a, b, b^2, a(b^2), b^2a, b^2aba(b^2)}
      - {a, b, b^2, b^3, a(b^2)} (26 descendants)
        
        {a, b, b^2, b^3, a(b^2), a^2(b^2)}
        
        {a, b, b^2, b^3, a(b^2), a(b^3)}
        
        {a, b, b^2, b^3, a(b^2), ba(b^2)}
        
        {a, b, b^2, b^3, a(b^2), b^2(a^2)}
        
        {a, b, b^2, b^3, a(b^2), b^2ab}
        
        {a, b, b^2, b^3, a(b^2), b^3a}
        
        {a, b, b^2, b^3, b^4, a(b^2)}
        
        {a, b, b^2, b^3, a(b^2), a^3(b^2)}
        
        {a, b, b^2, b^3, a(b^2), a^2(b^3)}
        
        {a, b, b^2, b^3, a(b^2), aba(b^2)}
        
        {a, b, b^2, b^3, a(b^2), a(b^4)}
        
        {a, b, b^2, b^3, a(b^2), b(a^2)(b^2)}
        
        {a, b, b^2, b^3, a(b^2), ba(b^3)}
        
        {a, b, b^2, b^3, a(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^3, a(b^2), b^3(a^2)}
        
        {a, b, b^2, b^3, a(b^2), b^3ab}
        
        {a, b, b^2, b^3, a(b^2), b^4a}
        
        {a, b, b^2, b^3, b^5, a(b^2)}
        
        {a, b, b^2, b^3, a(b^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, b^3, a(b^2), b^2a(b^3)}
        
        {a, b, b^2, b^3, a(b^2), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, a(b^2)}
        
        {a, b, b^2, b^3, a(b^2), b^3(a^2)(b^2)}
        
        {a, b, b^2, b^3, a(b^2), b^3a(b^3)}
        
        {a, b, b^2, b^3, a(b^2), b^4a(b^2)}
        
        {a, b, b^2, b^3, b^7, a(b^2)}
      - {a, b, b^2, a(b^2), a^2(b^2)} (18 descendants)
        
        {a, b, b^2, a(b^2), a(b^3), a^2(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), ba(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), b^2(a^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), b^2ab}
        
        {a, b, b^2, a(b^2), a^2(b^2), b^3a}
        
        {a, b, b^2, b^4, a(b^2), a^2(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), a^3(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), aba(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), a^2(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), a^4(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), ab(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), b(a^3)(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), b^3a(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), b^2(a^3)(b^2)}
        
        {a, b, b^2, a(b^2), a^2(b^2), b^3(a^2)(b^2)}
      - {a, b, b^2, a(b^2), a(b^3)} (12 descendants)
        
        {a, b, b^2, a(b^2), a(b^3), ba(b^2)}
        
        {a, b, b^2, a(b^2), a(b^3), b^2(a^2)}
        
        {a, b, b^2, a(b^2), a(b^3), b^2ab}
        
        {a, b, b^2, a(b^2), a(b^3), b^3a}
        
        {a, b, b^2, b^4, a(b^2), a(b^3)}
        
        {a, b, b^2, a(b^2), a(b^3), a^3(b^2)}
        
        {a, b, b^2, a(b^2), a(b^3), aba(b^2)}
        
        {a, b, b^2, a(b^2), a(b^3), b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), a(b^3), b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), a(b^3)}
        
        {a, b, b^2, a(b^2), a(b^3), b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), a(b^3), b^3a(b^2)}
      - {a, b, b^2, a(b^2), ba(b^2)} (16 descendants)
        
        {a, b, b^2, a(b^2), b^2(a^2), ba(b^2)}
        
        {a, b, b^2, a(b^2), ba(b^2), b^2ab}
        
        {a, b, b^2, a(b^2), b^3a, ba(b^2)}
        
        {a, b, b^2, b^4, a(b^2), ba(b^2)}
        
        {a, b, b^2, a(b^2), a^3(b^2), ba(b^2)}
        
        {a, b, b^2, a(b^2), ba(b^2), aba(b^2)}
        
        {a, b, b^2, a(b^2), ba(b^2), b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), ba(b^2)}
        
        {a, b, b^2, a(b^2), ba(b^2), a^2ba(b^2)}
        
        {a, b, b^2, a(b^2), ba(b^2), a(b^2)a(b^2)}
        
        {a, b, b^2, a(b^2), ba(b^2), baba(b^2)}
        
        {a, b, b^2, a(b^2), ba(b^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), ba(b^2), b^3a(b^2)}
        
        {a, b, b^2, a(b^2), ba(b^2), b^2aba(b^2)}
        
        {a, b, b^2, a(b^2), ba(b^2), b^4a(b^2)}
      - {a, b, b^2, a(b^2), b^2(a^2)} (10 descendants)
        
        {a, b, b^2, a(b^2), b^2(a^2), b^2ab}
        
        {a, b, b^2, a(b^2), b^2(a^2), b^3a}
        
        {a, b, b^2, b^4, a(b^2), b^2(a^2)}
        
        {a, b, b^2, a(b^2), a^3(b^2), b^2(a^2)}
        
        {a, b, b^2, a(b^2), b^2(a^2), aba(b^2)}
        
        {a, b, b^2, a(b^2), b^2(a^2), b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b^2(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), b^2(a^2)}
        
        {a, b, b^2, a(b^2), b^2(a^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b^2(a^2), b^3a(b^2)}
      - {a, b, b^2, a(b^2), b^2ab} (9 descendants)
        
        {a, b, b^2, a(b^2), b^3a, b^2ab}
        
        {a, b, b^2, b^4, a(b^2), b^2ab}
        
        {a, b, b^2, a(b^2), a^3(b^2), b^2ab}
        
        {a, b, b^2, a(b^2), b^2ab, aba(b^2)}
        
        {a, b, b^2, a(b^2), b(a^2)(b^2), b^2ab}
        
        {a, b, b^2, a(b^2), b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), b^2ab}
        
        {a, b, b^2, a(b^2), b^2ab, b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b^2ab, b^3a(b^2)}
      - {a, b, b^2, a(b^2), b^3a} (8 descendants)
        
        {a, b, b^2, b^4, a(b^2), b^3a}
        
        {a, b, b^2, a(b^2), a^3(b^2), b^3a}
        
        {a, b, b^2, a(b^2), b^3a, aba(b^2)}
        
        {a, b, b^2, a(b^2), b^3a, b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b^3a, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), b^3a}
        
        {a, b, b^2, a(b^2), b^3a, b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b^3a, b^3a(b^2)}
      - {a, b, b^2, b^4, a(b^2)} (9 descendants)
        
        {a, b, b^2, b^4, a(b^2), a^3(b^2)}
        
        {a, b, b^2, b^4, a(b^2), aba(b^2)}
        
        {a, b, b^2, b^4, a(b^2), b(a^2)(b^2)}
        
        {a, b, b^2, b^4, a(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, a(b^2)}
        
        {a, b, b^2, b^4, a(b^2), a(b^5)}
        
        {a, b, b^2, b^4, a(b^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, b^4, a(b^2), b^3a(b^2)}
        
        {a, b, b^2, b^4, b^7, a(b^2)}
      - {a, b, b^2, a(b^2), a^3(b^2)} (6 descendants)
        
        {a, b, b^2, a(b^2), a^3(b^2), aba(b^2)}
        
        {a, b, b^2, a(b^2), a^3(b^2), b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), a^3(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), a^3(b^2)}
        
        {a, b, b^2, a(b^2), a^3(b^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), a^3(b^2), b^3a(b^2)}
      - {a, b, b^2, a(b^2), aba(b^2)} (5 descendants)
        
        {a, b, b^2, a(b^2), b(a^2)(b^2), aba(b^2)}
        
        {a, b, b^2, a(b^2), b^2a(b^2), aba(b^2)}
        
        {a, b, b^2, b^5, a(b^2), aba(b^2)}
        
        {a, b, b^2, a(b^2), b^2(a^2)(b^2), aba(b^2)}
        
        {a, b, b^2, a(b^2), b^3a(b^2), aba(b^2)}
      - {a, b, b^2, a(b^2), b(a^2)(b^2)} (5 descendants)
        
        {a, b, b^2, a(b^2), b(a^2)(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^2), b(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b(a^2)(b^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b(a^2)(b^2), b^3a(b^2)}
        
        {a, b, b^2, a(b^2), b(a^2)(b^2), a(b^2)(a^2)(b^2)}
      - {a, b, b^2, a(b^2), b^2a(b^2)} (4 descendants)
        
        {a, b, b^2, b^5, a(b^2), b^2a(b^2)}
        
        {a, b, b^2, a(b^2), b^2a(b^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^2), b^2a(b^2), b^3a(b^2)}
        
        {a, b, b^2, a(b^2), b^2a(b^2), a(b^3)a(b^2)}
      - {a, b, b^2, b^5, a(b^2)} (2 descendants)
        
        {a, b, b^2, b^5, a(b^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, b^5, a(b^2), b^3a(b^2)}
      - {a, b, b^2, a(b^2), b^2(a^2)(b^2)} (1 descendant)
        
        {a, b, b^2, a(b^2), b^2(a^2)(b^2), b^3a(b^2)}
      - {a, b, b^2, a(b^2), b^3a(b^2)} (0 descendants)
    - {a, b, b^2, b(a^2)} (12 descendants)
      - {a, b, b^2, b(a^2), bab} (13 descendants)
        
        {a, b, b^2, b(a^2), b^2a, bab}
        
        {a, b, b^2, b^3, b(a^2), bab}
        
        {a, b, b^2, b(a^2), a^2(b^2), bab}
        
        {a, b, b^2, a(b^3), b(a^2), bab}
        
        {a, b, b^2, b(a^2), bab, ba(b^2)}
        
        {a, b, b^2, b(a^2), b^2(a^2), bab}
        
        {a, b, b^2, b(a^2), bab, b^2ab}
        
        {a, b, b^2, b(a^2), b^3a, bab}
        
        {a, b, b^2, b^4, b(a^2), bab}
        
        {a, b, b^2, b(a^2), bab, bab(a^2)}
        
        {a, b, b^2, b(a^2), bab, babab}
        
        {a, b, b^2, b(a^2), bab, b^2a(b^2)}
        
        {a, b, b^2, b^5, b(a^2), bab}
      - {a, b, b^2, b(a^2), b^2a} (15 descendants)
        
        {a, b, b^2, b^3, b(a^2), b^2a}
        
        {a, b, b^2, b(a^2), a^2(b^2), b^2a}
        
        {a, b, b^2, a(b^3), b(a^2), b^2a}
        
        {a, b, b^2, b(a^2), b^2a, ba(b^2)}
        
        {a, b, b^2, b(a^2), b^2a, b^2(a^2)}
        
        {a, b, b^2, b(a^2), b^2a, b^2ab}
        
        {a, b, b^2, b(a^2), b^2a, b^3a}
        
        {a, b, b^2, b^4, b(a^2), b^2a}
        
        {a, b, b^2, b(a^2), b^2a, b^2(a^3)}
        
        {a, b, b^2, b(a^2), b^2a, b^2(a^2)b}
        
        {a, b, b^2, b(a^2), b^2a, b^2aba}
        
        {a, b, b^2, b(a^2), b^2a, b^2a(b^2)}
        
        {a, b, b^2, b^5, b(a^2), b^2a}
        
        {a, b, b^2, b(a^2), b^2a, b^2(a^2)(b^2)}
        
        {a, b, b^2, b(a^2), b^2a, b^2a(b^3)}
      - {a, b, b^2, b^3, b(a^2)} (20 descendants)
        
        {a, b, b^2, b^3, b(a^2), a^2(b^2)}
        
        {a, b, b^2, b^3, a(b^3), b(a^2)}
        
        {a, b, b^2, b^3, b(a^2), ba(b^2)}
        
        {a, b, b^2, b^3, b(a^2), b^2(a^2)}
        
        {a, b, b^2, b^3, b(a^2), b^2ab}
        
        {a, b, b^2, b^3, b(a^2), b^3a}
        
        {a, b, b^2, b^3, b^4, b(a^2)}
        
        {a, b, b^2, b^3, b(a^2), a^2(b^3)}
        
        {a, b, b^2, b^3, a(b^4), b(a^2)}
        
        {a, b, b^2, b^3, b(a^2), ba(b^3)}
        
        {a, b, b^2, b^3, b(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^3, b(a^2), b^3(a^2)}
        
        {a, b, b^2, b^3, b(a^2), b^3ab}
        
        {a, b, b^2, b^3, b(a^2), b^4a}
        
        {a, b, b^2, b^3, b^5, b(a^2)}
        
        {a, b, b^2, b^3, b(a^2), b^2a(b^3)}
        
        {a, b, b^2, b^3, b(a^2), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, b(a^2)}
        
        {a, b, b^2, b^3, b(a^2), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, b(a^2)}
      - {a, b, b^2, b(a^2), a^2(b^2)} (9 descendants)
        
        {a, b, b^2, a(b^3), b(a^2), a^2(b^2)}
        
        {a, b, b^2, b(a^2), a^2(b^2), ba(b^2)}
        
        {a, b, b^2, b(a^2), a^2(b^2), b^2(a^2)}
        
        {a, b, b^2, b(a^2), a^2(b^2), b^2ab}
        
        {a, b, b^2, b(a^2), a^2(b^2), b^3a}
        
        {a, b, b^2, b^4, b(a^2), a^2(b^2)}
        
        {a, b, b^2, b(a^2), a^2(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, b(a^2), a^2(b^2)}
        
        {a, b, b^2, b(a^2), a^2(b^2), b(a^3)(b^2)}
      - {a, b, b^2, a(b^3), b(a^2)} (8 descendants)
        
        {a, b, b^2, a(b^3), b(a^2), ba(b^2)}
        
        {a, b, b^2, a(b^3), b(a^2), b^2(a^2)}
        
        {a, b, b^2, a(b^3), b(a^2), b^2ab}
        
        {a, b, b^2, a(b^3), b(a^2), b^3a}
        
        {a, b, b^2, b^4, a(b^3), b(a^2)}
        
        {a, b, b^2, a(b^3), b(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^3), b(a^2)}
        
        {a, b, b^2, a(b^3), b(a^2), b(a^2)(b^3)}
      - {a, b, b^2, b(a^2), ba(b^2)} (6 descendants)
        
        {a, b, b^2, b(a^2), b^2(a^2), ba(b^2)}
        
        {a, b, b^2, b(a^2), ba(b^2), b^2ab}
        
        {a, b, b^2, b(a^2), b^3a, ba(b^2)}
        
        {a, b, b^2, b^4, b(a^2), ba(b^2)}
        
        {a, b, b^2, b(a^2), ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, b(a^2), ba(b^2)}
      - {a, b, b^2, b(a^2), b^2(a^2)} (5 descendants)
        
        {a, b, b^2, b(a^2), b^2(a^2), b^2ab}
        
        {a, b, b^2, b(a^2), b^2(a^2), b^3a}
        
        {a, b, b^2, b^4, b(a^2), b^2(a^2)}
        
        {a, b, b^2, b(a^2), b^2(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, b(a^2), b^2(a^2)}
      - {a, b, b^2, b(a^2), b^2ab} (5 descendants)
        
        {a, b, b^2, b(a^2), b^3a, b^2ab}
        
        {a, b, b^2, b^4, b(a^2), b^2ab}
        
        {a, b, b^2, b(a^2), b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^5, b(a^2), b^2ab}
        
        {a, b, b^2, b(a^2), b^2ab, b^2ab(a^2)}
      - {a, b, b^2, b(a^2), b^3a} (3 descendants)
        
        {a, b, b^2, b^4, b(a^2), b^3a}
        
        {a, b, b^2, b(a^2), b^3a, b^2a(b^2)}
        
        {a, b, b^2, b^5, b(a^2), b^3a}
      - {a, b, b^2, b^4, b(a^2)} (4 descendants)
        
        {a, b, b^2, b^4, b(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, b(a^2)}
        
        {a, b, b^2, b^4, b(a^2), b^4(a^2)}
        
        {a, b, b^2, b^4, b^7, b(a^2)}
      - {a, b, b^2, b(a^2), b^2a(b^2)} (1 descendant)
        
        {a, b, b^2, b^5, b(a^2), b^2a(b^2)}
      - {a, b, b^2, b^5, b(a^2)} (0 descendants)
    - {a, b, b^2, bab} (12 descendants)
      - {a, b, b^2, b^2a, bab} (17 descendants)
        
        {a, b, b^2, b^3, b^2a, bab}
        
        {a, b, b^2, a^2(b^2), b^2a, bab}
        
        {a, b, b^2, a(b^3), b^2a, bab}
        
        {a, b, b^2, b^2a, bab, ba(b^2)}
        
        {a, b, b^2, b^2a, b^2(a^2), bab}
        
        {a, b, b^2, b^2a, bab, b^2ab}
        
        {a, b, b^2, b^2a, b^3a, bab}
        
        {a, b, b^2, b^4, b^2a, bab}
        
        {a, b, b^2, b^2a, bab, babab}
        
        {a, b, b^2, b^2a, bab, ba(b^2)a}
        
        {a, b, b^2, b^2a, b^2(a^3), bab}
        
        {a, b, b^2, b^2a, bab, b^2(a^2)b}
        
        {a, b, b^2, b^2a, bab, b^2aba}
        
        {a, b, b^2, b^2a, bab, b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2a, bab}
        
        {a, b, b^2, b^2a, bab, b^2(a^2)(b^2)}
        
        {a, b, b^2, b^2a, bab, b^2a(b^3)}
      - {a, b, b^2, b^3, bab} (21 descendants)
        
        {a, b, b^2, b^3, a^2(b^2), bab}
        
        {a, b, b^2, b^3, a(b^3), bab}
        
        {a, b, b^2, b^3, bab, ba(b^2)}
        
        {a, b, b^2, b^3, b^2(a^2), bab}
        
        {a, b, b^2, b^3, bab, b^2ab}
        
        {a, b, b^2, b^3, b^3a, bab}
        
        {a, b, b^2, b^3, b^4, bab}
        
        {a, b, b^2, b^3, a^2(b^3), bab}
        
        {a, b, b^2, b^3, a(b^4), bab}
        
        {a, b, b^2, b^3, bab, babab}
        
        {a, b, b^2, b^3, bab, ba(b^3)}
        
        {a, b, b^2, b^3, bab, b^2a(b^2)}
        
        {a, b, b^2, b^3, b^3(a^2), bab}
        
        {a, b, b^2, b^3, bab, b^3ab}
        
        {a, b, b^2, b^3, b^4a, bab}
        
        {a, b, b^2, b^3, b^5, bab}
        
        {a, b, b^2, b^3, bab, b^2a(b^3)}
        
        {a, b, b^2, b^3, bab, b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, bab}
        
        {a, b, b^2, b^3, bab, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, bab}
      - {a, b, b^2, a^2(b^2), bab} (9 descendants)
        
        {a, b, b^2, a(b^3), a^2(b^2), bab}
        
        {a, b, b^2, a^2(b^2), bab, ba(b^2)}
        
        {a, b, b^2, a^2(b^2), b^2(a^2), bab}
        
        {a, b, b^2, a^2(b^2), bab, b^2ab}
        
        {a, b, b^2, a^2(b^2), b^3a, bab}
        
        {a, b, b^2, b^4, a^2(b^2), bab}
        
        {a, b, b^2, a^2(b^2), bab, babab}
        
        {a, b, b^2, a^2(b^2), bab, b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2(b^2), bab}
      - {a, b, b^2, a(b^3), bab} (8 descendants)
        
        {a, b, b^2, a(b^3), bab, ba(b^2)}
        
        {a, b, b^2, a(b^3), b^2(a^2), bab}
        
        {a, b, b^2, a(b^3), bab, b^2ab}
        
        {a, b, b^2, a(b^3), b^3a, bab}
        
        {a, b, b^2, b^4, a(b^3), bab}
        
        {a, b, b^2, a(b^3), bab, babab}
        
        {a, b, b^2, a(b^3), bab, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^3), bab}
      - {a, b, b^2, bab, ba(b^2)} (8 descendants)
        
        {a, b, b^2, b^2(a^2), bab, ba(b^2)}
        
        {a, b, b^2, bab, ba(b^2), b^2ab}
        
        {a, b, b^2, b^3a, bab, ba(b^2)}
        
        {a, b, b^2, b^4, bab, ba(b^2)}
        
        {a, b, b^2, bab, ba(b^2), babab}
        
        {a, b, b^2, bab, ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, bab, ba(b^2)}
        
        {a, b, b^2, bab, ba(b^2), baba(b^2)}
      - {a, b, b^2, b^2(a^2), bab} (6 descendants)
        
        {a, b, b^2, b^2(a^2), bab, b^2ab}
        
        {a, b, b^2, b^2(a^2), b^3a, bab}
        
        {a, b, b^2, b^4, b^2(a^2), bab}
        
        {a, b, b^2, b^2(a^2), bab, babab}
        
        {a, b, b^2, b^2(a^2), bab, b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2(a^2), bab}
      - {a, b, b^2, bab, b^2ab} (6 descendants)
        
        {a, b, b^2, b^3a, bab, b^2ab}
        
        {a, b, b^2, b^4, bab, b^2ab}
        
        {a, b, b^2, bab, b^2ab, babab}
        
        {a, b, b^2, bab, b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^5, bab, b^2ab}
        
        {a, b, b^2, bab, b^2ab, b^2abab}
      - {a, b, b^2, b^3a, bab} (4 descendants)
        
        {a, b, b^2, b^4, b^3a, bab}
        
        {a, b, b^2, b^3a, bab, babab}
        
        {a, b, b^2, b^3a, bab, b^2a(b^2)}
        
        {a, b, b^2, b^5, b^3a, bab}
      - {a, b, b^2, b^4, bab} (6 descendants)
        
        {a, b, b^2, b^4, bab, babab}
        
        {a, b, b^2, b^4, bab, b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, bab}
        
        {a, b, b^2, b^4, bab, ba(b^4)}
        
        {a, b, b^2, b^4, bab, b^4ab}
        
        {a, b, b^2, b^4, b^7, bab}
      - {a, b, b^2, bab, babab} (3 descendants)
        
        {a, b, b^2, bab, b^2a(b^2), babab}
        
        {a, b, b^2, b^5, bab, babab}
        
        {a, b, b^2, bab, babab, bababab}
      - {a, b, b^2, bab, b^2a(b^2)} (1 descendant)
        
        {a, b, b^2, b^5, bab, b^2a(b^2)}
      - {a, b, b^2, b^5, bab} (0 descendants)
    - {a, b, b^2, b^2a} (15 descendants)
      - {a, b, b^2, b^3, b^2a} (26 descendants)
        
        {a, b, b^2, b^3, a^2(b^2), b^2a}
        
        {a, b, b^2, b^3, a(b^3), b^2a}
        
        {a, b, b^2, b^3, b^2a, ba(b^2)}
        
        {a, b, b^2, b^3, b^2a, b^2(a^2)}
        
        {a, b, b^2, b^3, b^2a, b^2ab}
        
        {a, b, b^2, b^3, b^2a, b^3a}
        
        {a, b, b^2, b^3, b^4, b^2a}
        
        {a, b, b^2, b^3, a^2(b^3), b^2a}
        
        {a, b, b^2, b^3, a(b^4), b^2a}
        
        {a, b, b^2, b^3, b^2a, ba(b^3)}
        
        {a, b, b^2, b^3, b^2a, b^2(a^3)}
        
        {a, b, b^2, b^3, b^2a, b^2(a^2)b}
        
        {a, b, b^2, b^3, b^2a, b^2aba}
        
        {a, b, b^2, b^3, b^2a, b^2a(b^2)}
        
        {a, b, b^2, b^3, b^2a, b^3(a^2)}
        
        {a, b, b^2, b^3, b^2a, b^3ab}
        
        {a, b, b^2, b^3, b^2a, b^4a}
        
        {a, b, b^2, b^3, b^5, b^2a}
        
        {a, b, b^2, b^3, b^2a, b^2(a^2)(b^2)}
        
        {a, b, b^2, b^3, b^2a, b^2a(b^3)}
        
        {a, b, b^2, b^3, b^2a, b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, b^2a}
        
        {a, b, b^2, b^3, b^2a, b^2(a^2)(b^3)}
        
        {a, b, b^2, b^3, b^2a, b^2a(b^4)}
        
        {a, b, b^2, b^3, b^2a, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, b^2a}
      - {a, b, b^2, a^2(b^2), b^2a} (13 descendants)
        
        {a, b, b^2, a(b^3), a^2(b^2), b^2a}
        
        {a, b, b^2, a^2(b^2), b^2a, ba(b^2)}
        
        {a, b, b^2, a^2(b^2), b^2a, b^2(a^2)}
        
        {a, b, b^2, a^2(b^2), b^2a, b^2ab}
        
        {a, b, b^2, a^2(b^2), b^2a, b^3a}
        
        {a, b, b^2, b^4, a^2(b^2), b^2a}
        
        {a, b, b^2, a^2(b^2), b^2a, b^2(a^3)}
        
        {a, b, b^2, a^2(b^2), b^2a, b^2(a^2)b}
        
        {a, b, b^2, a^2(b^2), b^2a, b^2aba}
        
        {a, b, b^2, a^2(b^2), b^2a, b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2(b^2), b^2a}
        
        {a, b, b^2, a^2(b^2), b^2a, b^2(a^2)(b^2)}
        
        {a, b, b^2, a^2(b^2), b^2a, b^2a(b^3)}
      - {a, b, b^2, a(b^3), b^2a} (12 descendants)
        
        {a, b, b^2, a(b^3), b^2a, ba(b^2)}
        
        {a, b, b^2, a(b^3), b^2a, b^2(a^2)}
        
        {a, b, b^2, a(b^3), b^2a, b^2ab}
        
        {a, b, b^2, a(b^3), b^2a, b^3a}
        
        {a, b, b^2, b^4, a(b^3), b^2a}
        
        {a, b, b^2, a(b^3), b^2a, b^2(a^3)}
        
        {a, b, b^2, a(b^3), b^2a, b^2(a^2)b}
        
        {a, b, b^2, a(b^3), b^2a, b^2aba}
        
        {a, b, b^2, a(b^3), b^2a, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^3), b^2a}
        
        {a, b, b^2, a(b^3), b^2a, b^2(a^2)(b^2)}
        
        {a, b, b^2, a(b^3), b^2a, b^2a(b^3)}
      - {a, b, b^2, b^2a, ba(b^2)} (11 descendants)
        
        {a, b, b^2, b^2a, b^2(a^2), ba(b^2)}
        
        {a, b, b^2, b^2a, ba(b^2), b^2ab}
        
        {a, b, b^2, b^2a, b^3a, ba(b^2)}
        
        {a, b, b^2, b^4, b^2a, ba(b^2)}
        
        {a, b, b^2, b^2a, b^2(a^3), ba(b^2)}
        
        {a, b, b^2, b^2a, ba(b^2), b^2(a^2)b}
        
        {a, b, b^2, b^2a, ba(b^2), b^2aba}
        
        {a, b, b^2, b^2a, ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2a, ba(b^2)}
        
        {a, b, b^2, b^2a, ba(b^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, b^2a, ba(b^2), b^2a(b^3)}
      - {a, b, b^2, b^2a, b^2(a^2)} (15 descendants)
        
        {a, b, b^2, b^2a, b^2(a^2), b^2ab}
        
        {a, b, b^2, b^2a, b^2(a^2), b^3a}
        
        {a, b, b^2, b^4, b^2a, b^2(a^2)}
        
        {a, b, b^2, b^2a, b^2(a^2), b^2(a^3)}
        
        {a, b, b^2, b^2a, b^2(a^2), b^2(a^2)b}
        
        {a, b, b^2, b^2a, b^2(a^2), b^2aba}
        
        {a, b, b^2, b^2a, b^2(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2a, b^2(a^2)}
        
        {a, b, b^2, b^2a, b^2(a^2), b^2(a^4)}
        
        {a, b, b^2, b^2a, b^2(a^2), b^2(a^3)b}
        
        {a, b, b^2, b^2a, b^2(a^2), b^2(a^2)ba}
        
        {a, b, b^2, b^2a, b^2(a^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, b^2a, b^2(a^2), b^2a(b^3)}
        
        {a, b, b^2, b^2a, b^2(a^2), b^2(a^3)(b^2)}
        
        {a, b, b^2, b^2a, b^2(a^2), b^2(a^2)(b^3)}
      - {a, b, b^2, b^2a, b^2ab} (14 descendants)
        
        {a, b, b^2, b^2a, b^3a, b^2ab}
        
        {a, b, b^2, b^4, b^2a, b^2ab}
        
        {a, b, b^2, b^2a, b^2(a^3), b^2ab}
        
        {a, b, b^2, b^2a, b^2ab, b^2(a^2)b}
        
        {a, b, b^2, b^2a, b^2ab, b^2aba}
        
        {a, b, b^2, b^2a, b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2a, b^2ab}
        
        {a, b, b^2, b^2a, b^2ab, b^2(a^2)(b^2)}
        
        {a, b, b^2, b^2a, b^2ab, b^2ab(a^2)}
        
        {a, b, b^2, b^2a, b^2ab, b^2abab}
        
        {a, b, b^2, b^2a, b^2ab, b^2a(b^2)a}
        
        {a, b, b^2, b^2a, b^2ab, b^2a(b^3)}
        
        {a, b, b^2, b^2a, b^2ab, b^2aba(b^2)}
        
        {a, b, b^2, b^2a, b^2ab, b^2a(b^4)}
      - {a, b, b^2, b^2a, b^3a} (8 descendants)
        
        {a, b, b^2, b^4, b^2a, b^3a}
        
        {a, b, b^2, b^2a, b^2(a^3), b^3a}
        
        {a, b, b^2, b^2a, b^3a, b^2(a^2)b}
        
        {a, b, b^2, b^2a, b^3a, b^2aba}
        
        {a, b, b^2, b^2a, b^3a, b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2a, b^3a}
        
        {a, b, b^2, b^2a, b^3a, b^2(a^2)(b^2)}
        
        {a, b, b^2, b^2a, b^3a, b^2a(b^3)}
      - {a, b, b^2, b^4, b^2a} (9 descendants)
        
        {a, b, b^2, b^4, b^2a, b^2(a^3)}
        
        {a, b, b^2, b^4, b^2a, b^2(a^2)b}
        
        {a, b, b^2, b^4, b^2a, b^2aba}
        
        {a, b, b^2, b^4, b^2a, b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, b^2a}
        
        {a, b, b^2, b^4, b^2a, b^2(a^2)(b^2)}
        
        {a, b, b^2, b^4, b^2a, b^2a(b^3)}
        
        {a, b, b^2, b^4, b^2a, b^5a}
        
        {a, b, b^2, b^4, b^7, b^2a}
      - {a, b, b^2, b^2a, b^2(a^3)} (6 descendants)
        
        {a, b, b^2, b^2a, b^2(a^3), b^2(a^2)b}
        
        {a, b, b^2, b^2a, b^2(a^3), b^2aba}
        
        {a, b, b^2, b^2a, b^2(a^3), b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2a, b^2(a^3)}
        
        {a, b, b^2, b^2a, b^2(a^3), b^2(a^2)(b^2)}
        
        {a, b, b^2, b^2a, b^2(a^3), b^2a(b^3)}
      - {a, b, b^2, b^2a, b^2(a^2)b} (6 descendants)
        
        {a, b, b^2, b^2a, b^2(a^2)b, b^2aba}
        
        {a, b, b^2, b^2a, b^2a(b^2), b^2(a^2)b}
        
        {a, b, b^2, b^5, b^2a, b^2(a^2)b}
        
        {a, b, b^2, b^2a, b^2(a^2)b, b^2(a^2)(b^2)}
        
        {a, b, b^2, b^2a, b^2a(b^3), b^2(a^2)b}
        
        {a, b, b^2, b^2a, b^2(a^2)b, b^2(a^2)(b^2)a}
      - {a, b, b^2, b^2a, b^2aba} (4 descendants)
        
        {a, b, b^2, b^2a, b^2a(b^2), b^2aba}
        
        {a, b, b^2, b^5, b^2a, b^2aba}
        
        {a, b, b^2, b^2a, b^2(a^2)(b^2), b^2aba}
        
        {a, b, b^2, b^2a, b^2a(b^3), b^2aba}
      - {a, b, b^2, b^2a, b^2a(b^2)} (4 descendants)
        
        {a, b, b^2, b^5, b^2a, b^2a(b^2)}
        
        {a, b, b^2, b^2a, b^2a(b^2), b^2(a^2)(b^2)}
        
        {a, b, b^2, b^2a, b^2a(b^2), b^2a(b^3)}
        
        {a, b, b^2, b^2a, b^2a(b^2), b^2a(b^3)a}
      - {a, b, b^2, b^5, b^2a} (2 descendants)
        
        {a, b, b^2, b^5, b^2a, b^2(a^2)(b^2)}
        
        {a, b, b^2, b^5, b^2a, b^2a(b^3)}
      - {a, b, b^2, b^2a, b^2(a^2)(b^2)} (1 descendant)
        
        {a, b, b^2, b^2a, b^2a(b^3), b^2(a^2)(b^2)}
      - {a, b, b^2, b^2a, b^2a(b^3)} (0 descendants)
    - {a, b, b^2, b^3} (20 descendants)
      - {a, b, b^2, b^3, a^2(b^2)} (19 descendants)
        
        {a, b, b^2, b^3, a(b^3), a^2(b^2)}
        
        {a, b, b^2, b^3, a^2(b^2), ba(b^2)}
        
        {a, b, b^2, b^3, a^2(b^2), b^2(a^2)}
        
        {a, b, b^2, b^3, a^2(b^2), b^2ab}
        
        {a, b, b^2, b^3, a^2(b^2), b^3a}
        
        {a, b, b^2, b^3, b^4, a^2(b^2)}
        
        {a, b, b^2, b^3, a^2(b^2), a^2(b^3)}
        
        {a, b, b^2, b^3, a(b^4), a^2(b^2)}
        
        {a, b, b^2, b^3, a^2(b^2), ba(b^3)}
        
        {a, b, b^2, b^3, a^2(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^3, a^2(b^2), b^3(a^2)}
        
        {a, b, b^2, b^3, a^2(b^2), b^3ab}
        
        {a, b, b^2, b^3, a^2(b^2), b^4a}
        
        {a, b, b^2, b^3, b^5, a^2(b^2)}
        
        {a, b, b^2, b^3, a^2(b^2), b^2a(b^3)}
        
        {a, b, b^2, b^3, a^2(b^2), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, a^2(b^2)}
        
        {a, b, b^2, b^3, a^2(b^2), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, a^2(b^2)}
      - {a, b, b^2, b^3, a(b^3)} (24 descendants)
        
        {a, b, b^2, b^3, a(b^3), ba(b^2)}
        
        {a, b, b^2, b^3, a(b^3), b^2(a^2)}
        
        {a, b, b^2, b^3, a(b^3), b^2ab}
        
        {a, b, b^2, b^3, a(b^3), b^3a}
        
        {a, b, b^2, b^3, b^4, a(b^3)}
        
        {a, b, b^2, b^3, a(b^3), a^2(b^3)}
        
        {a, b, b^2, b^3, a(b^3), a(b^4)}
        
        {a, b, b^2, b^3, a(b^3), ba(b^3)}
        
        {a, b, b^2, b^3, a(b^3), b^2a(b^2)}
        
        {a, b, b^2, b^3, a(b^3), b^3(a^2)}
        
        {a, b, b^2, b^3, a(b^3), b^3ab}
        
        {a, b, b^2, b^3, a(b^3), b^4a}
        
        {a, b, b^2, b^3, b^5, a(b^3)}
        
        {a, b, b^2, b^3, a(b^3), a^3(b^3)}
        
        {a, b, b^2, b^3, a(b^3), aba(b^3)}
        
        {a, b, b^2, b^3, a(b^3), b(a^2)(b^3)}
        
        {a, b, b^2, b^3, a(b^3), b^2a(b^3)}
        
        {a, b, b^2, b^3, a(b^3), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, a(b^3)}
        
        {a, b, b^2, b^3, a(b^3), b^2(a^2)(b^3)}
        
        {a, b, b^2, b^3, a(b^3), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, a(b^3)}
        
        {a, b, b^2, b^3, a(b^3), b^3(a^2)(b^3)}
        
        {a, b, b^2, b^3, a(b^3), b^4a(b^3)}
      - {a, b, b^2, b^3, ba(b^2)} (17 descendants)
        
        {a, b, b^2, b^3, b^2(a^2), ba(b^2)}
        
        {a, b, b^2, b^3, ba(b^2), b^2ab}
        
        {a, b, b^2, b^3, b^3a, ba(b^2)}
        
        {a, b, b^2, b^3, b^4, ba(b^2)}
        
        {a, b, b^2, b^3, a^2(b^3), ba(b^2)}
        
        {a, b, b^2, b^3, a(b^4), ba(b^2)}
        
        {a, b, b^2, b^3, ba(b^2), ba(b^3)}
        
        {a, b, b^2, b^3, ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^3, b^3(a^2), ba(b^2)}
        
        {a, b, b^2, b^3, ba(b^2), b^3ab}
        
        {a, b, b^2, b^3, b^4a, ba(b^2)}
        
        {a, b, b^2, b^3, b^5, ba(b^2)}
        
        {a, b, b^2, b^3, ba(b^2), b^2a(b^3)}
        
        {a, b, b^2, b^3, ba(b^2), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, ba(b^2)}
        
        {a, b, b^2, b^3, ba(b^2), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, ba(b^2)}
      - {a, b, b^2, b^3, b^2(a^2)} (16 descendants)
        
        {a, b, b^2, b^3, b^2(a^2), b^2ab}
        
        {a, b, b^2, b^3, b^2(a^2), b^3a}
        
        {a, b, b^2, b^3, b^4, b^2(a^2)}
        
        {a, b, b^2, b^3, a^2(b^3), b^2(a^2)}
        
        {a, b, b^2, b^3, a(b^4), b^2(a^2)}
        
        {a, b, b^2, b^3, b^2(a^2), ba(b^3)}
        
        {a, b, b^2, b^3, b^2(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^3, b^2(a^2), b^3(a^2)}
        
        {a, b, b^2, b^3, b^2(a^2), b^3ab}
        
        {a, b, b^2, b^3, b^2(a^2), b^4a}
        
        {a, b, b^2, b^3, b^5, b^2(a^2)}
        
        {a, b, b^2, b^3, b^2(a^2), b^2a(b^3)}
        
        {a, b, b^2, b^3, b^2(a^2), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, b^2(a^2)}
        
        {a, b, b^2, b^3, b^2(a^2), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, b^2(a^2)}
      - {a, b, b^2, b^3, b^2ab} (15 descendants)
        
        {a, b, b^2, b^3, b^3a, b^2ab}
        
        {a, b, b^2, b^3, b^4, b^2ab}
        
        {a, b, b^2, b^3, a^2(b^3), b^2ab}
        
        {a, b, b^2, b^3, a(b^4), b^2ab}
        
        {a, b, b^2, b^3, ba(b^3), b^2ab}
        
        {a, b, b^2, b^3, b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^3, b^3(a^2), b^2ab}
        
        {a, b, b^2, b^3, b^2ab, b^3ab}
        
        {a, b, b^2, b^3, b^4a, b^2ab}
        
        {a, b, b^2, b^3, b^5, b^2ab}
        
        {a, b, b^2, b^3, b^2ab, b^2a(b^3)}
        
        {a, b, b^2, b^3, b^2ab, b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, b^2ab}
        
        {a, b, b^2, b^3, b^2ab, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, b^2ab}
      - {a, b, b^2, b^3, b^3a} (20 descendants)
        
        {a, b, b^2, b^3, b^4, b^3a}
        
        {a, b, b^2, b^3, a^2(b^3), b^3a}
        
        {a, b, b^2, b^3, a(b^4), b^3a}
        
        {a, b, b^2, b^3, b^3a, ba(b^3)}
        
        {a, b, b^2, b^3, b^3a, b^2a(b^2)}
        
        {a, b, b^2, b^3, b^3a, b^3(a^2)}
        
        {a, b, b^2, b^3, b^3a, b^3ab}
        
        {a, b, b^2, b^3, b^3a, b^4a}
        
        {a, b, b^2, b^3, b^5, b^3a}
        
        {a, b, b^2, b^3, b^3a, b^2a(b^3)}
        
        {a, b, b^2, b^3, b^3a, b^3(a^3)}
        
        {a, b, b^2, b^3, b^3a, b^3(a^2)b}
        
        {a, b, b^2, b^3, b^3a, b^3aba}
        
        {a, b, b^2, b^3, b^3a, b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, b^3a}
        
        {a, b, b^2, b^3, b^3a, b^3(a^2)(b^2)}
        
        {a, b, b^2, b^3, b^3a, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, b^3a}
        
        {a, b, b^2, b^3, b^3a, b^3(a^2)(b^3)}
        
        {a, b, b^2, b^3, b^3a, b^3a(b^4)}
      - {a, b, b^2, b^3, b^4} (26 descendants)
        
        {a, b, b^2, b^3, b^4, a^2(b^3)}
        
        {a, b, b^2, b^3, b^4, a(b^4)}
        
        {a, b, b^2, b^3, b^4, ba(b^3)}
        
        {a, b, b^2, b^3, b^4, b^2a(b^2)}
        
        {a, b, b^2, b^3, b^4, b^3(a^2)}
        
        {a, b, b^2, b^3, b^4, b^3ab}
        
        {a, b, b^2, b^3, b^4, b^4a}
        
        {a, b, b^2, b^3, b^4, b^5}
        
        {a, b, b^2, b^3, b^4, a^2(b^4)}
        
        {a, b, b^2, b^3, b^4, a(b^5)}
        
        {a, b, b^2, b^3, b^4, ba(b^4)}
        
        {a, b, b^2, b^3, b^4, b^2a(b^3)}
        
        {a, b, b^2, b^3, b^4, b^3a(b^2)}
        
        {a, b, b^2, b^3, b^4, b^4(a^2)}
        
        {a, b, b^2, b^3, b^4, b^4ab}
        
        {a, b, b^2, b^3, b^4, b^5a}
        
        {a, b, b^2, b^3, b^4, b^6}
        
        {a, b, b^2, b^3, b^4, b^2a(b^4)}
        
        {a, b, b^2, b^3, b^4, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^4, b^4a(b^2)}
        
        {a, b, b^2, b^3, b^4, b^7}
        
        {a, b, b^2, b^3, b^4, b^3a(b^4)}
        
        {a, b, b^2, b^3, b^4, b^4a(b^3)}
        
        {a, b, b^2, b^3, b^4, b^8}
        
        {a, b, b^2, b^3, b^4, b^4a(b^4)}
        
        {a, b, b^2, b^3, b^4, b^9}
      - {a, b, b^2, b^3, a^2(b^3)} (12 descendants)
        
        {a, b, b^2, b^3, a(b^4), a^2(b^3)}
        
        {a, b, b^2, b^3, a^2(b^3), ba(b^3)}
        
        {a, b, b^2, b^3, a^2(b^3), b^2a(b^2)}
        
        {a, b, b^2, b^3, a^2(b^3), b^3(a^2)}
        
        {a, b, b^2, b^3, a^2(b^3), b^3ab}
        
        {a, b, b^2, b^3, a^2(b^3), b^4a}
        
        {a, b, b^2, b^3, b^5, a^2(b^3)}
        
        {a, b, b^2, b^3, a^2(b^3), b^2a(b^3)}
        
        {a, b, b^2, b^3, a^2(b^3), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, a^2(b^3)}
        
        {a, b, b^2, b^3, a^2(b^3), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, a^2(b^3)}
      - {a, b, b^2, b^3, a(b^4)} (11 descendants)
        
        {a, b, b^2, b^3, a(b^4), ba(b^3)}
        
        {a, b, b^2, b^3, a(b^4), b^2a(b^2)}
        
        {a, b, b^2, b^3, a(b^4), b^3(a^2)}
        
        {a, b, b^2, b^3, a(b^4), b^3ab}
        
        {a, b, b^2, b^3, a(b^4), b^4a}
        
        {a, b, b^2, b^3, b^5, a(b^4)}
        
        {a, b, b^2, b^3, a(b^4), b^2a(b^3)}
        
        {a, b, b^2, b^3, a(b^4), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, a(b^4)}
        
        {a, b, b^2, b^3, a(b^4), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, a(b^4)}
      - {a, b, b^2, b^3, ba(b^3)} (10 descendants)
        
        {a, b, b^2, b^3, ba(b^3), b^2a(b^2)}
        
        {a, b, b^2, b^3, b^3(a^2), ba(b^3)}
        
        {a, b, b^2, b^3, ba(b^3), b^3ab}
        
        {a, b, b^2, b^3, b^4a, ba(b^3)}
        
        {a, b, b^2, b^3, b^5, ba(b^3)}
        
        {a, b, b^2, b^3, ba(b^3), b^2a(b^3)}
        
        {a, b, b^2, b^3, ba(b^3), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, ba(b^3)}
        
        {a, b, b^2, b^3, ba(b^3), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, ba(b^3)}
      - {a, b, b^2, b^3, b^2a(b^2)} (9 descendants)
        
        {a, b, b^2, b^3, b^3(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^3, b^2a(b^2), b^3ab}
        
        {a, b, b^2, b^3, b^4a, b^2a(b^2)}
        
        {a, b, b^2, b^3, b^5, b^2a(b^2)}
        
        {a, b, b^2, b^3, b^2a(b^2), b^2a(b^3)}
        
        {a, b, b^2, b^3, b^2a(b^2), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, b^2a(b^2)}
        
        {a, b, b^2, b^3, b^2a(b^2), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, b^2a(b^2)}
      - {a, b, b^2, b^3, b^3(a^2)} (8 descendants)
        
        {a, b, b^2, b^3, b^3(a^2), b^3ab}
        
        {a, b, b^2, b^3, b^3(a^2), b^4a}
        
        {a, b, b^2, b^3, b^5, b^3(a^2)}
        
        {a, b, b^2, b^3, b^3(a^2), b^2a(b^3)}
        
        {a, b, b^2, b^3, b^3(a^2), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, b^3(a^2)}
        
        {a, b, b^2, b^3, b^3(a^2), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, b^3(a^2)}
      - {a, b, b^2, b^3, b^3ab} (7 descendants)
        
        {a, b, b^2, b^3, b^4a, b^3ab}
        
        {a, b, b^2, b^3, b^5, b^3ab}
        
        {a, b, b^2, b^3, b^2a(b^3), b^3ab}
        
        {a, b, b^2, b^3, b^3ab, b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, b^3ab}
        
        {a, b, b^2, b^3, b^3ab, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, b^3ab}
      - {a, b, b^2, b^3, b^4a} (6 descendants)
        
        {a, b, b^2, b^3, b^5, b^4a}
        
        {a, b, b^2, b^3, b^4a, b^2a(b^3)}
        
        {a, b, b^2, b^3, b^4a, b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, b^4a}
        
        {a, b, b^2, b^3, b^4a, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, b^4a}
      - {a, b, b^2, b^3, b^5} (6 descendants)
        
        {a, b, b^2, b^3, b^5, b^2a(b^3)}
        
        {a, b, b^2, b^3, b^5, b^3a(b^2)}
        
        {a, b, b^2, b^3, b^5, b^6}
        
        {a, b, b^2, b^3, b^5, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^5, b^7}
        
        {a, b, b^2, b^3, b^5, b^9}
      - {a, b, b^2, b^3, b^2a(b^3)} (4 descendants)
        
        {a, b, b^2, b^3, b^2a(b^3), b^3a(b^2)}
        
        {a, b, b^2, b^3, b^6, b^2a(b^3)}
        
        {a, b, b^2, b^3, b^2a(b^3), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, b^2a(b^3)}
      - {a, b, b^2, b^3, b^3a(b^2)} (3 descendants)
        
        {a, b, b^2, b^3, b^6, b^3a(b^2)}
        
        {a, b, b^2, b^3, b^3a(b^2), b^3a(b^3)}
        
        {a, b, b^2, b^3, b^7, b^3a(b^2)}
      - {a, b, b^2, b^3, b^6} (2 descendants)
        
        {a, b, b^2, b^3, b^6, b^3a(b^3)}
        
        {a, b, b^2, b^3, b^6, b^7}
      - {a, b, b^2, b^3, b^3a(b^3)} (1 descendant)
        
        {a, b, b^2, b^3, b^7, b^3a(b^3)}
      - {a, b, b^2, b^3, b^7} (0 descendants)
    - {a, b, b^2, a^2(b^2)} (8 descendants)
      - {a, b, b^2, a(b^3), a^2(b^2)} (7 descendants)
        
        {a, b, b^2, a(b^3), a^2(b^2), ba(b^2)}
        
        {a, b, b^2, a(b^3), a^2(b^2), b^2(a^2)}
        
        {a, b, b^2, a(b^3), a^2(b^2), b^2ab}
        
        {a, b, b^2, a(b^3), a^2(b^2), b^3a}
        
        {a, b, b^2, b^4, a(b^3), a^2(b^2)}
        
        {a, b, b^2, a(b^3), a^2(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^3), a^2(b^2)}
      - {a, b, b^2, a^2(b^2), ba(b^2)} (6 descendants)
        
        {a, b, b^2, a^2(b^2), b^2(a^2), ba(b^2)}
        
        {a, b, b^2, a^2(b^2), ba(b^2), b^2ab}
        
        {a, b, b^2, a^2(b^2), b^3a, ba(b^2)}
        
        {a, b, b^2, b^4, a^2(b^2), ba(b^2)}
        
        {a, b, b^2, a^2(b^2), ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2(b^2), ba(b^2)}
      - {a, b, b^2, a^2(b^2), b^2(a^2)} (6 descendants)
        
        {a, b, b^2, a^2(b^2), b^2(a^2), b^2ab}
        
        {a, b, b^2, a^2(b^2), b^2(a^2), b^3a}
        
        {a, b, b^2, b^4, a^2(b^2), b^2(a^2)}
        
        {a, b, b^2, a^2(b^2), b^2(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2(b^2), b^2(a^2)}
        
        {a, b, b^2, a^2(b^2), b^2(a^2), b^2(a^3)(b^2)}
      - {a, b, b^2, a^2(b^2), b^2ab} (4 descendants)
        
        {a, b, b^2, a^2(b^2), b^3a, b^2ab}
        
        {a, b, b^2, b^4, a^2(b^2), b^2ab}
        
        {a, b, b^2, a^2(b^2), b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2(b^2), b^2ab}
      - {a, b, b^2, a^2(b^2), b^3a} (4 descendants)
        
        {a, b, b^2, b^4, a^2(b^2), b^3a}
        
        {a, b, b^2, a^2(b^2), b^3a, b^2a(b^2)}
        
        {a, b, b^2, b^5, a^2(b^2), b^3a}
        
        {a, b, b^2, a^2(b^2), b^3a, b^3(a^2)(b^2)}
      - {a, b, b^2, b^4, a^2(b^2)} (3 descendants)
        
        {a, b, b^2, b^4, a^2(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, a^2(b^2)}
        
        {a, b, b^2, b^4, b^7, a^2(b^2)}
      - {a, b, b^2, a^2(b^2), b^2a(b^2)} (1 descendant)
        
        {a, b, b^2, b^5, a^2(b^2), b^2a(b^2)}
      - {a, b, b^2, b^5, a^2(b^2)} (0 descendants)
    - {a, b, b^2, a(b^3)} (7 descendants)
      - {a, b, b^2, a(b^3), ba(b^2)} (6 descendants)
        
        {a, b, b^2, a(b^3), b^2(a^2), ba(b^2)}
        
        {a, b, b^2, a(b^3), ba(b^2), b^2ab}
        
        {a, b, b^2, a(b^3), b^3a, ba(b^2)}
        
        {a, b, b^2, b^4, a(b^3), ba(b^2)}
        
        {a, b, b^2, a(b^3), ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^3), ba(b^2)}
      - {a, b, b^2, a(b^3), b^2(a^2)} (6 descendants)
        
        {a, b, b^2, a(b^3), b^2(a^2), b^2ab}
        
        {a, b, b^2, a(b^3), b^2(a^2), b^3a}
        
        {a, b, b^2, b^4, a(b^3), b^2(a^2)}
        
        {a, b, b^2, a(b^3), b^2(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^3), b^2(a^2)}
        
        {a, b, b^2, a(b^3), b^2(a^2), b^2(a^2)(b^3)}
      - {a, b, b^2, a(b^3), b^2ab} (4 descendants)
        
        {a, b, b^2, a(b^3), b^3a, b^2ab}
        
        {a, b, b^2, b^4, a(b^3), b^2ab}
        
        {a, b, b^2, a(b^3), b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^3), b^2ab}
      - {a, b, b^2, a(b^3), b^3a} (4 descendants)
        
        {a, b, b^2, b^4, a(b^3), b^3a}
        
        {a, b, b^2, a(b^3), b^3a, b^2a(b^2)}
        
        {a, b, b^2, b^5, a(b^3), b^3a}
        
        {a, b, b^2, a(b^3), b^3a, b^3a(b^3)}
      - {a, b, b^2, b^4, a(b^3)} (3 descendants)
        
        {a, b, b^2, b^4, a(b^3), b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, a(b^3)}
        
        {a, b, b^2, b^4, b^7, a(b^3)}
      - {a, b, b^2, a(b^3), b^2a(b^2)} (1 descendant)
        
        {a, b, b^2, b^5, a(b^3), b^2a(b^2)}
      - {a, b, b^2, b^5, a(b^3)} (0 descendants)
    - {a, b, b^2, ba(b^2)} (6 descendants)
      - {a, b, b^2, b^2(a^2), ba(b^2)} (5 descendants)
        
        {a, b, b^2, b^2(a^2), ba(b^2), b^2ab}
        
        {a, b, b^2, b^2(a^2), b^3a, ba(b^2)}
        
        {a, b, b^2, b^4, b^2(a^2), ba(b^2)}
        
        {a, b, b^2, b^2(a^2), ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2(a^2), ba(b^2)}
      - {a, b, b^2, ba(b^2), b^2ab} (5 descendants)
        
        {a, b, b^2, b^3a, ba(b^2), b^2ab}
        
        {a, b, b^2, b^4, ba(b^2), b^2ab}
        
        {a, b, b^2, ba(b^2), b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^5, ba(b^2), b^2ab}
        
        {a, b, b^2, ba(b^2), b^2ab, b^2aba(b^2)}
      - {a, b, b^2, b^3a, ba(b^2)} (3 descendants)
        
        {a, b, b^2, b^4, b^3a, ba(b^2)}
        
        {a, b, b^2, b^3a, ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^5, b^3a, ba(b^2)}
      - {a, b, b^2, b^4, ba(b^2)} (4 descendants)
        
        {a, b, b^2, b^4, ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, ba(b^2)}
        
        {a, b, b^2, b^4, ba(b^2), b^4a(b^2)}
        
        {a, b, b^2, b^4, b^7, ba(b^2)}
      - {a, b, b^2, ba(b^2), b^2a(b^2)} (3 descendants)
        
        {a, b, b^2, b^5, ba(b^2), b^2a(b^2)}
        
        {a, b, b^2, ba(b^2), b^2a(b^2), ba(b^2)a(b^2)}
        
        {a, b, b^2, ba(b^2), b^2a(b^2), b^2a(b^2)a(b^2)}
      - {a, b, b^2, b^5, ba(b^2)} (0 descendants)
    - {a, b, b^2, b^2(a^2)} (5 descendants)
      - {a, b, b^2, b^2(a^2), b^2ab} (4 descendants)
        
        {a, b, b^2, b^2(a^2), b^3a, b^2ab}
        
        {a, b, b^2, b^4, b^2(a^2), b^2ab}
        
        {a, b, b^2, b^2(a^2), b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2(a^2), b^2ab}
      - {a, b, b^2, b^2(a^2), b^3a} (3 descendants)
        
        {a, b, b^2, b^4, b^2(a^2), b^3a}
        
        {a, b, b^2, b^2(a^2), b^3a, b^2a(b^2)}
        
        {a, b, b^2, b^5, b^2(a^2), b^3a}
      - {a, b, b^2, b^4, b^2(a^2)} (3 descendants)
        
        {a, b, b^2, b^4, b^2(a^2), b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, b^2(a^2)}
        
        {a, b, b^2, b^4, b^7, b^2(a^2)}
      - {a, b, b^2, b^2(a^2), b^2a(b^2)} (1 descendant)
        
        {a, b, b^2, b^5, b^2(a^2), b^2a(b^2)}
      - {a, b, b^2, b^5, b^2(a^2)} (0 descendants)
    - {a, b, b^2, b^2ab} (4 descendants)
      - {a, b, b^2, b^3a, b^2ab} (3 descendants)
        
        {a, b, b^2, b^4, b^3a, b^2ab}
        
        {a, b, b^2, b^3a, b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^5, b^3a, b^2ab}
      - {a, b, b^2, b^4, b^2ab} (4 descendants)
        
        {a, b, b^2, b^4, b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, b^2ab}
        
        {a, b, b^2, b^4, b^2ab, b^2a(b^4)}
        
        {a, b, b^2, b^4, b^7, b^2ab}
      - {a, b, b^2, b^2ab, b^2a(b^2)} (3 descendants)
        
        {a, b, b^2, b^5, b^2ab, b^2a(b^2)}
        
        {a, b, b^2, b^2ab, b^2a(b^2), b^2a(b^2)ab}
        
        {a, b, b^2, b^2ab, b^2a(b^2), b^2a(b^2)a(b^2)}
      - {a, b, b^2, b^5, b^2ab} (0 descendants)
    - {a, b, b^2, b^3a} (3 descendants)
      - {a, b, b^2, b^4, b^3a} (3 descendants)
        
        {a, b, b^2, b^4, b^3a, b^2a(b^2)}
        
        {a, b, b^2, b^4, b^5, b^3a}
        
        {a, b, b^2, b^4, b^7, b^3a}
      - {a, b, b^2, b^3a, b^2a(b^2)} (1 descendant)
        
        {a, b, b^2, b^5, b^3a, b^2a(b^2)}
      - {a, b, b^2, b^5, b^3a} (0 descendants)
    - {a, b, b^2, b^4} (3 descendants)
      - {a, b, b^2, b^4, b^2a(b^2)} (2 descendants)
        
        {a, b, b^2, b^4, b^5, b^2a(b^2)}
        
        {a, b, b^2, b^4, b^7, b^2a(b^2)}
      - {a, b, b^2, b^4, b^5} (2 descendants)
        
        {a, b, b^2, b^4, b^5, b^7}
        
        {a, b, b^2, b^4, b^5, b^8}
      - {a, b, b^2, b^4, b^7} (0 descendants)
    - {a, b, b^2, b^2a(b^2)} (1 descendant)
      - {a, b, b^2, b^5, b^2a(b^2)} (0 descendants)
    - {a, b, b^2, b^5} (0 descendants)
  - {a, b, a^3} (8 descendants)
    - {a, b, a^3, a^2b} (8 descendants)
      - {a, b, a^3, a^2b, aba} (11 descendants)
        
        {a, b, a^3, a(b^2), a^2b, aba}
        
        {a, b, a^3, b(a^2), a^2b, aba}
        
        {a, b, a^3, a^2b, aba, bab}
        
        {a, b, a^3, a^2b, b^2a, aba}
        
        {a, b, a^3, b^3, a^2b, aba}
        
        {a, b, a^3, a^5, a^2b, aba}
        
        {a, b, a^3, a^2b, a^4b, aba}
        
        {a, b, a^3, a^2b, aba, a^3ba}
        
        {a, b, a^3, a^2b, aba, ab(a^3)}
        
        {a, b, a^3, a^2b, aba, ab(a^2)b}
        
        {a, b, a^3, a^2b, aba, ababa}
      - {a, b, a^3, a(b^2), a^2b} (7 descendants)
        
        {a, b, a^3, a(b^2), b(a^2), a^2b}
        
        {a, b, a^3, a(b^2), a^2b, bab}
        
        {a, b, a^3, a(b^2), a^2b, b^2a}
        
        {a, b, a^3, b^3, a(b^2), a^2b}
        
        {a, b, a^3, a^5, a(b^2), a^2b}
        
        {a, b, a^3, a(b^2), a^2b, a^4b}
        
        {a, b, a^3, a(b^2), a^2b, a^3(b^2)}
      - {a, b, a^3, b(a^2), a^2b} (8 descendants)
        
        {a, b, a^3, b(a^2), a^2b, bab}
        
        {a, b, a^3, b(a^2), a^2b, b^2a}
        
        {a, b, a^3, b^3, b(a^2), a^2b}
        
        {a, b, a^3, a^5, b(a^2), a^2b}
        
        {a, b, a^3, b(a^2), a^2b, a^4b}
        
        {a, b, a^3, b(a^2), a^2b, a^2b(a^2)}
        
        {a, b, a^3, b(a^2), b(a^4), a^2b}
        
        {a, b, a^3, b(a^2), a^2b, b(a^3)b}
      - {a, b, a^3, a^2b, bab} (6 descendants)
        
        {a, b, a^3, a^2b, b^2a, bab}
        
        {a, b, a^3, b^3, a^2b, bab}
        
        {a, b, a^3, a^5, a^2b, bab}
        
        {a, b, a^3, a^2b, a^4b, bab}
        
        {a, b, a^3, a^2b, bab, a^2bab}
        
        {a, b, a^3, a^2b, bab, babab}
      - {a, b, a^3, a^2b, b^2a} (6 descendants)
        
        {a, b, a^3, b^3, a^2b, b^2a}
        
        {a, b, a^3, a^5, a^2b, b^2a}
        
        {a, b, a^3, a^2b, a^4b, b^2a}
        
        {a, b, a^3, a^2b, b^2a, a^2(b^2)a}
        
        {a, b, a^3, a^2b, b^2a, b^2(a^3)}
        
        {a, b, a^3, a^2b, b^2a, b^2(a^2)b}
      - {a, b, a^3, b^3, a^2b} (4 descendants)
        
        {a, b, a^3, a^5, b^3, a^2b}
        
        {a, b, a^3, b^3, a^2b, a^4b}
        
        {a, b, a^3, b^3, a^2b, a^2(b^3)}
        
        {a, b, a^3, b^3, b^5, a^2b}
      - {a, b, a^3, a^5, a^2b} (2 descendants)
        
        {a, b, a^3, a^5, a^2b, a^4b}
        
        {a, b, a^3, a^5, a^7, a^2b}
      - {a, b, a^3, a^2b, a^4b} (0 descendants)
    - {a, b, a^3, aba} (9 descendants)
      - {a, b, a^3, a(b^2), aba} (10 descendants)
        
        {a, b, a^3, a(b^2), b(a^2), aba}
        
        {a, b, a^3, a(b^2), aba, bab}
        
        {a, b, a^3, a(b^2), b^2a, aba}
        
        {a, b, a^3, b^3, a(b^2), aba}
        
        {a, b, a^3, a^5, a(b^2), aba}
        
        {a, b, a^3, a(b^2), aba, a^3ba}
        
        {a, b, a^3, a(b^2), a^3(b^2), aba}
        
        {a, b, a^3, a(b^2), aba, ab(a^3)}
        
        {a, b, a^3, a(b^2), aba, ababa}
        
        {a, b, a^3, a(b^2), aba, aba(b^2)}
      - {a, b, a^3, b(a^2), aba} (9 descendants)
        
        {a, b, a^3, b(a^2), aba, bab}
        
        {a, b, a^3, b(a^2), b^2a, aba}
        
        {a, b, a^3, b^3, b(a^2), aba}
        
        {a, b, a^3, a^5, b(a^2), aba}
        
        {a, b, a^3, b(a^2), aba, a^3ba}
        
        {a, b, a^3, b(a^2), aba, ab(a^3)}
        
        {a, b, a^3, b(a^2), aba, ababa}
        
        {a, b, a^3, b(a^2), b(a^4), aba}
        
        {a, b, a^3, b(a^2), aba, b(a^2)ba}
      - {a, b, a^3, aba, bab} (7 descendants)
        
        {a, b, a^3, b^2a, aba, bab}
        
        {a, b, a^3, b^3, aba, bab}
        
        {a, b, a^3, a^5, aba, bab}
        
        {a, b, a^3, aba, bab, a^3ba}
        
        {a, b, a^3, aba, ab(a^3), bab}
        
        {a, b, a^3, aba, bab, ababa}
        
        {a, b, a^3, aba, bab, babab}
      - {a, b, a^3, b^2a, aba} (7 descendants)
        
        {a, b, a^3, b^3, b^2a, aba}
        
        {a, b, a^3, a^5, b^2a, aba}
        
        {a, b, a^3, b^2a, aba, a^3ba}
        
        {a, b, a^3, b^2a, aba, ab(a^3)}
        
        {a, b, a^3, b^2a, aba, ababa}
        
        {a, b, a^3, b^2a, b^2(a^3), aba}
        
        {a, b, a^3, b^2a, aba, b^2aba}
      - {a, b, a^3, b^3, aba} (5 descendants)
        
        {a, b, a^3, a^5, b^3, aba}
        
        {a, b, a^3, b^3, aba, a^3ba}
        
        {a, b, a^3, b^3, aba, ab(a^3)}
        
        {a, b, a^3, b^3, aba, ababa}
        
        {a, b, a^3, b^3, b^5, aba}
      - {a, b, a^3, a^5, aba} (4 descendants)
        
        {a, b, a^3, a^5, aba, a^3ba}
        
        {a, b, a^3, a^5, aba, ab(a^3)}
        
        {a, b, a^3, a^5, aba, ababa}
        
        {a, b, a^3, a^5, a^7, aba}
      - {a, b, a^3, aba, a^3ba} (2 descendants)
        
        {a, b, a^3, aba, ab(a^3), a^3ba}
        
        {a, b, a^3, aba, a^3ba, ababa}
      - {a, b, a^3, aba, ab(a^3)} (1 descendant)
        
        {a, b, a^3, aba, ab(a^3), ababa}
      - {a, b, a^3, aba, ababa} (1 descendant)
        
        {a, b, a^3, aba, ababa, abababa}
    - {a, b, a^3, a(b^2)} (6 descendants)
      - {a, b, a^3, a(b^2), b(a^2)} (8 descendants)
        
        {a, b, a^3, a(b^2), b(a^2), bab}
        
        {a, b, a^3, a(b^2), b(a^2), b^2a}
        
        {a, b, a^3, b^3, a(b^2), b(a^2)}
        
        {a, b, a^3, a^5, a(b^2), b(a^2)}
        
        {a, b, a^3, a(b^2), b(a^2), a^3(b^2)}
        
        {a, b, a^3, a(b^2), b(a^2), a(b^2)(a^2)}
        
        {a, b, a^3, a(b^2), b(a^2), b(a^4)}
        
        {a, b, a^3, a(b^2), b(a^2), b(a^2)(b^2)}
      - {a, b, a^3, a(b^2), bab} (6 descendants)
        
        {a, b, a^3, a(b^2), b^2a, bab}
        
        {a, b, a^3, b^3, a(b^2), bab}
        
        {a, b, a^3, a^5, a(b^2), bab}
        
        {a, b, a^3, a(b^2), a^3(b^2), bab}
        
        {a, b, a^3, a(b^2), bab, a(b^2)ab}
        
        {a, b, a^3, a(b^2), bab, babab}
      - {a, b, a^3, a(b^2), b^2a} (6 descendants)
        
        {a, b, a^3, b^3, a(b^2), b^2a}
        
        {a, b, a^3, a^5, a(b^2), b^2a}
        
        {a, b, a^3, a(b^2), a^3(b^2), b^2a}
        
        {a, b, a^3, a(b^2), b^2a, a(b^3)a}
        
        {a, b, a^3, a(b^2), b^2a, b^2(a^3)}
        
        {a, b, a^3, a(b^2), b^2a, b^2a(b^2)}
      - {a, b, a^3, b^3, a(b^2)} (4 descendants)
        
        {a, b, a^3, a^5, b^3, a(b^2)}
        
        {a, b, a^3, b^3, a(b^2), a^3(b^2)}
        
        {a, b, a^3, b^3, a(b^2), a(b^4)}
        
        {a, b, a^3, b^3, b^5, a(b^2)}
      - {a, b, a^3, a^5, a(b^2)} (2 descendants)
        
        {a, b, a^3, a^5, a(b^2), a^3(b^2)}
        
        {a, b, a^3, a^5, a^7, a(b^2)}
      - {a, b, a^3, a(b^2), a^3(b^2)} (0 descendants)
    - {a, b, a^3, b(a^2)} (5 descendants)
      - {a, b, a^3, b(a^2), bab} (6 descendants)
        
        {a, b, a^3, b(a^2), b^2a, bab}
        
        {a, b, a^3, b^3, b(a^2), bab}
        
        {a, b, a^3, a^5, b(a^2), bab}
        
        {a, b, a^3, b(a^2), b(a^4), bab}
        
        {a, b, a^3, b(a^2), bab, bab(a^2)}
        
        {a, b, a^3, b(a^2), bab, babab}
      - {a, b, a^3, b(a^2), b^2a} (4 descendants)
        
        {a, b, a^3, b^3, b(a^2), b^2a}
        
        {a, b, a^3, a^5, b(a^2), b^2a}
        
        {a, b, a^3, b(a^2), b(a^4), b^2a}
        
        {a, b, a^3, b(a^2), b^2a, b^2(a^3)}
      - {a, b, a^3, b^3, b(a^2)} (4 descendants)
        
        {a, b, a^3, a^5, b^3, b(a^2)}
        
        {a, b, a^3, b^3, b(a^2), b(a^4)}
        
        {a, b, a^3, b^3, b(a^2), b^3(a^2)}
        
        {a, b, a^3, b^3, b^5, b(a^2)}
      - {a, b, a^3, a^5, b(a^2)} (2 descendants)
        
        {a, b, a^3, a^5, b(a^2), b(a^4)}
        
        {a, b, a^3, a^5, a^7, b(a^2)}
      - {a, b, a^3, b(a^2), b(a^4)} (0 descendants)
    - {a, b, a^3, bab} (4 descendants)
      - {a, b, a^3, b^2a, bab} (5 descendants)
        
        {a, b, a^3, b^3, b^2a, bab}
        
        {a, b, a^3, a^5, b^2a, bab}
        
        {a, b, a^3, b^2a, bab, babab}
        
        {a, b, a^3, b^2a, bab, ba(b^2)a}
        
        {a, b, a^3, b^2a, b^2(a^3), bab}
      - {a, b, a^3, b^3, bab} (5 descendants)
        
        {a, b, a^3, a^5, b^3, bab}
        
        {a, b, a^3, b^3, bab, babab}
        
        {a, b, a^3, b^3, bab, ba(b^3)}
        
        {a, b, a^3, b^3, bab, b^3ab}
        
        {a, b, a^3, b^3, b^5, bab}
      - {a, b, a^3, a^5, bab} (2 descendants)
        
        {a, b, a^3, a^5, bab, babab}
        
        {a, b, a^3, a^5, a^7, bab}
      - {a, b, a^3, bab, babab} (1 descendant)
        
        {a, b, a^3, bab, babab, bababab}
    - {a, b, a^3, b^2a} (3 descendants)
      - {a, b, a^3, b^3, b^2a} (4 descendants)
        
        {a, b, a^3, a^5, b^3, b^2a}
        
        {a, b, a^3, b^3, b^2a, b^2(a^3)}
        
        {a, b, a^3, b^3, b^2a, b^4a}
        
        {a, b, a^3, b^3, b^5, b^2a}
      - {a, b, a^3, a^5, b^2a} (2 descendants)
        
        {a, b, a^3, a^5, b^2a, b^2(a^3)}
        
        {a, b, a^3, a^5, a^7, b^2a}
      - {a, b, a^3, b^2a, b^2(a^3)} (0 descendants)
    - {a, b, a^3, b^3} (2 descendants)
      - {a, b, a^3, a^5, b^3} (2 descendants)
        
        {a, b, a^3, a^5, b^3, b^5}
        
        {a, b, a^3, a^5, a^7, b^3}
      - {a, b, a^3, b^3, b^5} (1 descendant)
        
        {a, b, a^3, b^3, b^5, b^7}
    - {a, b, a^3, a^5} (1 descendant)
      - {a, b, a^3, a^5, a^7} (1 descendant)
        
        {a, b, a^3, a^5, a^7, a^9}
  - {a, b, a^2b} (6 descendants)
    - {a, b, a^2b, aba} (7 descendants)
      - {a, b, a(b^2), a^2b, aba} (7 descendants)
        
        {a, b, a(b^2), b(a^2), a^2b, aba}
        
        {a, b, a(b^2), a^2b, aba, bab}
        
        {a, b, a(b^2), a^2b, b^2a, aba}
        
        {a, b, b^3, a(b^2), a^2b, aba}
        
        {a, b, a(b^2), a^2b, aba, ab(a^2)b}
        
        {a, b, a(b^2), a^2b, aba, ababa}
        
        {a, b, a(b^2), a^2b, aba, aba(b^2)}
      - {a, b, b(a^2), a^2b, aba} (8 descendants)
        
        {a, b, b(a^2), a^2b, aba, bab}
        
        {a, b, b(a^2), a^2b, b^2a, aba}
        
        {a, b, b^3, b(a^2), a^2b, aba}
        
        {a, b, b(a^2), a^2b, aba, a^2b(a^2)}
        
        {a, b, b(a^2), a^2b, aba, ab(a^2)b}
        
        {a, b, b(a^2), a^2b, aba, ababa}
        
        {a, b, b(a^2), a^2b, aba, b(a^3)b}
        
        {a, b, b(a^2), a^2b, aba, b(a^2)ba}
      - {a, b, a^2b, aba, bab} (6 descendants)
        
        {a, b, a^2b, b^2a, aba, bab}
        
        {a, b, b^3, a^2b, aba, bab}
        
        {a, b, a^2b, aba, bab, a^2bab}
        
        {a, b, a^2b, aba, bab, ab(a^2)b}
        
        {a, b, a^2b, aba, bab, ababa}
        
        {a, b, a^2b, aba, bab, babab}
      - {a, b, a^2b, b^2a, aba} (6 descendants)
        
        {a, b, b^3, a^2b, b^2a, aba}
        
        {a, b, a^2b, b^2a, aba, a^2(b^2)a}
        
        {a, b, a^2b, b^2a, aba, ab(a^2)b}
        
        {a, b, a^2b, b^2a, aba, ababa}
        
        {a, b, a^2b, b^2a, aba, b^2(a^2)b}
        
        {a, b, a^2b, b^2a, aba, b^2aba}
      - {a, b, b^3, a^2b, aba} (4 descendants)
        
        {a, b, b^3, a^2b, a^2(b^3), aba}
        
        {a, b, b^3, a^2b, aba, ab(a^2)b}
        
        {a, b, b^3, a^2b, aba, ababa}
        
        {a, b, b^3, b^5, a^2b, aba}
      - {a, b, a^2b, aba, ab(a^2)b} (1 descendant)
        
        {a, b, a^2b, aba, ab(a^2)b, ababa}
      - {a, b, a^2b, aba, ababa} (1 descendant)
        
        {a, b, a^2b, aba, ababa, abababa}
    - {a, b, a(b^2), a^2b} (4 descendants)
      - {a, b, a(b^2), b(a^2), a^2b} (7 descendants)
        
        {a, b, a(b^2), b(a^2), a^2b, bab}
        
        {a, b, a(b^2), b(a^2), a^2b, b^2a}
        
        {a, b, b^3, a(b^2), b(a^2), a^2b}
        
        {a, b, a(b^2), b(a^2), a^2b, a^2b(a^2)}
        
        {a, b, a(b^2), b(a^2), a^2b, a(b^2)(a^2)}
        
        {a, b, a(b^2), b(a^2), a^2b, b(a^3)b}
        
        {a, b, a(b^2), b(a^2), a^2b, b(a^2)(b^2)}
      - {a, b, a(b^2), a^2b, bab} (5 descendants)
        
        {a, b, a(b^2), a^2b, b^2a, bab}
        
        {a, b, b^3, a(b^2), a^2b, bab}
        
        {a, b, a(b^2), a^2b, bab, a^2bab}
        
        {a, b, a(b^2), a^2b, bab, a(b^2)ab}
        
        {a, b, a(b^2), a^2b, bab, babab}
      - {a, b, a(b^2), a^2b, b^2a} (5 descendants)
        
        {a, b, b^3, a(b^2), a^2b, b^2a}
        
        {a, b, a(b^2), a^2b, b^2a, a^2(b^2)a}
        
        {a, b, a(b^2), a^2b, b^2a, a(b^3)a}
        
        {a, b, a(b^2), a^2b, b^2a, b^2(a^2)b}
        
        {a, b, a(b^2), a^2b, b^2a, b^2a(b^2)}
      - {a, b, b^3, a(b^2), a^2b} (3 descendants)
        
        {a, b, b^3, a(b^2), a^2b, a^2(b^3)}
        
        {a, b, b^3, a(b^2), a(b^4), a^2b}
        
        {a, b, b^3, b^5, a(b^2), a^2b}
    - {a, b, b(a^2), a^2b} (5 descendants)
      - {a, b, b(a^2), a^2b, bab} (7 descendants)
        
        {a, b, b(a^2), a^2b, b^2a, bab}
        
        {a, b, b^3, b(a^2), a^2b, bab}
        
        {a, b, b(a^2), a^2b, bab, a^2b(a^2)}
        
        {a, b, b(a^2), a^2b, bab, a^2bab}
        
        {a, b, b(a^2), a^2b, bab, b(a^3)b}
        
        {a, b, b(a^2), a^2b, bab, bab(a^2)}
        
        {a, b, b(a^2), a^2b, bab, babab}
      - {a, b, b(a^2), a^2b, b^2a} (5 descendants)
        
        {a, b, b^3, b(a^2), a^2b, b^2a}
        
        {a, b, b(a^2), a^2b, b^2a, a^2b(a^2)}
        
        {a, b, b(a^2), a^2b, b^2a, a^2(b^2)a}
        
        {a, b, b(a^2), a^2b, b^2a, b(a^3)b}
        
        {a, b, b(a^2), a^2b, b^2a, b^2(a^2)b}
      - {a, b, b^3, b(a^2), a^2b} (5 descendants)
        
        {a, b, b^3, b(a^2), a^2b, a^2b(a^2)}
        
        {a, b, b^3, b(a^2), a^2b, a^2(b^3)}
        
        {a, b, b^3, b(a^2), a^2b, b(a^3)b}
        
        {a, b, b^3, b(a^2), a^2b, b^3(a^2)}
        
        {a, b, b^3, b^5, b(a^2), a^2b}
      - {a, b, b(a^2), a^2b, a^2b(a^2)} (1 descendant)
        
        {a, b, b(a^2), a^2b, b(a^3)b, a^2b(a^2)}
      - {a, b, b(a^2), a^2b, b(a^3)b} (0 descendants)
    - {a, b, a^2b, bab} (4 descendants)
      - {a, b, a^2b, b^2a, bab} (6 descendants)
        
        {a, b, b^3, a^2b, b^2a, bab}
        
        {a, b, a^2b, b^2a, bab, a^2bab}
        
        {a, b, a^2b, b^2a, bab, a^2(b^2)a}
        
        {a, b, a^2b, b^2a, bab, babab}
        
        {a, b, a^2b, b^2a, bab, ba(b^2)a}
        
        {a, b, a^2b, b^2a, bab, b^2(a^2)b}
      - {a, b, b^3, a^2b, bab} (6 descendants)
        
        {a, b, b^3, a^2b, bab, a^2bab}
        
        {a, b, b^3, a^2b, a^2(b^3), bab}
        
        {a, b, b^3, a^2b, bab, babab}
        
        {a, b, b^3, a^2b, bab, ba(b^3)}
        
        {a, b, b^3, a^2b, bab, b^3ab}
        
        {a, b, b^3, b^5, a^2b, bab}
      - {a, b, a^2b, bab, a^2bab} (1 descendant)
        
        {a, b, a^2b, bab, a^2bab, babab}
      - {a, b, a^2b, bab, babab} (1 descendant)
        
        {a, b, a^2b, bab, babab, bababab}
    - {a, b, a^2b, b^2a} (3 descendants)
      - {a, b, b^3, a^2b, b^2a} (5 descendants)
        
        {a, b, b^3, a^2b, b^2a, a^2(b^2)a}
        
        {a, b, b^3, a^2b, a^2(b^3), b^2a}
        
        {a, b, b^3, a^2b, b^2a, b^2(a^2)b}
        
        {a, b, b^3, a^2b, b^2a, b^4a}
        
        {a, b, b^3, b^5, a^2b, b^2a}
      - {a, b, a^2b, b^2a, a^2(b^2)a} (1 descendant)
        
        {a, b, a^2b, b^2a, a^2(b^2)a, b^2(a^2)b}
      - {a, b, a^2b, b^2a, b^2(a^2)b} (0 descendants)
    - {a, b, b^3, a^2b} (2 descendants)
      - {a, b, b^3, a^2b, a^2(b^3)} (1 descendant)
        
        {a, b, b^3, b^5, a^2b, a^2(b^3)}
      - {a, b, b^3, b^5, a^2b} (1 descendant)
        
        {a, b, b^3, b^5, b^7, a^2b}
  - {a, b, aba} (6 descendants)
    - {a, b, a(b^2), aba} (6 descendants)
      - {a, b, a(b^2), b(a^2), aba} (8 descendants)
        
        {a, b, a(b^2), b(a^2), aba, bab}
        
        {a, b, a(b^2), b(a^2), b^2a, aba}
        
        {a, b, b^3, a(b^2), b(a^2), aba}
        
        {a, b, a(b^2), b(a^2), aba, ababa}
        
        {a, b, a(b^2), b(a^2), aba, aba(b^2)}
        
        {a, b, a(b^2), b(a^2), aba, a(b^2)(a^2)}
        
        {a, b, a(b^2), b(a^2), aba, b(a^2)ba}
        
        {a, b, a(b^2), b(a^2), aba, b(a^2)(b^2)}
      - {a, b, a(b^2), aba, bab} (6 descendants)
        
        {a, b, a(b^2), b^2a, aba, bab}
        
        {a, b, b^3, a(b^2), aba, bab}
        
        {a, b, a(b^2), aba, bab, ababa}
        
        {a, b, a(b^2), aba, bab, aba(b^2)}
        
        {a, b, a(b^2), aba, bab, a(b^2)ab}
        
        {a, b, a(b^2), aba, bab, babab}
      - {a, b, a(b^2), b^2a, aba} (6 descendants)
        
        {a, b, b^3, a(b^2), b^2a, aba}
        
        {a, b, a(b^2), b^2a, aba, ababa}
        
        {a, b, a(b^2), b^2a, aba, aba(b^2)}
        
        {a, b, a(b^2), b^2a, aba, a(b^3)a}
        
        {a, b, a(b^2), b^2a, aba, b^2aba}
        
        {a, b, a(b^2), b^2a, aba, b^2a(b^2)}
      - {a, b, b^3, a(b^2), aba} (4 descendants)
        
        {a, b, b^3, a(b^2), aba, ababa}
        
        {a, b, b^3, a(b^2), aba, aba(b^2)}
        
        {a, b, b^3, a(b^2), a(b^4), aba}
        
        {a, b, b^3, b^5, a(b^2), aba}
      - {a, b, a(b^2), aba, ababa} (2 descendants)
        
        {a, b, a(b^2), aba, aba(b^2), ababa}
        
        {a, b, a(b^2), aba, ababa, abababa}
      - {a, b, a(b^2), aba, aba(b^2)} (0 descendants)
    - {a, b, b(a^2), aba} (5 descendants)
      - {a, b, b(a^2), aba, bab} (6 descendants)
        
        {a, b, b(a^2), b^2a, aba, bab}
        
        {a, b, b^3, b(a^2), aba, bab}
        
        {a, b, b(a^2), aba, bab, ababa}
        
        {a, b, b(a^2), aba, bab, b(a^2)ba}
        
        {a, b, b(a^2), aba, bab, bab(a^2)}
        
        {a, b, b(a^2), aba, bab, babab}
      - {a, b, b(a^2), b^2a, aba} (4 descendants)
        
        {a, b, b^3, b(a^2), b^2a, aba}
        
        {a, b, b(a^2), b^2a, aba, ababa}
        
        {a, b, b(a^2), b^2a, aba, b(a^2)ba}
        
        {a, b, b(a^2), b^2a, aba, b^2aba}
      - {a, b, b^3, b(a^2), aba} (4 descendants)
        
        {a, b, b^3, b(a^2), aba, ababa}
        
        {a, b, b^3, b(a^2), aba, b(a^2)ba}
        
        {a, b, b^3, b(a^2), b^3(a^2), aba}
        
        {a, b, b^3, b^5, b(a^2), aba}
      - {a, b, b(a^2), aba, ababa} (2 descendants)
        
        {a, b, b(a^2), aba, b(a^2)ba, ababa}
        
        {a, b, b(a^2), aba, ababa, abababa}
      - {a, b, b(a^2), aba, b(a^2)ba} (0 descendants)
    - {a, b, aba, bab} (4 descendants)
      - {a, b, b^2a, aba, bab} (5 descendants)
        
        {a, b, b^3, b^2a, aba, bab}
        
        {a, b, b^2a, aba, bab, ababa}
        
        {a, b, b^2a, aba, bab, babab}
        
        {a, b, b^2a, aba, bab, ba(b^2)a}
        
        {a, b, b^2a, aba, bab, b^2aba}
      - {a, b, b^3, aba, bab} (5 descendants)
        
        {a, b, b^3, aba, bab, ababa}
        
        {a, b, b^3, aba, bab, babab}
        
        {a, b, b^3, aba, bab, ba(b^3)}
        
        {a, b, b^3, aba, bab, b^3ab}
        
        {a, b, b^3, b^5, aba, bab}
      - {a, b, aba, bab, ababa} (2 descendants)
        
        {a, b, aba, bab, ababa, babab}
        
        {a, b, aba, bab, ababa, abababa}
      - {a, b, aba, bab, babab} (1 descendant)
        
        {a, b, aba, bab, babab, bababab}
    - {a, b, b^2a, aba} (3 descendants)
      - {a, b, b^3, b^2a, aba} (4 descendants)
        
        {a, b, b^3, b^2a, aba, ababa}
        
        {a, b, b^3, b^2a, aba, b^2aba}
        
        {a, b, b^3, b^2a, b^4a, aba}
        
        {a, b, b^3, b^5, b^2a, aba}
      - {a, b, b^2a, aba, ababa} (2 descendants)
        
        {a, b, b^2a, aba, b^2aba, ababa}
        
        {a, b, b^2a, aba, ababa, abababa}
      - {a, b, b^2a, aba, b^2aba} (0 descendants)
    - {a, b, b^3, aba} (2 descendants)
      - {a, b, b^3, aba, ababa} (2 descendants)
        
        {a, b, b^3, b^5, aba, ababa}
        
        {a, b, b^3, aba, ababa, abababa}
      - {a, b, b^3, b^5, aba} (1 descendant)
        
        {a, b, b^3, b^5, b^7, aba}
    - {a, b, aba, ababa} (1 descendant)
      - {a, b, aba, ababa, abababa} (1 descendant)
        
        {a, b, aba, ababa, abababa, ababababa}
  - {a, b, a(b^2)} (4 descendants)
    - {a, b, a(b^2), b(a^2)} (5 descendants)
      - {a, b, a(b^2), b(a^2), bab} (7 descendants)
        
        {a, b, a(b^2), b(a^2), b^2a, bab}
        
        {a, b, b^3, a(b^2), b(a^2), bab}
        
        {a, b, a(b^2), b(a^2), a(b^2)(a^2), bab}
        
        {a, b, a(b^2), b(a^2), bab, a(b^2)ab}
        
        {a, b, a(b^2), b(a^2), bab, b(a^2)(b^2)}
        
        {a, b, a(b^2), b(a^2), bab, bab(a^2)}
        
        {a, b, a(b^2), b(a^2), bab, babab}
      - {a, b, a(b^2), b(a^2), b^2a} (5 descendants)
        
        {a, b, b^3, a(b^2), b(a^2), b^2a}
        
        {a, b, a(b^2), b(a^2), b^2a, a(b^2)(a^2)}
        
        {a, b, a(b^2), b(a^2), b^2a, a(b^3)a}
        
        {a, b, a(b^2), b(a^2), b^2a, b(a^2)(b^2)}
        
        {a, b, a(b^2), b(a^2), b^2a, b^2a(b^2)}
      - {a, b, b^3, a(b^2), b(a^2)} (5 descendants)
        
        {a, b, b^3, a(b^2), b(a^2), a(b^2)(a^2)}
        
        {a, b, b^3, a(b^2), a(b^4), b(a^2)}
        
        {a, b, b^3, a(b^2), b(a^2), b(a^2)(b^2)}
        
        {a, b, b^3, a(b^2), b(a^2), b^3(a^2)}
        
        {a, b, b^3, b^5, a(b^2), b(a^2)}
      - {a, b, a(b^2), b(a^2), a(b^2)(a^2)} (1 descendant)
        
        {a, b, a(b^2), b(a^2), a(b^2)(a^2), b(a^2)(b^2)}
      - {a, b, a(b^2), b(a^2), b(a^2)(b^2)} (0 descendants)
    - {a, b, a(b^2), bab} (4 descendants)
      - {a, b, a(b^2), b^2a, bab} (6 descendants)
        
        {a, b, b^3, a(b^2), b^2a, bab}
        
        {a, b, a(b^2), b^2a, bab, a(b^2)ab}
        
        {a, b, a(b^2), b^2a, a(b^3)a, bab}
        
        {a, b, a(b^2), b^2a, bab, babab}
        
        {a, b, a(b^2), b^2a, bab, ba(b^2)a}
        
        {a, b, a(b^2), b^2a, bab, b^2a(b^2)}
      - {a, b, b^3, a(b^2), bab} (6 descendants)
        
        {a, b, b^3, a(b^2), bab, a(b^2)ab}
        
        {a, b, b^3, a(b^2), a(b^4), bab}
        
        {a, b, b^3, a(b^2), bab, babab}
        
        {a, b, b^3, a(b^2), bab, ba(b^3)}
        
        {a, b, b^3, a(b^2), bab, b^3ab}
        
        {a, b, b^3, b^5, a(b^2), bab}
      - {a, b, a(b^2), bab, a(b^2)ab} (1 descendant)
        
        {a, b, a(b^2), bab, a(b^2)ab, babab}
      - {a, b, a(b^2), bab, babab} (1 descendant)
        
        {a, b, a(b^2), bab, babab, bababab}
    - {a, b, a(b^2), b^2a} (3 descendants)
      - {a, b, b^3, a(b^2), b^2a} (5 descendants)
        
        {a, b, b^3, a(b^2), b^2a, a(b^3)a}
        
        {a, b, b^3, a(b^2), a(b^4), b^2a}
        
        {a, b, b^3, a(b^2), b^2a, b^2a(b^2)}
        
        {a, b, b^3, a(b^2), b^2a, b^4a}
        
        {a, b, b^3, b^5, a(b^2), b^2a}
      - {a, b, a(b^2), b^2a, a(b^3)a} (1 descendant)
        
        {a, b, a(b^2), b^2a, a(b^3)a, b^2a(b^2)}
      - {a, b, a(b^2), b^2a, b^2a(b^2)} (0 descendants)
    - {a, b, b^3, a(b^2)} (2 descendants)
      - {a, b, b^3, a(b^2), a(b^4)} (1 descendant)
        
        {a, b, b^3, b^5, a(b^2), a(b^4)}
      - {a, b, b^3, b^5, a(b^2)} (1 descendant)
        
        {a, b, b^3, b^5, b^7, a(b^2)}
  - {a, b, b(a^2)} (3 descendants)
    - {a, b, b(a^2), bab} (4 descendants)
      - {a, b, b(a^2), b^2a, bab} (4 descendants)
        
        {a, b, b^3, b(a^2), b^2a, bab}
        
        {a, b, b(a^2), b^2a, bab, bab(a^2)}
        
        {a, b, b(a^2), b^2a, bab, babab}
        
        {a, b, b(a^2), b^2a, bab, ba(b^2)a}
      - {a, b, b^3, b(a^2), bab} (6 descendants)
        
        {a, b, b^3, b(a^2), bab, bab(a^2)}
        
        {a, b, b^3, b(a^2), bab, babab}
        
        {a, b, b^3, b(a^2), bab, ba(b^3)}
        
        {a, b, b^3, b(a^2), b^3(a^2), bab}
        
        {a, b, b^3, b(a^2), bab, b^3ab}
        
        {a, b, b^3, b^5, b(a^2), bab}
      - {a, b, b(a^2), bab, bab(a^2)} (1 descendant)
        
        {a, b, b(a^2), bab, bab(a^2), babab}
      - {a, b, b(a^2), bab, babab} (1 descendant)
        
        {a, b, b(a^2), bab, babab, bababab}
    - {a, b, b(a^2), b^2a} (1 descendant)
      - {a, b, b^3, b(a^2), b^2a} (3 descendants)
        
        {a, b, b^3, b(a^2), b^2a, b^3(a^2)}
        
        {a, b, b^3, b(a^2), b^2a, b^4a}
        
        {a, b, b^3, b^5, b(a^2), b^2a}
    - {a, b, b^3, b(a^2)} (2 descendants)
      - {a, b, b^3, b(a^2), b^3(a^2)} (1 descendant)
        
        {a, b, b^3, b^5, b(a^2), b^3(a^2)}
      - {a, b, b^3, b^5, b(a^2)} (1 descendant)
        
        {a, b, b^3, b^5, b^7, b(a^2)}
  - {a, b, bab} (3 descendants)
    - {a, b, b^2a, bab} (3 descendants)
      - {a, b, b^3, b^2a, bab} (6 descendants)
        
        {a, b, b^3, b^2a, bab, babab}
        
        {a, b, b^3, b^2a, bab, ba(b^2)a}
        
        {a, b, b^3, b^2a, bab, ba(b^3)}
        
        {a, b, b^3, b^2a, bab, b^3ab}
        
        {a, b, b^3, b^2a, b^4a, bab}
        
        {a, b, b^3, b^5, b^2a, bab}
      - {a, b, b^2a, bab, babab} (2 descendants)
        
        {a, b, b^2a, bab, ba(b^2)a, babab}
        
        {a, b, b^2a, bab, babab, bababab}
      - {a, b, b^2a, bab, ba(b^2)a} (0 descendants)
    - {a, b, b^3, bab} (4 descendants)
      - {a, b, b^3, bab, babab} (4 descendants)
        
        {a, b, b^3, bab, ba(b^3), babab}
        
        {a, b, b^3, bab, b^3ab, babab}
        
        {a, b, b^3, b^5, bab, babab}
        
        {a, b, b^3, bab, babab, bababab}
      - {a, b, b^3, bab, ba(b^3)} (2 descendants)
        
        {a, b, b^3, bab, ba(b^3), b^3ab}
        
        {a, b, b^3, b^5, bab, ba(b^3)}
      - {a, b, b^3, bab, b^3ab} (1 descendant)
        
        {a, b, b^3, b^5, bab, b^3ab}
      - {a, b, b^3, b^5, bab} (1 descendant)
        
        {a, b, b^3, b^5, b^7, bab}
    - {a, b, bab, babab} (1 descendant)
      - {a, b, bab, babab, bababab} (1 descendant)
        
        {a, b, bab, babab, bababab, babababab}
  - {a, b, b^2a} (1 descendant)
    - {a, b, b^3, b^2a} (2 descendants)
      - {a, b, b^3, b^2a, b^4a} (1 descendant)
        
        {a, b, b^3, b^5, b^2a, b^4a}
      - {a, b, b^3, b^5, b^2a} (1 descendant)
        
        {a, b, b^3, b^5, b^7, b^2a}
  - {a, b, b^3} (1 descendant)
    - {a, b, b^3, b^5} (1 descendant)
      - {a, b, b^3, b^5, b^7} (1 descendant)
        
        {a, b, b^3, b^5, b^7, b^9}
- {a, a^2} (11 descendants)
  - {a, a^2, ab} (14 descendants)
    - {a, a^2, ab, ba} (19 descendants)
      - {a, a^2, a^3, ab, ba} (29 descendants)
        
        {a, a^2, a^3, ab, ba, a^2b}
        
        {a, a^2, a^3, ab, ba, aba}
        
        {a, a^2, a^3, ab, a(b^2), ba}
        
        {a, a^2, a^3, ab, ba, b(a^2)}
        
        {a, a^2, a^3, ab, ba, bab}
        
        {a, a^2, a^3, ab, ba, b^2a}
        
        {a, a^2, a^3, a^4, ab, ba}
        
        {a, a^2, a^3, ab, ba, a^3b}
        
        {a, a^2, a^3, ab, ba, a^2ba}
        
        {a, a^2, a^3, ab, ba, ab(a^2)}
        
        {a, a^2, a^3, ab, ba, a(b^2)a}
        
        {a, a^2, a^3, ab, ba, b(a^3)}
        
        {a, a^2, a^3, a^5, ab, ba}
        
        {a, a^2, a^3, ab, ba, a^3ba}
        
        {a, a^2, a^3, ab, ba, a^2b(a^2)}
        
        {a, a^2, a^3, ab, ba, a^2(b^2)a}
        
        {a, a^2, a^3, ab, ba, ab(a^3)}
        
        {a, a^2, a^3, ab, ba, ababa}
        
        {a, a^2, a^3, ab, ba, a(b^2)(a^2)}
        
        {a, a^2, a^3, ab, ba, a(b^3)a}
        
        {a, a^2, a^3, a^6, ab, ba}
        
        {a, a^2, a^3, ab, ba, a^4ba}
        
        {a, a^2, a^3, ab, ba, a^3b(a^2)}
        
        {a, a^2, a^3, ab, ba, a^3(b^2)a}
        
        {a, a^2, a^3, ab, ba, a^2b(a^3)}
        
        {a, a^2, a^3, ab, ba, ab(a^4)}
        
        {a, a^2, a^3, ab, ba, a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, ab, ba}
        
        {a, a^2, a^3, ab, ba, a^3b(a^3)}
      - {a, a^2, ab, ba, a^2b} (22 descendants)
        
        {a, a^2, ab, ba, a^2b, aba}
        
        {a, a^2, ab, a(b^2), ba, a^2b}
        
        {a, a^2, ab, ba, b(a^2), a^2b}
        
        {a, a^2, ab, ba, a^2b, bab}
        
        {a, a^2, ab, ba, a^2b, b^2a}
        
        {a, a^2, a^4, ab, ba, a^2b}
        
        {a, a^2, ab, ba, a^2b, a^2ba}
        
        {a, a^2, ab, ba, a^2b, a^2(b^2)}
        
        {a, a^2, ab, ba, a^2b, ab(a^2)}
        
        {a, a^2, ab, ba, a^2b, a(b^2)a}
        
        {a, a^2, a^5, ab, ba, a^2b}
        
        {a, a^2, ab, ba, a^2b, a^3ba}
        
        {a, a^2, ab, ba, a^2b, a^2b(a^2)}
        
        {a, a^2, ab, ba, a^2b, a^2(b^2)a}
        
        {a, a^2, ab, ba, a^2b, ab(a^3)}
        
        {a, a^2, ab, ba, a^2b, ababa}
        
        {a, a^2, ab, ba, a^2b, a(b^2)(a^2)}
        
        {a, a^2, ab, ba, a^2b, a(b^3)a}
        
        {a, a^2, ab, ba, a^2b, a^2b(a^3)}
        
        {a, a^2, ab, ba, a^2b, a^2baba}
        
        {a, a^2, ab, ba, a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, ab, ba, a^2b, a^2(b^3)a}
      - {a, a^2, ab, ba, aba} (27 descendants)
        
        {a, a^2, ab, a(b^2), ba, aba}
        
        {a, a^2, ab, ba, b(a^2), aba}
        
        {a, a^2, ab, ba, aba, bab}
        
        {a, a^2, ab, ba, b^2a, aba}
        
        {a, a^2, a^4, ab, ba, aba}
        
        {a, a^2, ab, ba, aba, a^2ba}
        
        {a, a^2, ab, ba, aba, ab(a^2)}
        
        {a, a^2, ab, ba, aba, abab}
        
        {a, a^2, ab, ba, aba, a(b^2)a}
        
        {a, a^2, ab, ba, aba, baba}
        
        {a, a^2, a^5, ab, ba, aba}
        
        {a, a^2, ab, ba, aba, a^3ba}
        
        {a, a^2, ab, ba, aba, a^2b(a^2)}
        
        {a, a^2, ab, ba, aba, a^2(b^2)a}
        
        {a, a^2, ab, ba, aba, ab(a^3)}
        
        {a, a^2, ab, ba, aba, ababa}
        
        {a, a^2, ab, ba, aba, a(b^2)(a^2)}
        
        {a, a^2, ab, ba, aba, a(b^3)a}
        
        {a, a^2, ab, ba, aba, a^4ba}
        
        {a, a^2, ab, ba, aba, a^2baba}
        
        {a, a^2, ab, ba, aba, ab(a^4)}
        
        {a, a^2, ab, ba, aba, ab(a^2)ba}
        
        {a, a^2, ab, ba, aba, abab(a^2)}
        
        {a, a^2, ab, ba, aba, aba(b^2)a}
        
        {a, a^2, ab, ba, aba, a(b^2)aba}
        
        {a, a^2, ab, ba, aba, ab(a^3)ba}
        
        {a, a^2, ab, ba, aba, abababa}
      - {a, a^2, ab, a(b^2), ba} (20 descendants)
        
        {a, a^2, ab, a(b^2), ba, b(a^2)}
        
        {a, a^2, ab, a(b^2), ba, bab}
        
        {a, a^2, ab, a(b^2), ba, b^2a}
        
        {a, a^2, a^4, ab, a(b^2), ba}
        
        {a, a^2, ab, a(b^2), ba, a^2ba}
        
        {a, a^2, ab, a(b^2), ba, ab(a^2)}
        
        {a, a^2, ab, a(b^2), ba, a(b^2)a}
        
        {a, a^2, ab, a(b^2), a(b^3), ba}
        
        {a, a^2, a^5, ab, a(b^2), ba}
        
        {a, a^2, ab, a(b^2), ba, a^3ba}
        
        {a, a^2, ab, a(b^2), ba, a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), ba, a^2(b^2)a}
        
        {a, a^2, ab, a(b^2), ba, ab(a^3)}
        
        {a, a^2, ab, a(b^2), ba, ababa}
        
        {a, a^2, ab, a(b^2), ba, a(b^2)(a^2)}
        
        {a, a^2, ab, a(b^2), ba, a(b^3)a}
        
        {a, a^2, ab, a(b^2), ba, a(b^2)(a^3)}
        
        {a, a^2, ab, a(b^2), ba, a(b^2)aba}
        
        {a, a^2, ab, a(b^2), ba, a(b^3)(a^2)}
        
        {a, a^2, ab, a(b^2), ba, a(b^4)a}
      - {a, a^2, ab, ba, b(a^2)} (19 descendants)
        
        {a, a^2, ab, ba, b(a^2), bab}
        
        {a, a^2, ab, ba, b(a^2), b^2a}
        
        {a, a^2, a^4, ab, ba, b(a^2)}
        
        {a, a^2, ab, ba, b(a^2), a^2ba}
        
        {a, a^2, ab, ba, b(a^2), ab(a^2)}
        
        {a, a^2, ab, ba, b(a^2), a(b^2)a}
        
        {a, a^2, ab, ba, b(a^2), b^2(a^2)}
        
        {a, a^2, a^5, ab, ba, b(a^2)}
        
        {a, a^2, ab, ba, b(a^2), a^3ba}
        
        {a, a^2, ab, ba, b(a^2), a^2b(a^2)}
        
        {a, a^2, ab, ba, b(a^2), a^2(b^2)a}
        
        {a, a^2, ab, ba, b(a^2), ab(a^3)}
        
        {a, a^2, ab, ba, b(a^2), ababa}
        
        {a, a^2, ab, ba, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, ab, ba, b(a^2), a(b^3)a}
        
        {a, a^2, ab, ba, b(a^2), a^3b(a^2)}
        
        {a, a^2, ab, ba, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ab, ba, b(a^2), abab(a^2)}
        
        {a, a^2, ab, ba, b(a^2), a(b^3)(a^2)}
      - {a, a^2, ab, ba, bab} (13 descendants)
        
        {a, a^2, ab, ba, b^2a, bab}
        
        {a, a^2, a^4, ab, ba, bab}
        
        {a, a^2, ab, ba, bab, a^2ba}
        
        {a, a^2, ab, ba, ab(a^2), bab}
        
        {a, a^2, ab, ba, a(b^2)a, bab}
        
        {a, a^2, a^5, ab, ba, bab}
        
        {a, a^2, ab, ba, bab, a^3ba}
        
        {a, a^2, ab, ba, bab, a^2b(a^2)}
        
        {a, a^2, ab, ba, bab, a^2(b^2)a}
        
        {a, a^2, ab, ba, ab(a^3), bab}
        
        {a, a^2, ab, ba, bab, ababa}
        
        {a, a^2, ab, ba, a(b^2)(a^2), bab}
        
        {a, a^2, ab, ba, a(b^3)a, bab}
      - {a, a^2, ab, ba, b^2a} (17 descendants)
        
        {a, a^2, a^4, ab, ba, b^2a}
        
        {a, a^2, ab, ba, b^2a, a^2ba}
        
        {a, a^2, ab, ba, b^2a, ab(a^2)}
        
        {a, a^2, ab, ba, b^2a, a(b^2)a}
        
        {a, a^2, ab, ba, b^2a, b^3a}
        
        {a, a^2, a^5, ab, ba, b^2a}
        
        {a, a^2, ab, ba, b^2a, a^3ba}
        
        {a, a^2, ab, ba, b^2a, a^2b(a^2)}
        
        {a, a^2, ab, ba, b^2a, a^2(b^2)a}
        
        {a, a^2, ab, ba, b^2a, ab(a^3)}
        
        {a, a^2, ab, ba, b^2a, ababa}
        
        {a, a^2, ab, ba, b^2a, a(b^2)(a^2)}
        
        {a, a^2, ab, ba, b^2a, a(b^3)a}
        
        {a, a^2, ab, ba, b^2a, a^3(b^2)a}
        
        {a, a^2, ab, ba, b^2a, a^2(b^3)a}
        
        {a, a^2, ab, ba, b^2a, aba(b^2)a}
        
        {a, a^2, ab, ba, b^2a, a(b^4)a}
      - {a, a^2, a^4, ab, ba} (14 descendants)
        
        {a, a^2, a^4, ab, ba, a^2ba}
        
        {a, a^2, a^4, ab, ba, ab(a^2)}
        
        {a, a^2, a^4, ab, ba, a(b^2)a}
        
        {a, a^2, a^4, a^5, ab, ba}
        
        {a, a^2, a^4, ab, ba, a^4b}
        
        {a, a^2, a^4, ab, ba, a^3ba}
        
        {a, a^2, a^4, ab, ba, a^2b(a^2)}
        
        {a, a^2, a^4, ab, ba, a^2(b^2)a}
        
        {a, a^2, a^4, ab, ba, ab(a^3)}
        
        {a, a^2, a^4, ab, ba, ababa}
        
        {a, a^2, a^4, ab, ba, a(b^2)(a^2)}
        
        {a, a^2, a^4, ab, ba, a(b^3)a}
        
        {a, a^2, a^4, ab, ba, b(a^4)}
        
        {a, a^2, a^4, a^7, ab, ba}
      - {a, a^2, ab, ba, a^2ba} (13 descendants)
        
        {a, a^2, ab, ba, ab(a^2), a^2ba}
        
        {a, a^2, ab, ba, a(b^2)a, a^2ba}
        
        {a, a^2, a^5, ab, ba, a^2ba}
        
        {a, a^2, ab, ba, a^2ba, a^3ba}
        
        {a, a^2, ab, ba, a^2ba, a^2b(a^2)}
        
        {a, a^2, ab, ba, a^2ba, a^2bab}
        
        {a, a^2, ab, ba, a^2ba, a^2(b^2)a}
        
        {a, a^2, ab, ba, ab(a^3), a^2ba}
        
        {a, a^2, ab, ba, a^2ba, ababa}
        
        {a, a^2, ab, ba, a(b^2)(a^2), a^2ba}
        
        {a, a^2, ab, ba, a(b^3)a, a^2ba}
        
        {a, a^2, ab, ba, a^2ba, b(a^2)ba}
        
        {a, a^2, ab, ba, a^2ba, a^2b(a^2)ba}
      - {a, a^2, ab, ba, ab(a^2)} (12 descendants)
        
        {a, a^2, ab, ba, ab(a^2), a(b^2)a}
        
        {a, a^2, a^5, ab, ba, ab(a^2)}
        
        {a, a^2, ab, ba, ab(a^2), a^3ba}
        
        {a, a^2, ab, ba, ab(a^2), a^2b(a^2)}
        
        {a, a^2, ab, ba, ab(a^2), a^2(b^2)a}
        
        {a, a^2, ab, ba, ab(a^2), ab(a^3)}
        
        {a, a^2, ab, ba, ab(a^2), ab(a^2)b}
        
        {a, a^2, ab, ba, ab(a^2), ababa}
        
        {a, a^2, ab, ba, ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, ab, ba, ab(a^2), a(b^3)a}
        
        {a, a^2, ab, ba, ab(a^2), bab(a^2)}
        
        {a, a^2, ab, ba, ab(a^2), ab(a^2)b(a^2)}
      - {a, a^2, ab, ba, a(b^2)a} (11 descendants)
        
        {a, a^2, a^5, ab, ba, a(b^2)a}
        
        {a, a^2, ab, ba, a(b^2)a, a^3ba}
        
        {a, a^2, ab, ba, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ab, ba, a(b^2)a, a^2(b^2)a}
        
        {a, a^2, ab, ba, ab(a^3), a(b^2)a}
        
        {a, a^2, ab, ba, a(b^2)a, ababa}
        
        {a, a^2, ab, ba, a(b^2)a, a(b^2)(a^2)}
        
        {a, a^2, ab, ba, a(b^2)a, a(b^2)ab}
        
        {a, a^2, ab, ba, a(b^2)a, a(b^3)a}
        
        {a, a^2, ab, ba, a(b^2)a, ba(b^2)a}
        
        {a, a^2, ab, ba, a(b^2)a, a(b^2)a(b^2)a}
      - {a, a^2, a^5, ab, ba} (7 descendants)
        
        {a, a^2, a^5, ab, ba, a^3ba}
        
        {a, a^2, a^5, ab, ba, a^2b(a^2)}
        
        {a, a^2, a^5, ab, ba, a^2(b^2)a}
        
        {a, a^2, a^5, ab, ba, ab(a^3)}
        
        {a, a^2, a^5, ab, ba, ababa}
        
        {a, a^2, a^5, ab, ba, a(b^2)(a^2)}
        
        {a, a^2, a^5, ab, ba, a(b^3)a}
      - {a, a^2, ab, ba, a^3ba} (6 descendants)
        
        {a, a^2, ab, ba, a^2b(a^2), a^3ba}
        
        {a, a^2, ab, ba, a^2(b^2)a, a^3ba}
        
        {a, a^2, ab, ba, ab(a^3), a^3ba}
        
        {a, a^2, ab, ba, a^3ba, ababa}
        
        {a, a^2, ab, ba, a(b^2)(a^2), a^3ba}
        
        {a, a^2, ab, ba, a(b^3)a, a^3ba}
      - {a, a^2, ab, ba, a^2b(a^2)} (5 descendants)
        
        {a, a^2, ab, ba, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, ab, ba, ab(a^3), a^2b(a^2)}
        
        {a, a^2, ab, ba, a^2b(a^2), ababa}
        
        {a, a^2, ab, ba, a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, ab, ba, a(b^3)a, a^2b(a^2)}
      - {a, a^2, ab, ba, a^2(b^2)a} (4 descendants)
        
        {a, a^2, ab, ba, ab(a^3), a^2(b^2)a}
        
        {a, a^2, ab, ba, a^2(b^2)a, ababa}
        
        {a, a^2, ab, ba, a(b^2)(a^2), a^2(b^2)a}
        
        {a, a^2, ab, ba, a(b^3)a, a^2(b^2)a}
      - {a, a^2, ab, ba, ab(a^3)} (3 descendants)
        
        {a, a^2, ab, ba, ab(a^3), ababa}
        
        {a, a^2, ab, ba, ab(a^3), a(b^2)(a^2)}
        
        {a, a^2, ab, ba, ab(a^3), a(b^3)a}
      - {a, a^2, ab, ba, ababa} (2 descendants)
        
        {a, a^2, ab, ba, a(b^2)(a^2), ababa}
        
        {a, a^2, ab, ba, a(b^3)a, ababa}
      - {a, a^2, ab, ba, a(b^2)(a^2)} (1 descendant)
        
        {a, a^2, ab, ba, a(b^2)(a^2), a(b^3)a}
      - {a, a^2, ab, ba, a(b^3)a} (0 descendants)
    - {a, a^2, a^3, ab} (22 descendants)
      - {a, a^2, a^3, ab, a^2b} (26 descendants)
        
        {a, a^2, a^3, ab, a^2b, aba}
        
        {a, a^2, a^3, ab, a(b^2), a^2b}
        
        {a, a^2, a^3, ab, b(a^2), a^2b}
        
        {a, a^2, a^3, a^4, ab, a^2b}
        
        {a, a^2, a^3, ab, a^2b, a^3b}
        
        {a, a^2, a^3, ab, a^2b, a^2ba}
        
        {a, a^2, a^3, ab, a^2b, a^2(b^2)}
        
        {a, a^2, a^3, ab, a^2b, ab(a^2)}
        
        {a, a^2, a^3, ab, a^2b, a(b^2)a}
        
        {a, a^2, a^3, ab, b(a^3), a^2b}
        
        {a, a^2, a^3, a^5, ab, a^2b}
        
        {a, a^2, a^3, ab, a^2b, a^3ba}
        
        {a, a^2, a^3, ab, a^2b, a^2b(a^2)}
        
        {a, a^2, a^3, ab, a^2b, a^2(b^2)a}
        
        {a, a^2, a^3, ab, a^2b, ab(a^3)}
        
        {a, a^2, a^3, ab, a^2b, a(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, ab, a^2b}
        
        {a, a^2, a^3, ab, a^2b, a^3b(a^2)}
        
        {a, a^2, a^3, ab, a^2b, a^2b(a^3)}
        
        {a, a^2, a^3, ab, a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, ab, a^2b, ab(a^4)}
        
        {a, a^2, a^3, ab, a^2b, a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, ab, a^2b}
        
        {a, a^2, a^3, ab, a^2b, a^3b(a^3)}
        
        {a, a^2, a^3, ab, a^2b, a^2b(a^4)}
        
        {a, a^2, a^3, ab, a^2b, a^2(b^2)(a^3)}
      - {a, a^2, a^3, ab, aba} (25 descendants)
        
        {a, a^2, a^3, ab, a(b^2), aba}
        
        {a, a^2, a^3, ab, b(a^2), aba}
        
        {a, a^2, a^3, a^4, ab, aba}
        
        {a, a^2, a^3, ab, a^3b, aba}
        
        {a, a^2, a^3, ab, aba, a^2ba}
        
        {a, a^2, a^3, ab, aba, ab(a^2)}
        
        {a, a^2, a^3, ab, aba, abab}
        
        {a, a^2, a^3, ab, aba, a(b^2)a}
        
        {a, a^2, a^3, ab, b(a^3), aba}
        
        {a, a^2, a^3, a^5, ab, aba}
        
        {a, a^2, a^3, ab, aba, a^3ba}
        
        {a, a^2, a^3, ab, aba, a^2b(a^2)}
        
        {a, a^2, a^3, ab, aba, ab(a^3)}
        
        {a, a^2, a^3, ab, aba, ababa}
        
        {a, a^2, a^3, ab, aba, a(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, ab, aba}
        
        {a, a^2, a^3, ab, aba, a^3b(a^2)}
        
        {a, a^2, a^3, ab, aba, a^2b(a^3)}
        
        {a, a^2, a^3, ab, aba, ab(a^4)}
        
        {a, a^2, a^3, ab, aba, abab(a^2)}
        
        {a, a^2, a^3, ab, aba, a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, ab, aba}
        
        {a, a^2, a^3, ab, aba, a^3b(a^3)}
        
        {a, a^2, a^3, ab, aba, ab(a^5)}
        
        {a, a^2, a^3, ab, aba, abab(a^3)}
      - {a, a^2, a^3, ab, a(b^2)} (24 descendants)
        
        {a, a^2, a^3, ab, a(b^2), b(a^2)}
        
        {a, a^2, a^3, a^4, ab, a(b^2)}
        
        {a, a^2, a^3, ab, a(b^2), a^3b}
        
        {a, a^2, a^3, ab, a(b^2), a^2ba}
        
        {a, a^2, a^3, ab, a(b^2), ab(a^2)}
        
        {a, a^2, a^3, ab, a(b^2), a(b^2)a}
        
        {a, a^2, a^3, ab, a(b^2), a(b^3)}
        
        {a, a^2, a^3, ab, a(b^2), b(a^3)}
        
        {a, a^2, a^3, a^5, ab, a(b^2)}
        
        {a, a^2, a^3, ab, a(b^2), a^3ba}
        
        {a, a^2, a^3, ab, a(b^2), a^2b(a^2)}
        
        {a, a^2, a^3, ab, a(b^2), ab(a^3)}
        
        {a, a^2, a^3, ab, a(b^2), a(b^2)(a^2)}
        
        {a, a^2, a^3, ab, a(b^2), a(b^3)a}
        
        {a, a^2, a^3, a^6, ab, a(b^2)}
        
        {a, a^2, a^3, ab, a(b^2), a^3b(a^2)}
        
        {a, a^2, a^3, ab, a(b^2), a^2b(a^3)}
        
        {a, a^2, a^3, ab, a(b^2), ab(a^4)}
        
        {a, a^2, a^3, ab, a(b^2), a(b^2)(a^3)}
        
        {a, a^2, a^3, ab, a(b^2), a(b^3)(a^2)}
        
        {a, a^2, a^3, a^7, ab, a(b^2)}
        
        {a, a^2, a^3, ab, a(b^2), a^3b(a^3)}
        
        {a, a^2, a^3, ab, a(b^2), a(b^2)(a^4)}
        
        {a, a^2, a^3, ab, a(b^2), a(b^3)(a^3)}
      - {a, a^2, a^3, ab, b(a^2)} (24 descendants)
        
        {a, a^2, a^3, a^4, ab, b(a^2)}
        
        {a, a^2, a^3, ab, b(a^2), a^3b}
        
        {a, a^2, a^3, ab, b(a^2), a^2ba}
        
        {a, a^2, a^3, ab, b(a^2), ab(a^2)}
        
        {a, a^2, a^3, ab, b(a^2), a(b^2)a}
        
        {a, a^2, a^3, ab, b(a^2), b(a^3)}
        
        {a, a^2, a^3, ab, b(a^2), b^2(a^2)}
        
        {a, a^2, a^3, a^5, ab, b(a^2)}
        
        {a, a^2, a^3, ab, b(a^2), a^3ba}
        
        {a, a^2, a^3, ab, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, ab, b(a^2), ab(a^3)}
        
        {a, a^2, a^3, ab, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, ab, b(a^2)}
        
        {a, a^2, a^3, ab, b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, ab, b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, ab, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, ab, b(a^2), ab(a^4)}
        
        {a, a^2, a^3, ab, b(a^2), abab(a^2)}
        
        {a, a^2, a^3, ab, b(a^2), a(b^2)(a^3)}
        
        {a, a^2, a^3, ab, b(a^2), a(b^3)(a^2)}
        
        {a, a^2, a^3, a^7, ab, b(a^2)}
        
        {a, a^2, a^3, ab, b(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, ab, b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, ab, b(a^2), a^3(b^2)(a^2)}
      - {a, a^2, a^3, a^4, ab} (29 descendants)
        
        {a, a^2, a^3, a^4, ab, a^3b}
        
        {a, a^2, a^3, a^4, ab, a^2ba}
        
        {a, a^2, a^3, a^4, ab, ab(a^2)}
        
        {a, a^2, a^3, a^4, ab, a(b^2)a}
        
        {a, a^2, a^3, a^4, ab, b(a^3)}
        
        {a, a^2, a^3, a^4, a^5, ab}
        
        {a, a^2, a^3, a^4, ab, a^4b}
        
        {a, a^2, a^3, a^4, ab, a^3ba}
        
        {a, a^2, a^3, a^4, ab, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, ab, ab(a^3)}
        
        {a, a^2, a^3, a^4, ab, a(b^2)(a^2)}
        
        {a, a^2, a^3, a^4, ab, b(a^4)}
        
        {a, a^2, a^3, a^4, a^6, ab}
        
        {a, a^2, a^3, a^4, ab, a^4ba}
        
        {a, a^2, a^3, a^4, ab, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, ab, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, ab, ab(a^4)}
        
        {a, a^2, a^3, a^4, ab, a(b^2)(a^3)}
        
        {a, a^2, a^3, a^4, a^7, ab}
        
        {a, a^2, a^3, a^4, ab, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, ab, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, ab, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, ab, ab(a^5)}
        
        {a, a^2, a^3, a^4, ab, a(b^2)(a^4)}
        
        {a, a^2, a^3, a^4, a^8, ab}
        
        {a, a^2, a^3, a^4, ab, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, ab, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, ab}
        
        {a, a^2, a^3, a^4, ab, a^4b(a^4)}
      - {a, a^2, a^3, ab, a^3b} (21 descendants)
        
        {a, a^2, a^3, ab, a^3b, a^2ba}
        
        {a, a^2, a^3, ab, a^3b, ab(a^2)}
        
        {a, a^2, a^3, ab, a^3b, a(b^2)a}
        
        {a, a^2, a^3, ab, b(a^3), a^3b}
        
        {a, a^2, a^3, a^5, ab, a^3b}
        
        {a, a^2, a^3, ab, a^3b, a^3ba}
        
        {a, a^2, a^3, ab, a^3b, a^3(b^2)}
        
        {a, a^2, a^3, ab, a^3b, a^2b(a^2)}
        
        {a, a^2, a^3, ab, a^3b, ab(a^3)}
        
        {a, a^2, a^3, ab, a^3b, a(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, ab, a^3b}
        
        {a, a^2, a^3, ab, a^3b, a^3b(a^2)}
        
        {a, a^2, a^3, ab, a^3b, a^3(b^2)a}
        
        {a, a^2, a^3, ab, a^3b, a^2b(a^3)}
        
        {a, a^2, a^3, ab, a^3b, ab(a^4)}
        
        {a, a^2, a^3, ab, a^3b, a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, ab, a^3b}
        
        {a, a^2, a^3, ab, a^3b, a^3b(a^3)}
        
        {a, a^2, a^3, ab, a^3b, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, ab, a^3b, a^3b(a^4)}
        
        {a, a^2, a^3, ab, a^3b, a^3(b^2)(a^3)}
      - {a, a^2, a^3, ab, a^2ba} (16 descendants)
        
        {a, a^2, a^3, ab, ab(a^2), a^2ba}
        
        {a, a^2, a^3, ab, a(b^2)a, a^2ba}
        
        {a, a^2, a^3, ab, b(a^3), a^2ba}
        
        {a, a^2, a^3, a^5, ab, a^2ba}
        
        {a, a^2, a^3, ab, a^2ba, a^3ba}
        
        {a, a^2, a^3, ab, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, ab, a^2ba, a^2bab}
        
        {a, a^2, a^3, ab, ab(a^3), a^2ba}
        
        {a, a^2, a^3, ab, a(b^2)(a^2), a^2ba}
        
        {a, a^2, a^3, a^6, ab, a^2ba}
        
        {a, a^2, a^3, ab, a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, ab, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, ab, ab(a^4), a^2ba}
        
        {a, a^2, a^3, ab, a(b^2)(a^3), a^2ba}
        
        {a, a^2, a^3, a^7, ab, a^2ba}
        
        {a, a^2, a^3, ab, a^2ba, a^3b(a^3)}
      - {a, a^2, a^3, ab, ab(a^2)} (16 descendants)
        
        {a, a^2, a^3, ab, ab(a^2), a(b^2)a}
        
        {a, a^2, a^3, ab, b(a^3), ab(a^2)}
        
        {a, a^2, a^3, a^5, ab, ab(a^2)}
        
        {a, a^2, a^3, ab, ab(a^2), a^3ba}
        
        {a, a^2, a^3, ab, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, ab, ab(a^2), ab(a^3)}
        
        {a, a^2, a^3, ab, ab(a^2), ab(a^2)b}
        
        {a, a^2, a^3, ab, ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, ab, ab(a^2)}
        
        {a, a^2, a^3, ab, ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, ab, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, ab, ab(a^2), ab(a^4)}
        
        {a, a^2, a^3, ab, ab(a^2), a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, ab, ab(a^2)}
        
        {a, a^2, a^3, ab, ab(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, ab, ab(a^2), ab(a^2)b(a^2)}
      - {a, a^2, a^3, ab, a(b^2)a} (14 descendants)
        
        {a, a^2, a^3, ab, b(a^3), a(b^2)a}
        
        {a, a^2, a^3, a^5, ab, a(b^2)a}
        
        {a, a^2, a^3, ab, a(b^2)a, a^3ba}
        
        {a, a^2, a^3, ab, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, a^3, ab, ab(a^3), a(b^2)a}
        
        {a, a^2, a^3, ab, a(b^2)a, a(b^2)(a^2)}
        
        {a, a^2, a^3, ab, a(b^2)a, a(b^2)ab}
        
        {a, a^2, a^3, a^6, ab, a(b^2)a}
        
        {a, a^2, a^3, ab, a(b^2)a, a^3b(a^2)}
        
        {a, a^2, a^3, ab, a(b^2)a, a^2b(a^3)}
        
        {a, a^2, a^3, ab, ab(a^4), a(b^2)a}
        
        {a, a^2, a^3, ab, a(b^2)a, a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, ab, a(b^2)a}
        
        {a, a^2, a^3, ab, a(b^2)a, a^3b(a^3)}
      - {a, a^2, a^3, ab, b(a^3)} (18 descendants)
        
        {a, a^2, a^3, a^5, ab, b(a^3)}
        
        {a, a^2, a^3, ab, b(a^3), a^3ba}
        
        {a, a^2, a^3, ab, b(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, ab, b(a^3), ab(a^3)}
        
        {a, a^2, a^3, ab, b(a^3), a(b^2)(a^2)}
        
        {a, a^2, a^3, ab, b(a^3), b^2(a^3)}
        
        {a, a^2, a^3, a^6, ab, b(a^3)}
        
        {a, a^2, a^3, ab, b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, ab, b(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, ab, b(a^3), ab(a^4)}
        
        {a, a^2, a^3, ab, b(a^3), a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, ab, b(a^3)}
        
        {a, a^2, a^3, ab, b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, ab, b(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, ab, b(a^3), abab(a^3)}
        
        {a, a^2, a^3, ab, b(a^3), a(b^3)(a^3)}
        
        {a, a^2, a^3, ab, b(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, ab, b(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^5, ab} (13 descendants)
        
        {a, a^2, a^3, a^5, ab, a^3ba}
        
        {a, a^2, a^3, a^5, ab, a^2b(a^2)}
        
        {a, a^2, a^3, a^5, ab, ab(a^3)}
        
        {a, a^2, a^3, a^5, ab, a(b^2)(a^2)}
        
        {a, a^2, a^3, a^5, a^6, ab}
        
        {a, a^2, a^3, a^5, ab, a^5b}
        
        {a, a^2, a^3, a^5, ab, a^3b(a^2)}
        
        {a, a^2, a^3, a^5, ab, a^2b(a^3)}
        
        {a, a^2, a^3, a^5, ab, ab(a^4)}
        
        {a, a^2, a^3, a^5, ab, a(b^2)(a^3)}
        
        {a, a^2, a^3, a^5, a^7, ab}
        
        {a, a^2, a^3, a^5, ab, a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^9, ab}
      - {a, a^2, a^3, ab, a^3ba} (11 descendants)
        
        {a, a^2, a^3, ab, a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, ab, ab(a^3), a^3ba}
        
        {a, a^2, a^3, ab, a(b^2)(a^2), a^3ba}
        
        {a, a^2, a^3, a^6, ab, a^3ba}
        
        {a, a^2, a^3, ab, a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, ab, a^3ba, a^3bab}
        
        {a, a^2, a^3, ab, a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, ab, ab(a^4), a^3ba}
        
        {a, a^2, a^3, ab, a(b^2)(a^3), a^3ba}
        
        {a, a^2, a^3, a^7, ab, a^3ba}
        
        {a, a^2, a^3, ab, a^3ba, a^3b(a^3)}
      - {a, a^2, a^3, ab, a^2b(a^2)} (9 descendants)
        
        {a, a^2, a^3, ab, ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, ab, a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, a^6, ab, a^2b(a^2)}
        
        {a, a^2, a^3, ab, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, ab, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, ab, ab(a^4), a^2b(a^2)}
        
        {a, a^2, a^3, ab, a(b^2)(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, a^7, ab, a^2b(a^2)}
        
        {a, a^2, a^3, ab, a^2b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, ab, ab(a^3)} (8 descendants)
        
        {a, a^2, a^3, ab, ab(a^3), a(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, ab, ab(a^3)}
        
        {a, a^2, a^3, ab, ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, ab, ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, ab, ab(a^3), ab(a^4)}
        
        {a, a^2, a^3, ab, ab(a^3), a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, ab, ab(a^3)}
        
        {a, a^2, a^3, ab, ab(a^3), a^3b(a^3)}
      - {a, a^2, a^3, ab, a(b^2)(a^2)} (7 descendants)
        
        {a, a^2, a^3, a^6, ab, a(b^2)(a^2)}
        
        {a, a^2, a^3, ab, a(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, ab, a(b^2)(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, ab, ab(a^4), a(b^2)(a^2)}
        
        {a, a^2, a^3, ab, a(b^2)(a^2), a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, ab, a(b^2)(a^2)}
        
        {a, a^2, a^3, ab, a(b^2)(a^2), a^3b(a^3)}
      - {a, a^2, a^3, a^6, ab} (6 descendants)
        
        {a, a^2, a^3, a^6, ab, a^3b(a^2)}
        
        {a, a^2, a^3, a^6, ab, a^2b(a^3)}
        
        {a, a^2, a^3, a^6, ab, ab(a^4)}
        
        {a, a^2, a^3, a^6, ab, a(b^2)(a^3)}
        
        {a, a^2, a^3, a^6, a^7, ab}
        
        {a, a^2, a^3, a^6, ab, a^3b(a^3)}
      - {a, a^2, a^3, ab, a^3b(a^2)} (5 descendants)
        
        {a, a^2, a^3, ab, a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, ab, ab(a^4), a^3b(a^2)}
        
        {a, a^2, a^3, ab, a(b^2)(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^7, ab, a^3b(a^2)}
        
        {a, a^2, a^3, ab, a^3b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, ab, a^2b(a^3)} (4 descendants)
        
        {a, a^2, a^3, ab, ab(a^4), a^2b(a^3)}
        
        {a, a^2, a^3, ab, a(b^2)(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, ab, a^2b(a^3)}
        
        {a, a^2, a^3, ab, a^2b(a^3), a^3b(a^3)}
      - {a, a^2, a^3, ab, ab(a^4)} (3 descendants)
        
        {a, a^2, a^3, ab, ab(a^4), a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, ab, ab(a^4)}
        
        {a, a^2, a^3, ab, ab(a^4), a^3b(a^3)}
      - {a, a^2, a^3, ab, a(b^2)(a^3)} (2 descendants)
        
        {a, a^2, a^3, a^7, ab, a(b^2)(a^3)}
        
        {a, a^2, a^3, ab, a(b^2)(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^7, ab} (1 descendant)
        
        {a, a^2, a^3, a^7, ab, a^3b(a^3)}
      - {a, a^2, a^3, ab, a^3b(a^3)} (0 descendants)
    - {a, a^2, ab, a^2b} (15 descendants)
      - {a, a^2, ab, a^2b, aba} (18 descendants)
        
        {a, a^2, ab, a(b^2), a^2b, aba}
        
        {a, a^2, ab, b(a^2), a^2b, aba}
        
        {a, a^2, a^4, ab, a^2b, aba}
        
        {a, a^2, ab, a^2b, aba, a^2ba}
        
        {a, a^2, ab, a^2b, a^2(b^2), aba}
        
        {a, a^2, ab, a^2b, aba, ab(a^2)}
        
        {a, a^2, ab, a^2b, aba, abab}
        
        {a, a^2, ab, a^2b, aba, a(b^2)a}
        
        {a, a^2, a^5, ab, a^2b, aba}
        
        {a, a^2, ab, a^2b, aba, a^2b(a^2)}
        
        {a, a^2, ab, a^2b, aba, a^2(b^2)a}
        
        {a, a^2, ab, a^2b, aba, ab(a^3)}
        
        {a, a^2, ab, a^2b, aba, ababa}
        
        {a, a^2, ab, a^2b, aba, a(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, aba, a^2b(a^3)}
        
        {a, a^2, ab, a^2b, aba, a^2(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, aba, ab(a^4)}
        
        {a, a^2, ab, a^2b, aba, abab(a^2)}
      - {a, a^2, ab, a(b^2), a^2b} (17 descendants)
        
        {a, a^2, ab, a(b^2), b(a^2), a^2b}
        
        {a, a^2, a^4, ab, a(b^2), a^2b}
        
        {a, a^2, ab, a(b^2), a^2b, a^2ba}
        
        {a, a^2, ab, a(b^2), a^2b, a^2(b^2)}
        
        {a, a^2, ab, a(b^2), a^2b, ab(a^2)}
        
        {a, a^2, ab, a(b^2), a^2b, a(b^2)a}
        
        {a, a^2, ab, a(b^2), a(b^3), a^2b}
        
        {a, a^2, a^5, ab, a(b^2), a^2b}
        
        {a, a^2, ab, a(b^2), a^2b, a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), a^2b, a^2(b^2)a}
        
        {a, a^2, ab, a(b^2), a^2b, ab(a^3)}
        
        {a, a^2, ab, a(b^2), a^2b, a(b^2)(a^2)}
        
        {a, a^2, ab, a(b^2), a^2b, a(b^3)a}
        
        {a, a^2, ab, a(b^2), a^2b, a^2b(a^3)}
        
        {a, a^2, ab, a(b^2), a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, ab, a(b^2), a^2b, a(b^2)(a^3)}
        
        {a, a^2, ab, a(b^2), a^2b, a(b^3)(a^2)}
      - {a, a^2, ab, b(a^2), a^2b} (19 descendants)
        
        {a, a^2, a^4, ab, b(a^2), a^2b}
        
        {a, a^2, ab, b(a^2), a^2b, a^2ba}
        
        {a, a^2, ab, b(a^2), a^2b, a^2(b^2)}
        
        {a, a^2, ab, b(a^2), a^2b, ab(a^2)}
        
        {a, a^2, ab, b(a^2), a^2b, a(b^2)a}
        
        {a, a^2, ab, b(a^2), a^2b, b(a^2)b}
        
        {a, a^2, ab, b(a^2), a^2b, b^2(a^2)}
        
        {a, a^2, a^5, ab, b(a^2), a^2b}
        
        {a, a^2, ab, b(a^2), a^2b, a^2b(a^2)}
        
        {a, a^2, ab, b(a^2), a^2b, a^2(b^2)a}
        
        {a, a^2, ab, b(a^2), a^2b, ab(a^3)}
        
        {a, a^2, ab, b(a^2), a^2b, a(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), a^2b, a^3b(a^2)}
        
        {a, a^2, ab, b(a^2), a^2b, a^2b(a^3)}
        
        {a, a^2, ab, b(a^2), a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), a^2b, abab(a^2)}
        
        {a, a^2, ab, b(a^2), a^2b, a(b^3)(a^2)}
        
        {a, a^2, ab, b(a^2), a^2b, a^2bab(a^2)}
        
        {a, a^2, ab, b(a^2), a^2b, a^2(b^3)(a^2)}
      - {a, a^2, a^4, ab, a^2b} (13 descendants)
        
        {a, a^2, a^4, ab, a^2b, a^2ba}
        
        {a, a^2, a^4, ab, a^2b, a^2(b^2)}
        
        {a, a^2, a^4, ab, a^2b, ab(a^2)}
        
        {a, a^2, a^4, ab, a^2b, a(b^2)a}
        
        {a, a^2, a^4, a^5, ab, a^2b}
        
        {a, a^2, a^4, ab, a^2b, a^4b}
        
        {a, a^2, a^4, ab, a^2b, a^2b(a^2)}
        
        {a, a^2, a^4, ab, a^2b, a^2(b^2)a}
        
        {a, a^2, a^4, ab, a^2b, ab(a^3)}
        
        {a, a^2, a^4, ab, a^2b, a(b^2)(a^2)}
        
        {a, a^2, a^4, ab, a^2b, a^2b(a^3)}
        
        {a, a^2, a^4, ab, a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, ab, a^2b}
      - {a, a^2, ab, a^2b, a^2ba} (14 descendants)
        
        {a, a^2, ab, a^2b, a^2(b^2), a^2ba}
        
        {a, a^2, ab, a^2b, ab(a^2), a^2ba}
        
        {a, a^2, ab, a^2b, a(b^2)a, a^2ba}
        
        {a, a^2, a^5, ab, a^2b, a^2ba}
        
        {a, a^2, ab, a^2b, a^2ba, a^2b(a^2)}
        
        {a, a^2, ab, a^2b, a^2ba, a^2bab}
        
        {a, a^2, ab, a^2b, a^2ba, a^2(b^2)a}
        
        {a, a^2, ab, a^2b, ab(a^3), a^2ba}
        
        {a, a^2, ab, a^2b, a(b^2)(a^2), a^2ba}
        
        {a, a^2, ab, a^2b, a^2ba, a^2b(a^3)}
        
        {a, a^2, ab, a^2b, a^2ba, a^2baba}
        
        {a, a^2, ab, a^2b, a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, a^2ba, a^2b(a^4)}
        
        {a, a^2, ab, a^2b, a^2ba, a^2bab(a^2)}
      - {a, a^2, ab, a^2b, a^2(b^2)} (13 descendants)
        
        {a, a^2, ab, a^2b, a^2(b^2), ab(a^2)}
        
        {a, a^2, ab, a^2b, a^2(b^2), a(b^2)a}
        
        {a, a^2, a^5, ab, a^2b, a^2(b^2)}
        
        {a, a^2, ab, a^2b, a^2(b^2), a^2b(a^2)}
        
        {a, a^2, ab, a^2b, a^2(b^2), a^2(b^2)a}
        
        {a, a^2, ab, a^2b, a^2(b^2), a^2(b^3)}
        
        {a, a^2, ab, a^2b, a^2(b^2), ab(a^3)}
        
        {a, a^2, ab, a^2b, a^2(b^2), a(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, a^2(b^2), a^2b(a^3)}
        
        {a, a^2, ab, a^2b, a^2(b^2), a^2(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, a^2(b^2), a^2(b^3)a}
        
        {a, a^2, ab, a^2b, a^2(b^2), a^2(b^2)(a^3)}
        
        {a, a^2, ab, a^2b, a^2(b^2), a^2(b^3)(a^2)}
      - {a, a^2, ab, a^2b, ab(a^2)} (10 descendants)
        
        {a, a^2, ab, a^2b, ab(a^2), a(b^2)a}
        
        {a, a^2, a^5, ab, a^2b, ab(a^2)}
        
        {a, a^2, ab, a^2b, ab(a^2), a^2b(a^2)}
        
        {a, a^2, ab, a^2b, ab(a^2), a^2(b^2)a}
        
        {a, a^2, ab, a^2b, ab(a^2), ab(a^3)}
        
        {a, a^2, ab, a^2b, ab(a^2), ab(a^2)b}
        
        {a, a^2, ab, a^2b, ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, ab(a^2), a^2b(a^3)}
        
        {a, a^2, ab, a^2b, ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, ab(a^2), ab(a^2)b(a^2)}
      - {a, a^2, ab, a^2b, a(b^2)a} (8 descendants)
        
        {a, a^2, a^5, ab, a^2b, a(b^2)a}
        
        {a, a^2, ab, a^2b, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ab, a^2b, a(b^2)a, a^2(b^2)a}
        
        {a, a^2, ab, a^2b, ab(a^3), a(b^2)a}
        
        {a, a^2, ab, a^2b, a(b^2)a, a(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, a(b^2)a, a(b^2)ab}
        
        {a, a^2, ab, a^2b, a(b^2)a, a^2b(a^3)}
        
        {a, a^2, ab, a^2b, a(b^2)a, a^2(b^2)(a^2)}
      - {a, a^2, a^5, ab, a^2b} (7 descendants)
        
        {a, a^2, a^5, ab, a^2b, a^2b(a^2)}
        
        {a, a^2, a^5, ab, a^2b, a^2(b^2)a}
        
        {a, a^2, a^5, ab, a^2b, ab(a^3)}
        
        {a, a^2, a^5, ab, a^2b, a(b^2)(a^2)}
        
        {a, a^2, a^5, ab, a^2b, a^5b}
        
        {a, a^2, a^5, ab, a^2b, a^2b(a^3)}
        
        {a, a^2, a^5, ab, a^2b, a^2(b^2)(a^2)}
      - {a, a^2, ab, a^2b, a^2b(a^2)} (6 descendants)
        
        {a, a^2, ab, a^2b, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, ab, a^2b, ab(a^3), a^2b(a^2)}
        
        {a, a^2, ab, a^2b, a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, ab, a^2b, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, ab, a^2b, a^2b(a^2), a^2b(a^2)b}
        
        {a, a^2, ab, a^2b, a^2b(a^2), a^2(b^2)(a^2)}
      - {a, a^2, ab, a^2b, a^2(b^2)a} (5 descendants)
        
        {a, a^2, ab, a^2b, ab(a^3), a^2(b^2)a}
        
        {a, a^2, ab, a^2b, a(b^2)(a^2), a^2(b^2)a}
        
        {a, a^2, ab, a^2b, a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, ab, a^2b, a^2(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, a^2(b^2)a, a^2(b^2)ab}
      - {a, a^2, ab, a^2b, ab(a^3)} (4 descendants)
        
        {a, a^2, ab, a^2b, ab(a^3), a(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, ab(a^3), a^2b(a^3)}
        
        {a, a^2, ab, a^2b, ab(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, ab(a^3), ab(a^3)b}
      - {a, a^2, ab, a^2b, a(b^2)(a^2)} (3 descendants)
        
        {a, a^2, ab, a^2b, a(b^2)(a^2), a^2b(a^3)}
        
        {a, a^2, ab, a^2b, a(b^2)(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, a(b^2)(a^2), a(b^2)(a^2)b}
      - {a, a^2, ab, a^2b, a^2b(a^3)} (2 descendants)
        
        {a, a^2, ab, a^2b, a^2b(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, ab, a^2b, a^2b(a^3), a^2b(a^3)b}
      - {a, a^2, ab, a^2b, a^2(b^2)(a^2)} (1 descendant)
        
        {a, a^2, ab, a^2b, a^2(b^2)(a^2), a^2(b^2)(a^2)b}
    - {a, a^2, ab, aba} (14 descendants)
      - {a, a^2, ab, a(b^2), aba} (17 descendants)
        
        {a, a^2, ab, a(b^2), b(a^2), aba}
        
        {a, a^2, a^4, ab, a(b^2), aba}
        
        {a, a^2, ab, a(b^2), aba, a^2ba}
        
        {a, a^2, ab, a(b^2), aba, ab(a^2)}
        
        {a, a^2, ab, a(b^2), aba, abab}
        
        {a, a^2, ab, a(b^2), aba, a(b^2)a}
        
        {a, a^2, ab, a(b^2), a(b^3), aba}
        
        {a, a^2, a^5, ab, a(b^2), aba}
        
        {a, a^2, ab, a(b^2), aba, a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), aba, ab(a^3)}
        
        {a, a^2, ab, a(b^2), aba, ababa}
        
        {a, a^2, ab, a(b^2), aba, a(b^2)(a^2)}
        
        {a, a^2, ab, a(b^2), aba, a(b^3)a}
        
        {a, a^2, ab, a(b^2), aba, ab(a^4)}
        
        {a, a^2, ab, a(b^2), aba, abab(a^2)}
        
        {a, a^2, ab, a(b^2), aba, a(b^2)(a^3)}
        
        {a, a^2, ab, a(b^2), aba, a(b^3)(a^2)}
      - {a, a^2, ab, b(a^2), aba} (18 descendants)
        
        {a, a^2, a^4, ab, b(a^2), aba}
        
        {a, a^2, ab, b(a^2), aba, a^2ba}
        
        {a, a^2, ab, b(a^2), aba, ab(a^2)}
        
        {a, a^2, ab, b(a^2), aba, abab}
        
        {a, a^2, ab, b(a^2), aba, a(b^2)a}
        
        {a, a^2, ab, b(a^2), b^2(a^2), aba}
        
        {a, a^2, a^5, ab, b(a^2), aba}
        
        {a, a^2, ab, b(a^2), aba, a^2b(a^2)}
        
        {a, a^2, ab, b(a^2), aba, ab(a^3)}
        
        {a, a^2, ab, b(a^2), aba, ababa}
        
        {a, a^2, ab, b(a^2), aba, a(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), aba, a^3b(a^2)}
        
        {a, a^2, ab, b(a^2), aba, a^2(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), aba, ab(a^4)}
        
        {a, a^2, ab, b(a^2), aba, abab(a^2)}
        
        {a, a^2, ab, b(a^2), aba, a(b^3)(a^2)}
        
        {a, a^2, ab, b(a^2), aba, ab(a^2)b(a^2)}
        
        {a, a^2, ab, b(a^2), aba, aba(b^2)(a^2)}
      - {a, a^2, a^4, ab, aba} (14 descendants)
        
        {a, a^2, a^4, ab, aba, a^2ba}
        
        {a, a^2, a^4, ab, aba, ab(a^2)}
        
        {a, a^2, a^4, ab, aba, abab}
        
        {a, a^2, a^4, ab, aba, a(b^2)a}
        
        {a, a^2, a^4, a^5, ab, aba}
        
        {a, a^2, a^4, ab, a^4b, aba}
        
        {a, a^2, a^4, ab, aba, a^2b(a^2)}
        
        {a, a^2, a^4, ab, aba, ab(a^3)}
        
        {a, a^2, a^4, ab, aba, ababa}
        
        {a, a^2, a^4, ab, aba, a(b^2)(a^2)}
        
        {a, a^2, a^4, ab, aba, a^4ba}
        
        {a, a^2, a^4, ab, aba, ab(a^4)}
        
        {a, a^2, a^4, ab, aba, abab(a^2)}
        
        {a, a^2, a^4, a^7, ab, aba}
      - {a, a^2, ab, aba, a^2ba} (12 descendants)
        
        {a, a^2, ab, aba, ab(a^2), a^2ba}
        
        {a, a^2, ab, aba, a^2ba, abab}
        
        {a, a^2, ab, aba, a(b^2)a, a^2ba}
        
        {a, a^2, a^5, ab, aba, a^2ba}
        
        {a, a^2, ab, aba, a^2ba, a^2b(a^2)}
        
        {a, a^2, ab, aba, a^2ba, a^2bab}
        
        {a, a^2, ab, aba, ab(a^3), a^2ba}
        
        {a, a^2, ab, aba, a^2ba, ababa}
        
        {a, a^2, ab, aba, a(b^2)(a^2), a^2ba}
        
        {a, a^2, ab, aba, a^2ba, a^2baba}
        
        {a, a^2, ab, aba, ab(a^4), a^2ba}
        
        {a, a^2, ab, aba, a^2ba, abab(a^2)}
      - {a, a^2, ab, aba, ab(a^2)} (13 descendants)
        
        {a, a^2, ab, aba, ab(a^2), abab}
        
        {a, a^2, ab, aba, ab(a^2), a(b^2)a}
        
        {a, a^2, a^5, ab, aba, ab(a^2)}
        
        {a, a^2, ab, aba, ab(a^2), a^2b(a^2)}
        
        {a, a^2, ab, aba, ab(a^2), ab(a^3)}
        
        {a, a^2, ab, aba, ab(a^2), ab(a^2)b}
        
        {a, a^2, ab, aba, ab(a^2), ababa}
        
        {a, a^2, ab, aba, ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, ab, aba, ab(a^2), ab(a^4)}
        
        {a, a^2, ab, aba, ab(a^2), ab(a^2)ba}
        
        {a, a^2, ab, aba, ab(a^2), abab(a^2)}
        
        {a, a^2, ab, aba, ab(a^2), ab(a^5)}
        
        {a, a^2, ab, aba, ab(a^2), ab(a^2)b(a^2)}
      - {a, a^2, ab, aba, abab} (12 descendants)
        
        {a, a^2, ab, aba, a(b^2)a, abab}
        
        {a, a^2, a^5, ab, aba, abab}
        
        {a, a^2, ab, aba, a^2b(a^2), abab}
        
        {a, a^2, ab, aba, ab(a^3), abab}
        
        {a, a^2, ab, aba, abab, ababa}
        
        {a, a^2, ab, aba, abab, aba(b^2)}
        
        {a, a^2, ab, aba, a(b^2)(a^2), abab}
        
        {a, a^2, ab, aba, ab(a^4), abab}
        
        {a, a^2, ab, aba, abab, abab(a^2)}
        
        {a, a^2, ab, aba, abab, aba(b^2)a}
        
        {a, a^2, ab, aba, abab, abab(a^3)}
        
        {a, a^2, ab, aba, abab, aba(b^2)(a^2)}
      - {a, a^2, ab, aba, a(b^2)a} (9 descendants)
        
        {a, a^2, a^5, ab, aba, a(b^2)a}
        
        {a, a^2, ab, aba, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ab, aba, ab(a^3), a(b^2)a}
        
        {a, a^2, ab, aba, a(b^2)a, ababa}
        
        {a, a^2, ab, aba, a(b^2)a, a(b^2)(a^2)}
        
        {a, a^2, ab, aba, a(b^2)a, a(b^2)ab}
        
        {a, a^2, ab, aba, ab(a^4), a(b^2)a}
        
        {a, a^2, ab, aba, a(b^2)a, abab(a^2)}
        
        {a, a^2, ab, aba, a(b^2)a, a(b^2)aba}
      - {a, a^2, a^5, ab, aba} (6 descendants)
        
        {a, a^2, a^5, ab, aba, a^2b(a^2)}
        
        {a, a^2, a^5, ab, aba, ab(a^3)}
        
        {a, a^2, a^5, ab, aba, ababa}
        
        {a, a^2, a^5, ab, aba, a(b^2)(a^2)}
        
        {a, a^2, a^5, ab, aba, ab(a^4)}
        
        {a, a^2, a^5, ab, aba, abab(a^2)}
      - {a, a^2, ab, aba, a^2b(a^2)} (5 descendants)
        
        {a, a^2, ab, aba, ab(a^3), a^2b(a^2)}
        
        {a, a^2, ab, aba, a^2b(a^2), ababa}
        
        {a, a^2, ab, aba, a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, ab, aba, ab(a^4), a^2b(a^2)}
        
        {a, a^2, ab, aba, a^2b(a^2), abab(a^2)}
      - {a, a^2, ab, aba, ab(a^3)} (6 descendants)
        
        {a, a^2, ab, aba, ab(a^3), ababa}
        
        {a, a^2, ab, aba, ab(a^3), a(b^2)(a^2)}
        
        {a, a^2, ab, aba, ab(a^3), ab(a^4)}
        
        {a, a^2, ab, aba, ab(a^3), ab(a^3)b}
        
        {a, a^2, ab, aba, ab(a^3), abab(a^2)}
        
        {a, a^2, ab, aba, ab(a^3), ab(a^3)ba}
      - {a, a^2, ab, aba, ababa} (5 descendants)
        
        {a, a^2, ab, aba, a(b^2)(a^2), ababa}
        
        {a, a^2, ab, aba, ab(a^4), ababa}
        
        {a, a^2, ab, aba, ababa, abab(a^2)}
        
        {a, a^2, ab, aba, ababa, ababab}
        
        {a, a^2, ab, aba, ababa, abababa}
      - {a, a^2, ab, aba, a(b^2)(a^2)} (2 descendants)
        
        {a, a^2, ab, aba, ab(a^4), a(b^2)(a^2)}
        
        {a, a^2, ab, aba, a(b^2)(a^2), abab(a^2)}
      - {a, a^2, ab, aba, ab(a^4)} (1 descendant)
        
        {a, a^2, ab, aba, ab(a^4), abab(a^2)}
      - {a, a^2, ab, aba, abab(a^2)} (0 descendants)
    - {a, a^2, ab, a(b^2)} (13 descendants)
      - {a, a^2, ab, a(b^2), b(a^2)} (18 descendants)
        
        {a, a^2, a^4, ab, a(b^2), b(a^2)}
        
        {a, a^2, ab, a(b^2), b(a^2), a^2ba}
        
        {a, a^2, ab, a(b^2), b(a^2), ab(a^2)}
        
        {a, a^2, ab, a(b^2), b(a^2), a(b^2)a}
        
        {a, a^2, ab, a(b^2), a(b^3), b(a^2)}
        
        {a, a^2, ab, a(b^2), b(a^2), b^2(a^2)}
        
        {a, a^2, a^5, ab, a(b^2), b(a^2)}
        
        {a, a^2, ab, a(b^2), b(a^2), a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), b(a^2), ab(a^3)}
        
        {a, a^2, ab, a(b^2), b(a^2), a(b^2)(a^2)}
        
        {a, a^2, ab, a(b^2), b(a^2), a(b^3)a}
        
        {a, a^2, ab, a(b^2), b(a^2), a^3b(a^2)}
        
        {a, a^2, ab, a(b^2), b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ab, a(b^2), b(a^2), abab(a^2)}
        
        {a, a^2, ab, a(b^2), b(a^2), a(b^2)(a^3)}
        
        {a, a^2, ab, a(b^2), b(a^2), a(b^3)(a^2)}
        
        {a, a^2, ab, a(b^2), b(a^2), a(b^2)ab(a^2)}
        
        {a, a^2, ab, a(b^2), b(a^2), a(b^4)(a^2)}
      - {a, a^2, a^4, ab, a(b^2)} (13 descendants)
        
        {a, a^2, a^4, ab, a(b^2), a^2ba}
        
        {a, a^2, a^4, ab, a(b^2), ab(a^2)}
        
        {a, a^2, a^4, ab, a(b^2), a(b^2)a}
        
        {a, a^2, a^4, ab, a(b^2), a(b^3)}
        
        {a, a^2, a^4, a^5, ab, a(b^2)}
        
        {a, a^2, a^4, ab, a(b^2), a^4b}
        
        {a, a^2, a^4, ab, a(b^2), a^2b(a^2)}
        
        {a, a^2, a^4, ab, a(b^2), ab(a^3)}
        
        {a, a^2, a^4, ab, a(b^2), a(b^2)(a^2)}
        
        {a, a^2, a^4, ab, a(b^2), a(b^3)a}
        
        {a, a^2, a^4, ab, a(b^2), a(b^2)(a^3)}
        
        {a, a^2, a^4, ab, a(b^2), a(b^3)(a^2)}
        
        {a, a^2, a^4, a^7, ab, a(b^2)}
      - {a, a^2, ab, a(b^2), a^2ba} (11 descendants)
        
        {a, a^2, ab, a(b^2), ab(a^2), a^2ba}
        
        {a, a^2, ab, a(b^2), a(b^2)a, a^2ba}
        
        {a, a^2, ab, a(b^2), a(b^3), a^2ba}
        
        {a, a^2, a^5, ab, a(b^2), a^2ba}
        
        {a, a^2, ab, a(b^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), a^2ba, a^2bab}
        
        {a, a^2, ab, a(b^2), ab(a^3), a^2ba}
        
        {a, a^2, ab, a(b^2), a(b^2)(a^2), a^2ba}
        
        {a, a^2, ab, a(b^2), a(b^3)a, a^2ba}
        
        {a, a^2, ab, a(b^2), a(b^2)(a^3), a^2ba}
        
        {a, a^2, ab, a(b^2), a(b^3)(a^2), a^2ba}
      - {a, a^2, ab, a(b^2), ab(a^2)} (11 descendants)
        
        {a, a^2, ab, a(b^2), ab(a^2), a(b^2)a}
        
        {a, a^2, ab, a(b^2), a(b^3), ab(a^2)}
        
        {a, a^2, a^5, ab, a(b^2), ab(a^2)}
        
        {a, a^2, ab, a(b^2), ab(a^2), a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), ab(a^2), ab(a^3)}
        
        {a, a^2, ab, a(b^2), ab(a^2), ab(a^2)b}
        
        {a, a^2, ab, a(b^2), ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, ab, a(b^2), ab(a^2), a(b^3)a}
        
        {a, a^2, ab, a(b^2), ab(a^2), a(b^2)(a^3)}
        
        {a, a^2, ab, a(b^2), ab(a^2), a(b^3)(a^2)}
        
        {a, a^2, ab, a(b^2), ab(a^2), ab(a^2)b(a^2)}
      - {a, a^2, ab, a(b^2), a(b^2)a} (12 descendants)
        
        {a, a^2, ab, a(b^2), a(b^3), a(b^2)a}
        
        {a, a^2, a^5, ab, a(b^2), a(b^2)a}
        
        {a, a^2, ab, a(b^2), a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), ab(a^3), a(b^2)a}
        
        {a, a^2, ab, a(b^2), a(b^2)a, a(b^2)(a^2)}
        
        {a, a^2, ab, a(b^2), a(b^2)a, a(b^2)ab}
        
        {a, a^2, ab, a(b^2), a(b^2)a, a(b^3)a}
        
        {a, a^2, ab, a(b^2), a(b^2)a, a(b^2)(a^3)}
        
        {a, a^2, ab, a(b^2), a(b^2)a, a(b^2)aba}
        
        {a, a^2, ab, a(b^2), a(b^2)a, a(b^3)(a^2)}
        
        {a, a^2, ab, a(b^2), a(b^2)a, a(b^2)(a^4)}
        
        {a, a^2, ab, a(b^2), a(b^2)a, a(b^2)ab(a^2)}
      - {a, a^2, ab, a(b^2), a(b^3)} (11 descendants)
        
        {a, a^2, a^5, ab, a(b^2), a(b^3)}
        
        {a, a^2, ab, a(b^2), a(b^3), a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), a(b^3), ab(a^3)}
        
        {a, a^2, ab, a(b^2), a(b^3), a(b^2)(a^2)}
        
        {a, a^2, ab, a(b^2), a(b^3), a(b^3)a}
        
        {a, a^2, ab, a(b^2), a(b^3), a(b^4)}
        
        {a, a^2, ab, a(b^2), a(b^3), a(b^2)(a^3)}
        
        {a, a^2, ab, a(b^2), a(b^3), a(b^3)(a^2)}
        
        {a, a^2, ab, a(b^2), a(b^3), a(b^4)a}
        
        {a, a^2, ab, a(b^2), a(b^3), a(b^3)(a^3)}
        
        {a, a^2, ab, a(b^2), a(b^3), a(b^4)(a^2)}
      - {a, a^2, a^5, ab, a(b^2)} (6 descendants)
        
        {a, a^2, a^5, ab, a(b^2), a^2b(a^2)}
        
        {a, a^2, a^5, ab, a(b^2), ab(a^3)}
        
        {a, a^2, a^5, ab, a(b^2), a(b^2)(a^2)}
        
        {a, a^2, a^5, ab, a(b^2), a(b^3)a}
        
        {a, a^2, a^5, ab, a(b^2), a(b^2)(a^3)}
        
        {a, a^2, a^5, ab, a(b^2), a(b^3)(a^2)}
      - {a, a^2, ab, a(b^2), a^2b(a^2)} (5 descendants)
        
        {a, a^2, ab, a(b^2), ab(a^3), a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), a(b^3)a, a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), a(b^2)(a^3), a^2b(a^2)}
        
        {a, a^2, ab, a(b^2), a(b^3)(a^2), a^2b(a^2)}
      - {a, a^2, ab, a(b^2), ab(a^3)} (4 descendants)
        
        {a, a^2, ab, a(b^2), ab(a^3), a(b^2)(a^2)}
        
        {a, a^2, ab, a(b^2), ab(a^3), a(b^3)a}
        
        {a, a^2, ab, a(b^2), ab(a^3), a(b^2)(a^3)}
        
        {a, a^2, ab, a(b^2), ab(a^3), a(b^3)(a^2)}
      - {a, a^2, ab, a(b^2), a(b^2)(a^2)} (4 descendants)
        
        {a, a^2, ab, a(b^2), a(b^2)(a^2), a(b^3)a}
        
        {a, a^2, ab, a(b^2), a(b^2)(a^2), a(b^2)(a^3)}
        
        {a, a^2, ab, a(b^2), a(b^2)(a^2), a(b^2)(a^2)b}
        
        {a, a^2, ab, a(b^2), a(b^2)(a^2), a(b^3)(a^2)}
      - {a, a^2, ab, a(b^2), a(b^3)a} (3 descendants)
        
        {a, a^2, ab, a(b^2), a(b^2)(a^3), a(b^3)a}
        
        {a, a^2, ab, a(b^2), a(b^3)a, a(b^3)(a^2)}
        
        {a, a^2, ab, a(b^2), a(b^3)a, a(b^3)ab}
      - {a, a^2, ab, a(b^2), a(b^2)(a^3)} (1 descendant)
        
        {a, a^2, ab, a(b^2), a(b^2)(a^3), a(b^3)(a^2)}
      - {a, a^2, ab, a(b^2), a(b^3)(a^2)} (0 descendants)
    - {a, a^2, ab, b(a^2)} (13 descendants)
      - {a, a^2, a^4, ab, b(a^2)} (14 descendants)
        
        {a, a^2, a^4, ab, b(a^2), a^2ba}
        
        {a, a^2, a^4, ab, b(a^2), ab(a^2)}
        
        {a, a^2, a^4, ab, b(a^2), a(b^2)a}
        
        {a, a^2, a^4, ab, b(a^2), b^2(a^2)}
        
        {a, a^2, a^4, a^5, ab, b(a^2)}
        
        {a, a^2, a^4, ab, b(a^2), a^4b}
        
        {a, a^2, a^4, ab, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, ab, b(a^2), ab(a^3)}
        
        {a, a^2, a^4, ab, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^4, ab, b(a^2), a^3b(a^2)}
        
        {a, a^2, a^4, ab, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^4, ab, b(a^2), abab(a^2)}
        
        {a, a^2, a^4, ab, b(a^2), a(b^3)(a^2)}
        
        {a, a^2, a^4, a^7, ab, b(a^2)}
      - {a, a^2, ab, b(a^2), a^2ba} (12 descendants)
        
        {a, a^2, ab, b(a^2), ab(a^2), a^2ba}
        
        {a, a^2, ab, b(a^2), a(b^2)a, a^2ba}
        
        {a, a^2, ab, b(a^2), b^2(a^2), a^2ba}
        
        {a, a^2, a^5, ab, b(a^2), a^2ba}
        
        {a, a^2, ab, b(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, ab, b(a^2), a^2ba, a^2bab}
        
        {a, a^2, ab, b(a^2), ab(a^3), a^2ba}
        
        {a, a^2, ab, b(a^2), a(b^2)(a^2), a^2ba}
        
        {a, a^2, ab, b(a^2), a^2ba, a^3b(a^2)}
        
        {a, a^2, ab, b(a^2), a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), a^2ba, abab(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^3)(a^2), a^2ba}
      - {a, a^2, ab, b(a^2), ab(a^2)} (16 descendants)
        
        {a, a^2, ab, b(a^2), ab(a^2), a(b^2)a}
        
        {a, a^2, ab, b(a^2), b^2(a^2), ab(a^2)}
        
        {a, a^2, a^5, ab, b(a^2), ab(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^2), a^2b(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^2), ab(a^3)}
        
        {a, a^2, ab, b(a^2), ab(a^2), ab(a^2)b}
        
        {a, a^2, ab, b(a^2), ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^2), bab(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^2), a^3b(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^2), abab(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^2), a(b^3)(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^2), a^4b(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^2), a^2bab(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^2), ab(a^2)b(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^2), a(b^2)ab(a^2)}
      - {a, a^2, ab, b(a^2), a(b^2)a} (10 descendants)
        
        {a, a^2, ab, b(a^2), b^2(a^2), a(b^2)a}
        
        {a, a^2, a^5, ab, b(a^2), a(b^2)a}
        
        {a, a^2, ab, b(a^2), a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^3), a(b^2)a}
        
        {a, a^2, ab, b(a^2), a(b^2)a, a(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^2)a, a(b^2)ab}
        
        {a, a^2, ab, b(a^2), a(b^2)a, a^3b(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^2)a, abab(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^2)a, a(b^3)(a^2)}
      - {a, a^2, ab, b(a^2), b^2(a^2)} (13 descendants)
        
        {a, a^2, a^5, ab, b(a^2), b^2(a^2)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), a^2b(a^2)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), ab(a^3)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), a(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), b^3(a^2)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), a^3b(a^2)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), abab(a^2)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), a(b^3)(a^2)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), a^2(b^3)(a^2)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), aba(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), b^2(a^2), a(b^4)(a^2)}
      - {a, a^2, a^5, ab, b(a^2)} (7 descendants)
        
        {a, a^2, a^5, ab, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^5, ab, b(a^2), ab(a^3)}
        
        {a, a^2, a^5, ab, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^5, ab, b(a^2), a^3b(a^2)}
        
        {a, a^2, a^5, ab, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^5, ab, b(a^2), abab(a^2)}
        
        {a, a^2, a^5, ab, b(a^2), a(b^3)(a^2)}
      - {a, a^2, ab, b(a^2), a^2b(a^2)} (6 descendants)
        
        {a, a^2, ab, b(a^2), ab(a^3), a^2b(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, ab, b(a^2), a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, ab, b(a^2), a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), a^2b(a^2), abab(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^3)(a^2), a^2b(a^2)}
      - {a, a^2, ab, b(a^2), ab(a^3)} (5 descendants)
        
        {a, a^2, ab, b(a^2), ab(a^3), a(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^3), a^3b(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^3), abab(a^2)}
        
        {a, a^2, ab, b(a^2), ab(a^3), a(b^3)(a^2)}
      - {a, a^2, ab, b(a^2), a(b^2)(a^2)} (4 descendants)
        
        {a, a^2, ab, b(a^2), a(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^2)(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^2)(a^2), abab(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^2)(a^2), a(b^3)(a^2)}
      - {a, a^2, ab, b(a^2), a^3b(a^2)} (3 descendants)
        
        {a, a^2, ab, b(a^2), a^2(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, ab, b(a^2), a^3b(a^2), abab(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^3)(a^2), a^3b(a^2)}
      - {a, a^2, ab, b(a^2), a^2(b^2)(a^2)} (2 descendants)
        
        {a, a^2, ab, b(a^2), a^2(b^2)(a^2), abab(a^2)}
        
        {a, a^2, ab, b(a^2), a(b^3)(a^2), a^2(b^2)(a^2)}
      - {a, a^2, ab, b(a^2), abab(a^2)} (1 descendant)
        
        {a, a^2, ab, b(a^2), a(b^3)(a^2), abab(a^2)}
      - {a, a^2, ab, b(a^2), a(b^3)(a^2)} (0 descendants)
    - {a, a^2, a^4, ab} (9 descendants)
      - {a, a^2, a^4, ab, a^2ba} (10 descendants)
        
        {a, a^2, a^4, ab, ab(a^2), a^2ba}
        
        {a, a^2, a^4, ab, a(b^2)a, a^2ba}
        
        {a, a^2, a^4, a^5, ab, a^2ba}
        
        {a, a^2, a^4, ab, a^4b, a^2ba}
        
        {a, a^2, a^4, ab, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^4, ab, a^2ba, a^2bab}
        
        {a, a^2, a^4, ab, ab(a^3), a^2ba}
        
        {a, a^2, a^4, ab, a(b^2)(a^2), a^2ba}
        
        {a, a^2, a^4, a^7, ab, a^2ba}
        
        {a, a^2, a^4, ab, a^2ba, a^2b(a^4)}
      - {a, a^2, a^4, ab, ab(a^2)} (11 descendants)
        
        {a, a^2, a^4, ab, ab(a^2), a(b^2)a}
        
        {a, a^2, a^4, a^5, ab, ab(a^2)}
        
        {a, a^2, a^4, ab, a^4b, ab(a^2)}
        
        {a, a^2, a^4, ab, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, ab, ab(a^2), ab(a^3)}
        
        {a, a^2, a^4, ab, ab(a^2), ab(a^2)b}
        
        {a, a^2, a^4, ab, ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, ab, ab(a^2)}
        
        {a, a^2, a^4, ab, ab(a^2), a^4b(a^2)}
        
        {a, a^2, a^4, ab, ab(a^2), ab(a^5)}
        
        {a, a^2, a^4, ab, ab(a^2), ab(a^2)b(a^2)}
      - {a, a^2, a^4, ab, a(b^2)a} (8 descendants)
        
        {a, a^2, a^4, a^5, ab, a(b^2)a}
        
        {a, a^2, a^4, ab, a^4b, a(b^2)a}
        
        {a, a^2, a^4, ab, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, a^4, ab, ab(a^3), a(b^2)a}
        
        {a, a^2, a^4, ab, a(b^2)a, a(b^2)(a^2)}
        
        {a, a^2, a^4, ab, a(b^2)a, a(b^2)ab}
        
        {a, a^2, a^4, a^7, ab, a(b^2)a}
        
        {a, a^2, a^4, ab, a(b^2)a, a(b^2)(a^4)}
      - {a, a^2, a^4, a^5, ab} (6 descendants)
        
        {a, a^2, a^4, a^5, ab, a^4b}
        
        {a, a^2, a^4, a^5, ab, a^2b(a^2)}
        
        {a, a^2, a^4, a^5, ab, ab(a^3)}
        
        {a, a^2, a^4, a^5, ab, a(b^2)(a^2)}
        
        {a, a^2, a^4, a^5, a^7, ab}
        
        {a, a^2, a^4, a^5, a^8, ab}
      - {a, a^2, a^4, ab, a^4b} (4 descendants)
        
        {a, a^2, a^4, ab, a^4b, a^2b(a^2)}
        
        {a, a^2, a^4, ab, a^4b, ab(a^3)}
        
        {a, a^2, a^4, ab, a^4b, a(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, ab, a^4b}
      - {a, a^2, a^4, ab, a^2b(a^2)} (3 descendants)
        
        {a, a^2, a^4, ab, ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^4, ab, a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, a^7, ab, a^2b(a^2)}
      - {a, a^2, a^4, ab, ab(a^3)} (2 descendants)
        
        {a, a^2, a^4, ab, ab(a^3), a(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, ab, ab(a^3)}
      - {a, a^2, a^4, ab, a(b^2)(a^2)} (1 descendant)
        
        {a, a^2, a^4, a^7, ab, a(b^2)(a^2)}
      - {a, a^2, a^4, a^7, ab} (0 descendants)
    - {a, a^2, ab, a^2ba} (7 descendants)
      - {a, a^2, ab, ab(a^2), a^2ba} (9 descendants)
        
        {a, a^2, ab, ab(a^2), a(b^2)a, a^2ba}
        
        {a, a^2, a^5, ab, ab(a^2), a^2ba}
        
        {a, a^2, ab, ab(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, ab, ab(a^2), a^2ba, a^2bab}
        
        {a, a^2, ab, ab(a^2), ab(a^3), a^2ba}
        
        {a, a^2, ab, ab(a^2), a^2ba, ab(a^2)b}
        
        {a, a^2, ab, ab(a^2), a(b^2)(a^2), a^2ba}
        
        {a, a^2, ab, ab(a^2), a^2ba, a^2bab(a^2)}
        
        {a, a^2, ab, ab(a^2), a^2ba, ab(a^2)b(a^2)}
      - {a, a^2, ab, a(b^2)a, a^2ba} (6 descendants)
        
        {a, a^2, a^5, ab, a(b^2)a, a^2ba}
        
        {a, a^2, ab, a(b^2)a, a^2ba, a^2b(a^2)}
        
        {a, a^2, ab, a(b^2)a, a^2ba, a^2bab}
        
        {a, a^2, ab, ab(a^3), a(b^2)a, a^2ba}
        
        {a, a^2, ab, a(b^2)a, a(b^2)(a^2), a^2ba}
        
        {a, a^2, ab, a(b^2)a, a^2ba, a(b^2)ab}
      - {a, a^2, a^5, ab, a^2ba} (4 descendants)
        
        {a, a^2, a^5, ab, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^5, ab, a^2ba, a^2bab}
        
        {a, a^2, a^5, ab, ab(a^3), a^2ba}
        
        {a, a^2, a^5, ab, a(b^2)(a^2), a^2ba}
      - {a, a^2, ab, a^2ba, a^2b(a^2)} (5 descendants)
        
        {a, a^2, ab, a^2ba, a^2b(a^2), a^2bab}
        
        {a, a^2, ab, ab(a^3), a^2ba, a^2b(a^2)}
        
        {a, a^2, ab, a(b^2)(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, ab, a^2ba, a^2b(a^2), a^2b(a^2)ba}
        
        {a, a^2, ab, a^2ba, a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, ab, a^2ba, a^2bab} (2 descendants)
        
        {a, a^2, ab, ab(a^3), a^2ba, a^2bab}
        
        {a, a^2, ab, a(b^2)(a^2), a^2ba, a^2bab}
      - {a, a^2, ab, ab(a^3), a^2ba} (1 descendant)
        
        {a, a^2, ab, ab(a^3), a(b^2)(a^2), a^2ba}
      - {a, a^2, ab, a(b^2)(a^2), a^2ba} (0 descendants)
    - {a, a^2, ab, ab(a^2)} (7 descendants)
      - {a, a^2, ab, ab(a^2), a(b^2)a} (8 descendants)
        
        {a, a^2, a^5, ab, ab(a^2), a(b^2)a}
        
        {a, a^2, ab, ab(a^2), a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ab, ab(a^2), ab(a^3), a(b^2)a}
        
        {a, a^2, ab, ab(a^2), a(b^2)a, ab(a^2)b}
        
        {a, a^2, ab, ab(a^2), a(b^2)a, a(b^2)(a^2)}
        
        {a, a^2, ab, ab(a^2), a(b^2)a, a(b^2)ab}
        
        {a, a^2, ab, ab(a^2), a(b^2)a, ab(a^2)b(a^2)}
        
        {a, a^2, ab, ab(a^2), a(b^2)a, a(b^2)ab(a^2)}
      - {a, a^2, a^5, ab, ab(a^2)} (5 descendants)
        
        {a, a^2, a^5, ab, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^5, ab, ab(a^2), ab(a^3)}
        
        {a, a^2, a^5, ab, ab(a^2), ab(a^2)b}
        
        {a, a^2, a^5, ab, ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^5, ab, ab(a^2), ab(a^2)b(a^2)}
      - {a, a^2, ab, ab(a^2), a^2b(a^2)} (5 descendants)
        
        {a, a^2, ab, ab(a^2), ab(a^3), a^2b(a^2)}
        
        {a, a^2, ab, ab(a^2), a^2b(a^2), ab(a^2)b}
        
        {a, a^2, ab, ab(a^2), a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, ab, ab(a^2), a^2b(a^2), ab(a^2)b(a^2)}
        
        {a, a^2, ab, ab(a^2), a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, ab, ab(a^2), ab(a^3)} (3 descendants)
        
        {a, a^2, ab, ab(a^2), ab(a^3), ab(a^2)b}
        
        {a, a^2, ab, ab(a^2), ab(a^3), a(b^2)(a^2)}
        
        {a, a^2, ab, ab(a^2), ab(a^3), ab(a^2)b(a^2)}
      - {a, a^2, ab, ab(a^2), ab(a^2)b} (2 descendants)
        
        {a, a^2, ab, ab(a^2), a(b^2)(a^2), ab(a^2)b}
        
        {a, a^2, ab, ab(a^2), ab(a^2)b, ab(a^2)b(a^2)}
      - {a, a^2, ab, ab(a^2), a(b^2)(a^2)} (1 descendant)
        
        {a, a^2, ab, ab(a^2), a(b^2)(a^2), ab(a^2)b(a^2)}
      - {a, a^2, ab, ab(a^2), ab(a^2)b(a^2)} (0 descendants)
    - {a, a^2, ab, a(b^2)a} (5 descendants)
      - {a, a^2, a^5, ab, a(b^2)a} (4 descendants)
        
        {a, a^2, a^5, ab, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, a^5, ab, ab(a^3), a(b^2)a}
        
        {a, a^2, a^5, ab, a(b^2)a, a(b^2)(a^2)}
        
        {a, a^2, a^5, ab, a(b^2)a, a(b^2)ab}
      - {a, a^2, ab, a(b^2)a, a^2b(a^2)} (3 descendants)
        
        {a, a^2, ab, ab(a^3), a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ab, a(b^2)a, a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, ab, a(b^2)a, a^2b(a^2), a(b^2)ab}
      - {a, a^2, ab, ab(a^3), a(b^2)a} (2 descendants)
        
        {a, a^2, ab, ab(a^3), a(b^2)a, a(b^2)(a^2)}
        
        {a, a^2, ab, ab(a^3), a(b^2)a, a(b^2)ab}
      - {a, a^2, ab, a(b^2)a, a(b^2)(a^2)} (1 descendant)
        
        {a, a^2, ab, a(b^2)a, a(b^2)(a^2), a(b^2)ab}
      - {a, a^2, ab, a(b^2)a, a(b^2)ab} (1 descendant)
        
        {a, a^2, ab, a(b^2)a, a(b^2)ab, a(b^2)a(b^2)a}
    - {a, a^2, a^5, ab} (3 descendants)
      - {a, a^2, a^5, ab, a^2b(a^2)} (2 descendants)
        
        {a, a^2, a^5, ab, ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^5, ab, a(b^2)(a^2), a^2b(a^2)}
      - {a, a^2, a^5, ab, ab(a^3)} (1 descendant)
        
        {a, a^2, a^5, ab, ab(a^3), a(b^2)(a^2)}
      - {a, a^2, a^5, ab, a(b^2)(a^2)} (0 descendants)
    - {a, a^2, ab, a^2b(a^2)} (2 descendants)
      - {a, a^2, ab, ab(a^3), a^2b(a^2)} (1 descendant)
        
        {a, a^2, ab, ab(a^3), a(b^2)(a^2), a^2b(a^2)}
      - {a, a^2, ab, a(b^2)(a^2), a^2b(a^2)} (0 descendants)
    - {a, a^2, ab, ab(a^3)} (1 descendant)
      - {a, a^2, ab, ab(a^3), a(b^2)(a^2)} (0 descendants)
    - {a, a^2, ab, a(b^2)(a^2)} (0 descendants)
  - {a, a^2, ba} (13 descendants)
    - {a, a^2, a^3, ba} (22 descendants)
      - {a, a^2, a^3, ba, a^2b} (27 descendants)
        
        {a, a^2, a^3, ba, a^2b, aba}
        
        {a, a^2, a^3, ba, b(a^2), a^2b}
        
        {a, a^2, a^3, ba, a^2b, b^2a}
        
        {a, a^2, a^3, a^4, ba, a^2b}
        
        {a, a^2, a^3, ba, a^2b, a^3b}
        
        {a, a^2, a^3, ba, a^2b, a^2ba}
        
        {a, a^2, a^3, ba, a^2b, a^2(b^2)}
        
        {a, a^2, a^3, ba, a^2b, ab(a^2)}
        
        {a, a^2, a^3, ba, a^2b, a(b^2)a}
        
        {a, a^2, a^3, ba, b(a^3), a^2b}
        
        {a, a^2, a^3, a^5, ba, a^2b}
        
        {a, a^2, a^3, ba, a^2b, a^3ba}
        
        {a, a^2, a^3, ba, a^2b, a^2b(a^2)}
        
        {a, a^2, a^3, ba, a^2b, a^2(b^2)a}
        
        {a, a^2, a^3, ba, a^2b, ab(a^3)}
        
        {a, a^2, a^3, a^6, ba, a^2b}
        
        {a, a^2, a^3, ba, a^2b, a^4ba}
        
        {a, a^2, a^3, ba, a^2b, a^3b(a^2)}
        
        {a, a^2, a^3, ba, a^2b, a^3(b^2)a}
        
        {a, a^2, a^3, ba, a^2b, a^2b(a^3)}
        
        {a, a^2, a^3, ba, a^2b, a^2baba}
        
        {a, a^2, a^3, ba, a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, ba, a^2b, a^2(b^3)a}
        
        {a, a^2, a^3, a^7, ba, a^2b}
        
        {a, a^2, a^3, ba, a^2b, a^3b(a^3)}
        
        {a, a^2, a^3, ba, a^2b, a^2b(a^4)}
        
        {a, a^2, a^3, ba, a^2b, a^2(b^2)(a^3)}
      - {a, a^2, a^3, ba, aba} (25 descendants)
        
        {a, a^2, a^3, ba, b(a^2), aba}
        
        {a, a^2, a^3, ba, b^2a, aba}
        
        {a, a^2, a^3, a^4, ba, aba}
        
        {a, a^2, a^3, ba, a^3b, aba}
        
        {a, a^2, a^3, ba, aba, a^2ba}
        
        {a, a^2, a^3, ba, aba, ab(a^2)}
        
        {a, a^2, a^3, ba, aba, a(b^2)a}
        
        {a, a^2, a^3, ba, b(a^3), aba}
        
        {a, a^2, a^3, ba, aba, baba}
        
        {a, a^2, a^3, a^5, ba, aba}
        
        {a, a^2, a^3, ba, aba, a^3ba}
        
        {a, a^2, a^3, ba, aba, a^2b(a^2)}
        
        {a, a^2, a^3, ba, aba, a^2(b^2)a}
        
        {a, a^2, a^3, ba, aba, ab(a^3)}
        
        {a, a^2, a^3, ba, aba, ababa}
        
        {a, a^2, a^3, a^6, ba, aba}
        
        {a, a^2, a^3, ba, aba, a^4ba}
        
        {a, a^2, a^3, ba, aba, a^3b(a^2)}
        
        {a, a^2, a^3, ba, aba, a^3(b^2)a}
        
        {a, a^2, a^3, ba, aba, a^2b(a^3)}
        
        {a, a^2, a^3, ba, aba, a^2baba}
        
        {a, a^2, a^3, a^7, ba, aba}
        
        {a, a^2, a^3, ba, aba, a^5ba}
        
        {a, a^2, a^3, ba, aba, a^3b(a^3)}
        
        {a, a^2, a^3, ba, aba, a^3baba}
      - {a, a^2, a^3, ba, b(a^2)} (24 descendants)
        
        {a, a^2, a^3, ba, b(a^2), b^2a}
        
        {a, a^2, a^3, a^4, ba, b(a^2)}
        
        {a, a^2, a^3, ba, b(a^2), a^3b}
        
        {a, a^2, a^3, ba, b(a^2), a^2ba}
        
        {a, a^2, a^3, ba, b(a^2), ab(a^2)}
        
        {a, a^2, a^3, ba, b(a^2), a(b^2)a}
        
        {a, a^2, a^3, ba, b(a^2), b(a^3)}
        
        {a, a^2, a^3, ba, b(a^2), b^2(a^2)}
        
        {a, a^2, a^3, a^5, ba, b(a^2)}
        
        {a, a^2, a^3, ba, b(a^2), a^3ba}
        
        {a, a^2, a^3, ba, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, ba, b(a^2), a^2(b^2)a}
        
        {a, a^2, a^3, ba, b(a^2), ab(a^3)}
        
        {a, a^2, a^3, ba, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, ba, b(a^2)}
        
        {a, a^2, a^3, ba, b(a^2), a^4ba}
        
        {a, a^2, a^3, ba, b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, ba, b(a^2), a^3(b^2)a}
        
        {a, a^2, a^3, ba, b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, ba, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, ba, b(a^2)}
        
        {a, a^2, a^3, ba, b(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, ba, b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, ba, b(a^2), a^3(b^2)(a^2)}
      - {a, a^2, a^3, ba, b^2a} (23 descendants)
        
        {a, a^2, a^3, a^4, ba, b^2a}
        
        {a, a^2, a^3, ba, a^3b, b^2a}
        
        {a, a^2, a^3, ba, b^2a, a^2ba}
        
        {a, a^2, a^3, ba, b^2a, ab(a^2)}
        
        {a, a^2, a^3, ba, b^2a, a(b^2)a}
        
        {a, a^2, a^3, ba, b(a^3), b^2a}
        
        {a, a^2, a^3, ba, b^2a, b^3a}
        
        {a, a^2, a^3, a^5, ba, b^2a}
        
        {a, a^2, a^3, ba, b^2a, a^3ba}
        
        {a, a^2, a^3, ba, b^2a, a^2b(a^2)}
        
        {a, a^2, a^3, ba, b^2a, a^2(b^2)a}
        
        {a, a^2, a^3, ba, b^2a, ab(a^3)}
        
        {a, a^2, a^3, ba, b^2a, a(b^3)a}
        
        {a, a^2, a^3, a^6, ba, b^2a}
        
        {a, a^2, a^3, ba, b^2a, a^4ba}
        
        {a, a^2, a^3, ba, b^2a, a^3b(a^2)}
        
        {a, a^2, a^3, ba, b^2a, a^3(b^2)a}
        
        {a, a^2, a^3, ba, b^2a, a^2b(a^3)}
        
        {a, a^2, a^3, ba, b^2a, a^2(b^3)a}
        
        {a, a^2, a^3, a^7, ba, b^2a}
        
        {a, a^2, a^3, ba, b^2a, a^4(b^2)a}
        
        {a, a^2, a^3, ba, b^2a, a^3b(a^3)}
        
        {a, a^2, a^3, ba, b^2a, a^3(b^3)a}
      - {a, a^2, a^3, a^4, ba} (29 descendants)
        
        {a, a^2, a^3, a^4, ba, a^3b}
        
        {a, a^2, a^3, a^4, ba, a^2ba}
        
        {a, a^2, a^3, a^4, ba, ab(a^2)}
        
        {a, a^2, a^3, a^4, ba, a(b^2)a}
        
        {a, a^2, a^3, a^4, ba, b(a^3)}
        
        {a, a^2, a^3, a^4, a^5, ba}
        
        {a, a^2, a^3, a^4, ba, a^4b}
        
        {a, a^2, a^3, a^4, ba, a^3ba}
        
        {a, a^2, a^3, a^4, ba, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, ba, a^2(b^2)a}
        
        {a, a^2, a^3, a^4, ba, ab(a^3)}
        
        {a, a^2, a^3, a^4, ba, b(a^4)}
        
        {a, a^2, a^3, a^4, a^6, ba}
        
        {a, a^2, a^3, a^4, ba, a^4ba}
        
        {a, a^2, a^3, a^4, ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, ba, a^3(b^2)a}
        
        {a, a^2, a^3, a^4, ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, ba, ab(a^4)}
        
        {a, a^2, a^3, a^4, a^7, ba}
        
        {a, a^2, a^3, a^4, ba, a^5ba}
        
        {a, a^2, a^3, a^4, ba, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, ba, a^4(b^2)a}
        
        {a, a^2, a^3, a^4, ba, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, ba, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, ba}
        
        {a, a^2, a^3, a^4, ba, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, ba, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, ba}
        
        {a, a^2, a^3, a^4, ba, a^4b(a^4)}
      - {a, a^2, a^3, ba, a^3b} (22 descendants)
        
        {a, a^2, a^3, ba, a^3b, a^2ba}
        
        {a, a^2, a^3, ba, a^3b, ab(a^2)}
        
        {a, a^2, a^3, ba, a^3b, a(b^2)a}
        
        {a, a^2, a^3, ba, b(a^3), a^3b}
        
        {a, a^2, a^3, a^5, ba, a^3b}
        
        {a, a^2, a^3, ba, a^3b, a^3ba}
        
        {a, a^2, a^3, ba, a^3b, a^3(b^2)}
        
        {a, a^2, a^3, ba, a^3b, a^2b(a^2)}
        
        {a, a^2, a^3, ba, a^3b, a^2(b^2)a}
        
        {a, a^2, a^3, ba, a^3b, ab(a^3)}
        
        {a, a^2, a^3, a^6, ba, a^3b}
        
        {a, a^2, a^3, ba, a^3b, a^4ba}
        
        {a, a^2, a^3, ba, a^3b, a^3b(a^2)}
        
        {a, a^2, a^3, ba, a^3b, a^3(b^2)a}
        
        {a, a^2, a^3, ba, a^3b, a^2b(a^3)}
        
        {a, a^2, a^3, a^7, ba, a^3b}
        
        {a, a^2, a^3, ba, a^3b, a^3b(a^3)}
        
        {a, a^2, a^3, ba, a^3b, a^3baba}
        
        {a, a^2, a^3, ba, a^3b, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, ba, a^3b, a^3(b^3)a}
        
        {a, a^2, a^3, ba, a^3b, a^3b(a^4)}
        
        {a, a^2, a^3, ba, a^3b, a^3(b^2)(a^3)}
      - {a, a^2, a^3, ba, a^2ba} (17 descendants)
        
        {a, a^2, a^3, ba, ab(a^2), a^2ba}
        
        {a, a^2, a^3, ba, a(b^2)a, a^2ba}
        
        {a, a^2, a^3, ba, b(a^3), a^2ba}
        
        {a, a^2, a^3, a^5, ba, a^2ba}
        
        {a, a^2, a^3, ba, a^2ba, a^3ba}
        
        {a, a^2, a^3, ba, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, ba, a^2ba, a^2(b^2)a}
        
        {a, a^2, a^3, ba, ab(a^3), a^2ba}
        
        {a, a^2, a^3, ba, a^2ba, b(a^2)ba}
        
        {a, a^2, a^3, a^6, ba, a^2ba}
        
        {a, a^2, a^3, ba, a^2ba, a^4ba}
        
        {a, a^2, a^3, ba, a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, ba, a^2ba, a^3(b^2)a}
        
        {a, a^2, a^3, ba, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^7, ba, a^2ba}
        
        {a, a^2, a^3, ba, a^2ba, a^3b(a^3)}
        
        {a, a^2, a^3, ba, a^2ba, a^2b(a^2)ba}
      - {a, a^2, a^3, ba, ab(a^2)} (15 descendants)
        
        {a, a^2, a^3, ba, ab(a^2), a(b^2)a}
        
        {a, a^2, a^3, ba, b(a^3), ab(a^2)}
        
        {a, a^2, a^3, a^5, ba, ab(a^2)}
        
        {a, a^2, a^3, ba, ab(a^2), a^3ba}
        
        {a, a^2, a^3, ba, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, ba, ab(a^2), a^2(b^2)a}
        
        {a, a^2, a^3, ba, ab(a^2), ab(a^3)}
        
        {a, a^2, a^3, ba, ab(a^2), bab(a^2)}
        
        {a, a^2, a^3, a^6, ba, ab(a^2)}
        
        {a, a^2, a^3, ba, ab(a^2), a^4ba}
        
        {a, a^2, a^3, ba, ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, ba, ab(a^2), a^3(b^2)a}
        
        {a, a^2, a^3, ba, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, ba, ab(a^2)}
        
        {a, a^2, a^3, ba, ab(a^2), a^3b(a^3)}
      - {a, a^2, a^3, ba, a(b^2)a} (14 descendants)
        
        {a, a^2, a^3, ba, b(a^3), a(b^2)a}
        
        {a, a^2, a^3, a^5, ba, a(b^2)a}
        
        {a, a^2, a^3, ba, a(b^2)a, a^3ba}
        
        {a, a^2, a^3, ba, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, a^3, ba, a(b^2)a, a^2(b^2)a}
        
        {a, a^2, a^3, ba, ab(a^3), a(b^2)a}
        
        {a, a^2, a^3, ba, a(b^2)a, ba(b^2)a}
        
        {a, a^2, a^3, a^6, ba, a(b^2)a}
        
        {a, a^2, a^3, ba, a(b^2)a, a^4ba}
        
        {a, a^2, a^3, ba, a(b^2)a, a^3b(a^2)}
        
        {a, a^2, a^3, ba, a(b^2)a, a^3(b^2)a}
        
        {a, a^2, a^3, ba, a(b^2)a, a^2b(a^3)}
        
        {a, a^2, a^3, a^7, ba, a(b^2)a}
        
        {a, a^2, a^3, ba, a(b^2)a, a^3b(a^3)}
      - {a, a^2, a^3, ba, b(a^3)} (17 descendants)
        
        {a, a^2, a^3, a^5, ba, b(a^3)}
        
        {a, a^2, a^3, ba, b(a^3), a^3ba}
        
        {a, a^2, a^3, ba, b(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, ba, b(a^3), a^2(b^2)a}
        
        {a, a^2, a^3, ba, b(a^3), ab(a^3)}
        
        {a, a^2, a^3, ba, b(a^3), b^2(a^3)}
        
        {a, a^2, a^3, a^6, ba, b(a^3)}
        
        {a, a^2, a^3, ba, b(a^3), a^4ba}
        
        {a, a^2, a^3, ba, b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, ba, b(a^3), a^3(b^2)a}
        
        {a, a^2, a^3, ba, b(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, ba, b(a^3), a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, ba, b(a^3)}
        
        {a, a^2, a^3, ba, b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, ba, b(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, ba, b(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, ba, b(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^5, ba} (13 descendants)
        
        {a, a^2, a^3, a^5, ba, a^3ba}
        
        {a, a^2, a^3, a^5, ba, a^2b(a^2)}
        
        {a, a^2, a^3, a^5, ba, a^2(b^2)a}
        
        {a, a^2, a^3, a^5, ba, ab(a^3)}
        
        {a, a^2, a^3, a^5, a^6, ba}
        
        {a, a^2, a^3, a^5, ba, a^4ba}
        
        {a, a^2, a^3, a^5, ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^5, ba, a^3(b^2)a}
        
        {a, a^2, a^3, a^5, ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^5, ba, b(a^5)}
        
        {a, a^2, a^3, a^5, a^7, ba}
        
        {a, a^2, a^3, a^5, ba, a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^9, ba}
      - {a, a^2, a^3, ba, a^3ba} (10 descendants)
        
        {a, a^2, a^3, ba, a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, ba, a^2(b^2)a, a^3ba}
        
        {a, a^2, a^3, ba, ab(a^3), a^3ba}
        
        {a, a^2, a^3, a^6, ba, a^3ba}
        
        {a, a^2, a^3, ba, a^3ba, a^4ba}
        
        {a, a^2, a^3, ba, a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, ba, a^3ba, a^3(b^2)a}
        
        {a, a^2, a^3, ba, a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^7, ba, a^3ba}
        
        {a, a^2, a^3, ba, a^3ba, a^3b(a^3)}
      - {a, a^2, a^3, ba, a^2b(a^2)} (9 descendants)
        
        {a, a^2, a^3, ba, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, a^3, ba, ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, a^6, ba, a^2b(a^2)}
        
        {a, a^2, a^3, ba, a^2b(a^2), a^4ba}
        
        {a, a^2, a^3, ba, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, ba, a^2b(a^2), a^3(b^2)a}
        
        {a, a^2, a^3, ba, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, ba, a^2b(a^2)}
        
        {a, a^2, a^3, ba, a^2b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, ba, a^2(b^2)a} (8 descendants)
        
        {a, a^2, a^3, ba, ab(a^3), a^2(b^2)a}
        
        {a, a^2, a^3, a^6, ba, a^2(b^2)a}
        
        {a, a^2, a^3, ba, a^2(b^2)a, a^4ba}
        
        {a, a^2, a^3, ba, a^2(b^2)a, a^3b(a^2)}
        
        {a, a^2, a^3, ba, a^2(b^2)a, a^3(b^2)a}
        
        {a, a^2, a^3, ba, a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, a^3, a^7, ba, a^2(b^2)a}
        
        {a, a^2, a^3, ba, a^2(b^2)a, a^3b(a^3)}
      - {a, a^2, a^3, ba, ab(a^3)} (8 descendants)
        
        {a, a^2, a^3, a^6, ba, ab(a^3)}
        
        {a, a^2, a^3, ba, ab(a^3), a^4ba}
        
        {a, a^2, a^3, ba, ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, ba, ab(a^3), a^3(b^2)a}
        
        {a, a^2, a^3, ba, ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, ba, ab(a^3), bab(a^3)}
        
        {a, a^2, a^3, a^7, ba, ab(a^3)}
        
        {a, a^2, a^3, ba, ab(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^6, ba} (6 descendants)
        
        {a, a^2, a^3, a^6, ba, a^4ba}
        
        {a, a^2, a^3, a^6, ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^6, ba, a^3(b^2)a}
        
        {a, a^2, a^3, a^6, ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^6, a^7, ba}
        
        {a, a^2, a^3, a^6, ba, a^3b(a^3)}
      - {a, a^2, a^3, ba, a^4ba} (5 descendants)
        
        {a, a^2, a^3, ba, a^3b(a^2), a^4ba}
        
        {a, a^2, a^3, ba, a^3(b^2)a, a^4ba}
        
        {a, a^2, a^3, ba, a^2b(a^3), a^4ba}
        
        {a, a^2, a^3, a^7, ba, a^4ba}
        
        {a, a^2, a^3, ba, a^3b(a^3), a^4ba}
      - {a, a^2, a^3, ba, a^3b(a^2)} (4 descendants)
        
        {a, a^2, a^3, ba, a^3b(a^2), a^3(b^2)a}
        
        {a, a^2, a^3, ba, a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^7, ba, a^3b(a^2)}
        
        {a, a^2, a^3, ba, a^3b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, ba, a^3(b^2)a} (3 descendants)
        
        {a, a^2, a^3, ba, a^2b(a^3), a^3(b^2)a}
        
        {a, a^2, a^3, a^7, ba, a^3(b^2)a}
        
        {a, a^2, a^3, ba, a^3b(a^3), a^3(b^2)a}
      - {a, a^2, a^3, ba, a^2b(a^3)} (2 descendants)
        
        {a, a^2, a^3, a^7, ba, a^2b(a^3)}
        
        {a, a^2, a^3, ba, a^2b(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^7, ba} (1 descendant)
        
        {a, a^2, a^3, a^7, ba, a^3b(a^3)}
      - {a, a^2, a^3, ba, a^3b(a^3)} (0 descendants)
    - {a, a^2, ba, a^2b} (16 descendants)
      - {a, a^2, ba, a^2b, aba} (20 descendants)
        
        {a, a^2, ba, b(a^2), a^2b, aba}
        
        {a, a^2, ba, a^2b, b^2a, aba}
        
        {a, a^2, a^4, ba, a^2b, aba}
        
        {a, a^2, ba, a^2b, aba, a^2ba}
        
        {a, a^2, ba, a^2b, a^2(b^2), aba}
        
        {a, a^2, ba, a^2b, aba, ab(a^2)}
        
        {a, a^2, ba, a^2b, aba, a(b^2)a}
        
        {a, a^2, ba, a^2b, aba, baba}
        
        {a, a^2, a^5, ba, a^2b, aba}
        
        {a, a^2, ba, a^2b, aba, a^3ba}
        
        {a, a^2, ba, a^2b, aba, a^2b(a^2)}
        
        {a, a^2, ba, a^2b, aba, a^2(b^2)a}
        
        {a, a^2, ba, a^2b, aba, ababa}
        
        {a, a^2, ba, a^2b, aba, a^4ba}
        
        {a, a^2, ba, a^2b, aba, a^2b(a^3)}
        
        {a, a^2, ba, a^2b, aba, a^2baba}
        
        {a, a^2, ba, a^2b, aba, a^2(b^2)(a^2)}
        
        {a, a^2, ba, a^2b, aba, a^2(b^3)a}
        
        {a, a^2, ba, a^2b, aba, a^2b(a^2)ba}
        
        {a, a^2, ba, a^2b, aba, a^2(b^2)aba}
      - {a, a^2, ba, b(a^2), a^2b} (20 descendants)
        
        {a, a^2, ba, b(a^2), a^2b, b^2a}
        
        {a, a^2, a^4, ba, b(a^2), a^2b}
        
        {a, a^2, ba, b(a^2), a^2b, a^2ba}
        
        {a, a^2, ba, b(a^2), a^2b, a^2(b^2)}
        
        {a, a^2, ba, b(a^2), a^2b, ab(a^2)}
        
        {a, a^2, ba, b(a^2), a^2b, a(b^2)a}
        
        {a, a^2, ba, b(a^2), a^2b, b(a^2)b}
        
        {a, a^2, ba, b(a^2), a^2b, b^2(a^2)}
        
        {a, a^2, a^5, ba, b(a^2), a^2b}
        
        {a, a^2, ba, b(a^2), a^2b, a^3ba}
        
        {a, a^2, ba, b(a^2), a^2b, a^2b(a^2)}
        
        {a, a^2, ba, b(a^2), a^2b, a^2(b^2)a}
        
        {a, a^2, ba, b(a^2), a^2b, a(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), a^2b, a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), a^2b, a^2b(a^3)}
        
        {a, a^2, ba, b(a^2), a^2b, a^2baba}
        
        {a, a^2, ba, b(a^2), a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), a^2b, a^2(b^3)a}
        
        {a, a^2, ba, b(a^2), a^2b, a^2bab(a^2)}
        
        {a, a^2, ba, b(a^2), a^2b, a^2(b^3)(a^2)}
      - {a, a^2, ba, a^2b, b^2a} (18 descendants)
        
        {a, a^2, a^4, ba, a^2b, b^2a}
        
        {a, a^2, ba, a^2b, b^2a, a^2ba}
        
        {a, a^2, ba, a^2b, a^2(b^2), b^2a}
        
        {a, a^2, ba, a^2b, b^2a, ab(a^2)}
        
        {a, a^2, ba, a^2b, b^2a, a(b^2)a}
        
        {a, a^2, ba, a^2b, b^2a, b^3a}
        
        {a, a^2, a^5, ba, a^2b, b^2a}
        
        {a, a^2, ba, a^2b, b^2a, a^3ba}
        
        {a, a^2, ba, a^2b, b^2a, a^2b(a^2)}
        
        {a, a^2, ba, a^2b, b^2a, a^2(b^2)a}
        
        {a, a^2, ba, a^2b, b^2a, a(b^3)a}
        
        {a, a^2, ba, a^2b, b^2a, a^3(b^2)a}
        
        {a, a^2, ba, a^2b, b^2a, a^2b(a^3)}
        
        {a, a^2, ba, a^2b, b^2a, a^2baba}
        
        {a, a^2, ba, a^2b, b^2a, a^2(b^2)(a^2)}
        
        {a, a^2, ba, a^2b, b^2a, a^2(b^3)a}
        
        {a, a^2, ba, a^2b, b^2a, a^2ba(b^2)a}
        
        {a, a^2, ba, a^2b, b^2a, a^2(b^4)a}
      - {a, a^2, a^4, ba, a^2b} (14 descendants)
        
        {a, a^2, a^4, ba, a^2b, a^2ba}
        
        {a, a^2, a^4, ba, a^2b, a^2(b^2)}
        
        {a, a^2, a^4, ba, a^2b, ab(a^2)}
        
        {a, a^2, a^4, ba, a^2b, a(b^2)a}
        
        {a, a^2, a^4, a^5, ba, a^2b}
        
        {a, a^2, a^4, ba, a^2b, a^3ba}
        
        {a, a^2, a^4, ba, a^2b, a^2b(a^2)}
        
        {a, a^2, a^4, ba, a^2b, a^2(b^2)a}
        
        {a, a^2, a^4, ba, b(a^4), a^2b}
        
        {a, a^2, a^4, ba, a^2b, a^2b(a^3)}
        
        {a, a^2, a^4, ba, a^2b, a^2baba}
        
        {a, a^2, a^4, ba, a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^4, ba, a^2b, a^2(b^3)a}
        
        {a, a^2, a^4, a^7, ba, a^2b}
      - {a, a^2, ba, a^2b, a^2ba} (17 descendants)
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2ba}
        
        {a, a^2, ba, a^2b, ab(a^2), a^2ba}
        
        {a, a^2, ba, a^2b, a(b^2)a, a^2ba}
        
        {a, a^2, a^5, ba, a^2b, a^2ba}
        
        {a, a^2, ba, a^2b, a^2ba, a^3ba}
        
        {a, a^2, ba, a^2b, a^2ba, a^2b(a^2)}
        
        {a, a^2, ba, a^2b, a^2ba, a^2bab}
        
        {a, a^2, ba, a^2b, a^2ba, a^2(b^2)a}
        
        {a, a^2, ba, a^2b, a^2ba, b(a^2)ba}
        
        {a, a^2, ba, a^2b, a^2ba, a^2b(a^3)}
        
        {a, a^2, ba, a^2b, a^2ba, a^2baba}
        
        {a, a^2, ba, a^2b, a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, ba, a^2b, a^2ba, a^2(b^3)a}
        
        {a, a^2, ba, a^2b, a^2ba, a^2b(a^4)}
        
        {a, a^2, ba, a^2b, a^2ba, a^2b(a^2)ba}
        
        {a, a^2, ba, a^2b, a^2ba, a^2bab(a^2)}
        
        {a, a^2, ba, a^2b, a^2ba, a^2ba(b^2)a}
      - {a, a^2, ba, a^2b, a^2(b^2)} (15 descendants)
        
        {a, a^2, ba, a^2b, a^2(b^2), ab(a^2)}
        
        {a, a^2, ba, a^2b, a^2(b^2), a(b^2)a}
        
        {a, a^2, a^5, ba, a^2b, a^2(b^2)}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^3ba}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2b(a^2)}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2(b^2)a}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2(b^3)}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2b(a^3)}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2baba}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2(b^2)(a^2)}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2(b^3)a}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2(b^2)(a^3)}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2(b^2)aba}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2(b^3)(a^2)}
        
        {a, a^2, ba, a^2b, a^2(b^2), a^2(b^4)a}
      - {a, a^2, ba, a^2b, ab(a^2)} (10 descendants)
        
        {a, a^2, ba, a^2b, ab(a^2), a(b^2)a}
        
        {a, a^2, a^5, ba, a^2b, ab(a^2)}
        
        {a, a^2, ba, a^2b, ab(a^2), a^3ba}
        
        {a, a^2, ba, a^2b, ab(a^2), a^2b(a^2)}
        
        {a, a^2, ba, a^2b, ab(a^2), a^2(b^2)a}
        
        {a, a^2, ba, a^2b, ab(a^2), bab(a^2)}
        
        {a, a^2, ba, a^2b, ab(a^2), a^2b(a^3)}
        
        {a, a^2, ba, a^2b, ab(a^2), a^2baba}
        
        {a, a^2, ba, a^2b, ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ba, a^2b, ab(a^2), a^2(b^3)a}
      - {a, a^2, ba, a^2b, a(b^2)a} (9 descendants)
        
        {a, a^2, a^5, ba, a^2b, a(b^2)a}
        
        {a, a^2, ba, a^2b, a(b^2)a, a^3ba}
        
        {a, a^2, ba, a^2b, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ba, a^2b, a(b^2)a, a^2(b^2)a}
        
        {a, a^2, ba, a^2b, a(b^2)a, ba(b^2)a}
        
        {a, a^2, ba, a^2b, a(b^2)a, a^2b(a^3)}
        
        {a, a^2, ba, a^2b, a(b^2)a, a^2baba}
        
        {a, a^2, ba, a^2b, a(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, ba, a^2b, a(b^2)a, a^2(b^3)a}
      - {a, a^2, a^5, ba, a^2b} (7 descendants)
        
        {a, a^2, a^5, ba, a^2b, a^3ba}
        
        {a, a^2, a^5, ba, a^2b, a^2b(a^2)}
        
        {a, a^2, a^5, ba, a^2b, a^2(b^2)a}
        
        {a, a^2, a^5, ba, a^2b, a^2b(a^3)}
        
        {a, a^2, a^5, ba, a^2b, a^2baba}
        
        {a, a^2, a^5, ba, a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^5, ba, a^2b, a^2(b^3)a}
      - {a, a^2, ba, a^2b, a^3ba} (6 descendants)
        
        {a, a^2, ba, a^2b, a^2b(a^2), a^3ba}
        
        {a, a^2, ba, a^2b, a^2(b^2)a, a^3ba}
        
        {a, a^2, ba, a^2b, a^2b(a^3), a^3ba}
        
        {a, a^2, ba, a^2b, a^3ba, a^2baba}
        
        {a, a^2, ba, a^2b, a^2(b^2)(a^2), a^3ba}
        
        {a, a^2, ba, a^2b, a^2(b^3)a, a^3ba}
      - {a, a^2, ba, a^2b, a^2b(a^2)} (5 descendants)
        
        {a, a^2, ba, a^2b, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, ba, a^2b, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, ba, a^2b, a^2b(a^2), a^2baba}
        
        {a, a^2, ba, a^2b, a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ba, a^2b, a^2b(a^2), a^2(b^3)a}
      - {a, a^2, ba, a^2b, a^2(b^2)a} (4 descendants)
        
        {a, a^2, ba, a^2b, a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, ba, a^2b, a^2(b^2)a, a^2baba}
        
        {a, a^2, ba, a^2b, a^2(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, ba, a^2b, a^2(b^2)a, a^2(b^3)a}
      - {a, a^2, ba, a^2b, a^2b(a^3)} (3 descendants)
        
        {a, a^2, ba, a^2b, a^2b(a^3), a^2baba}
        
        {a, a^2, ba, a^2b, a^2b(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, ba, a^2b, a^2b(a^3), a^2(b^3)a}
      - {a, a^2, ba, a^2b, a^2baba} (2 descendants)
        
        {a, a^2, ba, a^2b, a^2(b^2)(a^2), a^2baba}
        
        {a, a^2, ba, a^2b, a^2(b^3)a, a^2baba}
      - {a, a^2, ba, a^2b, a^2(b^2)(a^2)} (1 descendant)
        
        {a, a^2, ba, a^2b, a^2(b^2)(a^2), a^2(b^3)a}
      - {a, a^2, ba, a^2b, a^2(b^3)a} (0 descendants)
    - {a, a^2, ba, aba} (14 descendants)
      - {a, a^2, ba, b(a^2), aba} (17 descendants)
        
        {a, a^2, ba, b(a^2), b^2a, aba}
        
        {a, a^2, a^4, ba, b(a^2), aba}
        
        {a, a^2, ba, b(a^2), aba, a^2ba}
        
        {a, a^2, ba, b(a^2), aba, ab(a^2)}
        
        {a, a^2, ba, b(a^2), aba, a(b^2)a}
        
        {a, a^2, ba, b(a^2), aba, baba}
        
        {a, a^2, ba, b(a^2), b^2(a^2), aba}
        
        {a, a^2, a^5, ba, b(a^2), aba}
        
        {a, a^2, ba, b(a^2), aba, a^3ba}
        
        {a, a^2, ba, b(a^2), aba, a^2b(a^2)}
        
        {a, a^2, ba, b(a^2), aba, a^2(b^2)a}
        
        {a, a^2, ba, b(a^2), aba, ababa}
        
        {a, a^2, ba, b(a^2), aba, a(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), aba, a^4ba}
        
        {a, a^2, ba, b(a^2), aba, a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), aba, a^2baba}
        
        {a, a^2, ba, b(a^2), aba, a^2(b^2)(a^2)}
      - {a, a^2, ba, b^2a, aba} (16 descendants)
        
        {a, a^2, a^4, ba, b^2a, aba}
        
        {a, a^2, ba, b^2a, aba, a^2ba}
        
        {a, a^2, ba, b^2a, aba, ab(a^2)}
        
        {a, a^2, ba, b^2a, aba, a(b^2)a}
        
        {a, a^2, ba, b^2a, aba, baba}
        
        {a, a^2, ba, b^2a, b^3a, aba}
        
        {a, a^2, a^5, ba, b^2a, aba}
        
        {a, a^2, ba, b^2a, aba, a^3ba}
        
        {a, a^2, ba, b^2a, aba, a^2b(a^2)}
        
        {a, a^2, ba, b^2a, aba, a^2(b^2)a}
        
        {a, a^2, ba, b^2a, aba, ababa}
        
        {a, a^2, ba, b^2a, aba, a(b^3)a}
        
        {a, a^2, ba, b^2a, aba, a^4ba}
        
        {a, a^2, ba, b^2a, aba, a^3(b^2)a}
        
        {a, a^2, ba, b^2a, aba, a^2baba}
        
        {a, a^2, ba, b^2a, aba, a^2(b^3)a}
      - {a, a^2, a^4, ba, aba} (14 descendants)
        
        {a, a^2, a^4, ba, aba, a^2ba}
        
        {a, a^2, a^4, ba, aba, ab(a^2)}
        
        {a, a^2, a^4, ba, aba, a(b^2)a}
        
        {a, a^2, a^4, ba, aba, baba}
        
        {a, a^2, a^4, a^5, ba, aba}
        
        {a, a^2, a^4, ba, aba, a^3ba}
        
        {a, a^2, a^4, ba, aba, a^2b(a^2)}
        
        {a, a^2, a^4, ba, aba, a^2(b^2)a}
        
        {a, a^2, a^4, ba, aba, ababa}
        
        {a, a^2, a^4, ba, b(a^4), aba}
        
        {a, a^2, a^4, ba, aba, a^4ba}
        
        {a, a^2, a^4, ba, aba, a^2baba}
        
        {a, a^2, a^4, ba, aba, ab(a^4)}
        
        {a, a^2, a^4, a^7, ba, aba}
      - {a, a^2, ba, aba, a^2ba} (14 descendants)
        
        {a, a^2, ba, aba, ab(a^2), a^2ba}
        
        {a, a^2, ba, aba, a(b^2)a, a^2ba}
        
        {a, a^2, ba, aba, a^2ba, baba}
        
        {a, a^2, a^5, ba, aba, a^2ba}
        
        {a, a^2, ba, aba, a^2ba, a^3ba}
        
        {a, a^2, ba, aba, a^2ba, a^2b(a^2)}
        
        {a, a^2, ba, aba, a^2ba, a^2(b^2)a}
        
        {a, a^2, ba, aba, a^2ba, ababa}
        
        {a, a^2, ba, aba, a^2ba, b(a^2)ba}
        
        {a, a^2, ba, aba, a^2ba, a^4ba}
        
        {a, a^2, ba, aba, a^2ba, a^2baba}
        
        {a, a^2, ba, aba, a^2ba, ab(a^2)ba}
        
        {a, a^2, ba, aba, a^2ba, a^5ba}
        
        {a, a^2, ba, aba, a^2ba, a^2b(a^2)ba}
      - {a, a^2, ba, aba, ab(a^2)} (11 descendants)
        
        {a, a^2, ba, aba, ab(a^2), a(b^2)a}
        
        {a, a^2, ba, aba, ab(a^2), baba}
        
        {a, a^2, a^5, ba, aba, ab(a^2)}
        
        {a, a^2, ba, aba, ab(a^2), a^3ba}
        
        {a, a^2, ba, aba, ab(a^2), a^2b(a^2)}
        
        {a, a^2, ba, aba, ab(a^2), a^2(b^2)a}
        
        {a, a^2, ba, aba, ab(a^2), ababa}
        
        {a, a^2, ba, aba, ab(a^2), bab(a^2)}
        
        {a, a^2, ba, aba, ab(a^2), a^4ba}
        
        {a, a^2, ba, aba, ab(a^2), a^2baba}
        
        {a, a^2, ba, aba, ab(a^2), abab(a^2)}
      - {a, a^2, ba, aba, a(b^2)a} (10 descendants)
        
        {a, a^2, ba, aba, a(b^2)a, baba}
        
        {a, a^2, a^5, ba, aba, a(b^2)a}
        
        {a, a^2, ba, aba, a(b^2)a, a^3ba}
        
        {a, a^2, ba, aba, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ba, aba, a(b^2)a, a^2(b^2)a}
        
        {a, a^2, ba, aba, a(b^2)a, ababa}
        
        {a, a^2, ba, aba, a(b^2)a, ba(b^2)a}
        
        {a, a^2, ba, aba, a(b^2)a, a^4ba}
        
        {a, a^2, ba, aba, a(b^2)a, a^2baba}
        
        {a, a^2, ba, aba, a(b^2)a, aba(b^2)a}
      - {a, a^2, ba, aba, baba} (11 descendants)
        
        {a, a^2, a^5, ba, aba, baba}
        
        {a, a^2, ba, aba, a^3ba, baba}
        
        {a, a^2, ba, aba, a^2b(a^2), baba}
        
        {a, a^2, ba, aba, a^2(b^2)a, baba}
        
        {a, a^2, ba, aba, baba, ababa}
        
        {a, a^2, ba, aba, baba, b^2aba}
        
        {a, a^2, ba, aba, a^4ba, baba}
        
        {a, a^2, ba, aba, baba, a^2baba}
        
        {a, a^2, ba, aba, baba, a(b^2)aba}
        
        {a, a^2, ba, aba, baba, a^3baba}
        
        {a, a^2, ba, aba, baba, a^2(b^2)aba}
      - {a, a^2, a^5, ba, aba} (6 descendants)
        
        {a, a^2, a^5, ba, aba, a^3ba}
        
        {a, a^2, a^5, ba, aba, a^2b(a^2)}
        
        {a, a^2, a^5, ba, aba, a^2(b^2)a}
        
        {a, a^2, a^5, ba, aba, ababa}
        
        {a, a^2, a^5, ba, aba, a^4ba}
        
        {a, a^2, a^5, ba, aba, a^2baba}
      - {a, a^2, ba, aba, a^3ba} (7 descendants)
        
        {a, a^2, ba, aba, a^2b(a^2), a^3ba}
        
        {a, a^2, ba, aba, a^2(b^2)a, a^3ba}
        
        {a, a^2, ba, aba, a^3ba, ababa}
        
        {a, a^2, ba, aba, a^3ba, a^4ba}
        
        {a, a^2, ba, aba, a^3ba, a^2baba}
        
        {a, a^2, ba, aba, a^3ba, b(a^3)ba}
        
        {a, a^2, ba, aba, a^3ba, ab(a^3)ba}
      - {a, a^2, ba, aba, a^2b(a^2)} (4 descendants)
        
        {a, a^2, ba, aba, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, ba, aba, a^2b(a^2), ababa}
        
        {a, a^2, ba, aba, a^2b(a^2), a^4ba}
        
        {a, a^2, ba, aba, a^2b(a^2), a^2baba}
      - {a, a^2, ba, aba, a^2(b^2)a} (3 descendants)
        
        {a, a^2, ba, aba, a^2(b^2)a, ababa}
        
        {a, a^2, ba, aba, a^2(b^2)a, a^4ba}
        
        {a, a^2, ba, aba, a^2(b^2)a, a^2baba}
      - {a, a^2, ba, aba, ababa} (4 descendants)
        
        {a, a^2, ba, aba, a^4ba, ababa}
        
        {a, a^2, ba, aba, ababa, a^2baba}
        
        {a, a^2, ba, aba, ababa, bababa}
        
        {a, a^2, ba, aba, ababa, abababa}
      - {a, a^2, ba, aba, a^4ba} (1 descendant)
        
        {a, a^2, ba, aba, a^4ba, a^2baba}
      - {a, a^2, ba, aba, a^2baba} (0 descendants)
    - {a, a^2, ba, b(a^2)} (13 descendants)
      - {a, a^2, ba, b(a^2), b^2a} (16 descendants)
        
        {a, a^2, a^4, ba, b(a^2), b^2a}
        
        {a, a^2, ba, b(a^2), b^2a, a^2ba}
        
        {a, a^2, ba, b(a^2), b^2a, ab(a^2)}
        
        {a, a^2, ba, b(a^2), b^2a, a(b^2)a}
        
        {a, a^2, ba, b(a^2), b^2a, b^2(a^2)}
        
        {a, a^2, ba, b(a^2), b^2a, b^3a}
        
        {a, a^2, a^5, ba, b(a^2), b^2a}
        
        {a, a^2, ba, b(a^2), b^2a, a^3ba}
        
        {a, a^2, ba, b(a^2), b^2a, a^2b(a^2)}
        
        {a, a^2, ba, b(a^2), b^2a, a^2(b^2)a}
        
        {a, a^2, ba, b(a^2), b^2a, a(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), b^2a, a(b^3)a}
        
        {a, a^2, ba, b(a^2), b^2a, a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), b^2a, a^3(b^2)a}
        
        {a, a^2, ba, b(a^2), b^2a, a^2(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), b^2a, a^2(b^3)a}
      - {a, a^2, a^4, ba, b(a^2)} (13 descendants)
        
        {a, a^2, a^4, ba, b(a^2), a^2ba}
        
        {a, a^2, a^4, ba, b(a^2), ab(a^2)}
        
        {a, a^2, a^4, ba, b(a^2), a(b^2)a}
        
        {a, a^2, a^4, ba, b(a^2), b^2(a^2)}
        
        {a, a^2, a^4, a^5, ba, b(a^2)}
        
        {a, a^2, a^4, ba, b(a^2), a^3ba}
        
        {a, a^2, a^4, ba, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, ba, b(a^2), a^2(b^2)a}
        
        {a, a^2, a^4, ba, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^4, ba, b(a^2), b(a^4)}
        
        {a, a^2, a^4, ba, b(a^2), a^3b(a^2)}
        
        {a, a^2, a^4, ba, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, ba, b(a^2)}
      - {a, a^2, ba, b(a^2), a^2ba} (12 descendants)
        
        {a, a^2, ba, b(a^2), ab(a^2), a^2ba}
        
        {a, a^2, ba, b(a^2), a(b^2)a, a^2ba}
        
        {a, a^2, ba, b(a^2), b^2(a^2), a^2ba}
        
        {a, a^2, a^5, ba, b(a^2), a^2ba}
        
        {a, a^2, ba, b(a^2), a^2ba, a^3ba}
        
        {a, a^2, ba, b(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, ba, b(a^2), a^2ba, a^2(b^2)a}
        
        {a, a^2, ba, b(a^2), a(b^2)(a^2), a^2ba}
        
        {a, a^2, ba, b(a^2), a^2ba, b(a^2)ba}
        
        {a, a^2, ba, b(a^2), a^2ba, a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), a^2ba, a^2b(a^2)ba}
      - {a, a^2, ba, b(a^2), ab(a^2)} (13 descendants)
        
        {a, a^2, ba, b(a^2), ab(a^2), a(b^2)a}
        
        {a, a^2, ba, b(a^2), b^2(a^2), ab(a^2)}
        
        {a, a^2, a^5, ba, b(a^2), ab(a^2)}
        
        {a, a^2, ba, b(a^2), ab(a^2), a^3ba}
        
        {a, a^2, ba, b(a^2), ab(a^2), a^2b(a^2)}
        
        {a, a^2, ba, b(a^2), ab(a^2), a^2(b^2)a}
        
        {a, a^2, ba, b(a^2), ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), ab(a^2), bab(a^2)}
        
        {a, a^2, ba, b(a^2), ab(a^2), a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), ab(a^2), abab(a^2)}
        
        {a, a^2, ba, b(a^2), ab(a^2), a^4b(a^2)}
        
        {a, a^2, ba, b(a^2), ab(a^2), a^2bab(a^2)}
      - {a, a^2, ba, b(a^2), a(b^2)a} (9 descendants)
        
        {a, a^2, ba, b(a^2), b^2(a^2), a(b^2)a}
        
        {a, a^2, a^5, ba, b(a^2), a(b^2)a}
        
        {a, a^2, ba, b(a^2), a(b^2)a, a^3ba}
        
        {a, a^2, ba, b(a^2), a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ba, b(a^2), a(b^2)a, a^2(b^2)a}
        
        {a, a^2, ba, b(a^2), a(b^2)a, a(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), a(b^2)a, ba(b^2)a}
        
        {a, a^2, ba, b(a^2), a(b^2)a, a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), a(b^2)a, a^2(b^2)(a^2)}
      - {a, a^2, ba, b(a^2), b^2(a^2)} (11 descendants)
        
        {a, a^2, a^5, ba, b(a^2), b^2(a^2)}
        
        {a, a^2, ba, b(a^2), b^2(a^2), a^3ba}
        
        {a, a^2, ba, b(a^2), b^2(a^2), a^2b(a^2)}
        
        {a, a^2, ba, b(a^2), b^2(a^2), a^2(b^2)a}
        
        {a, a^2, ba, b(a^2), b^2(a^2), a(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), b^2(a^2), b^3(a^2)}
        
        {a, a^2, ba, b(a^2), b^2(a^2), a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), b^2(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), b^2(a^2), a(b^3)(a^2)}
        
        {a, a^2, ba, b(a^2), b^2(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), b^2(a^2), a^2(b^3)(a^2)}
      - {a, a^2, a^5, ba, b(a^2)} (7 descendants)
        
        {a, a^2, a^5, ba, b(a^2), a^3ba}
        
        {a, a^2, a^5, ba, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^5, ba, b(a^2), a^2(b^2)a}
        
        {a, a^2, a^5, ba, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^5, ba, b(a^2), a^3b(a^2)}
        
        {a, a^2, a^5, ba, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^5, ba, b(a^2), b(a^5)}
      - {a, a^2, ba, b(a^2), a^3ba} (6 descendants)
        
        {a, a^2, ba, b(a^2), a^2b(a^2), a^3ba}
        
        {a, a^2, ba, b(a^2), a^2(b^2)a, a^3ba}
        
        {a, a^2, ba, b(a^2), a(b^2)(a^2), a^3ba}
        
        {a, a^2, ba, b(a^2), a^3ba, a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), a^2(b^2)(a^2), a^3ba}
        
        {a, a^2, ba, b(a^2), a^3ba, b(a^3)ba}
      - {a, a^2, ba, b(a^2), a^2b(a^2)} (5 descendants)
        
        {a, a^2, ba, b(a^2), a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, ba, b(a^2), a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, ba, b(a^2), a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), a^2b(a^2), b(a^2)b(a^2)}
      - {a, a^2, ba, b(a^2), a^2(b^2)a} (4 descendants)
        
        {a, a^2, ba, b(a^2), a(b^2)(a^2), a^2(b^2)a}
        
        {a, a^2, ba, b(a^2), a^2(b^2)a, a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), a^2(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), a^2(b^2)a, b(a^2)(b^2)a}
      - {a, a^2, ba, b(a^2), a(b^2)(a^2)} (3 descendants)
        
        {a, a^2, ba, b(a^2), a(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), a(b^2)(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, ba, b(a^2), a(b^2)(a^2), ba(b^2)(a^2)}
      - {a, a^2, ba, b(a^2), a^3b(a^2)} (2 descendants)
        
        {a, a^2, ba, b(a^2), a^2(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, ba, b(a^2), a^3b(a^2), b(a^3)b(a^2)}
      - {a, a^2, ba, b(a^2), a^2(b^2)(a^2)} (1 descendant)
        
        {a, a^2, ba, b(a^2), a^2(b^2)(a^2), b(a^2)(b^2)(a^2)}
    - {a, a^2, ba, b^2a} (12 descendants)
      - {a, a^2, a^4, ba, b^2a} (13 descendants)
        
        {a, a^2, a^4, ba, b^2a, a^2ba}
        
        {a, a^2, a^4, ba, b^2a, ab(a^2)}
        
        {a, a^2, a^4, ba, b^2a, a(b^2)a}
        
        {a, a^2, a^4, ba, b^2a, b^3a}
        
        {a, a^2, a^4, a^5, ba, b^2a}
        
        {a, a^2, a^4, ba, b^2a, a^3ba}
        
        {a, a^2, a^4, ba, b^2a, a^2b(a^2)}
        
        {a, a^2, a^4, ba, b^2a, a^2(b^2)a}
        
        {a, a^2, a^4, ba, b^2a, a(b^3)a}
        
        {a, a^2, a^4, ba, b(a^4), b^2a}
        
        {a, a^2, a^4, ba, b^2a, a^3(b^2)a}
        
        {a, a^2, a^4, ba, b^2a, a^2(b^3)a}
        
        {a, a^2, a^4, a^7, ba, b^2a}
      - {a, a^2, ba, b^2a, a^2ba} (12 descendants)
        
        {a, a^2, ba, b^2a, ab(a^2), a^2ba}
        
        {a, a^2, ba, b^2a, a(b^2)a, a^2ba}
        
        {a, a^2, ba, b^2a, b^3a, a^2ba}
        
        {a, a^2, a^5, ba, b^2a, a^2ba}
        
        {a, a^2, ba, b^2a, a^2ba, a^3ba}
        
        {a, a^2, ba, b^2a, a^2ba, a^2b(a^2)}
        
        {a, a^2, ba, b^2a, a^2ba, a^2(b^2)a}
        
        {a, a^2, ba, b^2a, a(b^3)a, a^2ba}
        
        {a, a^2, ba, b^2a, a^2ba, b(a^2)ba}
        
        {a, a^2, ba, b^2a, a^2ba, a^3(b^2)a}
        
        {a, a^2, ba, b^2a, a^2ba, a^2(b^3)a}
        
        {a, a^2, ba, b^2a, a^2ba, a^2b(a^2)ba}
      - {a, a^2, ba, b^2a, ab(a^2)} (10 descendants)
        
        {a, a^2, ba, b^2a, ab(a^2), a(b^2)a}
        
        {a, a^2, ba, b^2a, b^3a, ab(a^2)}
        
        {a, a^2, a^5, ba, b^2a, ab(a^2)}
        
        {a, a^2, ba, b^2a, ab(a^2), a^3ba}
        
        {a, a^2, ba, b^2a, ab(a^2), a^2b(a^2)}
        
        {a, a^2, ba, b^2a, ab(a^2), a^2(b^2)a}
        
        {a, a^2, ba, b^2a, ab(a^2), a(b^3)a}
        
        {a, a^2, ba, b^2a, ab(a^2), bab(a^2)}
        
        {a, a^2, ba, b^2a, ab(a^2), a^3(b^2)a}
        
        {a, a^2, ba, b^2a, ab(a^2), a^2(b^3)a}
      - {a, a^2, ba, b^2a, a(b^2)a} (12 descendants)
        
        {a, a^2, ba, b^2a, b^3a, a(b^2)a}
        
        {a, a^2, a^5, ba, b^2a, a(b^2)a}
        
        {a, a^2, ba, b^2a, a(b^2)a, a^3ba}
        
        {a, a^2, ba, b^2a, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ba, b^2a, a(b^2)a, a^2(b^2)a}
        
        {a, a^2, ba, b^2a, a(b^2)a, a(b^3)a}
        
        {a, a^2, ba, b^2a, a(b^2)a, ba(b^2)a}
        
        {a, a^2, ba, b^2a, a(b^2)a, a^3(b^2)a}
        
        {a, a^2, ba, b^2a, a(b^2)a, a^2(b^3)a}
        
        {a, a^2, ba, b^2a, a(b^2)a, aba(b^2)a}
        
        {a, a^2, ba, b^2a, a(b^2)a, a^4(b^2)a}
        
        {a, a^2, ba, b^2a, a(b^2)a, a^2ba(b^2)a}
      - {a, a^2, ba, b^2a, b^3a} (11 descendants)
        
        {a, a^2, a^5, ba, b^2a, b^3a}
        
        {a, a^2, ba, b^2a, b^3a, a^3ba}
        
        {a, a^2, ba, b^2a, b^3a, a^2b(a^2)}
        
        {a, a^2, ba, b^2a, b^3a, a^2(b^2)a}
        
        {a, a^2, ba, b^2a, b^3a, a(b^3)a}
        
        {a, a^2, ba, b^2a, b^3a, b^4a}
        
        {a, a^2, ba, b^2a, b^3a, a^3(b^2)a}
        
        {a, a^2, ba, b^2a, b^3a, a^2(b^3)a}
        
        {a, a^2, ba, b^2a, b^3a, a(b^4)a}
        
        {a, a^2, ba, b^2a, b^3a, a^3(b^3)a}
        
        {a, a^2, ba, b^2a, b^3a, a^2(b^4)a}
      - {a, a^2, a^5, ba, b^2a} (6 descendants)
        
        {a, a^2, a^5, ba, b^2a, a^3ba}
        
        {a, a^2, a^5, ba, b^2a, a^2b(a^2)}
        
        {a, a^2, a^5, ba, b^2a, a^2(b^2)a}
        
        {a, a^2, a^5, ba, b^2a, a(b^3)a}
        
        {a, a^2, a^5, ba, b^2a, a^3(b^2)a}
        
        {a, a^2, a^5, ba, b^2a, a^2(b^3)a}
      - {a, a^2, ba, b^2a, a^3ba} (5 descendants)
        
        {a, a^2, ba, b^2a, a^2b(a^2), a^3ba}
        
        {a, a^2, ba, b^2a, a^2(b^2)a, a^3ba}
        
        {a, a^2, ba, b^2a, a(b^3)a, a^3ba}
        
        {a, a^2, ba, b^2a, a^3ba, a^3(b^2)a}
        
        {a, a^2, ba, b^2a, a^2(b^3)a, a^3ba}
      - {a, a^2, ba, b^2a, a^2b(a^2)} (4 descendants)
        
        {a, a^2, ba, b^2a, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, ba, b^2a, a(b^3)a, a^2b(a^2)}
        
        {a, a^2, ba, b^2a, a^2b(a^2), a^3(b^2)a}
        
        {a, a^2, ba, b^2a, a^2b(a^2), a^2(b^3)a}
      - {a, a^2, ba, b^2a, a^2(b^2)a} (4 descendants)
        
        {a, a^2, ba, b^2a, a(b^3)a, a^2(b^2)a}
        
        {a, a^2, ba, b^2a, a^2(b^2)a, a^3(b^2)a}
        
        {a, a^2, ba, b^2a, a^2(b^2)a, a^2(b^3)a}
        
        {a, a^2, ba, b^2a, a^2(b^2)a, b(a^2)(b^2)a}
      - {a, a^2, ba, b^2a, a(b^3)a} (3 descendants)
        
        {a, a^2, ba, b^2a, a(b^3)a, a^3(b^2)a}
        
        {a, a^2, ba, b^2a, a(b^3)a, a^2(b^3)a}
        
        {a, a^2, ba, b^2a, a(b^3)a, ba(b^3)a}
      - {a, a^2, ba, b^2a, a^3(b^2)a} (1 descendant)
        
        {a, a^2, ba, b^2a, a^2(b^3)a, a^3(b^2)a}
      - {a, a^2, ba, b^2a, a^2(b^3)a} (0 descendants)
    - {a, a^2, a^4, ba} (9 descendants)
      - {a, a^2, a^4, ba, a^2ba} (12 descendants)
        
        {a, a^2, a^4, ba, ab(a^2), a^2ba}
        
        {a, a^2, a^4, ba, a(b^2)a, a^2ba}
        
        {a, a^2, a^4, a^5, ba, a^2ba}
        
        {a, a^2, a^4, ba, a^2ba, a^3ba}
        
        {a, a^2, a^4, ba, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^4, ba, a^2ba, a^2(b^2)a}
        
        {a, a^2, a^4, ba, b(a^4), a^2ba}
        
        {a, a^2, a^4, ba, a^2ba, b(a^2)ba}
        
        {a, a^2, a^4, a^7, ba, a^2ba}
        
        {a, a^2, a^4, ba, a^2ba, a^5ba}
        
        {a, a^2, a^4, ba, a^2ba, a^2b(a^4)}
        
        {a, a^2, a^4, ba, a^2ba, a^2b(a^2)ba}
      - {a, a^2, a^4, ba, ab(a^2)} (9 descendants)
        
        {a, a^2, a^4, ba, ab(a^2), a(b^2)a}
        
        {a, a^2, a^4, a^5, ba, ab(a^2)}
        
        {a, a^2, a^4, ba, ab(a^2), a^3ba}
        
        {a, a^2, a^4, ba, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, ba, ab(a^2), a^2(b^2)a}
        
        {a, a^2, a^4, ba, b(a^4), ab(a^2)}
        
        {a, a^2, a^4, ba, ab(a^2), bab(a^2)}
        
        {a, a^2, a^4, a^7, ba, ab(a^2)}
        
        {a, a^2, a^4, ba, ab(a^2), a^4b(a^2)}
      - {a, a^2, a^4, ba, a(b^2)a} (8 descendants)
        
        {a, a^2, a^4, a^5, ba, a(b^2)a}
        
        {a, a^2, a^4, ba, a(b^2)a, a^3ba}
        
        {a, a^2, a^4, ba, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, a^4, ba, a(b^2)a, a^2(b^2)a}
        
        {a, a^2, a^4, ba, b(a^4), a(b^2)a}
        
        {a, a^2, a^4, ba, a(b^2)a, ba(b^2)a}
        
        {a, a^2, a^4, a^7, ba, a(b^2)a}
        
        {a, a^2, a^4, ba, a(b^2)a, a^4(b^2)a}
      - {a, a^2, a^4, a^5, ba} (6 descendants)
        
        {a, a^2, a^4, a^5, ba, a^3ba}
        
        {a, a^2, a^4, a^5, ba, a^2b(a^2)}
        
        {a, a^2, a^4, a^5, ba, a^2(b^2)a}
        
        {a, a^2, a^4, a^5, ba, b(a^4)}
        
        {a, a^2, a^4, a^5, a^7, ba}
        
        {a, a^2, a^4, a^5, a^8, ba}
      - {a, a^2, a^4, ba, a^3ba} (4 descendants)
        
        {a, a^2, a^4, ba, a^2b(a^2), a^3ba}
        
        {a, a^2, a^4, ba, a^2(b^2)a, a^3ba}
        
        {a, a^2, a^4, ba, b(a^4), a^3ba}
        
        {a, a^2, a^4, a^7, ba, a^3ba}
      - {a, a^2, a^4, ba, a^2b(a^2)} (3 descendants)
        
        {a, a^2, a^4, ba, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, a^4, ba, b(a^4), a^2b(a^2)}
        
        {a, a^2, a^4, a^7, ba, a^2b(a^2)}
      - {a, a^2, a^4, ba, a^2(b^2)a} (2 descendants)
        
        {a, a^2, a^4, ba, b(a^4), a^2(b^2)a}
        
        {a, a^2, a^4, a^7, ba, a^2(b^2)a}
      - {a, a^2, a^4, ba, b(a^4)} (1 descendant)
        
        {a, a^2, a^4, a^7, ba, b(a^4)}
      - {a, a^2, a^4, a^7, ba} (0 descendants)
    - {a, a^2, ba, a^2ba} (8 descendants)
      - {a, a^2, ba, ab(a^2), a^2ba} (9 descendants)
        
        {a, a^2, ba, ab(a^2), a(b^2)a, a^2ba}
        
        {a, a^2, a^5, ba, ab(a^2), a^2ba}
        
        {a, a^2, ba, ab(a^2), a^2ba, a^3ba}
        
        {a, a^2, ba, ab(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, ba, ab(a^2), a^2ba, a^2(b^2)a}
        
        {a, a^2, ba, ab(a^2), a^2ba, b(a^2)ba}
        
        {a, a^2, ba, ab(a^2), a^2ba, bab(a^2)}
        
        {a, a^2, ba, ab(a^2), a^2ba, a^2b(a^2)ba}
        
        {a, a^2, ba, ab(a^2), a^2ba, a^2bab(a^2)}
      - {a, a^2, ba, a(b^2)a, a^2ba} (8 descendants)
        
        {a, a^2, a^5, ba, a(b^2)a, a^2ba}
        
        {a, a^2, ba, a(b^2)a, a^2ba, a^3ba}
        
        {a, a^2, ba, a(b^2)a, a^2ba, a^2b(a^2)}
        
        {a, a^2, ba, a(b^2)a, a^2ba, a^2(b^2)a}
        
        {a, a^2, ba, a(b^2)a, a^2ba, b(a^2)ba}
        
        {a, a^2, ba, a(b^2)a, a^2ba, ba(b^2)a}
        
        {a, a^2, ba, a(b^2)a, a^2ba, a^2b(a^2)ba}
        
        {a, a^2, ba, a(b^2)a, a^2ba, a^2ba(b^2)a}
      - {a, a^2, a^5, ba, a^2ba} (5 descendants)
        
        {a, a^2, a^5, ba, a^2ba, a^3ba}
        
        {a, a^2, a^5, ba, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^5, ba, a^2ba, a^2(b^2)a}
        
        {a, a^2, a^5, ba, a^2ba, b(a^2)ba}
        
        {a, a^2, a^5, ba, a^2ba, a^2b(a^2)ba}
      - {a, a^2, ba, a^2ba, a^3ba} (4 descendants)
        
        {a, a^2, ba, a^2ba, a^2b(a^2), a^3ba}
        
        {a, a^2, ba, a^2ba, a^2(b^2)a, a^3ba}
        
        {a, a^2, ba, a^2ba, a^3ba, b(a^2)ba}
        
        {a, a^2, ba, a^2ba, a^3ba, a^2b(a^2)ba}
      - {a, a^2, ba, a^2ba, a^2b(a^2)} (4 descendants)
        
        {a, a^2, ba, a^2ba, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, ba, a^2ba, a^2b(a^2), b(a^2)ba}
        
        {a, a^2, ba, a^2ba, a^2b(a^2), a^2b(a^2)ba}
        
        {a, a^2, ba, a^2ba, a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, ba, a^2ba, a^2(b^2)a} (2 descendants)
        
        {a, a^2, ba, a^2ba, a^2(b^2)a, b(a^2)ba}
        
        {a, a^2, ba, a^2ba, a^2(b^2)a, a^2b(a^2)ba}
      - {a, a^2, ba, a^2ba, b(a^2)ba} (1 descendant)
        
        {a, a^2, ba, a^2ba, b(a^2)ba, a^2b(a^2)ba}
      - {a, a^2, ba, a^2ba, a^2b(a^2)ba} (0 descendants)
    - {a, a^2, ba, ab(a^2)} (6 descendants)
      - {a, a^2, ba, ab(a^2), a(b^2)a} (6 descendants)
        
        {a, a^2, a^5, ba, ab(a^2), a(b^2)a}
        
        {a, a^2, ba, ab(a^2), a(b^2)a, a^3ba}
        
        {a, a^2, ba, ab(a^2), a(b^2)a, a^2b(a^2)}
        
        {a, a^2, ba, ab(a^2), a(b^2)a, a^2(b^2)a}
        
        {a, a^2, ba, ab(a^2), a(b^2)a, bab(a^2)}
        
        {a, a^2, ba, ab(a^2), a(b^2)a, ba(b^2)a}
      - {a, a^2, a^5, ba, ab(a^2)} (4 descendants)
        
        {a, a^2, a^5, ba, ab(a^2), a^3ba}
        
        {a, a^2, a^5, ba, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^5, ba, ab(a^2), a^2(b^2)a}
        
        {a, a^2, a^5, ba, ab(a^2), bab(a^2)}
      - {a, a^2, ba, ab(a^2), a^3ba} (3 descendants)
        
        {a, a^2, ba, ab(a^2), a^2b(a^2), a^3ba}
        
        {a, a^2, ba, ab(a^2), a^2(b^2)a, a^3ba}
        
        {a, a^2, ba, ab(a^2), a^3ba, bab(a^2)}
      - {a, a^2, ba, ab(a^2), a^2b(a^2)} (4 descendants)
        
        {a, a^2, ba, ab(a^2), a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, ba, ab(a^2), a^2b(a^2), bab(a^2)}
        
        {a, a^2, ba, ab(a^2), a^2b(a^2), ab(a^2)b(a^2)}
        
        {a, a^2, ba, ab(a^2), a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, ba, ab(a^2), a^2(b^2)a} (1 descendant)
        
        {a, a^2, ba, ab(a^2), a^2(b^2)a, bab(a^2)}
      - {a, a^2, ba, ab(a^2), bab(a^2)} (0 descendants)
    - {a, a^2, ba, a(b^2)a} (5 descendants)
      - {a, a^2, a^5, ba, a(b^2)a} (4 descendants)
        
        {a, a^2, a^5, ba, a(b^2)a, a^3ba}
        
        {a, a^2, a^5, ba, a(b^2)a, a^2b(a^2)}
        
        {a, a^2, a^5, ba, a(b^2)a, a^2(b^2)a}
        
        {a, a^2, a^5, ba, a(b^2)a, ba(b^2)a}
      - {a, a^2, ba, a(b^2)a, a^3ba} (3 descendants)
        
        {a, a^2, ba, a(b^2)a, a^2b(a^2), a^3ba}
        
        {a, a^2, ba, a(b^2)a, a^2(b^2)a, a^3ba}
        
        {a, a^2, ba, a(b^2)a, a^3ba, ba(b^2)a}
      - {a, a^2, ba, a(b^2)a, a^2b(a^2)} (2 descendants)
        
        {a, a^2, ba, a(b^2)a, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, ba, a(b^2)a, a^2b(a^2), ba(b^2)a}
      - {a, a^2, ba, a(b^2)a, a^2(b^2)a} (1 descendant)
        
        {a, a^2, ba, a(b^2)a, a^2(b^2)a, ba(b^2)a}
      - {a, a^2, ba, a(b^2)a, ba(b^2)a} (1 descendant)
        
        {a, a^2, ba, a(b^2)a, ba(b^2)a, a(b^2)a(b^2)a}
    - {a, a^2, a^5, ba} (3 descendants)
      - {a, a^2, a^5, ba, a^3ba} (2 descendants)
        
        {a, a^2, a^5, ba, a^2b(a^2), a^3ba}
        
        {a, a^2, a^5, ba, a^2(b^2)a, a^3ba}
      - {a, a^2, a^5, ba, a^2b(a^2)} (1 descendant)
        
        {a, a^2, a^5, ba, a^2b(a^2), a^2(b^2)a}
      - {a, a^2, a^5, ba, a^2(b^2)a} (0 descendants)
    - {a, a^2, ba, a^3ba} (2 descendants)
      - {a, a^2, ba, a^2b(a^2), a^3ba} (1 descendant)
        
        {a, a^2, ba, a^2b(a^2), a^2(b^2)a, a^3ba}
      - {a, a^2, ba, a^2(b^2)a, a^3ba} (0 descendants)
    - {a, a^2, ba, a^2b(a^2)} (1 descendant)
      - {a, a^2, ba, a^2b(a^2), a^2(b^2)a} (0 descendants)
    - {a, a^2, ba, a^2(b^2)a} (0 descendants)
  - {a, a^2, a^3} (17 descendants)
    - {a, a^2, a^3, a^2b} (21 descendants)
      - {a, a^2, a^3, a^2b, aba} (21 descendants)
        
        {a, a^2, a^3, b(a^2), a^2b, aba}
        
        {a, a^2, a^3, a^4, a^2b, aba}
        
        {a, a^2, a^3, a^2b, a^3b, aba}
        
        {a, a^2, a^3, a^2b, aba, a^2ba}
        
        {a, a^2, a^3, a^2b, a^2(b^2), aba}
        
        {a, a^2, a^3, a^2b, aba, ab(a^2)}
        
        {a, a^2, a^3, b(a^3), a^2b, aba}
        
        {a, a^2, a^3, a^5, a^2b, aba}
        
        {a, a^2, a^3, a^2b, aba, a^3ba}
        
        {a, a^2, a^3, a^2b, aba, a^2b(a^2)}
        
        {a, a^2, a^3, a^2b, aba, a^2(b^2)a}
        
        {a, a^2, a^3, a^2b, aba, ab(a^3)}
        
        {a, a^2, a^3, a^2b, aba, ababa}
        
        {a, a^2, a^3, a^6, a^2b, aba}
        
        {a, a^2, a^3, a^2b, aba, a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, aba, a^2b(a^3)}
        
        {a, a^2, a^3, a^2b, aba, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, a^2b, aba}
        
        {a, a^2, a^3, a^2b, aba, a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, aba, a^2b(a^4)}
        
        {a, a^2, a^3, a^2b, aba, a^2(b^2)(a^3)}
      - {a, a^2, a^3, b(a^2), a^2b} (25 descendants)
        
        {a, a^2, a^3, a^4, b(a^2), a^2b}
        
        {a, a^2, a^3, b(a^2), a^2b, a^3b}
        
        {a, a^2, a^3, b(a^2), a^2b, a^2ba}
        
        {a, a^2, a^3, b(a^2), a^2b, a^2(b^2)}
        
        {a, a^2, a^3, b(a^2), a^2b, ab(a^2)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^2b}
        
        {a, a^2, a^3, b(a^2), a^2b, b^2(a^2)}
        
        {a, a^2, a^3, a^5, b(a^2), a^2b}
        
        {a, a^2, a^3, b(a^2), a^2b, a^3ba}
        
        {a, a^2, a^3, b(a^2), a^2b, a^2b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2b, a^2(b^2)a}
        
        {a, a^2, a^3, b(a^2), a^2b, ab(a^3)}
        
        {a, a^2, a^3, b(a^2), a^2b, a(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, b(a^2), a^2b}
        
        {a, a^2, a^3, b(a^2), a^2b, a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2b, a^2b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), a^2b}
        
        {a, a^2, a^3, b(a^2), a^2b, a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2b, a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^2b, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2b, a^2b(a^4)}
        
        {a, a^2, a^3, b(a^2), a^2b, a^2bab(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2b, a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^2), a^2b, a^2(b^3)(a^2)}
      - {a, a^2, a^3, a^4, a^2b} (30 descendants)
        
        {a, a^2, a^3, a^4, a^2b, a^3b}
        
        {a, a^2, a^3, a^4, a^2b, a^2ba}
        
        {a, a^2, a^3, a^4, a^2b, a^2(b^2)}
        
        {a, a^2, a^3, a^4, a^2b, ab(a^2)}
        
        {a, a^2, a^3, a^4, b(a^3), a^2b}
        
        {a, a^2, a^3, a^4, a^5, a^2b}
        
        {a, a^2, a^3, a^4, a^2b, a^4b}
        
        {a, a^2, a^3, a^4, a^2b, a^3ba}
        
        {a, a^2, a^3, a^4, a^2b, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b, a^2(b^2)a}
        
        {a, a^2, a^3, a^4, a^2b, ab(a^3)}
        
        {a, a^2, a^3, a^4, b(a^4), a^2b}
        
        {a, a^2, a^3, a^4, a^6, a^2b}
        
        {a, a^2, a^3, a^4, a^2b, a^4ba}
        
        {a, a^2, a^3, a^4, a^2b, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^4, a^2b, ab(a^4)}
        
        {a, a^2, a^3, a^4, a^7, a^2b}
        
        {a, a^2, a^3, a^4, a^2b, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^2b, a^2(b^2)(a^3)}
        
        {a, a^2, a^3, a^4, a^8, a^2b}
        
        {a, a^2, a^3, a^4, a^2b, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^2b, a^2b(a^5)}
        
        {a, a^2, a^3, a^4, a^2b, a^2(b^2)(a^4)}
        
        {a, a^2, a^3, a^4, a^9, a^2b}
        
        {a, a^2, a^3, a^4, a^2b, a^4b(a^4)}
      - {a, a^2, a^3, a^2b, a^3b} (22 descendants)
        
        {a, a^2, a^3, a^2b, a^3b, a^2ba}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^3b}
        
        {a, a^2, a^3, a^2b, a^3b, ab(a^2)}
        
        {a, a^2, a^3, b(a^3), a^2b, a^3b}
        
        {a, a^2, a^3, a^5, a^2b, a^3b}
        
        {a, a^2, a^3, a^2b, a^3b, a^3ba}
        
        {a, a^2, a^3, a^2b, a^3b, a^3(b^2)}
        
        {a, a^2, a^3, a^2b, a^3b, a^2b(a^2)}
        
        {a, a^2, a^3, a^2b, a^3b, a^2(b^2)a}
        
        {a, a^2, a^3, a^2b, a^3b, ab(a^3)}
        
        {a, a^2, a^3, a^6, a^2b, a^3b}
        
        {a, a^2, a^3, a^2b, a^3b, a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, a^3b, a^3(b^2)a}
        
        {a, a^2, a^3, a^2b, a^3b, a^2b(a^3)}
        
        {a, a^2, a^3, a^2b, a^3b, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, a^2b, a^3b}
        
        {a, a^2, a^3, a^2b, a^3b, a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, a^3b, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^2b, a^3b, a^2b(a^4)}
        
        {a, a^2, a^3, a^2b, a^3b, a^2(b^2)(a^3)}
        
        {a, a^2, a^3, a^2b, a^3b, a^3b(a^4)}
        
        {a, a^2, a^3, a^2b, a^3b, a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^2b, a^2ba} (21 descendants)
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2ba}
        
        {a, a^2, a^3, a^2b, ab(a^2), a^2ba}
        
        {a, a^2, a^3, b(a^3), a^2b, a^2ba}
        
        {a, a^2, a^3, a^5, a^2b, a^2ba}
        
        {a, a^2, a^3, a^2b, a^2ba, a^3ba}
        
        {a, a^2, a^3, a^2b, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, a^2b, a^2ba, a^2bab}
        
        {a, a^2, a^3, a^2b, a^2ba, a^2(b^2)a}
        
        {a, a^2, a^3, a^2b, ab(a^3), a^2ba}
        
        {a, a^2, a^3, a^6, a^2b, a^2ba}
        
        {a, a^2, a^3, a^2b, a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2ba, a^2baba}
        
        {a, a^2, a^3, a^2b, a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, a^2b, a^2ba}
        
        {a, a^2, a^3, a^2b, a^2ba, a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2ba, a^2b(a^4)}
        
        {a, a^2, a^3, a^2b, a^2ba, a^2bab(a^2)}
        
        {a, a^2, a^3, a^2b, a^2ba, a^2(b^2)(a^3)}
        
        {a, a^2, a^3, a^2b, a^2ba, a^2b(a^5)}
        
        {a, a^2, a^3, a^2b, a^2ba, a^2bab(a^3)}
      - {a, a^2, a^3, a^2b, a^2(b^2)} (20 descendants)
        
        {a, a^2, a^3, a^2b, a^2(b^2), ab(a^2)}
        
        {a, a^2, a^3, b(a^3), a^2b, a^2(b^2)}
        
        {a, a^2, a^3, a^5, a^2b, a^2(b^2)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^3ba}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2b(a^2)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2(b^2)a}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2(b^3)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), ab(a^3)}
        
        {a, a^2, a^3, a^6, a^2b, a^2(b^2)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2(b^3)a}
        
        {a, a^2, a^3, a^7, a^2b, a^2(b^2)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2b(a^4)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2(b^3)(a^2)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2(b^2)(a^4)}
        
        {a, a^2, a^3, a^2b, a^2(b^2), a^2(b^3)(a^3)}
      - {a, a^2, a^3, a^2b, ab(a^2)} (14 descendants)
        
        {a, a^2, a^3, b(a^3), a^2b, ab(a^2)}
        
        {a, a^2, a^3, a^5, a^2b, ab(a^2)}
        
        {a, a^2, a^3, a^2b, ab(a^2), a^3ba}
        
        {a, a^2, a^3, a^2b, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, a^2b, ab(a^2), a^2(b^2)a}
        
        {a, a^2, a^3, a^2b, ab(a^2), ab(a^3)}
        
        {a, a^2, a^3, a^6, a^2b, ab(a^2)}
        
        {a, a^2, a^3, a^2b, ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^2b, ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, a^2b, ab(a^2)}
        
        {a, a^2, a^3, a^2b, ab(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, ab(a^2), a^2b(a^4)}
        
        {a, a^2, a^3, a^2b, ab(a^2), a^2(b^2)(a^3)}
      - {a, a^2, a^3, b(a^3), a^2b} (19 descendants)
        
        {a, a^2, a^3, a^5, b(a^3), a^2b}
        
        {a, a^2, a^3, b(a^3), a^2b, a^3ba}
        
        {a, a^2, a^3, b(a^3), a^2b, a^2b(a^2)}
        
        {a, a^2, a^3, b(a^3), a^2b, a^2(b^2)a}
        
        {a, a^2, a^3, b(a^3), a^2b, ab(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b, b^2(a^3)}
        
        {a, a^2, a^3, a^6, b(a^3), a^2b}
        
        {a, a^2, a^3, b(a^3), a^2b, a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), a^2b, a^2b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^3), a^2b, a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, b(a^3), a^2b}
        
        {a, a^2, a^3, b(a^3), a^2b, a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b, a^2b(a^4)}
        
        {a, a^2, a^3, b(a^3), a^2b, a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b, a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b, a^3(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b, a^2bab(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b, a^2(b^3)(a^3)}
      - {a, a^2, a^3, a^5, a^2b} (13 descendants)
        
        {a, a^2, a^3, a^5, a^2b, a^3ba}
        
        {a, a^2, a^3, a^5, a^2b, a^2b(a^2)}
        
        {a, a^2, a^3, a^5, a^2b, a^2(b^2)a}
        
        {a, a^2, a^3, a^5, a^2b, ab(a^3)}
        
        {a, a^2, a^3, a^5, a^6, a^2b}
        
        {a, a^2, a^3, a^5, a^2b, a^3b(a^2)}
        
        {a, a^2, a^3, a^5, a^2b, a^2b(a^3)}
        
        {a, a^2, a^3, a^5, a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^5, a^7, a^2b}
        
        {a, a^2, a^3, a^5, a^2b, a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^2b, a^2b(a^4)}
        
        {a, a^2, a^3, a^5, a^2b, a^2(b^2)(a^3)}
        
        {a, a^2, a^3, a^5, a^9, a^2b}
      - {a, a^2, a^3, a^2b, a^3ba} (11 descendants)
        
        {a, a^2, a^3, a^2b, a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, a^2b, a^2(b^2)a, a^3ba}
        
        {a, a^2, a^3, a^2b, ab(a^3), a^3ba}
        
        {a, a^2, a^3, a^6, a^2b, a^3ba}
        
        {a, a^2, a^3, a^2b, a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^2b, a^2(b^2)(a^2), a^3ba}
        
        {a, a^2, a^3, a^7, a^2b, a^3ba}
        
        {a, a^2, a^3, a^2b, a^3ba, a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2b(a^4), a^3ba}
        
        {a, a^2, a^3, a^2b, a^2(b^2)(a^3), a^3ba}
      - {a, a^2, a^3, a^2b, a^2b(a^2)} (10 descendants)
        
        {a, a^2, a^3, a^2b, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, a^3, a^2b, ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, a^6, a^2b, a^2b(a^2)}
        
        {a, a^2, a^3, a^2b, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, a^2b, a^2b(a^2)}
        
        {a, a^2, a^3, a^2b, a^2b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2b(a^2), a^2b(a^4)}
        
        {a, a^2, a^3, a^2b, a^2b(a^2), a^2(b^2)(a^3)}
      - {a, a^2, a^3, a^2b, a^2(b^2)a} (9 descendants)
        
        {a, a^2, a^3, a^2b, ab(a^3), a^2(b^2)a}
        
        {a, a^2, a^3, a^6, a^2b, a^2(b^2)a}
        
        {a, a^2, a^3, a^2b, a^2(b^2)a, a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, a^3, a^2b, a^2(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, a^2b, a^2(b^2)a}
        
        {a, a^2, a^3, a^2b, a^2(b^2)a, a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2b(a^4), a^2(b^2)a}
        
        {a, a^2, a^3, a^2b, a^2(b^2)a, a^2(b^2)(a^3)}
      - {a, a^2, a^3, a^2b, ab(a^3)} (8 descendants)
        
        {a, a^2, a^3, a^6, a^2b, ab(a^3)}
        
        {a, a^2, a^3, a^2b, ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^2b, ab(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, a^2b, ab(a^3)}
        
        {a, a^2, a^3, a^2b, ab(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, ab(a^3), a^2b(a^4)}
        
        {a, a^2, a^3, a^2b, ab(a^3), a^2(b^2)(a^3)}
      - {a, a^2, a^3, a^6, a^2b} (7 descendants)
        
        {a, a^2, a^3, a^6, a^2b, a^3b(a^2)}
        
        {a, a^2, a^3, a^6, a^2b, a^2b(a^3)}
        
        {a, a^2, a^3, a^6, a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, a^7, a^2b}
        
        {a, a^2, a^3, a^6, a^2b, a^3b(a^3)}
        
        {a, a^2, a^3, a^6, a^2b, a^2b(a^4)}
        
        {a, a^2, a^3, a^6, a^2b, a^2(b^2)(a^3)}
      - {a, a^2, a^3, a^2b, a^3b(a^2)} (6 descendants)
        
        {a, a^2, a^3, a^2b, a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, a^2(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^7, a^2b, a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, a^3b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2b(a^4), a^3b(a^2)}
        
        {a, a^2, a^3, a^2b, a^2(b^2)(a^3), a^3b(a^2)}
      - {a, a^2, a^3, a^2b, a^2b(a^3)} (5 descendants)
        
        {a, a^2, a^3, a^2b, a^2b(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, a^2b, a^2b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2b(a^3), a^2b(a^4)}
        
        {a, a^2, a^3, a^2b, a^2b(a^3), a^2(b^2)(a^3)}
      - {a, a^2, a^3, a^2b, a^2(b^2)(a^2)} (4 descendants)
        
        {a, a^2, a^3, a^7, a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^2b, a^2(b^2)(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2b(a^4), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^2b, a^2(b^2)(a^2), a^2(b^2)(a^3)}
      - {a, a^2, a^3, a^7, a^2b} (3 descendants)
        
        {a, a^2, a^3, a^7, a^2b, a^3b(a^3)}
        
        {a, a^2, a^3, a^7, a^2b, a^2b(a^4)}
        
        {a, a^2, a^3, a^7, a^2b, a^2(b^2)(a^3)}
      - {a, a^2, a^3, a^2b, a^3b(a^3)} (2 descendants)
        
        {a, a^2, a^3, a^2b, a^2b(a^4), a^3b(a^3)}
        
        {a, a^2, a^3, a^2b, a^2(b^2)(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^2b, a^2b(a^4)} (1 descendant)
        
        {a, a^2, a^3, a^2b, a^2b(a^4), a^2(b^2)(a^3)}
      - {a, a^2, a^3, a^2b, a^2(b^2)(a^3)} (0 descendants)
    - {a, a^2, a^3, aba} (16 descendants)
      - {a, a^2, a^3, b(a^2), aba} (20 descendants)
        
        {a, a^2, a^3, a^4, b(a^2), aba}
        
        {a, a^2, a^3, b(a^2), a^3b, aba}
        
        {a, a^2, a^3, b(a^2), aba, a^2ba}
        
        {a, a^2, a^3, b(a^2), aba, ab(a^2)}
        
        {a, a^2, a^3, b(a^2), b(a^3), aba}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), aba}
        
        {a, a^2, a^3, a^5, b(a^2), aba}
        
        {a, a^2, a^3, b(a^2), aba, a^3ba}
        
        {a, a^2, a^3, b(a^2), aba, a^2b(a^2)}
        
        {a, a^2, a^3, b(a^2), aba, ab(a^3)}
        
        {a, a^2, a^3, b(a^2), aba, ababa}
        
        {a, a^2, a^3, b(a^2), aba, a(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, b(a^2), aba}
        
        {a, a^2, a^3, b(a^2), aba, a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), aba, a^2b(a^3)}
        
        {a, a^2, a^3, b(a^2), aba, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), aba}
        
        {a, a^2, a^3, b(a^2), aba, a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), aba, a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), aba, a^3(b^2)(a^2)}
      - {a, a^2, a^3, a^4, aba} (25 descendants)
        
        {a, a^2, a^3, a^4, a^3b, aba}
        
        {a, a^2, a^3, a^4, aba, a^2ba}
        
        {a, a^2, a^3, a^4, aba, ab(a^2)}
        
        {a, a^2, a^3, a^4, b(a^3), aba}
        
        {a, a^2, a^3, a^4, a^5, aba}
        
        {a, a^2, a^3, a^4, a^4b, aba}
        
        {a, a^2, a^3, a^4, aba, a^3ba}
        
        {a, a^2, a^3, a^4, aba, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, aba, ab(a^3)}
        
        {a, a^2, a^3, a^4, aba, ababa}
        
        {a, a^2, a^3, a^4, b(a^4), aba}
        
        {a, a^2, a^3, a^4, a^6, aba}
        
        {a, a^2, a^3, a^4, aba, a^4ba}
        
        {a, a^2, a^3, a^4, aba, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, aba, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, aba, ab(a^4)}
        
        {a, a^2, a^3, a^4, a^7, aba}
        
        {a, a^2, a^3, a^4, aba, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, aba, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, aba, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, aba}
        
        {a, a^2, a^3, a^4, aba, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, aba, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, aba}
        
        {a, a^2, a^3, a^4, aba, a^4b(a^4)}
      - {a, a^2, a^3, a^3b, aba} (18 descendants)
        
        {a, a^2, a^3, a^3b, aba, a^2ba}
        
        {a, a^2, a^3, a^3b, aba, ab(a^2)}
        
        {a, a^2, a^3, b(a^3), a^3b, aba}
        
        {a, a^2, a^3, a^5, a^3b, aba}
        
        {a, a^2, a^3, a^3b, aba, a^3ba}
        
        {a, a^2, a^3, a^3b, a^3(b^2), aba}
        
        {a, a^2, a^3, a^3b, aba, a^2b(a^2)}
        
        {a, a^2, a^3, a^3b, aba, ab(a^3)}
        
        {a, a^2, a^3, a^3b, aba, ababa}
        
        {a, a^2, a^3, a^6, a^3b, aba}
        
        {a, a^2, a^3, a^3b, aba, a^3b(a^2)}
        
        {a, a^2, a^3, a^3b, aba, a^3(b^2)a}
        
        {a, a^2, a^3, a^3b, aba, a^2b(a^3)}
        
        {a, a^2, a^3, a^7, a^3b, aba}
        
        {a, a^2, a^3, a^3b, aba, a^3b(a^3)}
        
        {a, a^2, a^3, a^3b, aba, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, aba, a^3b(a^4)}
        
        {a, a^2, a^3, a^3b, aba, a^3(b^2)(a^3)}
      - {a, a^2, a^3, aba, a^2ba} (13 descendants)
        
        {a, a^2, a^3, aba, ab(a^2), a^2ba}
        
        {a, a^2, a^3, b(a^3), aba, a^2ba}
        
        {a, a^2, a^3, a^5, aba, a^2ba}
        
        {a, a^2, a^3, aba, a^2ba, a^3ba}
        
        {a, a^2, a^3, aba, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, aba, ab(a^3), a^2ba}
        
        {a, a^2, a^3, aba, a^2ba, ababa}
        
        {a, a^2, a^3, a^6, aba, a^2ba}
        
        {a, a^2, a^3, aba, a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, aba, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, aba, a^2ba, a^2baba}
        
        {a, a^2, a^3, a^7, aba, a^2ba}
        
        {a, a^2, a^3, aba, a^2ba, a^3b(a^3)}
      - {a, a^2, a^3, aba, ab(a^2)} (12 descendants)
        
        {a, a^2, a^3, b(a^3), aba, ab(a^2)}
        
        {a, a^2, a^3, a^5, aba, ab(a^2)}
        
        {a, a^2, a^3, aba, ab(a^2), a^3ba}
        
        {a, a^2, a^3, aba, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, aba, ab(a^2), ab(a^3)}
        
        {a, a^2, a^3, aba, ab(a^2), ababa}
        
        {a, a^2, a^3, a^6, aba, ab(a^2)}
        
        {a, a^2, a^3, aba, ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, aba, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, aba, ab(a^2), abab(a^2)}
        
        {a, a^2, a^3, a^7, aba, ab(a^2)}
        
        {a, a^2, a^3, aba, ab(a^2), a^3b(a^3)}
      - {a, a^2, a^3, b(a^3), aba} (15 descendants)
        
        {a, a^2, a^3, a^5, b(a^3), aba}
        
        {a, a^2, a^3, b(a^3), aba, a^3ba}
        
        {a, a^2, a^3, b(a^3), aba, a^2b(a^2)}
        
        {a, a^2, a^3, b(a^3), aba, ab(a^3)}
        
        {a, a^2, a^3, b(a^3), aba, ababa}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), aba}
        
        {a, a^2, a^3, a^6, b(a^3), aba}
        
        {a, a^2, a^3, b(a^3), aba, a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), aba, a^2b(a^3)}
        
        {a, a^2, a^3, b(a^3), aba, a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, b(a^3), aba}
        
        {a, a^2, a^3, b(a^3), aba, a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), aba, a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), aba, a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), aba, a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^5, aba} (12 descendants)
        
        {a, a^2, a^3, a^5, aba, a^3ba}
        
        {a, a^2, a^3, a^5, aba, a^2b(a^2)}
        
        {a, a^2, a^3, a^5, aba, ab(a^3)}
        
        {a, a^2, a^3, a^5, aba, ababa}
        
        {a, a^2, a^3, a^5, a^6, aba}
        
        {a, a^2, a^3, a^5, aba, a^3b(a^2)}
        
        {a, a^2, a^3, a^5, aba, a^2b(a^3)}
        
        {a, a^2, a^3, a^5, a^7, aba}
        
        {a, a^2, a^3, a^5, aba, a^5ba}
        
        {a, a^2, a^3, a^5, aba, a^3b(a^3)}
        
        {a, a^2, a^3, a^5, aba, ab(a^5)}
        
        {a, a^2, a^3, a^5, a^9, aba}
      - {a, a^2, a^3, aba, a^3ba} (9 descendants)
        
        {a, a^2, a^3, aba, a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, aba, ab(a^3), a^3ba}
        
        {a, a^2, a^3, aba, a^3ba, ababa}
        
        {a, a^2, a^3, a^6, aba, a^3ba}
        
        {a, a^2, a^3, aba, a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, aba, a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^7, aba, a^3ba}
        
        {a, a^2, a^3, aba, a^3ba, a^3b(a^3)}
        
        {a, a^2, a^3, aba, a^3ba, a^3baba}
      - {a, a^2, a^3, aba, a^2b(a^2)} (7 descendants)
        
        {a, a^2, a^3, aba, ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, aba, a^2b(a^2), ababa}
        
        {a, a^2, a^3, a^6, aba, a^2b(a^2)}
        
        {a, a^2, a^3, aba, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, aba, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, aba, a^2b(a^2)}
        
        {a, a^2, a^3, aba, a^2b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, aba, ab(a^3)} (7 descendants)
        
        {a, a^2, a^3, aba, ab(a^3), ababa}
        
        {a, a^2, a^3, a^6, aba, ab(a^3)}
        
        {a, a^2, a^3, aba, ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, aba, ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, aba, ab(a^3)}
        
        {a, a^2, a^3, aba, ab(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, aba, ab(a^3), abab(a^3)}
      - {a, a^2, a^3, aba, ababa} (6 descendants)
        
        {a, a^2, a^3, a^6, aba, ababa}
        
        {a, a^2, a^3, aba, a^3b(a^2), ababa}
        
        {a, a^2, a^3, aba, a^2b(a^3), ababa}
        
        {a, a^2, a^3, a^7, aba, ababa}
        
        {a, a^2, a^3, aba, a^3b(a^3), ababa}
        
        {a, a^2, a^3, aba, ababa, abababa}
      - {a, a^2, a^3, a^6, aba} (4 descendants)
        
        {a, a^2, a^3, a^6, aba, a^3b(a^2)}
        
        {a, a^2, a^3, a^6, aba, a^2b(a^3)}
        
        {a, a^2, a^3, a^6, a^7, aba}
        
        {a, a^2, a^3, a^6, aba, a^3b(a^3)}
      - {a, a^2, a^3, aba, a^3b(a^2)} (3 descendants)
        
        {a, a^2, a^3, aba, a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^7, aba, a^3b(a^2)}
        
        {a, a^2, a^3, aba, a^3b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, aba, a^2b(a^3)} (2 descendants)
        
        {a, a^2, a^3, a^7, aba, a^2b(a^3)}
        
        {a, a^2, a^3, aba, a^2b(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^7, aba} (1 descendant)
        
        {a, a^2, a^3, a^7, aba, a^3b(a^3)}
      - {a, a^2, a^3, aba, a^3b(a^3)} (0 descendants)
    - {a, a^2, a^3, b(a^2)} (19 descendants)
      - {a, a^2, a^3, a^4, b(a^2)} (30 descendants)
        
        {a, a^2, a^3, a^4, b(a^2), a^3b}
        
        {a, a^2, a^3, a^4, b(a^2), a^2ba}
        
        {a, a^2, a^3, a^4, b(a^2), ab(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^2), b^2(a^2)}
        
        {a, a^2, a^3, a^4, a^5, b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), a^4b}
        
        {a, a^2, a^3, a^4, b(a^2), a^3ba}
        
        {a, a^2, a^3, a^4, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), ab(a^3)}
        
        {a, a^2, a^3, a^4, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), b(a^4)}
        
        {a, a^2, a^3, a^4, a^6, b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), a^4ba}
        
        {a, a^2, a^3, a^4, b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), ab(a^4)}
        
        {a, a^2, a^3, a^4, a^7, b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), a^5b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^2), a^4(b^2)(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^2), a^4b(a^4)}
      - {a, a^2, a^3, b(a^2), a^3b} (23 descendants)
        
        {a, a^2, a^3, b(a^2), a^3b, a^2ba}
        
        {a, a^2, a^3, b(a^2), a^3b, ab(a^2)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^3b}
        
        {a, a^2, a^3, b(a^2), a^3b, b^2(a^2)}
        
        {a, a^2, a^3, a^5, b(a^2), a^3b}
        
        {a, a^2, a^3, b(a^2), a^3b, a^3ba}
        
        {a, a^2, a^3, b(a^2), a^3b, a^3(b^2)}
        
        {a, a^2, a^3, b(a^2), a^3b, a^2b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^3b, ab(a^3)}
        
        {a, a^2, a^3, b(a^2), a^3b, a(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, b(a^2), a^3b}
        
        {a, a^2, a^3, b(a^2), a^3b, a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^3b, a^3(b^2)a}
        
        {a, a^2, a^3, b(a^2), a^3b, a^2b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^3b, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), a^3b}
        
        {a, a^2, a^3, b(a^2), a^3b, a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^3b, a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^3b, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), a^3b, a^3b(a^4)}
        
        {a, a^2, a^3, b(a^2), a^3b, a^3bab(a^2)}
        
        {a, a^2, a^3, b(a^2), a^3b, a^3(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^2), a^3b, a^3(b^3)(a^2)}
      - {a, a^2, a^3, b(a^2), a^2ba} (16 descendants)
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^2ba}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^2ba}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^2ba}
        
        {a, a^2, a^3, a^5, b(a^2), a^2ba}
        
        {a, a^2, a^3, b(a^2), a^2ba, a^3ba}
        
        {a, a^2, a^3, b(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^3), a^2ba}
        
        {a, a^2, a^3, b(a^2), a(b^2)(a^2), a^2ba}
        
        {a, a^2, a^3, a^6, b(a^2), a^2ba}
        
        {a, a^2, a^3, b(a^2), a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), a^2ba}
        
        {a, a^2, a^3, b(a^2), a^2ba, a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2ba, a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^2ba, a^3(b^2)(a^2)}
      - {a, a^2, a^3, b(a^2), ab(a^2)} (20 descendants)
        
        {a, a^2, a^3, b(a^2), b(a^3), ab(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), ab(a^2)}
        
        {a, a^2, a^3, a^5, b(a^2), ab(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^3ba}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), ab(a^3)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), bab(a^2)}
        
        {a, a^2, a^3, a^6, b(a^2), ab(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), abab(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), ab(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^2bab(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^5b(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^2), a^3bab(a^2)}
      - {a, a^2, a^3, b(a^2), b(a^3)} (19 descendants)
        
        {a, a^2, a^3, b(a^2), b(a^3), b^2(a^2)}
        
        {a, a^2, a^3, a^5, b(a^2), b(a^3)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^3ba}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, b(a^2), b(a^3), ab(a^3)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), b(a^3), b^2(a^3)}
        
        {a, a^2, a^3, a^6, b(a^2), b(a^3)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, b(a^2), b(a^3)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, b(a^2), b(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, b(a^2), b^2(a^2)} (18 descendants)
        
        {a, a^2, a^3, a^5, b(a^2), b^2(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^3ba}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), ab(a^3)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), b^3(a^2)}
        
        {a, a^2, a^3, a^6, b(a^2), b^2(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a(b^3)(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), b^2(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^2(b^3)(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^4(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), b^2(a^2), a^3(b^3)(a^2)}
      - {a, a^2, a^3, a^5, b(a^2)} (13 descendants)
        
        {a, a^2, a^3, a^5, b(a^2), a^3ba}
        
        {a, a^2, a^3, a^5, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, a^5, b(a^2), ab(a^3)}
        
        {a, a^2, a^3, a^5, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^3, a^5, a^6, b(a^2)}
        
        {a, a^2, a^3, a^5, b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^5, b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^5, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^5, a^7, b(a^2)}
        
        {a, a^2, a^3, a^5, b(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, a^5, b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^5, b(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^5, a^9, b(a^2)}
      - {a, a^2, a^3, b(a^2), a^3ba} (11 descendants)
        
        {a, a^2, a^3, b(a^2), a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, b(a^2), ab(a^3), a^3ba}
        
        {a, a^2, a^3, b(a^2), a(b^2)(a^2), a^3ba}
        
        {a, a^2, a^3, a^6, b(a^2), a^3ba}
        
        {a, a^2, a^3, b(a^2), a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, b(a^2), a^2(b^2)(a^2), a^3ba}
        
        {a, a^2, a^3, a^7, b(a^2), a^3ba}
        
        {a, a^2, a^3, b(a^2), a^3ba, a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^3ba, a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^3ba, a^3(b^2)(a^2)}
      - {a, a^2, a^3, b(a^2), a^2b(a^2)} (10 descendants)
        
        {a, a^2, a^3, b(a^2), ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, b(a^2), a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, a^6, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2b(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^2b(a^2), a^3(b^2)(a^2)}
      - {a, a^2, a^3, b(a^2), ab(a^3)} (9 descendants)
        
        {a, a^2, a^3, b(a^2), ab(a^3), a(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, b(a^2), ab(a^3)}
        
        {a, a^2, a^3, b(a^2), ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^2), ab(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), ab(a^3)}
        
        {a, a^2, a^3, b(a^2), ab(a^3), a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), ab(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), ab(a^3), a^3(b^2)(a^2)}
      - {a, a^2, a^3, b(a^2), a(b^2)(a^2)} (8 descendants)
        
        {a, a^2, a^3, a^6, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), a(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), a(b^2)(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^2), a(b^2)(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), a(b^2)(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), a(b^2)(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), a(b^2)(a^2), a^3(b^2)(a^2)}
      - {a, a^2, a^3, a^6, b(a^2)} (7 descendants)
        
        {a, a^2, a^3, a^6, b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^6, b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^6, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, a^7, b(a^2)}
        
        {a, a^2, a^3, a^6, b(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, a^6, b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^6, b(a^2), a^3(b^2)(a^2)}
      - {a, a^2, a^3, b(a^2), a^3b(a^2)} (6 descendants)
        
        {a, a^2, a^3, b(a^2), a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^3b(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^3b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^3b(a^2), a^3(b^2)(a^2)}
      - {a, a^2, a^3, b(a^2), a^2b(a^3)} (5 descendants)
        
        {a, a^2, a^3, b(a^2), a^2b(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^2b(a^3), a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^2b(a^3), a^3(b^2)(a^2)}
      - {a, a^2, a^3, b(a^2), a^2(b^2)(a^2)} (4 descendants)
        
        {a, a^2, a^3, a^7, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2(b^2)(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^2(b^2)(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^2), a^2(b^2)(a^2), a^3(b^2)(a^2)}
      - {a, a^2, a^3, a^7, b(a^2)} (3 descendants)
        
        {a, a^2, a^3, a^7, b(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, a^7, b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^7, b(a^2), a^3(b^2)(a^2)}
      - {a, a^2, a^3, b(a^2), a^4b(a^2)} (2 descendants)
        
        {a, a^2, a^3, b(a^2), a^3b(a^3), a^4b(a^2)}
        
        {a, a^2, a^3, b(a^2), a^3(b^2)(a^2), a^4b(a^2)}
      - {a, a^2, a^3, b(a^2), a^3b(a^3)} (1 descendant)
        
        {a, a^2, a^3, b(a^2), a^3b(a^3), a^3(b^2)(a^2)}
      - {a, a^2, a^3, b(a^2), a^3(b^2)(a^2)} (0 descendants)
    - {a, a^2, a^3, a^4} (24 descendants)
      - {a, a^2, a^3, a^4, a^3b} (29 descendants)
        
        {a, a^2, a^3, a^4, a^3b, a^2ba}
        
        {a, a^2, a^3, a^4, a^3b, ab(a^2)}
        
        {a, a^2, a^3, a^4, b(a^3), a^3b}
        
        {a, a^2, a^3, a^4, a^5, a^3b}
        
        {a, a^2, a^3, a^4, a^3b, a^4b}
        
        {a, a^2, a^3, a^4, a^3b, a^3ba}
        
        {a, a^2, a^3, a^4, a^3b, a^3(b^2)}
        
        {a, a^2, a^3, a^4, a^3b, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, a^3b, ab(a^3)}
        
        {a, a^2, a^3, a^4, b(a^4), a^3b}
        
        {a, a^2, a^3, a^4, a^6, a^3b}
        
        {a, a^2, a^3, a^4, a^3b, a^4ba}
        
        {a, a^2, a^3, a^4, a^3b, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^3b, a^3(b^2)a}
        
        {a, a^2, a^3, a^4, a^3b, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, a^3b, ab(a^4)}
        
        {a, a^2, a^3, a^4, a^7, a^3b}
        
        {a, a^2, a^3, a^4, a^3b, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^3b, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^3b, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^4, a^3b, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, a^3b}
        
        {a, a^2, a^3, a^4, a^3b, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^3b, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^3b, a^3(b^2)(a^3)}
        
        {a, a^2, a^3, a^4, a^9, a^3b}
        
        {a, a^2, a^3, a^4, a^3b, a^4b(a^4)}
        
        {a, a^2, a^3, a^4, a^3b, a^3b(a^5)}
        
        {a, a^2, a^3, a^4, a^3b, a^3(b^2)(a^4)}
      - {a, a^2, a^3, a^4, a^2ba} (22 descendants)
        
        {a, a^2, a^3, a^4, ab(a^2), a^2ba}
        
        {a, a^2, a^3, a^4, b(a^3), a^2ba}
        
        {a, a^2, a^3, a^4, a^5, a^2ba}
        
        {a, a^2, a^3, a^4, a^4b, a^2ba}
        
        {a, a^2, a^3, a^4, a^2ba, a^3ba}
        
        {a, a^2, a^3, a^4, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^3), a^2ba}
        
        {a, a^2, a^3, a^4, b(a^4), a^2ba}
        
        {a, a^2, a^3, a^4, a^6, a^2ba}
        
        {a, a^2, a^3, a^4, a^2ba, a^4ba}
        
        {a, a^2, a^3, a^4, a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^4), a^2ba}
        
        {a, a^2, a^3, a^4, a^7, a^2ba}
        
        {a, a^2, a^3, a^4, a^2ba, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^2ba, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^2ba, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, a^2ba}
        
        {a, a^2, a^3, a^4, a^2ba, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^2ba, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, a^2ba}
        
        {a, a^2, a^3, a^4, a^2ba, a^4b(a^4)}
      - {a, a^2, a^3, a^4, ab(a^2)} (21 descendants)
        
        {a, a^2, a^3, a^4, b(a^3), ab(a^2)}
        
        {a, a^2, a^3, a^4, a^5, ab(a^2)}
        
        {a, a^2, a^3, a^4, a^4b, ab(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^2), a^3ba}
        
        {a, a^2, a^3, a^4, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^2), ab(a^3)}
        
        {a, a^2, a^3, a^4, b(a^4), ab(a^2)}
        
        {a, a^2, a^3, a^4, a^6, ab(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^2), a^4ba}
        
        {a, a^2, a^3, a^4, ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^2), ab(a^4)}
        
        {a, a^2, a^3, a^4, a^7, ab(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^2), a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, ab(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^2), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^2), a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, ab(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^2), a^4b(a^4)}
      - {a, a^2, a^3, a^4, b(a^3)} (26 descendants)
        
        {a, a^2, a^3, a^4, a^5, b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^3), a^4b}
        
        {a, a^2, a^3, a^4, b(a^3), a^3ba}
        
        {a, a^2, a^3, a^4, b(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^3), ab(a^3)}
        
        {a, a^2, a^3, a^4, b(a^3), b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^3), b^2(a^3)}
        
        {a, a^2, a^3, a^4, a^6, b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^3), a^4ba}
        
        {a, a^2, a^3, a^4, b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^3), ab(a^4)}
        
        {a, a^2, a^3, a^4, b(a^3), a(b^2)(a^3)}
        
        {a, a^2, a^3, a^4, a^7, b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^3), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^3), a^2b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, a^4, a^8, b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^3), a^3b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^3), a^3(b^2)(a^3)}
        
        {a, a^2, a^3, a^4, a^9, b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^3), a^5b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^3), a^4b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^3), a^4(b^2)(a^3)}
      - {a, a^2, a^3, a^4, a^5} (32 descendants)
        
        {a, a^2, a^3, a^4, a^5, a^4b}
        
        {a, a^2, a^3, a^4, a^5, a^3ba}
        
        {a, a^2, a^3, a^4, a^5, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, a^5, ab(a^3)}
        
        {a, a^2, a^3, a^4, a^5, b(a^4)}
        
        {a, a^2, a^3, a^4, a^5, a^6}
        
        {a, a^2, a^3, a^4, a^5, a^5b}
        
        {a, a^2, a^3, a^4, a^5, a^4ba}
        
        {a, a^2, a^3, a^4, a^5, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^5, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, a^5, ab(a^4)}
        
        {a, a^2, a^3, a^4, a^5, b(a^5)}
        
        {a, a^2, a^3, a^4, a^5, a^7}
        
        {a, a^2, a^3, a^4, a^5, a^5ba}
        
        {a, a^2, a^3, a^4, a^5, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^5, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^5, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^5, ab(a^5)}
        
        {a, a^2, a^3, a^4, a^5, a^8}
        
        {a, a^2, a^3, a^4, a^5, a^5b(a^2)}
        
        {a, a^2, a^3, a^4, a^5, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^5, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^5, a^2b(a^5)}
        
        {a, a^2, a^3, a^4, a^5, a^9}
        
        {a, a^2, a^3, a^4, a^5, a^5b(a^3)}
        
        {a, a^2, a^3, a^4, a^5, a^4b(a^4)}
        
        {a, a^2, a^3, a^4, a^5, a^3b(a^5)}
        
        {a, a^2, a^3, a^4, a^5, a^10}
        
        {a, a^2, a^3, a^4, a^5, a^5b(a^4)}
        
        {a, a^2, a^3, a^4, a^5, a^4b(a^5)}
        
        {a, a^2, a^3, a^4, a^5, a^11}
        
        {a, a^2, a^3, a^4, a^5, a^5b(a^5)}
      - {a, a^2, a^3, a^4, a^4b} (24 descendants)
        
        {a, a^2, a^3, a^4, a^4b, a^3ba}
        
        {a, a^2, a^3, a^4, a^4b, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, a^4b, ab(a^3)}
        
        {a, a^2, a^3, a^4, b(a^4), a^4b}
        
        {a, a^2, a^3, a^4, a^6, a^4b}
        
        {a, a^2, a^3, a^4, a^4b, a^4ba}
        
        {a, a^2, a^3, a^4, a^4b, a^4(b^2)}
        
        {a, a^2, a^3, a^4, a^4b, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^4b, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, a^4b, ab(a^4)}
        
        {a, a^2, a^3, a^4, a^7, a^4b}
        
        {a, a^2, a^3, a^4, a^4b, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^4b, a^4(b^2)a}
        
        {a, a^2, a^3, a^4, a^4b, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^4b, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, a^4b}
        
        {a, a^2, a^3, a^4, a^4b, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^4b, a^4(b^2)(a^2)}
        
        {a, a^2, a^3, a^4, a^4b, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, a^4b}
        
        {a, a^2, a^3, a^4, a^4b, a^4b(a^4)}
        
        {a, a^2, a^3, a^4, a^4b, a^4(b^2)(a^3)}
        
        {a, a^2, a^3, a^4, a^4b, a^4b(a^5)}
        
        {a, a^2, a^3, a^4, a^4b, a^4(b^2)(a^4)}
      - {a, a^2, a^3, a^4, a^3ba} (17 descendants)
        
        {a, a^2, a^3, a^4, a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, a^4, ab(a^3), a^3ba}
        
        {a, a^2, a^3, a^4, b(a^4), a^3ba}
        
        {a, a^2, a^3, a^4, a^6, a^3ba}
        
        {a, a^2, a^3, a^4, a^3ba, a^4ba}
        
        {a, a^2, a^3, a^4, a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^4, ab(a^4), a^3ba}
        
        {a, a^2, a^3, a^4, a^7, a^3ba}
        
        {a, a^2, a^3, a^4, a^3ba, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^3ba, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b(a^4), a^3ba}
        
        {a, a^2, a^3, a^4, a^8, a^3ba}
        
        {a, a^2, a^3, a^4, a^3ba, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^3ba, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, a^3ba}
        
        {a, a^2, a^3, a^4, a^3ba, a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^2b(a^2)} (16 descendants)
        
        {a, a^2, a^3, a^4, ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^4), a^2b(a^2)}
        
        {a, a^2, a^3, a^4, a^6, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b(a^2), a^4ba}
        
        {a, a^2, a^3, a^4, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^4), a^2b(a^2)}
        
        {a, a^2, a^3, a^4, a^7, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b(a^2), a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b(a^2), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b(a^2), a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, a^2b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b(a^2), a^4b(a^4)}
      - {a, a^2, a^3, a^4, ab(a^3)} (15 descendants)
        
        {a, a^2, a^3, a^4, b(a^4), ab(a^3)}
        
        {a, a^2, a^3, a^4, a^6, ab(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^3), a^4ba}
        
        {a, a^2, a^3, a^4, ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^3), ab(a^4)}
        
        {a, a^2, a^3, a^4, a^7, ab(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^3), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^3), a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, ab(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^3), a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, ab(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^3), a^4b(a^4)}
      - {a, a^2, a^3, a^4, b(a^4)} (20 descendants)
        
        {a, a^2, a^3, a^4, a^6, b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^4), a^4ba}
        
        {a, a^2, a^3, a^4, b(a^4), a^3b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^4), a^2b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^4), ab(a^4)}
        
        {a, a^2, a^3, a^4, b(a^4), b^2(a^4)}
        
        {a, a^2, a^3, a^4, a^7, b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^4), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, b(a^4), a^3b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^4), a^2b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^4), a(b^2)(a^4)}
        
        {a, a^2, a^3, a^4, a^8, b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^4), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, b(a^4), a^3b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^4), a^2(b^2)(a^4)}
        
        {a, a^2, a^3, a^4, a^9, b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^4), a^4b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^4), a^3(b^2)(a^4)}
        
        {a, a^2, a^3, a^4, b(a^4), a^5b(a^4)}
        
        {a, a^2, a^3, a^4, b(a^4), a^4(b^2)(a^4)}
      - {a, a^2, a^3, a^4, a^6} (14 descendants)
        
        {a, a^2, a^3, a^4, a^6, a^4ba}
        
        {a, a^2, a^3, a^4, a^6, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^6, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, a^6, ab(a^4)}
        
        {a, a^2, a^3, a^4, a^6, a^7}
        
        {a, a^2, a^3, a^4, a^6, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^6, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^6, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^6, a^8}
        
        {a, a^2, a^3, a^4, a^6, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^6, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^6, a^9}
        
        {a, a^2, a^3, a^4, a^6, a^4b(a^4)}
        
        {a, a^2, a^3, a^4, a^6, a^11}
      - {a, a^2, a^3, a^4, a^4ba} (12 descendants)
        
        {a, a^2, a^3, a^4, a^3b(a^2), a^4ba}
        
        {a, a^2, a^3, a^4, a^2b(a^3), a^4ba}
        
        {a, a^2, a^3, a^4, ab(a^4), a^4ba}
        
        {a, a^2, a^3, a^4, a^7, a^4ba}
        
        {a, a^2, a^3, a^4, a^4ba, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^3b(a^3), a^4ba}
        
        {a, a^2, a^3, a^4, a^2b(a^4), a^4ba}
        
        {a, a^2, a^3, a^4, a^8, a^4ba}
        
        {a, a^2, a^3, a^4, a^4ba, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^3b(a^4), a^4ba}
        
        {a, a^2, a^3, a^4, a^9, a^4ba}
        
        {a, a^2, a^3, a^4, a^4ba, a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^3b(a^2)} (11 descendants)
        
        {a, a^2, a^3, a^4, a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^4), a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^7, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^3b(a^2), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^3b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b(a^4), a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^8, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^3b(a^2), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^3b(a^2), a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, a^3b(a^2)}
        
        {a, a^2, a^3, a^4, a^3b(a^2), a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^2b(a^3)} (10 descendants)
        
        {a, a^2, a^3, a^4, ab(a^4), a^2b(a^3)}
        
        {a, a^2, a^3, a^4, a^7, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b(a^3), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b(a^3), a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b(a^3), a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, a^2b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b(a^3), a^4b(a^4)}
      - {a, a^2, a^3, a^4, ab(a^4)} (9 descendants)
        
        {a, a^2, a^3, a^4, a^7, ab(a^4)}
        
        {a, a^2, a^3, a^4, ab(a^4), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, ab(a^4), a^3b(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^4), a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, ab(a^4)}
        
        {a, a^2, a^3, a^4, ab(a^4), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, ab(a^4), a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, ab(a^4)}
        
        {a, a^2, a^3, a^4, ab(a^4), a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^7} (8 descendants)
        
        {a, a^2, a^3, a^4, a^7, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^7, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^7, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^7, a^8}
        
        {a, a^2, a^3, a^4, a^7, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^7, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^7, a^9}
        
        {a, a^2, a^3, a^4, a^7, a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^4b(a^2)} (7 descendants)
        
        {a, a^2, a^3, a^4, a^3b(a^3), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^2b(a^4), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^8, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^4b(a^2), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^3b(a^4), a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^9, a^4b(a^2)}
        
        {a, a^2, a^3, a^4, a^4b(a^2), a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^3b(a^3)} (6 descendants)
        
        {a, a^2, a^3, a^4, a^2b(a^4), a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^8, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^3b(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^3b(a^3), a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, a^3b(a^3)}
        
        {a, a^2, a^3, a^4, a^3b(a^3), a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^2b(a^4)} (5 descendants)
        
        {a, a^2, a^3, a^4, a^8, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^2b(a^4), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^2b(a^4), a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^9, a^2b(a^4)}
        
        {a, a^2, a^3, a^4, a^2b(a^4), a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^8} (4 descendants)
        
        {a, a^2, a^3, a^4, a^8, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^8, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^8, a^9}
        
        {a, a^2, a^3, a^4, a^8, a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^4b(a^3)} (3 descendants)
        
        {a, a^2, a^3, a^4, a^3b(a^4), a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^9, a^4b(a^3)}
        
        {a, a^2, a^3, a^4, a^4b(a^3), a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^3b(a^4)} (2 descendants)
        
        {a, a^2, a^3, a^4, a^9, a^3b(a^4)}
        
        {a, a^2, a^3, a^4, a^3b(a^4), a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^9} (1 descendant)
        
        {a, a^2, a^3, a^4, a^9, a^4b(a^4)}
      - {a, a^2, a^3, a^4, a^4b(a^4)} (0 descendants)
    - {a, a^2, a^3, a^3b} (17 descendants)
      - {a, a^2, a^3, a^3b, a^2ba} (16 descendants)
        
        {a, a^2, a^3, a^3b, ab(a^2), a^2ba}
        
        {a, a^2, a^3, b(a^3), a^3b, a^2ba}
        
        {a, a^2, a^3, a^5, a^3b, a^2ba}
        
        {a, a^2, a^3, a^3b, a^2ba, a^3ba}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^2ba}
        
        {a, a^2, a^3, a^3b, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, a^3b, ab(a^3), a^2ba}
        
        {a, a^2, a^3, a^6, a^3b, a^2ba}
        
        {a, a^2, a^3, a^3b, a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^3b, a^2ba, a^3(b^2)a}
        
        {a, a^2, a^3, a^3b, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^7, a^3b, a^2ba}
        
        {a, a^2, a^3, a^3b, a^2ba, a^3b(a^3)}
        
        {a, a^2, a^3, a^3b, a^2ba, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, a^2ba, a^3b(a^4)}
        
        {a, a^2, a^3, a^3b, a^2ba, a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^3b, ab(a^2)} (15 descendants)
        
        {a, a^2, a^3, b(a^3), a^3b, ab(a^2)}
        
        {a, a^2, a^3, a^5, a^3b, ab(a^2)}
        
        {a, a^2, a^3, a^3b, ab(a^2), a^3ba}
        
        {a, a^2, a^3, a^3b, a^3(b^2), ab(a^2)}
        
        {a, a^2, a^3, a^3b, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, a^3b, ab(a^2), ab(a^3)}
        
        {a, a^2, a^3, a^6, a^3b, ab(a^2)}
        
        {a, a^2, a^3, a^3b, ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^3b, ab(a^2), a^3(b^2)a}
        
        {a, a^2, a^3, a^3b, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, a^3b, ab(a^2)}
        
        {a, a^2, a^3, a^3b, ab(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^3b, ab(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, ab(a^2), a^3b(a^4)}
        
        {a, a^2, a^3, a^3b, ab(a^2), a^3(b^2)(a^3)}
      - {a, a^2, a^3, b(a^3), a^3b} (20 descendants)
        
        {a, a^2, a^3, a^5, b(a^3), a^3b}
        
        {a, a^2, a^3, b(a^3), a^3b, a^3ba}
        
        {a, a^2, a^3, b(a^3), a^3b, a^3(b^2)}
        
        {a, a^2, a^3, b(a^3), a^3b, a^2b(a^2)}
        
        {a, a^2, a^3, b(a^3), a^3b, ab(a^3)}
        
        {a, a^2, a^3, b(a^3), a^3b, b^2(a^3)}
        
        {a, a^2, a^3, a^6, b(a^3), a^3b}
        
        {a, a^2, a^3, b(a^3), a^3b, a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), a^3b, a^3(b^2)a}
        
        {a, a^2, a^3, b(a^3), a^3b, a^2b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^3b, a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, b(a^3), a^3b}
        
        {a, a^2, a^3, b(a^3), a^3b, a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^3b, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, b(a^3), a^3b, a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), a^3b, a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^3b, a^3b(a^4)}
        
        {a, a^2, a^3, b(a^3), a^3b, a^3(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), a^3b, a^3bab(a^3)}
        
        {a, a^2, a^3, b(a^3), a^3b, a^3(b^3)(a^3)}
      - {a, a^2, a^3, a^5, a^3b} (14 descendants)
        
        {a, a^2, a^3, a^5, a^3b, a^3ba}
        
        {a, a^2, a^3, a^5, a^3b, a^3(b^2)}
        
        {a, a^2, a^3, a^5, a^3b, a^2b(a^2)}
        
        {a, a^2, a^3, a^5, a^3b, ab(a^3)}
        
        {a, a^2, a^3, a^5, a^6, a^3b}
        
        {a, a^2, a^3, a^5, a^3b, a^3b(a^2)}
        
        {a, a^2, a^3, a^5, a^3b, a^3(b^2)a}
        
        {a, a^2, a^3, a^5, a^3b, a^2b(a^3)}
        
        {a, a^2, a^3, a^5, a^7, a^3b}
        
        {a, a^2, a^3, a^5, a^3b, a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^3b, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^5, a^3b, a^3b(a^4)}
        
        {a, a^2, a^3, a^5, a^3b, a^3(b^2)(a^3)}
        
        {a, a^2, a^3, a^5, a^9, a^3b}
      - {a, a^2, a^3, a^3b, a^3ba} (17 descendants)
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3ba}
        
        {a, a^2, a^3, a^3b, a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, a^3b, ab(a^3), a^3ba}
        
        {a, a^2, a^3, a^6, a^3b, a^3ba}
        
        {a, a^2, a^3, a^3b, a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^3b, a^3ba, a^3bab}
        
        {a, a^2, a^3, a^3b, a^3ba, a^3(b^2)a}
        
        {a, a^2, a^3, a^3b, a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^7, a^3b, a^3ba}
        
        {a, a^2, a^3, a^3b, a^3ba, a^3b(a^3)}
        
        {a, a^2, a^3, a^3b, a^3ba, a^3baba}
        
        {a, a^2, a^3, a^3b, a^3ba, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, a^3ba, a^3b(a^4)}
        
        {a, a^2, a^3, a^3b, a^3ba, a^3bab(a^2)}
        
        {a, a^2, a^3, a^3b, a^3ba, a^3(b^2)(a^3)}
        
        {a, a^2, a^3, a^3b, a^3ba, a^3b(a^5)}
        
        {a, a^2, a^3, a^3b, a^3ba, a^3bab(a^3)}
      - {a, a^2, a^3, a^3b, a^3(b^2)} (16 descendants)
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^2b(a^2)}
        
        {a, a^2, a^3, a^3b, a^3(b^2), ab(a^3)}
        
        {a, a^2, a^3, a^6, a^3b, a^3(b^2)}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3(b^2)a}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3(b^3)}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, a^3b, a^3(b^2)}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3(b^3)a}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3b(a^4)}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3(b^2)(a^3)}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3(b^3)(a^2)}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3(b^2)(a^4)}
        
        {a, a^2, a^3, a^3b, a^3(b^2), a^3(b^3)(a^3)}
      - {a, a^2, a^3, a^3b, a^2b(a^2)} (10 descendants)
        
        {a, a^2, a^3, a^3b, ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, a^6, a^3b, a^2b(a^2)}
        
        {a, a^2, a^3, a^3b, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^3b, a^2b(a^2), a^3(b^2)a}
        
        {a, a^2, a^3, a^3b, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, a^3b, a^2b(a^2)}
        
        {a, a^2, a^3, a^3b, a^2b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^3b, a^2b(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, a^2b(a^2), a^3b(a^4)}
        
        {a, a^2, a^3, a^3b, a^2b(a^2), a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^3b, ab(a^3)} (9 descendants)
        
        {a, a^2, a^3, a^6, a^3b, ab(a^3)}
        
        {a, a^2, a^3, a^3b, ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^3b, ab(a^3), a^3(b^2)a}
        
        {a, a^2, a^3, a^3b, ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, a^3b, ab(a^3)}
        
        {a, a^2, a^3, a^3b, ab(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^3b, ab(a^3), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, ab(a^3), a^3b(a^4)}
        
        {a, a^2, a^3, a^3b, ab(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^6, a^3b} (8 descendants)
        
        {a, a^2, a^3, a^6, a^3b, a^3b(a^2)}
        
        {a, a^2, a^3, a^6, a^3b, a^3(b^2)a}
        
        {a, a^2, a^3, a^6, a^3b, a^2b(a^3)}
        
        {a, a^2, a^3, a^6, a^7, a^3b}
        
        {a, a^2, a^3, a^6, a^3b, a^3b(a^3)}
        
        {a, a^2, a^3, a^6, a^3b, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^6, a^3b, a^3b(a^4)}
        
        {a, a^2, a^3, a^6, a^3b, a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^3b, a^3b(a^2)} (7 descendants)
        
        {a, a^2, a^3, a^3b, a^3b(a^2), a^3(b^2)a}
        
        {a, a^2, a^3, a^3b, a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^7, a^3b, a^3b(a^2)}
        
        {a, a^2, a^3, a^3b, a^3b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^3b, a^3b(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, a^3b(a^2), a^3b(a^4)}
        
        {a, a^2, a^3, a^3b, a^3b(a^2), a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^3b, a^3(b^2)a} (6 descendants)
        
        {a, a^2, a^3, a^3b, a^2b(a^3), a^3(b^2)a}
        
        {a, a^2, a^3, a^7, a^3b, a^3(b^2)a}
        
        {a, a^2, a^3, a^3b, a^3b(a^3), a^3(b^2)a}
        
        {a, a^2, a^3, a^3b, a^3(b^2)a, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, a^3b(a^4), a^3(b^2)a}
        
        {a, a^2, a^3, a^3b, a^3(b^2)a, a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^3b, a^2b(a^3)} (5 descendants)
        
        {a, a^2, a^3, a^7, a^3b, a^2b(a^3)}
        
        {a, a^2, a^3, a^3b, a^2b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^3b, a^2b(a^3), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, a^2b(a^3), a^3b(a^4)}
        
        {a, a^2, a^3, a^3b, a^2b(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^7, a^3b} (4 descendants)
        
        {a, a^2, a^3, a^7, a^3b, a^3b(a^3)}
        
        {a, a^2, a^3, a^7, a^3b, a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^7, a^3b, a^3b(a^4)}
        
        {a, a^2, a^3, a^7, a^3b, a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^3b, a^3b(a^3)} (3 descendants)
        
        {a, a^2, a^3, a^3b, a^3b(a^3), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, a^3b(a^3), a^3b(a^4)}
        
        {a, a^2, a^3, a^3b, a^3b(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^3b, a^3(b^2)(a^2)} (2 descendants)
        
        {a, a^2, a^3, a^3b, a^3b(a^4), a^3(b^2)(a^2)}
        
        {a, a^2, a^3, a^3b, a^3(b^2)(a^2), a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^3b, a^3b(a^4)} (1 descendant)
        
        {a, a^2, a^3, a^3b, a^3b(a^4), a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^3b, a^3(b^2)(a^3)} (0 descendants)
    - {a, a^2, a^3, a^2ba} (11 descendants)
      - {a, a^2, a^3, ab(a^2), a^2ba} (11 descendants)
        
        {a, a^2, a^3, b(a^3), ab(a^2), a^2ba}
        
        {a, a^2, a^3, a^5, ab(a^2), a^2ba}
        
        {a, a^2, a^3, ab(a^2), a^2ba, a^3ba}
        
        {a, a^2, a^3, ab(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, ab(a^2), ab(a^3), a^2ba}
        
        {a, a^2, a^3, a^6, ab(a^2), a^2ba}
        
        {a, a^2, a^3, ab(a^2), a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, ab(a^2), a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^7, ab(a^2), a^2ba}
        
        {a, a^2, a^3, ab(a^2), a^2ba, a^3b(a^3)}
        
        {a, a^2, a^3, ab(a^2), a^2ba, a^2bab(a^2)}
      - {a, a^2, a^3, b(a^3), a^2ba} (14 descendants)
        
        {a, a^2, a^3, a^5, b(a^3), a^2ba}
        
        {a, a^2, a^3, b(a^3), a^2ba, a^3ba}
        
        {a, a^2, a^3, b(a^3), a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^2ba}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^2ba}
        
        {a, a^2, a^3, a^6, b(a^3), a^2ba}
        
        {a, a^2, a^3, b(a^3), a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, b(a^3), a(b^2)(a^3), a^2ba}
        
        {a, a^2, a^3, a^7, b(a^3), a^2ba}
        
        {a, a^2, a^3, b(a^3), a^2ba, a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2ba, a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2ba, a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2ba, a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^5, a^2ba} (10 descendants)
        
        {a, a^2, a^3, a^5, a^2ba, a^3ba}
        
        {a, a^2, a^3, a^5, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, a^5, ab(a^3), a^2ba}
        
        {a, a^2, a^3, a^5, a^6, a^2ba}
        
        {a, a^2, a^3, a^5, a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^5, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^5, a^7, a^2ba}
        
        {a, a^2, a^3, a^5, a^2ba, a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^2ba, a^2b(a^5)}
        
        {a, a^2, a^3, a^5, a^9, a^2ba}
      - {a, a^2, a^3, a^2ba, a^3ba} (7 descendants)
        
        {a, a^2, a^3, a^2ba, a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, ab(a^3), a^2ba, a^3ba}
        
        {a, a^2, a^3, a^6, a^2ba, a^3ba}
        
        {a, a^2, a^3, a^2ba, a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^2ba, a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^7, a^2ba, a^3ba}
        
        {a, a^2, a^3, a^2ba, a^3ba, a^3b(a^3)}
      - {a, a^2, a^3, a^2ba, a^2b(a^2)} (8 descendants)
        
        {a, a^2, a^3, ab(a^3), a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, a^6, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, a^2ba, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^2ba, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^3, a^2ba, a^2b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^2ba, a^2b(a^2), a^2b(a^2)ba}
        
        {a, a^2, a^3, a^2ba, a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, a^3, ab(a^3), a^2ba} (6 descendants)
        
        {a, a^2, a^3, a^6, ab(a^3), a^2ba}
        
        {a, a^2, a^3, ab(a^3), a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, ab(a^3), a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^7, ab(a^3), a^2ba}
        
        {a, a^2, a^3, ab(a^3), a^2ba, a^3b(a^3)}
        
        {a, a^2, a^3, ab(a^3), a^2ba, a^2bab(a^3)}
      - {a, a^2, a^3, a^6, a^2ba} (4 descendants)
        
        {a, a^2, a^3, a^6, a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^6, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^6, a^7, a^2ba}
        
        {a, a^2, a^3, a^6, a^2ba, a^3b(a^3)}
      - {a, a^2, a^3, a^2ba, a^3b(a^2)} (3 descendants)
        
        {a, a^2, a^3, a^2ba, a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^7, a^2ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^2ba, a^3b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, a^2ba, a^2b(a^3)} (2 descendants)
        
        {a, a^2, a^3, a^7, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^3, a^2ba, a^2b(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^7, a^2ba} (1 descendant)
        
        {a, a^2, a^3, a^7, a^2ba, a^3b(a^3)}
      - {a, a^2, a^3, a^2ba, a^3b(a^3)} (0 descendants)
    - {a, a^2, a^3, ab(a^2)} (10 descendants)
      - {a, a^2, a^3, b(a^3), ab(a^2)} (14 descendants)
        
        {a, a^2, a^3, a^5, b(a^3), ab(a^2)}
        
        {a, a^2, a^3, b(a^3), ab(a^2), a^3ba}
        
        {a, a^2, a^3, b(a^3), ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, b(a^3), ab(a^2), ab(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), ab(a^2)}
        
        {a, a^2, a^3, a^6, b(a^3), ab(a^2)}
        
        {a, a^2, a^3, b(a^3), ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^2), a(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, b(a^3), ab(a^2)}
        
        {a, a^2, a^3, b(a^3), ab(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^2), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^2), a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^2), a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^5, ab(a^2)} (10 descendants)
        
        {a, a^2, a^3, a^5, ab(a^2), a^3ba}
        
        {a, a^2, a^3, a^5, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, a^5, ab(a^2), ab(a^3)}
        
        {a, a^2, a^3, a^5, a^6, ab(a^2)}
        
        {a, a^2, a^3, a^5, ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^5, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^5, a^7, ab(a^2)}
        
        {a, a^2, a^3, a^5, ab(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^5, ab(a^2), a^5b(a^2)}
        
        {a, a^2, a^3, a^5, a^9, ab(a^2)}
      - {a, a^2, a^3, ab(a^2), a^3ba} (8 descendants)
        
        {a, a^2, a^3, ab(a^2), a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, ab(a^2), ab(a^3), a^3ba}
        
        {a, a^2, a^3, a^6, ab(a^2), a^3ba}
        
        {a, a^2, a^3, ab(a^2), a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, ab(a^2), a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^7, ab(a^2), a^3ba}
        
        {a, a^2, a^3, ab(a^2), a^3ba, a^3b(a^3)}
        
        {a, a^2, a^3, ab(a^2), a^3ba, a^3bab(a^2)}
      - {a, a^2, a^3, ab(a^2), a^2b(a^2)} (8 descendants)
        
        {a, a^2, a^3, ab(a^2), ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, a^6, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, ab(a^2), a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, ab(a^2), a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^3, ab(a^2), a^2b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, ab(a^2), a^2b(a^2), ab(a^2)b(a^2)}
        
        {a, a^2, a^3, ab(a^2), a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, a^3, ab(a^2), ab(a^3)} (5 descendants)
        
        {a, a^2, a^3, a^6, ab(a^2), ab(a^3)}
        
        {a, a^2, a^3, ab(a^2), ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, ab(a^2), ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, ab(a^2), ab(a^3)}
        
        {a, a^2, a^3, ab(a^2), ab(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^6, ab(a^2)} (4 descendants)
        
        {a, a^2, a^3, a^6, ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^6, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^6, a^7, ab(a^2)}
        
        {a, a^2, a^3, a^6, ab(a^2), a^3b(a^3)}
      - {a, a^2, a^3, ab(a^2), a^3b(a^2)} (3 descendants)
        
        {a, a^2, a^3, ab(a^2), a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^7, ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, ab(a^2), a^3b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, ab(a^2), a^2b(a^3)} (2 descendants)
        
        {a, a^2, a^3, a^7, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, ab(a^2), a^2b(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^7, ab(a^2)} (1 descendant)
        
        {a, a^2, a^3, a^7, ab(a^2), a^3b(a^3)}
      - {a, a^2, a^3, ab(a^2), a^3b(a^3)} (0 descendants)
    - {a, a^2, a^3, b(a^3)} (14 descendants)
      - {a, a^2, a^3, a^5, b(a^3)} (14 descendants)
        
        {a, a^2, a^3, a^5, b(a^3), a^3ba}
        
        {a, a^2, a^3, a^5, b(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, a^5, b(a^3), ab(a^3)}
        
        {a, a^2, a^3, a^5, b(a^3), b^2(a^3)}
        
        {a, a^2, a^3, a^5, a^6, b(a^3)}
        
        {a, a^2, a^3, a^5, b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^5, b(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^5, b(a^3), a(b^2)(a^3)}
        
        {a, a^2, a^3, a^5, a^7, b(a^3)}
        
        {a, a^2, a^3, a^5, b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^5, b(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, a^5, b(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, a^5, b(a^3), a^3(b^2)(a^3)}
        
        {a, a^2, a^3, a^5, a^9, b(a^3)}
      - {a, a^2, a^3, b(a^3), a^3ba} (12 descendants)
        
        {a, a^2, a^3, b(a^3), a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^3ba}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^3ba}
        
        {a, a^2, a^3, a^6, b(a^3), a^3ba}
        
        {a, a^2, a^3, b(a^3), a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, b(a^3), a(b^2)(a^3), a^3ba}
        
        {a, a^2, a^3, a^7, b(a^3), a^3ba}
        
        {a, a^2, a^3, b(a^3), a^3ba, a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2(b^2)(a^3), a^3ba}
        
        {a, a^2, a^3, b(a^3), a^3ba, a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^3ba, a^3(b^2)(a^3)}
      - {a, a^2, a^3, b(a^3), a^2b(a^2)} (11 descendants)
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, a^6, b(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, b(a^3), a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^3), a(b^2)(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, a^7, b(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, b(a^3), a^2b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b(a^2), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b(a^2), a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b(a^2), a^3(b^2)(a^3)}
      - {a, a^2, a^3, b(a^3), ab(a^3)} (15 descendants)
        
        {a, a^2, a^3, b(a^3), b^2(a^3), ab(a^3)}
        
        {a, a^2, a^3, a^6, b(a^3), ab(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), bab(a^3)}
        
        {a, a^2, a^3, a^7, b(a^3), ab(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), abab(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^3(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^2bab(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^5b(a^3)}
        
        {a, a^2, a^3, b(a^3), ab(a^3), a^3bab(a^3)}
      - {a, a^2, a^3, b(a^3), b^2(a^3)} (14 descendants)
        
        {a, a^2, a^3, a^6, b(a^3), b^2(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), b^3(a^3)}
        
        {a, a^2, a^3, a^7, b(a^3), b^2(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a(b^3)(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^3(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^2(b^3)(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^4(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), b^2(a^3), a^3(b^3)(a^3)}
      - {a, a^2, a^3, a^6, b(a^3)} (8 descendants)
        
        {a, a^2, a^3, a^6, b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^6, b(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^6, b(a^3), a(b^2)(a^3)}
        
        {a, a^2, a^3, a^6, a^7, b(a^3)}
        
        {a, a^2, a^3, a^6, b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^6, b(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, a^6, b(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, a^6, b(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, b(a^3), a^3b(a^2)} (7 descendants)
        
        {a, a^2, a^3, b(a^3), a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), a(b^2)(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^7, b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), a^3b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2(b^2)(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, b(a^3), a^3b(a^2), a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^3b(a^2), a^3(b^2)(a^3)}
      - {a, a^2, a^3, b(a^3), a^2b(a^3)} (6 descendants)
        
        {a, a^2, a^3, b(a^3), a(b^2)(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, b(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2b(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, b(a^3), a(b^2)(a^3)} (5 descendants)
        
        {a, a^2, a^3, a^7, b(a^3), a(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), a(b^2)(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), a(b^2)(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, b(a^3), a(b^2)(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), a(b^2)(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, a^7, b(a^3)} (4 descendants)
        
        {a, a^2, a^3, a^7, b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^7, b(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^3, a^7, b(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, a^7, b(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, b(a^3), a^3b(a^3)} (3 descendants)
        
        {a, a^2, a^3, b(a^3), a^2(b^2)(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^3b(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^3b(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, b(a^3), a^2(b^2)(a^3)} (2 descendants)
        
        {a, a^2, a^3, b(a^3), a^2(b^2)(a^3), a^4b(a^3)}
        
        {a, a^2, a^3, b(a^3), a^2(b^2)(a^3), a^3(b^2)(a^3)}
      - {a, a^2, a^3, b(a^3), a^4b(a^3)} (1 descendant)
        
        {a, a^2, a^3, b(a^3), a^3(b^2)(a^3), a^4b(a^3)}
      - {a, a^2, a^3, b(a^3), a^3(b^2)(a^3)} (0 descendants)
    - {a, a^2, a^3, a^5} (9 descendants)
      - {a, a^2, a^3, a^5, a^3ba} (9 descendants)
        
        {a, a^2, a^3, a^5, a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, a^5, ab(a^3), a^3ba}
        
        {a, a^2, a^3, a^5, a^6, a^3ba}
        
        {a, a^2, a^3, a^5, a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^5, a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^5, a^7, a^3ba}
        
        {a, a^2, a^3, a^5, a^3ba, a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^9, a^3ba}
        
        {a, a^2, a^3, a^5, a^3ba, a^3b(a^5)}
      - {a, a^2, a^3, a^5, a^2b(a^2)} (7 descendants)
        
        {a, a^2, a^3, a^5, ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, a^5, a^6, a^2b(a^2)}
        
        {a, a^2, a^3, a^5, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^5, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^5, a^7, a^2b(a^2)}
        
        {a, a^2, a^3, a^5, a^2b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^9, a^2b(a^2)}
      - {a, a^2, a^3, a^5, ab(a^3)} (7 descendants)
        
        {a, a^2, a^3, a^5, a^6, ab(a^3)}
        
        {a, a^2, a^3, a^5, ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^5, ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^5, a^7, ab(a^3)}
        
        {a, a^2, a^3, a^5, ab(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^9, ab(a^3)}
        
        {a, a^2, a^3, a^5, ab(a^3), a^5b(a^3)}
      - {a, a^2, a^3, a^5, a^6} (6 descendants)
        
        {a, a^2, a^3, a^5, a^6, a^3b(a^2)}
        
        {a, a^2, a^3, a^5, a^6, a^2b(a^3)}
        
        {a, a^2, a^3, a^5, a^6, a^7}
        
        {a, a^2, a^3, a^5, a^6, a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^6, a^9}
        
        {a, a^2, a^3, a^5, a^6, a^10}
      - {a, a^2, a^3, a^5, a^3b(a^2)} (4 descendants)
        
        {a, a^2, a^3, a^5, a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^5, a^7, a^3b(a^2)}
        
        {a, a^2, a^3, a^5, a^3b(a^2), a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^9, a^3b(a^2)}
      - {a, a^2, a^3, a^5, a^2b(a^3)} (3 descendants)
        
        {a, a^2, a^3, a^5, a^7, a^2b(a^3)}
        
        {a, a^2, a^3, a^5, a^2b(a^3), a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^9, a^2b(a^3)}
      - {a, a^2, a^3, a^5, a^7} (3 descendants)
        
        {a, a^2, a^3, a^5, a^7, a^3b(a^3)}
        
        {a, a^2, a^3, a^5, a^7, a^9}
        
        {a, a^2, a^3, a^5, a^7, a^11}
      - {a, a^2, a^3, a^5, a^3b(a^3)} (1 descendant)
        
        {a, a^2, a^3, a^5, a^9, a^3b(a^3)}
      - {a, a^2, a^3, a^5, a^9} (0 descendants)
    - {a, a^2, a^3, a^3ba} (7 descendants)
      - {a, a^2, a^3, a^2b(a^2), a^3ba} (6 descendants)
        
        {a, a^2, a^3, ab(a^3), a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, a^6, a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, a^2b(a^2), a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^2b(a^2), a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^7, a^2b(a^2), a^3ba}
        
        {a, a^2, a^3, a^2b(a^2), a^3ba, a^3b(a^3)}
      - {a, a^2, a^3, ab(a^3), a^3ba} (6 descendants)
        
        {a, a^2, a^3, a^6, ab(a^3), a^3ba}
        
        {a, a^2, a^3, ab(a^3), a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, ab(a^3), a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^7, ab(a^3), a^3ba}
        
        {a, a^2, a^3, ab(a^3), a^3ba, a^3b(a^3)}
        
        {a, a^2, a^3, ab(a^3), a^3ba, a^3bab(a^3)}
      - {a, a^2, a^3, a^6, a^3ba} (4 descendants)
        
        {a, a^2, a^3, a^6, a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^6, a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^6, a^7, a^3ba}
        
        {a, a^2, a^3, a^6, a^3ba, a^3b(a^3)}
      - {a, a^2, a^3, a^3ba, a^3b(a^2)} (3 descendants)
        
        {a, a^2, a^3, a^2b(a^3), a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^7, a^3ba, a^3b(a^2)}
        
        {a, a^2, a^3, a^3ba, a^3b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, a^2b(a^3), a^3ba} (2 descendants)
        
        {a, a^2, a^3, a^7, a^2b(a^3), a^3ba}
        
        {a, a^2, a^3, a^2b(a^3), a^3ba, a^3b(a^3)}
      - {a, a^2, a^3, a^7, a^3ba} (1 descendant)
        
        {a, a^2, a^3, a^7, a^3ba, a^3b(a^3)}
      - {a, a^2, a^3, a^3ba, a^3b(a^3)} (0 descendants)
    - {a, a^2, a^3, a^2b(a^2)} (6 descendants)
      - {a, a^2, a^3, ab(a^3), a^2b(a^2)} (5 descendants)
        
        {a, a^2, a^3, a^6, ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, ab(a^3), a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, ab(a^3), a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^7, ab(a^3), a^2b(a^2)}
        
        {a, a^2, a^3, ab(a^3), a^2b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, a^6, a^2b(a^2)} (4 descendants)
        
        {a, a^2, a^3, a^6, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^6, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^6, a^7, a^2b(a^2)}
        
        {a, a^2, a^3, a^6, a^2b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, a^2b(a^2), a^3b(a^2)} (3 descendants)
        
        {a, a^2, a^3, a^2b(a^2), a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^7, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^3, a^2b(a^2), a^3b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, a^2b(a^2), a^2b(a^3)} (2 descendants)
        
        {a, a^2, a^3, a^7, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^3, a^2b(a^2), a^2b(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^7, a^2b(a^2)} (1 descendant)
        
        {a, a^2, a^3, a^7, a^2b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, a^2b(a^2), a^3b(a^3)} (0 descendants)
    - {a, a^2, a^3, ab(a^3)} (5 descendants)
      - {a, a^2, a^3, a^6, ab(a^3)} (4 descendants)
        
        {a, a^2, a^3, a^6, ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^6, ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, a^6, a^7, ab(a^3)}
        
        {a, a^2, a^3, a^6, ab(a^3), a^3b(a^3)}
      - {a, a^2, a^3, ab(a^3), a^3b(a^2)} (3 descendants)
        
        {a, a^2, a^3, ab(a^3), a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^7, ab(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, ab(a^3), a^3b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, ab(a^3), a^2b(a^3)} (2 descendants)
        
        {a, a^2, a^3, a^7, ab(a^3), a^2b(a^3)}
        
        {a, a^2, a^3, ab(a^3), a^2b(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^7, ab(a^3)} (1 descendant)
        
        {a, a^2, a^3, a^7, ab(a^3), a^3b(a^3)}
      - {a, a^2, a^3, ab(a^3), a^3b(a^3)} (0 descendants)
    - {a, a^2, a^3, a^6} (4 descendants)
      - {a, a^2, a^3, a^6, a^3b(a^2)} (3 descendants)
        
        {a, a^2, a^3, a^6, a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^6, a^7, a^3b(a^2)}
        
        {a, a^2, a^3, a^6, a^3b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, a^6, a^2b(a^3)} (2 descendants)
        
        {a, a^2, a^3, a^6, a^7, a^2b(a^3)}
        
        {a, a^2, a^3, a^6, a^2b(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^6, a^7} (2 descendants)
        
        {a, a^2, a^3, a^6, a^7, a^3b(a^3)}
        
        {a, a^2, a^3, a^6, a^7, a^11}
      - {a, a^2, a^3, a^6, a^3b(a^3)} (0 descendants)
    - {a, a^2, a^3, a^3b(a^2)} (3 descendants)
      - {a, a^2, a^3, a^2b(a^3), a^3b(a^2)} (2 descendants)
        
        {a, a^2, a^3, a^7, a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, a^3, a^2b(a^3), a^3b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, a^7, a^3b(a^2)} (1 descendant)
        
        {a, a^2, a^3, a^7, a^3b(a^2), a^3b(a^3)}
      - {a, a^2, a^3, a^3b(a^2), a^3b(a^3)} (0 descendants)
    - {a, a^2, a^3, a^2b(a^3)} (2 descendants)
      - {a, a^2, a^3, a^7, a^2b(a^3)} (1 descendant)
        
        {a, a^2, a^3, a^7, a^2b(a^3), a^3b(a^3)}
      - {a, a^2, a^3, a^2b(a^3), a^3b(a^3)} (0 descendants)
    - {a, a^2, a^3, a^7} (1 descendant)
      - {a, a^2, a^3, a^7, a^3b(a^3)} (0 descendants)
    - {a, a^2, a^3, a^3b(a^3)} (0 descendants)
  - {a, a^2, a^2b} (11 descendants)
    - {a, a^2, a^2b, aba} (11 descendants)
      - {a, a^2, b(a^2), a^2b, aba} (15 descendants)
        
        {a, a^2, a^4, b(a^2), a^2b, aba}
        
        {a, a^2, b(a^2), a^2b, aba, a^2ba}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), aba}
        
        {a, a^2, b(a^2), a^2b, aba, ab(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), aba}
        
        {a, a^2, a^5, b(a^2), a^2b, aba}
        
        {a, a^2, b(a^2), a^2b, aba, a^2b(a^2)}
        
        {a, a^2, b(a^2), a^2b, aba, a^2(b^2)a}
        
        {a, a^2, b(a^2), a^2b, aba, ababa}
        
        {a, a^2, b(a^2), a^2b, aba, a(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, aba, a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2b, aba, a^2b(a^3)}
        
        {a, a^2, b(a^2), a^2b, aba, a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, aba, a^2bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, aba, a^2(b^3)(a^2)}
      - {a, a^2, a^4, a^2b, aba} (12 descendants)
        
        {a, a^2, a^4, a^2b, aba, a^2ba}
        
        {a, a^2, a^4, a^2b, a^2(b^2), aba}
        
        {a, a^2, a^4, a^2b, aba, ab(a^2)}
        
        {a, a^2, a^4, a^5, a^2b, aba}
        
        {a, a^2, a^4, a^2b, aba, a^2b(a^2)}
        
        {a, a^2, a^4, a^2b, aba, a^2(b^2)a}
        
        {a, a^2, a^4, a^2b, aba, ababa}
        
        {a, a^2, a^4, a^2b, aba, a^4ba}
        
        {a, a^2, a^4, a^2b, aba, a^2b(a^3)}
        
        {a, a^2, a^4, a^2b, aba, a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^2b, aba, ab(a^4)}
        
        {a, a^2, a^4, a^7, a^2b, aba}
      - {a, a^2, a^2b, aba, a^2ba} (12 descendants)
        
        {a, a^2, a^2b, a^2(b^2), aba, a^2ba}
        
        {a, a^2, a^2b, aba, ab(a^2), a^2ba}
        
        {a, a^2, a^5, a^2b, aba, a^2ba}
        
        {a, a^2, a^2b, aba, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^2b, aba, a^2ba, a^2bab}
        
        {a, a^2, a^2b, aba, a^2ba, a^2(b^2)a}
        
        {a, a^2, a^2b, aba, a^2ba, ababa}
        
        {a, a^2, a^2b, aba, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^2b, aba, a^2ba, a^2baba}
        
        {a, a^2, a^2b, aba, a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, aba, a^2ba, a^2b(a^4)}
        
        {a, a^2, a^2b, aba, a^2ba, a^2bab(a^2)}
      - {a, a^2, a^2b, a^2(b^2), aba} (11 descendants)
        
        {a, a^2, a^2b, a^2(b^2), aba, ab(a^2)}
        
        {a, a^2, a^5, a^2b, a^2(b^2), aba}
        
        {a, a^2, a^2b, a^2(b^2), aba, a^2b(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), aba, a^2(b^2)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), aba}
        
        {a, a^2, a^2b, a^2(b^2), aba, ababa}
        
        {a, a^2, a^2b, a^2(b^2), aba, a^2b(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), aba, a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), aba, a^2(b^3)a}
        
        {a, a^2, a^2b, a^2(b^2), aba, a^2(b^2)(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), aba, a^2(b^3)(a^2)}
      - {a, a^2, a^2b, aba, ab(a^2)} (8 descendants)
        
        {a, a^2, a^5, a^2b, aba, ab(a^2)}
        
        {a, a^2, a^2b, aba, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^2b, aba, ab(a^2), a^2(b^2)a}
        
        {a, a^2, a^2b, aba, ab(a^2), ab(a^2)b}
        
        {a, a^2, a^2b, aba, ab(a^2), ababa}
        
        {a, a^2, a^2b, aba, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^2b, aba, ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, aba, ab(a^2), abab(a^2)}
      - {a, a^2, a^5, a^2b, aba} (5 descendants)
        
        {a, a^2, a^5, a^2b, aba, a^2b(a^2)}
        
        {a, a^2, a^5, a^2b, aba, a^2(b^2)a}
        
        {a, a^2, a^5, a^2b, aba, ababa}
        
        {a, a^2, a^5, a^2b, aba, a^2b(a^3)}
        
        {a, a^2, a^5, a^2b, aba, a^2(b^2)(a^2)}
      - {a, a^2, a^2b, aba, a^2b(a^2)} (5 descendants)
        
        {a, a^2, a^2b, aba, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, a^2b, aba, a^2b(a^2), ababa}
        
        {a, a^2, a^2b, aba, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^2b, aba, a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, aba, a^2b(a^2), a^2b(a^2)ba}
      - {a, a^2, a^2b, aba, a^2(b^2)a} (4 descendants)
        
        {a, a^2, a^2b, aba, a^2(b^2)a, ababa}
        
        {a, a^2, a^2b, aba, a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, a^2b, aba, a^2(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, aba, a^2(b^2)a, a^2(b^2)aba}
      - {a, a^2, a^2b, aba, ababa} (3 descendants)
        
        {a, a^2, a^2b, aba, a^2b(a^3), ababa}
        
        {a, a^2, a^2b, aba, a^2(b^2)(a^2), ababa}
        
        {a, a^2, a^2b, aba, ababa, abababa}
      - {a, a^2, a^2b, aba, a^2b(a^3)} (1 descendant)
        
        {a, a^2, a^2b, aba, a^2b(a^3), a^2(b^2)(a^2)}
      - {a, a^2, a^2b, aba, a^2(b^2)(a^2)} (0 descendants)
    - {a, a^2, b(a^2), a^2b} (14 descendants)
      - {a, a^2, a^4, b(a^2), a^2b} (14 descendants)
        
        {a, a^2, a^4, b(a^2), a^2b, a^2ba}
        
        {a, a^2, a^4, b(a^2), a^2b, a^2(b^2)}
        
        {a, a^2, a^4, b(a^2), a^2b, ab(a^2)}
        
        {a, a^2, a^4, b(a^2), a^2b, b^2(a^2)}
        
        {a, a^2, a^4, a^5, b(a^2), a^2b}
        
        {a, a^2, a^4, b(a^2), a^2b, a^2b(a^2)}
        
        {a, a^2, a^4, b(a^2), a^2b, a^2(b^2)a}
        
        {a, a^2, a^4, b(a^2), a^2b, a(b^2)(a^2)}
        
        {a, a^2, a^4, b(a^2), a^2b, a^3b(a^2)}
        
        {a, a^2, a^4, b(a^2), a^2b, a^2b(a^3)}
        
        {a, a^2, a^4, b(a^2), a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, b(a^2), a^2b}
        
        {a, a^2, a^4, b(a^2), a^2b, a^2bab(a^2)}
        
        {a, a^2, a^4, b(a^2), a^2b, a^2(b^3)(a^2)}
      - {a, a^2, b(a^2), a^2b, a^2ba} (17 descendants)
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2ba}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a^2ba}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a^2ba}
        
        {a, a^2, a^5, b(a^2), a^2b, a^2ba}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^2b(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^2bab}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^2(b^2)a}
        
        {a, a^2, b(a^2), a^2b, a(b^2)(a^2), a^2ba}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^2b(a^3)}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^2baba}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^2b(a^4)}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^2bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^2(b^3)(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^2b(a^2)b(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2ba, a^2ba(b^2)(a^2)}
      - {a, a^2, b(a^2), a^2b, a^2(b^2)} (16 descendants)
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), ab(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), b^2(a^2)}
        
        {a, a^2, a^5, b(a^2), a^2b, a^2(b^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2b(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2(b^2)a}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2(b^3)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2b(a^3)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2(b^3)a}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2(b^2)(a^3)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2(b^3)(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2(b^2)ab(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2), a^2(b^4)(a^2)}
      - {a, a^2, b(a^2), a^2b, ab(a^2)} (15 descendants)
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), ab(a^2)}
        
        {a, a^2, a^5, b(a^2), a^2b, ab(a^2)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a^2b(a^2)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a^2(b^2)a}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a^2b(a^3)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), abab(a^2)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a^4b(a^2)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a^2bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a^2(b^3)(a^2)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a^2b(a^2)b(a^2)}
        
        {a, a^2, b(a^2), a^2b, ab(a^2), a^2(b^2)ab(a^2)}
      - {a, a^2, b(a^2), a^2b, b^2(a^2)} (14 descendants)
        
        {a, a^2, a^5, b(a^2), a^2b, b^2(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a^2b(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a^2(b^2)a}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), b^3(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a^2b(a^3)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a(b^3)(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a^2bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a^2(b^3)(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a^2ba(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, b^2(a^2), a^2(b^4)(a^2)}
      - {a, a^2, a^5, b(a^2), a^2b} (8 descendants)
        
        {a, a^2, a^5, b(a^2), a^2b, a^2b(a^2)}
        
        {a, a^2, a^5, b(a^2), a^2b, a^2(b^2)a}
        
        {a, a^2, a^5, b(a^2), a^2b, a(b^2)(a^2)}
        
        {a, a^2, a^5, b(a^2), a^2b, a^3b(a^2)}
        
        {a, a^2, a^5, b(a^2), a^2b, a^2b(a^3)}
        
        {a, a^2, a^5, b(a^2), a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^5, b(a^2), a^2b, a^2bab(a^2)}
        
        {a, a^2, a^5, b(a^2), a^2b, a^2(b^3)(a^2)}
      - {a, a^2, b(a^2), a^2b, a^2b(a^2)} (8 descendants)
        
        {a, a^2, b(a^2), a^2b, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, b(a^2), a^2b, a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, b(a^2), a^2b, a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2b(a^2), a^2bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2b(a^2), a^2(b^3)(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2b(a^2), a^2b(a^3)b(a^2)}
      - {a, a^2, b(a^2), a^2b, a^2(b^2)a} (6 descendants)
        
        {a, a^2, b(a^2), a^2b, a(b^2)(a^2), a^2(b^2)a}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2)a, a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2)a, a^2bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2)a, a^2(b^3)(a^2)}
      - {a, a^2, b(a^2), a^2b, a(b^2)(a^2)} (5 descendants)
        
        {a, a^2, b(a^2), a^2b, a(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2b, a(b^2)(a^2), a^2b(a^3)}
        
        {a, a^2, b(a^2), a^2b, a(b^2)(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, a(b^2)(a^2), a^2bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, a(b^2)(a^2), a^2(b^3)(a^2)}
      - {a, a^2, b(a^2), a^2b, a^3b(a^2)} (4 descendants)
        
        {a, a^2, b(a^2), a^2b, a^2b(a^3), a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^3b(a^2), a^2bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^3)(a^2), a^3b(a^2)}
      - {a, a^2, b(a^2), a^2b, a^2b(a^3)} (3 descendants)
        
        {a, a^2, b(a^2), a^2b, a^2b(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2b(a^3), a^2bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2b(a^3), a^2(b^3)(a^2)}
      - {a, a^2, b(a^2), a^2b, a^2(b^2)(a^2)} (2 descendants)
        
        {a, a^2, b(a^2), a^2b, a^2(b^2)(a^2), a^2bab(a^2)}
        
        {a, a^2, b(a^2), a^2b, a^2(b^2)(a^2), a^2(b^3)(a^2)}
      - {a, a^2, b(a^2), a^2b, a^2bab(a^2)} (1 descendant)
        
        {a, a^2, b(a^2), a^2b, a^2(b^3)(a^2), a^2bab(a^2)}
      - {a, a^2, b(a^2), a^2b, a^2(b^3)(a^2)} (0 descendants)
    - {a, a^2, a^4, a^2b} (9 descendants)
      - {a, a^2, a^4, a^2b, a^2ba} (12 descendants)
        
        {a, a^2, a^4, a^2b, a^2(b^2), a^2ba}
        
        {a, a^2, a^4, a^2b, ab(a^2), a^2ba}
        
        {a, a^2, a^4, a^5, a^2b, a^2ba}
        
        {a, a^2, a^4, a^2b, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^4, a^2b, a^2ba, a^2bab}
        
        {a, a^2, a^4, a^2b, a^2ba, a^2(b^2)a}
        
        {a, a^2, a^4, a^2b, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^4, a^2b, a^2ba, a^2baba}
        
        {a, a^2, a^4, a^2b, a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, a^2b, a^2ba}
        
        {a, a^2, a^4, a^2b, a^2ba, a^2b(a^4)}
        
        {a, a^2, a^4, a^2b, a^2ba, a^2bab(a^2)}
      - {a, a^2, a^4, a^2b, a^2(b^2)} (11 descendants)
        
        {a, a^2, a^4, a^2b, a^2(b^2), ab(a^2)}
        
        {a, a^2, a^4, a^5, a^2b, a^2(b^2)}
        
        {a, a^2, a^4, a^2b, a^2(b^2), a^2b(a^2)}
        
        {a, a^2, a^4, a^2b, a^2(b^2), a^2(b^2)a}
        
        {a, a^2, a^4, a^2b, a^2(b^2), a^2(b^3)}
        
        {a, a^2, a^4, a^2b, a^2(b^2), a^2b(a^3)}
        
        {a, a^2, a^4, a^2b, a^2(b^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^2b, a^2(b^2), a^2(b^3)a}
        
        {a, a^2, a^4, a^7, a^2b, a^2(b^2)}
        
        {a, a^2, a^4, a^2b, a^2(b^2), a^2(b^2)(a^3)}
        
        {a, a^2, a^4, a^2b, a^2(b^2), a^2(b^3)(a^2)}
      - {a, a^2, a^4, a^2b, ab(a^2)} (7 descendants)
        
        {a, a^2, a^4, a^5, a^2b, ab(a^2)}
        
        {a, a^2, a^4, a^2b, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, a^2b, ab(a^2), a^2(b^2)a}
        
        {a, a^2, a^4, a^2b, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^4, a^2b, ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, a^2b, ab(a^2)}
        
        {a, a^2, a^4, a^2b, ab(a^2), a^4b(a^2)}
      - {a, a^2, a^4, a^5, a^2b} (7 descendants)
        
        {a, a^2, a^4, a^5, a^2b, a^2b(a^2)}
        
        {a, a^2, a^4, a^5, a^2b, a^2(b^2)a}
        
        {a, a^2, a^4, a^5, a^2b, a^5b}
        
        {a, a^2, a^4, a^5, a^2b, a^2b(a^3)}
        
        {a, a^2, a^4, a^5, a^2b, a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^5, a^7, a^2b}
        
        {a, a^2, a^4, a^5, a^8, a^2b}
      - {a, a^2, a^4, a^2b, a^2b(a^2)} (5 descendants)
        
        {a, a^2, a^4, a^2b, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, a^4, a^2b, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^4, a^2b, a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, a^2b, a^2b(a^2)}
        
        {a, a^2, a^4, a^2b, a^2b(a^2), a^2b(a^5)}
      - {a, a^2, a^4, a^2b, a^2(b^2)a} (4 descendants)
        
        {a, a^2, a^4, a^2b, a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, a^4, a^2b, a^2(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, a^2b, a^2(b^2)a}
        
        {a, a^2, a^4, a^2b, a^2(b^2)a, a^2(b^2)(a^4)}
      - {a, a^2, a^4, a^2b, a^2b(a^3)} (2 descendants)
        
        {a, a^2, a^4, a^2b, a^2b(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, a^2b, a^2b(a^3)}
      - {a, a^2, a^4, a^2b, a^2(b^2)(a^2)} (1 descendant)
        
        {a, a^2, a^4, a^7, a^2b, a^2(b^2)(a^2)}
      - {a, a^2, a^4, a^7, a^2b} (0 descendants)
    - {a, a^2, a^2b, a^2ba} (11 descendants)
      - {a, a^2, a^2b, a^2(b^2), a^2ba} (14 descendants)
        
        {a, a^2, a^2b, a^2(b^2), ab(a^2), a^2ba}
        
        {a, a^2, a^5, a^2b, a^2(b^2), a^2ba}
        
        {a, a^2, a^2b, a^2(b^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), a^2ba, a^2bab}
        
        {a, a^2, a^2b, a^2(b^2), a^2ba, a^2(b^2)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2ba}
        
        {a, a^2, a^2b, a^2(b^2), a^2ba, a^2b(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), a^2ba, a^2baba}
        
        {a, a^2, a^2b, a^2(b^2), a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), a^2ba, a^2(b^3)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2ba, a^2b(a^4)}
        
        {a, a^2, a^2b, a^2(b^2), a^2ba, a^2bab(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), a^2ba, a^2(b^2)(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), a^2ba, a^2(b^3)(a^2)}
      - {a, a^2, a^2b, ab(a^2), a^2ba} (9 descendants)
        
        {a, a^2, a^5, a^2b, ab(a^2), a^2ba}
        
        {a, a^2, a^2b, ab(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, a^2b, ab(a^2), a^2ba, a^2bab}
        
        {a, a^2, a^2b, ab(a^2), a^2ba, a^2(b^2)a}
        
        {a, a^2, a^2b, ab(a^2), a^2ba, a^2b(a^3)}
        
        {a, a^2, a^2b, ab(a^2), a^2ba, a^2baba}
        
        {a, a^2, a^2b, ab(a^2), a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, ab(a^2), a^2ba, a^2b(a^4)}
        
        {a, a^2, a^2b, ab(a^2), a^2ba, a^2bab(a^2)}
      - {a, a^2, a^5, a^2b, a^2ba} (8 descendants)
        
        {a, a^2, a^5, a^2b, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^5, a^2b, a^2ba, a^2bab}
        
        {a, a^2, a^5, a^2b, a^2ba, a^2(b^2)a}
        
        {a, a^2, a^5, a^2b, a^2ba, a^2b(a^3)}
        
        {a, a^2, a^5, a^2b, a^2ba, a^2baba}
        
        {a, a^2, a^5, a^2b, a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, a^5, a^2b, a^2ba, a^2b(a^4)}
        
        {a, a^2, a^5, a^2b, a^2ba, a^2bab(a^2)}
      - {a, a^2, a^2b, a^2ba, a^2b(a^2)} (11 descendants)
        
        {a, a^2, a^2b, a^2ba, a^2b(a^2), a^2bab}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^2), a^2b(a^2)b}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^2), a^2baba}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^2), a^2b(a^4)}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^2), a^2b(a^2)ba}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^2), a^2bab(a^2)}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^2), a^2b(a^5)}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, a^2b, a^2ba, a^2bab} (10 descendants)
        
        {a, a^2, a^2b, a^2ba, a^2(b^2)a, a^2bab}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^3), a^2bab}
        
        {a, a^2, a^2b, a^2ba, a^2bab, a^2baba}
        
        {a, a^2, a^2b, a^2ba, a^2bab, a^2ba(b^2)}
        
        {a, a^2, a^2b, a^2ba, a^2(b^2)(a^2), a^2bab}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^4), a^2bab}
        
        {a, a^2, a^2b, a^2ba, a^2bab, a^2bab(a^2)}
        
        {a, a^2, a^2b, a^2ba, a^2bab, a^2ba(b^2)a}
        
        {a, a^2, a^2b, a^2ba, a^2bab, a^2bab(a^3)}
        
        {a, a^2, a^2b, a^2ba, a^2bab, a^2ba(b^2)(a^2)}
      - {a, a^2, a^2b, a^2ba, a^2(b^2)a} (5 descendants)
        
        {a, a^2, a^2b, a^2ba, a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, a^2b, a^2ba, a^2(b^2)a, a^2baba}
        
        {a, a^2, a^2b, a^2ba, a^2(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^4), a^2(b^2)a}
        
        {a, a^2, a^2b, a^2ba, a^2(b^2)a, a^2bab(a^2)}
      - {a, a^2, a^2b, a^2ba, a^2b(a^3)} (4 descendants)
        
        {a, a^2, a^2b, a^2ba, a^2b(a^3), a^2baba}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^3), a^2b(a^4)}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^3), a^2bab(a^2)}
      - {a, a^2, a^2b, a^2ba, a^2baba} (3 descendants)
        
        {a, a^2, a^2b, a^2ba, a^2(b^2)(a^2), a^2baba}
        
        {a, a^2, a^2b, a^2ba, a^2b(a^4), a^2baba}
        
        {a, a^2, a^2b, a^2ba, a^2baba, a^2bab(a^2)}
      - {a, a^2, a^2b, a^2ba, a^2(b^2)(a^2)} (2 descendants)
        
        {a, a^2, a^2b, a^2ba, a^2b(a^4), a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2ba, a^2(b^2)(a^2), a^2bab(a^2)}
      - {a, a^2, a^2b, a^2ba, a^2b(a^4)} (1 descendant)
        
        {a, a^2, a^2b, a^2ba, a^2b(a^4), a^2bab(a^2)}
      - {a, a^2, a^2b, a^2ba, a^2bab(a^2)} (0 descendants)
    - {a, a^2, a^2b, a^2(b^2)} (10 descendants)
      - {a, a^2, a^2b, a^2(b^2), ab(a^2)} (9 descendants)
        
        {a, a^2, a^5, a^2b, a^2(b^2), ab(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), ab(a^2), a^2(b^2)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), ab(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), ab(a^2), a^2(b^3)a}
        
        {a, a^2, a^2b, a^2(b^2), ab(a^2), a^2(b^2)(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), ab(a^2), a^2(b^3)(a^2)}
      - {a, a^2, a^5, a^2b, a^2(b^2)} (8 descendants)
        
        {a, a^2, a^5, a^2b, a^2(b^2), a^2b(a^2)}
        
        {a, a^2, a^5, a^2b, a^2(b^2), a^2(b^2)a}
        
        {a, a^2, a^5, a^2b, a^2(b^2), a^2(b^3)}
        
        {a, a^2, a^5, a^2b, a^2(b^2), a^2b(a^3)}
        
        {a, a^2, a^5, a^2b, a^2(b^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^5, a^2b, a^2(b^2), a^2(b^3)a}
        
        {a, a^2, a^5, a^2b, a^2(b^2), a^2(b^2)(a^3)}
        
        {a, a^2, a^5, a^2b, a^2(b^2), a^2(b^3)(a^2)}
      - {a, a^2, a^2b, a^2(b^2), a^2b(a^2)} (7 descendants)
        
        {a, a^2, a^2b, a^2(b^2), a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2b(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), a^2b(a^2), a^2(b^3)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2b(a^2), a^2(b^2)(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), a^2b(a^2), a^2(b^3)(a^2)}
      - {a, a^2, a^2b, a^2(b^2), a^2(b^2)a} (10 descendants)
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2(b^2)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)a, a^2(b^2)ab}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)a, a^2(b^3)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)a, a^2(b^2)(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)a, a^2(b^2)aba}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)a, a^2(b^3)(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)a, a^2(b^2)(a^4)}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)a, a^2(b^2)ab(a^2)}
      - {a, a^2, a^2b, a^2(b^2), a^2(b^3)} (9 descendants)
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2b(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2(b^3)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2(b^4)}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2(b^3)(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2(b^4)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2(b^3)(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3), a^2(b^4)(a^2)}
      - {a, a^2, a^2b, a^2(b^2), a^2b(a^3)} (4 descendants)
        
        {a, a^2, a^2b, a^2(b^2), a^2b(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2(b^2), a^2b(a^3), a^2(b^3)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2b(a^3), a^2(b^2)(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), a^2b(a^3), a^2(b^3)(a^2)}
      - {a, a^2, a^2b, a^2(b^2), a^2(b^2)(a^2)} (3 descendants)
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)(a^2), a^2(b^3)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)(a^2), a^2(b^2)(a^3)}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)(a^2), a^2(b^3)(a^2)}
      - {a, a^2, a^2b, a^2(b^2), a^2(b^3)a} (2 descendants)
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)(a^3), a^2(b^3)a}
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^3)a, a^2(b^3)(a^2)}
      - {a, a^2, a^2b, a^2(b^2), a^2(b^2)(a^3)} (1 descendant)
        
        {a, a^2, a^2b, a^2(b^2), a^2(b^2)(a^3), a^2(b^3)(a^2)}
      - {a, a^2, a^2b, a^2(b^2), a^2(b^3)(a^2)} (0 descendants)
    - {a, a^2, a^2b, ab(a^2)} (5 descendants)
      - {a, a^2, a^5, a^2b, ab(a^2)} (4 descendants)
        
        {a, a^2, a^5, a^2b, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^5, a^2b, ab(a^2), a^2(b^2)a}
        
        {a, a^2, a^5, a^2b, ab(a^2), a^2b(a^3)}
        
        {a, a^2, a^5, a^2b, ab(a^2), a^2(b^2)(a^2)}
      - {a, a^2, a^2b, ab(a^2), a^2b(a^2)} (5 descendants)
        
        {a, a^2, a^2b, ab(a^2), a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, a^2b, ab(a^2), a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^2b, ab(a^2), a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, ab(a^2), a^2b(a^2), ab(a^2)b(a^2)}
        
        {a, a^2, a^2b, ab(a^2), a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, a^2b, ab(a^2), a^2(b^2)a} (3 descendants)
        
        {a, a^2, a^2b, ab(a^2), a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, a^2b, ab(a^2), a^2(b^2)a, a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, ab(a^2), a^2(b^2)a, a^2(b^2)ab(a^2)}
      - {a, a^2, a^2b, ab(a^2), a^2b(a^3)} (1 descendant)
        
        {a, a^2, a^2b, ab(a^2), a^2b(a^3), a^2(b^2)(a^2)}
      - {a, a^2, a^2b, ab(a^2), a^2(b^2)(a^2)} (0 descendants)
    - {a, a^2, a^5, a^2b} (4 descendants)
      - {a, a^2, a^5, a^2b, a^2b(a^2)} (3 descendants)
        
        {a, a^2, a^5, a^2b, a^2b(a^2), a^2(b^2)a}
        
        {a, a^2, a^5, a^2b, a^2b(a^2), a^2b(a^3)}
        
        {a, a^2, a^5, a^2b, a^2b(a^2), a^2(b^2)(a^2)}
      - {a, a^2, a^5, a^2b, a^2(b^2)a} (2 descendants)
        
        {a, a^2, a^5, a^2b, a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, a^5, a^2b, a^2(b^2)a, a^2(b^2)(a^2)}
      - {a, a^2, a^5, a^2b, a^2b(a^3)} (1 descendant)
        
        {a, a^2, a^5, a^2b, a^2b(a^3), a^2(b^2)(a^2)}
      - {a, a^2, a^5, a^2b, a^2(b^2)(a^2)} (0 descendants)
    - {a, a^2, a^2b, a^2b(a^2)} (3 descendants)
      - {a, a^2, a^2b, a^2b(a^2), a^2(b^2)a} (2 descendants)
        
        {a, a^2, a^2b, a^2b(a^2), a^2b(a^3), a^2(b^2)a}
        
        {a, a^2, a^2b, a^2b(a^2), a^2(b^2)a, a^2(b^2)(a^2)}
      - {a, a^2, a^2b, a^2b(a^2), a^2b(a^3)} (3 descendants)
        
        {a, a^2, a^2b, a^2b(a^2), a^2b(a^3), a^2(b^2)(a^2)}
        
        {a, a^2, a^2b, a^2b(a^2), a^2b(a^3), a^2b(a^3)b}
        
        {a, a^2, a^2b, a^2b(a^2), a^2b(a^3), a^2b(a^3)b(a^2)}
      - {a, a^2, a^2b, a^2b(a^2), a^2(b^2)(a^2)} (0 descendants)
    - {a, a^2, a^2b, a^2(b^2)a} (2 descendants)
      - {a, a^2, a^2b, a^2b(a^3), a^2(b^2)a} (1 descendant)
        
        {a, a^2, a^2b, a^2b(a^3), a^2(b^2)a, a^2(b^2)(a^2)}
      - {a, a^2, a^2b, a^2(b^2)a, a^2(b^2)(a^2)} (1 descendant)
        
        {a, a^2, a^2b, a^2(b^2)a, a^2(b^2)(a^2), a^2(b^2)(a^2)b}
    - {a, a^2, a^2b, a^2b(a^3)} (1 descendant)
      - {a, a^2, a^2b, a^2b(a^3), a^2(b^2)(a^2)} (0 descendants)
    - {a, a^2, a^2b, a^2(b^2)(a^2)} (0 descendants)
  - {a, a^2, aba} (7 descendants)
    - {a, a^2, b(a^2), aba} (10 descendants)
      - {a, a^2, a^4, b(a^2), aba} (12 descendants)
        
        {a, a^2, a^4, b(a^2), aba, a^2ba}
        
        {a, a^2, a^4, b(a^2), aba, ab(a^2)}
        
        {a, a^2, a^4, b(a^2), b^2(a^2), aba}
        
        {a, a^2, a^4, a^5, b(a^2), aba}
        
        {a, a^2, a^4, b(a^2), aba, a^2b(a^2)}
        
        {a, a^2, a^4, b(a^2), aba, ababa}
        
        {a, a^2, a^4, b(a^2), aba, a(b^2)(a^2)}
        
        {a, a^2, a^4, b(a^2), aba, a^4ba}
        
        {a, a^2, a^4, b(a^2), aba, a^3b(a^2)}
        
        {a, a^2, a^4, b(a^2), aba, a^2(b^2)(a^2)}
        
        {a, a^2, a^4, b(a^2), aba, ab(a^4)}
        
        {a, a^2, a^4, a^7, b(a^2), aba}
      - {a, a^2, b(a^2), aba, a^2ba} (10 descendants)
        
        {a, a^2, b(a^2), aba, ab(a^2), a^2ba}
        
        {a, a^2, b(a^2), b^2(a^2), aba, a^2ba}
        
        {a, a^2, a^5, b(a^2), aba, a^2ba}
        
        {a, a^2, b(a^2), aba, a^2ba, a^2b(a^2)}
        
        {a, a^2, b(a^2), aba, a^2ba, ababa}
        
        {a, a^2, b(a^2), aba, a(b^2)(a^2), a^2ba}
        
        {a, a^2, b(a^2), aba, a^2ba, b(a^2)ba}
        
        {a, a^2, b(a^2), aba, a^2ba, a^3b(a^2)}
        
        {a, a^2, b(a^2), aba, a^2ba, a^2baba}
        
        {a, a^2, b(a^2), aba, a^2ba, a^2(b^2)(a^2)}
      - {a, a^2, b(a^2), aba, ab(a^2)} (11 descendants)
        
        {a, a^2, b(a^2), b^2(a^2), aba, ab(a^2)}
        
        {a, a^2, a^5, b(a^2), aba, ab(a^2)}
        
        {a, a^2, b(a^2), aba, ab(a^2), a^2b(a^2)}
        
        {a, a^2, b(a^2), aba, ab(a^2), ababa}
        
        {a, a^2, b(a^2), aba, ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, b(a^2), aba, ab(a^2), bab(a^2)}
        
        {a, a^2, b(a^2), aba, ab(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), aba, ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), aba, ab(a^2), abab(a^2)}
        
        {a, a^2, b(a^2), aba, ab(a^2), a^4b(a^2)}
        
        {a, a^2, b(a^2), aba, ab(a^2), a^2bab(a^2)}
      - {a, a^2, b(a^2), b^2(a^2), aba} (10 descendants)
        
        {a, a^2, a^5, b(a^2), b^2(a^2), aba}
        
        {a, a^2, b(a^2), b^2(a^2), aba, a^2b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), aba, ababa}
        
        {a, a^2, b(a^2), b^2(a^2), aba, a(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), aba}
        
        {a, a^2, b(a^2), b^2(a^2), aba, a^3b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), aba, a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), aba, a(b^3)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), aba, a^3(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), aba, a^2(b^3)(a^2)}
      - {a, a^2, a^5, b(a^2), aba} (5 descendants)
        
        {a, a^2, a^5, b(a^2), aba, a^2b(a^2)}
        
        {a, a^2, a^5, b(a^2), aba, ababa}
        
        {a, a^2, a^5, b(a^2), aba, a(b^2)(a^2)}
        
        {a, a^2, a^5, b(a^2), aba, a^3b(a^2)}
        
        {a, a^2, a^5, b(a^2), aba, a^2(b^2)(a^2)}
      - {a, a^2, b(a^2), aba, a^2b(a^2)} (5 descendants)
        
        {a, a^2, b(a^2), aba, a^2b(a^2), ababa}
        
        {a, a^2, b(a^2), aba, a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, b(a^2), aba, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), aba, a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), aba, a^2b(a^2), ab(a^2)b(a^2)}
      - {a, a^2, b(a^2), aba, ababa} (4 descendants)
        
        {a, a^2, b(a^2), aba, a(b^2)(a^2), ababa}
        
        {a, a^2, b(a^2), aba, a^3b(a^2), ababa}
        
        {a, a^2, b(a^2), aba, a^2(b^2)(a^2), ababa}
        
        {a, a^2, b(a^2), aba, ababa, abababa}
      - {a, a^2, b(a^2), aba, a(b^2)(a^2)} (3 descendants)
        
        {a, a^2, b(a^2), aba, a(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), aba, a(b^2)(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), aba, a(b^2)(a^2), aba(b^2)(a^2)}
      - {a, a^2, b(a^2), aba, a^3b(a^2)} (1 descendant)
        
        {a, a^2, b(a^2), aba, a^2(b^2)(a^2), a^3b(a^2)}
      - {a, a^2, b(a^2), aba, a^2(b^2)(a^2)} (0 descendants)
    - {a, a^2, a^4, aba} (8 descendants)
      - {a, a^2, a^4, aba, a^2ba} (9 descendants)
        
        {a, a^2, a^4, aba, ab(a^2), a^2ba}
        
        {a, a^2, a^4, a^5, aba, a^2ba}
        
        {a, a^2, a^4, aba, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^4, aba, a^2ba, ababa}
        
        {a, a^2, a^4, aba, a^2ba, a^4ba}
        
        {a, a^2, a^4, aba, a^2ba, a^2baba}
        
        {a, a^2, a^4, aba, ab(a^4), a^2ba}
        
        {a, a^2, a^4, a^7, aba, a^2ba}
        
        {a, a^2, a^4, aba, a^2ba, a^2b(a^4)}
      - {a, a^2, a^4, aba, ab(a^2)} (8 descendants)
        
        {a, a^2, a^4, a^5, aba, ab(a^2)}
        
        {a, a^2, a^4, aba, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, aba, ab(a^2), ababa}
        
        {a, a^2, a^4, aba, ab(a^2), a^4ba}
        
        {a, a^2, a^4, aba, ab(a^2), ab(a^4)}
        
        {a, a^2, a^4, aba, ab(a^2), abab(a^2)}
        
        {a, a^2, a^4, a^7, aba, ab(a^2)}
        
        {a, a^2, a^4, aba, ab(a^2), a^4b(a^2)}
      - {a, a^2, a^4, a^5, aba} (6 descendants)
        
        {a, a^2, a^4, a^5, aba, a^2b(a^2)}
        
        {a, a^2, a^4, a^5, aba, ababa}
        
        {a, a^2, a^4, a^5, aba, a^4ba}
        
        {a, a^2, a^4, a^5, aba, ab(a^4)}
        
        {a, a^2, a^4, a^5, a^7, aba}
        
        {a, a^2, a^4, a^5, a^8, aba}
      - {a, a^2, a^4, aba, a^2b(a^2)} (4 descendants)
        
        {a, a^2, a^4, aba, a^2b(a^2), ababa}
        
        {a, a^2, a^4, aba, a^2b(a^2), a^4ba}
        
        {a, a^2, a^4, aba, ab(a^4), a^2b(a^2)}
        
        {a, a^2, a^4, a^7, aba, a^2b(a^2)}
      - {a, a^2, a^4, aba, ababa} (4 descendants)
        
        {a, a^2, a^4, aba, a^4ba, ababa}
        
        {a, a^2, a^4, aba, ab(a^4), ababa}
        
        {a, a^2, a^4, a^7, aba, ababa}
        
        {a, a^2, a^4, aba, ababa, abababa}
      - {a, a^2, a^4, aba, a^4ba} (2 descendants)
        
        {a, a^2, a^4, aba, ab(a^4), a^4ba}
        
        {a, a^2, a^4, a^7, aba, a^4ba}
      - {a, a^2, a^4, aba, ab(a^4)} (1 descendant)
        
        {a, a^2, a^4, a^7, aba, ab(a^4)}
      - {a, a^2, a^4, a^7, aba} (0 descendants)
    - {a, a^2, aba, a^2ba} (5 descendants)
      - {a, a^2, aba, ab(a^2), a^2ba} (7 descendants)
        
        {a, a^2, a^5, aba, ab(a^2), a^2ba}
        
        {a, a^2, aba, ab(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, aba, ab(a^2), a^2ba, ababa}
        
        {a, a^2, aba, ab(a^2), a^2ba, a^2baba}
        
        {a, a^2, aba, ab(a^2), a^2ba, ab(a^2)ba}
        
        {a, a^2, aba, ab(a^2), a^2ba, abab(a^2)}
        
        {a, a^2, aba, ab(a^2), a^2ba, a^2bab(a^2)}
      - {a, a^2, a^5, aba, a^2ba} (4 descendants)
        
        {a, a^2, a^5, aba, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^5, aba, a^2ba, ababa}
        
        {a, a^2, a^5, aba, a^2ba, a^2baba}
        
        {a, a^2, a^5, aba, a^2ba, a^5ba}
      - {a, a^2, aba, a^2ba, a^2b(a^2)} (4 descendants)
        
        {a, a^2, aba, a^2ba, a^2b(a^2), ababa}
        
        {a, a^2, aba, a^2ba, a^2b(a^2), a^2baba}
        
        {a, a^2, aba, a^2ba, a^2b(a^2), a^2b(a^2)ba}
        
        {a, a^2, aba, a^2ba, a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, aba, a^2ba, ababa} (2 descendants)
        
        {a, a^2, aba, a^2ba, ababa, a^2baba}
        
        {a, a^2, aba, a^2ba, ababa, abababa}
      - {a, a^2, aba, a^2ba, a^2baba} (0 descendants)
    - {a, a^2, aba, ab(a^2)} (4 descendants)
      - {a, a^2, a^5, aba, ab(a^2)} (4 descendants)
        
        {a, a^2, a^5, aba, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^5, aba, ab(a^2), ababa}
        
        {a, a^2, a^5, aba, ab(a^2), abab(a^2)}
        
        {a, a^2, a^5, aba, ab(a^2), ab(a^5)}
      - {a, a^2, aba, ab(a^2), a^2b(a^2)} (4 descendants)
        
        {a, a^2, aba, ab(a^2), a^2b(a^2), ababa}
        
        {a, a^2, aba, ab(a^2), a^2b(a^2), abab(a^2)}
        
        {a, a^2, aba, ab(a^2), a^2b(a^2), ab(a^2)b(a^2)}
        
        {a, a^2, aba, ab(a^2), a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, aba, ab(a^2), ababa} (2 descendants)
        
        {a, a^2, aba, ab(a^2), ababa, abab(a^2)}
        
        {a, a^2, aba, ab(a^2), ababa, abababa}
      - {a, a^2, aba, ab(a^2), abab(a^2)} (0 descendants)
    - {a, a^2, a^5, aba} (2 descendants)
      - {a, a^2, a^5, aba, a^2b(a^2)} (1 descendant)
        
        {a, a^2, a^5, aba, a^2b(a^2), ababa}
      - {a, a^2, a^5, aba, ababa} (1 descendant)
        
        {a, a^2, a^5, aba, ababa, abababa}
    - {a, a^2, aba, a^2b(a^2)} (1 descendant)
      - {a, a^2, aba, a^2b(a^2), ababa} (1 descendant)
        
        {a, a^2, aba, a^2b(a^2), ababa, abababa}
    - {a, a^2, aba, ababa} (1 descendant)
      - {a, a^2, aba, ababa, abababa} (1 descendant)
        
        {a, a^2, aba, ababa, abababa, ababababa}
  - {a, a^2, b(a^2)} (9 descendants)
    - {a, a^2, a^4, b(a^2)} (9 descendants)
      - {a, a^2, a^4, b(a^2), a^2ba} (9 descendants)
        
        {a, a^2, a^4, b(a^2), ab(a^2), a^2ba}
        
        {a, a^2, a^4, b(a^2), b^2(a^2), a^2ba}
        
        {a, a^2, a^4, a^5, b(a^2), a^2ba}
        
        {a, a^2, a^4, b(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, a^4, b(a^2), a(b^2)(a^2), a^2ba}
        
        {a, a^2, a^4, b(a^2), a^2ba, a^3b(a^2)}
        
        {a, a^2, a^4, b(a^2), a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, b(a^2), a^2ba}
        
        {a, a^2, a^4, b(a^2), a^2ba, a^2b(a^4)}
      - {a, a^2, a^4, b(a^2), ab(a^2)} (11 descendants)
        
        {a, a^2, a^4, b(a^2), b^2(a^2), ab(a^2)}
        
        {a, a^2, a^4, a^5, b(a^2), ab(a^2)}
        
        {a, a^2, a^4, b(a^2), ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, b(a^2), ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^4, b(a^2), ab(a^2), bab(a^2)}
        
        {a, a^2, a^4, b(a^2), ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^4, b(a^2), ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^4, b(a^2), ab(a^2), abab(a^2)}
        
        {a, a^2, a^4, a^7, b(a^2), ab(a^2)}
        
        {a, a^2, a^4, b(a^2), ab(a^2), a^4b(a^2)}
        
        {a, a^2, a^4, b(a^2), ab(a^2), a^2bab(a^2)}
      - {a, a^2, a^4, b(a^2), b^2(a^2)} (10 descendants)
        
        {a, a^2, a^4, a^5, b(a^2), b^2(a^2)}
        
        {a, a^2, a^4, b(a^2), b^2(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, b(a^2), b^2(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^4, b(a^2), b^2(a^2), b^3(a^2)}
        
        {a, a^2, a^4, b(a^2), b^2(a^2), a^3b(a^2)}
        
        {a, a^2, a^4, b(a^2), b^2(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^4, b(a^2), b^2(a^2), a(b^3)(a^2)}
        
        {a, a^2, a^4, a^7, b(a^2), b^2(a^2)}
        
        {a, a^2, a^4, b(a^2), b^2(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, a^4, b(a^2), b^2(a^2), a^2(b^3)(a^2)}
      - {a, a^2, a^4, a^5, b(a^2)} (7 descendants)
        
        {a, a^2, a^4, a^5, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, a^5, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^4, a^5, b(a^2), a^3b(a^2)}
        
        {a, a^2, a^4, a^5, b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^5, b(a^2), b(a^5)}
        
        {a, a^2, a^4, a^5, a^7, b(a^2)}
        
        {a, a^2, a^4, a^5, a^8, b(a^2)}
      - {a, a^2, a^4, b(a^2), a^2b(a^2)} (5 descendants)
        
        {a, a^2, a^4, b(a^2), a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, b(a^2), a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^4, b(a^2), a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, b(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, b(a^2), a^2b(a^2), a^5b(a^2)}
      - {a, a^2, a^4, b(a^2), a(b^2)(a^2)} (4 descendants)
        
        {a, a^2, a^4, b(a^2), a(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, a^4, b(a^2), a(b^2)(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^4, a^7, b(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^4, b(a^2), a(b^2)(a^2), a^4(b^2)(a^2)}
      - {a, a^2, a^4, b(a^2), a^3b(a^2)} (2 descendants)
        
        {a, a^2, a^4, b(a^2), a^2(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, a^4, a^7, b(a^2), a^3b(a^2)}
      - {a, a^2, a^4, b(a^2), a^2(b^2)(a^2)} (1 descendant)
        
        {a, a^2, a^4, a^7, b(a^2), a^2(b^2)(a^2)}
      - {a, a^2, a^4, a^7, b(a^2)} (0 descendants)
    - {a, a^2, b(a^2), a^2ba} (7 descendants)
      - {a, a^2, b(a^2), ab(a^2), a^2ba} (10 descendants)
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), a^2ba}
        
        {a, a^2, a^5, b(a^2), ab(a^2), a^2ba}
        
        {a, a^2, b(a^2), ab(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a(b^2)(a^2), a^2ba}
        
        {a, a^2, b(a^2), ab(a^2), a^2ba, bab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2ba, a^3b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2ba, abab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2ba, a^4b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2ba, a^2bab(a^2)}
      - {a, a^2, b(a^2), b^2(a^2), a^2ba} (9 descendants)
        
        {a, a^2, a^5, b(a^2), b^2(a^2), a^2ba}
        
        {a, a^2, b(a^2), b^2(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2), a^2ba}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), a^2ba}
        
        {a, a^2, b(a^2), b^2(a^2), a^2ba, a^3b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^3)(a^2), a^2ba}
        
        {a, a^2, b(a^2), b^2(a^2), a^2ba, a^3(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a^2ba, a^2(b^3)(a^2)}
      - {a, a^2, a^5, b(a^2), a^2ba} (4 descendants)
        
        {a, a^2, a^5, b(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, a^5, b(a^2), a(b^2)(a^2), a^2ba}
        
        {a, a^2, a^5, b(a^2), a^2ba, a^3b(a^2)}
        
        {a, a^2, a^5, b(a^2), a^2ba, a^2(b^2)(a^2)}
      - {a, a^2, b(a^2), a^2ba, a^2b(a^2)} (5 descendants)
        
        {a, a^2, b(a^2), a(b^2)(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, b(a^2), a^2ba, a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2ba, a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), a^2ba, a^2b(a^2), a^2b(a^2)ba}
        
        {a, a^2, b(a^2), a^2ba, a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, b(a^2), a(b^2)(a^2), a^2ba} (3 descendants)
        
        {a, a^2, b(a^2), a(b^2)(a^2), a^2ba, a^3b(a^2)}
        
        {a, a^2, b(a^2), a(b^2)(a^2), a^2ba, a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), a(b^2)(a^2), a^2ba, a^2ba(b^2)(a^2)}
      - {a, a^2, b(a^2), a^2ba, a^3b(a^2)} (1 descendant)
        
        {a, a^2, b(a^2), a^2ba, a^2(b^2)(a^2), a^3b(a^2)}
      - {a, a^2, b(a^2), a^2ba, a^2(b^2)(a^2)} (0 descendants)
    - {a, a^2, b(a^2), ab(a^2)} (10 descendants)
      - {a, a^2, b(a^2), b^2(a^2), ab(a^2)} (13 descendants)
        
        {a, a^2, a^5, b(a^2), b^2(a^2), ab(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), a^2b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), bab(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), ab(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), abab(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), a(b^3)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), a^4b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), a^2bab(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), ab(a^2), a^2(b^3)(a^2)}
      - {a, a^2, a^5, b(a^2), ab(a^2)} (8 descendants)
        
        {a, a^2, a^5, b(a^2), ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^5, b(a^2), ab(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^5, b(a^2), ab(a^2), bab(a^2)}
        
        {a, a^2, a^5, b(a^2), ab(a^2), a^3b(a^2)}
        
        {a, a^2, a^5, b(a^2), ab(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^5, b(a^2), ab(a^2), abab(a^2)}
        
        {a, a^2, a^5, b(a^2), ab(a^2), a^4b(a^2)}
        
        {a, a^2, a^5, b(a^2), ab(a^2), a^2bab(a^2)}
      - {a, a^2, b(a^2), ab(a^2), a^2b(a^2)} (11 descendants)
        
        {a, a^2, b(a^2), ab(a^2), a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2b(a^2), bab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2b(a^2), abab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2b(a^2), b(a^2)b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2b(a^2), a^4b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2b(a^2), a^2bab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2b(a^2), ab(a^2)b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2b(a^2), a^5b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, b(a^2), ab(a^2), a(b^2)(a^2)} (6 descendants)
        
        {a, a^2, b(a^2), ab(a^2), a(b^2)(a^2), bab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a(b^2)(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a(b^2)(a^2), abab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a(b^2)(a^2), a^4b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a(b^2)(a^2), a^2bab(a^2)}
      - {a, a^2, b(a^2), ab(a^2), bab(a^2)} (9 descendants)
        
        {a, a^2, b(a^2), ab(a^2), a^3b(a^2), bab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2(b^2)(a^2), bab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), bab(a^2), abab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), bab(a^2), b^2ab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^4b(a^2), bab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), bab(a^2), a^2bab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), bab(a^2), a(b^2)ab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), bab(a^2), a^3bab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), bab(a^2), a^2(b^2)ab(a^2)}
      - {a, a^2, b(a^2), ab(a^2), a^3b(a^2)} (4 descendants)
        
        {a, a^2, b(a^2), ab(a^2), a^2(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^3b(a^2), abab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^3b(a^2), a^4b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^3b(a^2), a^2bab(a^2)}
      - {a, a^2, b(a^2), ab(a^2), a^2(b^2)(a^2)} (3 descendants)
        
        {a, a^2, b(a^2), ab(a^2), a^2(b^2)(a^2), abab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2(b^2)(a^2), a^4b(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), a^2(b^2)(a^2), a^2bab(a^2)}
      - {a, a^2, b(a^2), ab(a^2), abab(a^2)} (2 descendants)
        
        {a, a^2, b(a^2), ab(a^2), a^4b(a^2), abab(a^2)}
        
        {a, a^2, b(a^2), ab(a^2), abab(a^2), a^2bab(a^2)}
      - {a, a^2, b(a^2), ab(a^2), a^4b(a^2)} (1 descendant)
        
        {a, a^2, b(a^2), ab(a^2), a^4b(a^2), a^2bab(a^2)}
      - {a, a^2, b(a^2), ab(a^2), a^2bab(a^2)} (0 descendants)
    - {a, a^2, b(a^2), b^2(a^2)} (9 descendants)
      - {a, a^2, a^5, b(a^2), b^2(a^2)} (8 descendants)
        
        {a, a^2, a^5, b(a^2), b^2(a^2), a^2b(a^2)}
        
        {a, a^2, a^5, b(a^2), b^2(a^2), a(b^2)(a^2)}
        
        {a, a^2, a^5, b(a^2), b^2(a^2), b^3(a^2)}
        
        {a, a^2, a^5, b(a^2), b^2(a^2), a^3b(a^2)}
        
        {a, a^2, a^5, b(a^2), b^2(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, a^5, b(a^2), b^2(a^2), a(b^3)(a^2)}
        
        {a, a^2, a^5, b(a^2), b^2(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, a^5, b(a^2), b^2(a^2), a^2(b^3)(a^2)}
      - {a, a^2, b(a^2), b^2(a^2), a^2b(a^2)} (7 descendants)
        
        {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), a^2b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a^2b(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^3)(a^2), a^2b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a^2b(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a^2b(a^2), a^2(b^3)(a^2)}
      - {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2)} (10 descendants)
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), a(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2), a(b^3)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2), ba(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2), a^2(b^3)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2), aba(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2), a^4(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^2)(a^2), a^2ba(b^2)(a^2)}
      - {a, a^2, b(a^2), b^2(a^2), b^3(a^2)} (9 descendants)
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), a(b^3)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), b^4(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), a^2(b^3)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), a(b^4)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), a^3(b^3)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), b^3(a^2), a^2(b^4)(a^2)}
      - {a, a^2, b(a^2), b^2(a^2), a^3b(a^2)} (4 descendants)
        
        {a, a^2, b(a^2), b^2(a^2), a^2(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^3)(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a^3b(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a^2(b^3)(a^2), a^3b(a^2)}
      - {a, a^2, b(a^2), b^2(a^2), a^2(b^2)(a^2)} (3 descendants)
        
        {a, a^2, b(a^2), b^2(a^2), a(b^3)(a^2), a^2(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a^2(b^2)(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a^2(b^2)(a^2), a^2(b^3)(a^2)}
      - {a, a^2, b(a^2), b^2(a^2), a(b^3)(a^2)} (2 descendants)
        
        {a, a^2, b(a^2), b^2(a^2), a(b^3)(a^2), a^3(b^2)(a^2)}
        
        {a, a^2, b(a^2), b^2(a^2), a(b^3)(a^2), a^2(b^3)(a^2)}
      - {a, a^2, b(a^2), b^2(a^2), a^3(b^2)(a^2)} (1 descendant)
        
        {a, a^2, b(a^2), b^2(a^2), a^2(b^3)(a^2), a^3(b^2)(a^2)}
      - {a, a^2, b(a^2), b^2(a^2), a^2(b^3)(a^2)} (0 descendants)
    - {a, a^2, a^5, b(a^2)} (4 descendants)
      - {a, a^2, a^5, b(a^2), a^2b(a^2)} (3 descendants)
        
        {a, a^2, a^5, b(a^2), a(b^2)(a^2), a^2b(a^2)}
        
        {a, a^2, a^5, b(a^2), a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, a^5, b(a^2), a^2b(a^2), a^2(b^2)(a^2)}
      - {a, a^2, a^5, b(a^2), a(b^2)(a^2)} (2 descendants)
        
        {a, a^2, a^5, b(a^2), a(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, a^5, b(a^2), a(b^2)(a^2), a^2(b^2)(a^2)}
      - {a, a^2, a^5, b(a^2), a^3b(a^2)} (1 descendant)
        
        {a, a^2, a^5, b(a^2), a^2(b^2)(a^2), a^3b(a^2)}
      - {a, a^2, a^5, b(a^2), a^2(b^2)(a^2)} (0 descendants)
    - {a, a^2, b(a^2), a^2b(a^2)} (3 descendants)
      - {a, a^2, b(a^2), a(b^2)(a^2), a^2b(a^2)} (2 descendants)
        
        {a, a^2, b(a^2), a(b^2)(a^2), a^2b(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), a(b^2)(a^2), a^2b(a^2), a^2(b^2)(a^2)}
      - {a, a^2, b(a^2), a^2b(a^2), a^3b(a^2)} (3 descendants)
        
        {a, a^2, b(a^2), a^2b(a^2), a^2(b^2)(a^2), a^3b(a^2)}
        
        {a, a^2, b(a^2), a^2b(a^2), a^3b(a^2), b(a^3)b(a^2)}
        
        {a, a^2, b(a^2), a^2b(a^2), a^3b(a^2), a^2b(a^3)b(a^2)}
      - {a, a^2, b(a^2), a^2b(a^2), a^2(b^2)(a^2)} (0 descendants)
    - {a, a^2, b(a^2), a(b^2)(a^2)} (2 descendants)
      - {a, a^2, b(a^2), a(b^2)(a^2), a^3b(a^2)} (1 descendant)
        
        {a, a^2, b(a^2), a(b^2)(a^2), a^2(b^2)(a^2), a^3b(a^2)}
      - {a, a^2, b(a^2), a(b^2)(a^2), a^2(b^2)(a^2)} (1 descendant)
        
        {a, a^2, b(a^2), a(b^2)(a^2), a^2(b^2)(a^2), b(a^2)(b^2)(a^2)}
    - {a, a^2, b(a^2), a^3b(a^2)} (1 descendant)
      - {a, a^2, b(a^2), a^2(b^2)(a^2), a^3b(a^2)} (0 descendants)
    - {a, a^2, b(a^2), a^2(b^2)(a^2)} (0 descendants)
  - {a, a^2, a^4} (5 descendants)
    - {a, a^2, a^4, a^2ba} (5 descendants)
      - {a, a^2, a^4, ab(a^2), a^2ba} (6 descendants)
        
        {a, a^2, a^4, a^5, ab(a^2), a^2ba}
        
        {a, a^2, a^4, ab(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, a^4, a^7, ab(a^2), a^2ba}
        
        {a, a^2, a^4, ab(a^2), a^2ba, a^4b(a^2)}
        
        {a, a^2, a^4, ab(a^2), a^2ba, a^2b(a^4)}
        
        {a, a^2, a^4, ab(a^2), a^2ba, a^2bab(a^2)}
      - {a, a^2, a^4, a^5, a^2ba} (5 descendants)
        
        {a, a^2, a^4, a^5, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^4, a^5, a^7, a^2ba}
        
        {a, a^2, a^4, a^5, a^2ba, a^5ba}
        
        {a, a^2, a^4, a^5, a^2ba, a^2b(a^4)}
        
        {a, a^2, a^4, a^5, a^8, a^2ba}
      - {a, a^2, a^4, a^2ba, a^2b(a^2)} (4 descendants)
        
        {a, a^2, a^4, a^7, a^2ba, a^2b(a^2)}
        
        {a, a^2, a^4, a^2ba, a^2b(a^2), a^2b(a^4)}
        
        {a, a^2, a^4, a^2ba, a^2b(a^2), a^2b(a^2)ba}
        
        {a, a^2, a^4, a^2ba, a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, a^4, a^7, a^2ba} (1 descendant)
        
        {a, a^2, a^4, a^7, a^2ba, a^2b(a^4)}
      - {a, a^2, a^4, a^2ba, a^2b(a^4)} (0 descendants)
    - {a, a^2, a^4, ab(a^2)} (4 descendants)
      - {a, a^2, a^4, a^5, ab(a^2)} (5 descendants)
        
        {a, a^2, a^4, a^5, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, a^5, a^7, ab(a^2)}
        
        {a, a^2, a^4, a^5, ab(a^2), a^4b(a^2)}
        
        {a, a^2, a^4, a^5, ab(a^2), ab(a^5)}
        
        {a, a^2, a^4, a^5, a^8, ab(a^2)}
      - {a, a^2, a^4, ab(a^2), a^2b(a^2)} (4 descendants)
        
        {a, a^2, a^4, a^7, ab(a^2), a^2b(a^2)}
        
        {a, a^2, a^4, ab(a^2), a^2b(a^2), a^4b(a^2)}
        
        {a, a^2, a^4, ab(a^2), a^2b(a^2), ab(a^2)b(a^2)}
        
        {a, a^2, a^4, ab(a^2), a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, a^4, a^7, ab(a^2)} (1 descendant)
        
        {a, a^2, a^4, a^7, ab(a^2), a^4b(a^2)}
      - {a, a^2, a^4, ab(a^2), a^4b(a^2)} (0 descendants)
    - {a, a^2, a^4, a^5} (3 descendants)
      - {a, a^2, a^4, a^5, a^2b(a^2)} (4 descendants)
        
        {a, a^2, a^4, a^5, a^7, a^2b(a^2)}
        
        {a, a^2, a^4, a^5, a^8, a^2b(a^2)}
        
        {a, a^2, a^4, a^5, a^2b(a^2), a^5b(a^2)}
        
        {a, a^2, a^4, a^5, a^2b(a^2), a^2b(a^5)}
      - {a, a^2, a^4, a^5, a^7} (2 descendants)
        
        {a, a^2, a^4, a^5, a^7, a^8}
        
        {a, a^2, a^4, a^5, a^7, a^10}
      - {a, a^2, a^4, a^5, a^8} (1 descendant)
        
        {a, a^2, a^4, a^5, a^8, a^11}
    - {a, a^2, a^4, a^2b(a^2)} (1 descendant)
      - {a, a^2, a^4, a^7, a^2b(a^2)} (0 descendants)
    - {a, a^2, a^4, a^7} (0 descendants)
  - {a, a^2, a^2ba} (3 descendants)
    - {a, a^2, ab(a^2), a^2ba} (3 descendants)
      - {a, a^2, a^5, ab(a^2), a^2ba} (2 descendants)
        
        {a, a^2, a^5, ab(a^2), a^2ba, a^2b(a^2)}
        
        {a, a^2, a^5, ab(a^2), a^2ba, a^2bab(a^2)}
      - {a, a^2, ab(a^2), a^2ba, a^2b(a^2)} (4 descendants)
        
        {a, a^2, ab(a^2), a^2ba, a^2b(a^2), a^2b(a^2)ba}
        
        {a, a^2, ab(a^2), a^2ba, a^2b(a^2), a^2bab(a^2)}
        
        {a, a^2, ab(a^2), a^2ba, a^2b(a^2), ab(a^2)b(a^2)}
        
        {a, a^2, ab(a^2), a^2ba, a^2b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, ab(a^2), a^2ba, a^2bab(a^2)} (0 descendants)
    - {a, a^2, a^5, a^2ba} (1 descendant)
      - {a, a^2, a^5, a^2ba, a^2b(a^2)} (3 descendants)
        
        {a, a^2, a^5, a^2ba, a^2b(a^2), a^2b(a^2)ba}
        
        {a, a^2, a^5, a^2ba, a^2b(a^2), a^2b(a^5)}
        
        {a, a^2, a^5, a^2ba, a^2b(a^2), a^2b(a^2)b(a^2)}
    - {a, a^2, a^2ba, a^2b(a^2)} (2 descendants)
      - {a, a^2, a^2ba, a^2b(a^2), a^2b(a^2)ba} (1 descendant)
        
        {a, a^2, a^2ba, a^2b(a^2), a^2b(a^2)ba, a^2b(a^2)b(a^2)}
      - {a, a^2, a^2ba, a^2b(a^2), a^2b(a^2)b(a^2)} (0 descendants)
  - {a, a^2, ab(a^2)} (2 descendants)
    - {a, a^2, a^5, ab(a^2)} (1 descendant)
      - {a, a^2, a^5, ab(a^2), a^2b(a^2)} (3 descendants)
        
        {a, a^2, a^5, ab(a^2), a^2b(a^2), ab(a^2)b(a^2)}
        
        {a, a^2, a^5, ab(a^2), a^2b(a^2), a^5b(a^2)}
        
        {a, a^2, a^5, ab(a^2), a^2b(a^2), a^2b(a^2)b(a^2)}
    - {a, a^2, ab(a^2), a^2b(a^2)} (2 descendants)
      - {a, a^2, ab(a^2), a^2b(a^2), ab(a^2)b(a^2)} (1 descendant)
        
        {a, a^2, ab(a^2), a^2b(a^2), ab(a^2)b(a^2), a^2b(a^2)b(a^2)}
      - {a, a^2, ab(a^2), a^2b(a^2), a^2b(a^2)b(a^2)} (0 descendants)
  - {a, a^2, a^5} (1 descendant)
    - {a, a^2, a^5, a^2b(a^2)} (0 descendants)
  - {a, a^2, a^2b(a^2)} (0 descendants)
- {a, ab} (6 descendants)
  - {a, ab, ba} (10 descendants)
    - {a, a^3, ab, ba} (12 descendants)
      - {a, a^3, ab, ba, aba} (20 descendants)
        
        {a, a^3, ab, a(b^2), ba, aba}
        
        {a, a^3, ab, ba, aba, bab}
        
        {a, a^3, ab, ba, b^2a, aba}
        
        {a, a^3, ab, ba, a^3b, aba}
        
        {a, a^3, ab, ba, aba, a^2ba}
        
        {a, a^3, ab, ba, aba, ab(a^2)}
        
        {a, a^3, ab, ba, aba, abab}
        
        {a, a^3, ab, ba, aba, a(b^2)a}
        
        {a, a^3, ab, ba, b(a^3), aba}
        
        {a, a^3, ab, ba, aba, baba}
        
        {a, a^3, a^5, ab, ba, aba}
        
        {a, a^3, ab, ba, aba, a^3ba}
        
        {a, a^3, ab, ba, aba, ab(a^3)}
        
        {a, a^3, ab, ba, aba, ababa}
        
        {a, a^3, ab, ba, aba, a(b^3)a}
        
        {a, a^3, ab, ba, aba, ab(a^2)ba}
        
        {a, a^3, ab, ba, aba, aba(b^2)a}
        
        {a, a^3, ab, ba, aba, a(b^2)aba}
        
        {a, a^3, ab, ba, aba, ab(a^3)ba}
        
        {a, a^3, ab, ba, aba, abababa}
      - {a, a^3, ab, a(b^2), ba} (14 descendants)
        
        {a, a^3, ab, a(b^2), ba, bab}
        
        {a, a^3, ab, a(b^2), ba, b^2a}
        
        {a, a^3, ab, a(b^2), ba, a^3b}
        
        {a, a^3, ab, a(b^2), ba, a^2ba}
        
        {a, a^3, ab, a(b^2), ba, ab(a^2)}
        
        {a, a^3, ab, a(b^2), ba, a(b^2)a}
        
        {a, a^3, ab, a(b^2), a(b^3), ba}
        
        {a, a^3, ab, a(b^2), ba, b(a^3)}
        
        {a, a^3, a^5, ab, a(b^2), ba}
        
        {a, a^3, ab, a(b^2), ba, ababa}
        
        {a, a^3, ab, a(b^2), ba, a(b^2)(a^2)}
        
        {a, a^3, ab, a(b^2), ba, a(b^3)a}
        
        {a, a^3, ab, a(b^2), ba, a(b^2)aba}
        
        {a, a^3, ab, a(b^2), ba, a(b^4)a}
      - {a, a^3, ab, ba, bab} (9 descendants)
        
        {a, a^3, ab, ba, b^2a, bab}
        
        {a, a^3, ab, ba, a^3b, bab}
        
        {a, a^3, ab, ba, bab, a^2ba}
        
        {a, a^3, ab, ba, ab(a^2), bab}
        
        {a, a^3, ab, ba, a(b^2)a, bab}
        
        {a, a^3, ab, ba, b(a^3), bab}
        
        {a, a^3, a^5, ab, ba, bab}
        
        {a, a^3, ab, ba, bab, ababa}
        
        {a, a^3, ab, ba, a(b^3)a, bab}
      - {a, a^3, ab, ba, b^2a} (12 descendants)
        
        {a, a^3, ab, ba, a^3b, b^2a}
        
        {a, a^3, ab, ba, b^2a, a^2ba}
        
        {a, a^3, ab, ba, b^2a, ab(a^2)}
        
        {a, a^3, ab, ba, b^2a, a(b^2)a}
        
        {a, a^3, ab, ba, b(a^3), b^2a}
        
        {a, a^3, ab, ba, b^2a, b^3a}
        
        {a, a^3, a^5, ab, ba, b^2a}
        
        {a, a^3, ab, ba, b^2a, a^2(b^2)a}
        
        {a, a^3, ab, ba, b^2a, ababa}
        
        {a, a^3, ab, ba, b^2a, a(b^3)a}
        
        {a, a^3, ab, ba, b^2a, aba(b^2)a}
        
        {a, a^3, ab, ba, b^2a, a(b^4)a}
      - {a, a^3, ab, ba, a^3b} (7 descendants)
        
        {a, a^3, ab, ba, a^3b, a^2ba}
        
        {a, a^3, ab, ba, a^3b, ab(a^2)}
        
        {a, a^3, ab, ba, a^3b, a(b^2)a}
        
        {a, a^3, ab, ba, b(a^3), a^3b}
        
        {a, a^3, a^5, ab, ba, a^3b}
        
        {a, a^3, ab, ba, a^3b, ababa}
        
        {a, a^3, ab, ba, a^3b, a(b^3)a}
      - {a, a^3, ab, ba, a^2ba} (8 descendants)
        
        {a, a^3, ab, ba, ab(a^2), a^2ba}
        
        {a, a^3, ab, ba, a(b^2)a, a^2ba}
        
        {a, a^3, ab, ba, b(a^3), a^2ba}
        
        {a, a^3, a^5, ab, ba, a^2ba}
        
        {a, a^3, ab, ba, a^2ba, ababa}
        
        {a, a^3, ab, ba, a(b^3)a, a^2ba}
        
        {a, a^3, ab, ba, a^2ba, b(a^2)ba}
        
        {a, a^3, ab, ba, a^2ba, a^4ba}
      - {a, a^3, ab, ba, ab(a^2)} (7 descendants)
        
        {a, a^3, ab, ba, ab(a^2), a(b^2)a}
        
        {a, a^3, ab, ba, b(a^3), ab(a^2)}
        
        {a, a^3, a^5, ab, ba, ab(a^2)}
        
        {a, a^3, ab, ba, ab(a^2), ab(a^2)b}
        
        {a, a^3, ab, ba, ab(a^2), ababa}
        
        {a, a^3, ab, ba, ab(a^2), a(b^3)a}
        
        {a, a^3, ab, ba, ab(a^2), ab(a^4)}
      - {a, a^3, ab, ba, a(b^2)a} (9 descendants)
        
        {a, a^3, ab, ba, b(a^3), a(b^2)a}
        
        {a, a^3, a^5, ab, ba, a(b^2)a}
        
        {a, a^3, ab, ba, a(b^2)a, ababa}
        
        {a, a^3, ab, ba, a(b^2)a, a(b^2)ab}
        
        {a, a^3, ab, ba, a(b^2)a, a(b^3)a}
        
        {a, a^3, ab, ba, a(b^2)a, ba(b^2)a}
        
        {a, a^3, ab, ba, a(b^2)a, a^3(b^2)a}
        
        {a, a^3, ab, ba, a(b^2)a, a(b^2)(a^3)}
        
        {a, a^3, ab, ba, a(b^2)a, a(b^2)a(b^2)a}
      - {a, a^3, ab, ba, b(a^3)} (3 descendants)
        
        {a, a^3, a^5, ab, ba, b(a^3)}
        
        {a, a^3, ab, ba, b(a^3), ababa}
        
        {a, a^3, ab, ba, b(a^3), a(b^3)a}
      - {a, a^3, a^5, ab, ba} (3 descendants)
        
        {a, a^3, a^5, ab, ba, ababa}
        
        {a, a^3, a^5, ab, ba, a(b^3)a}
        
        {a, a^3, a^5, a^7, ab, ba}
      - {a, a^3, ab, ba, ababa} (1 descendant)
        
        {a, a^3, ab, ba, a(b^3)a, ababa}
      - {a, a^3, ab, ba, a(b^3)a} (0 descendants)
    - {a, ab, ba, aba} (17 descendants)
      - {a, ab, a(b^2), ba, aba} (21 descendants)
        
        {a, ab, a(b^2), ba, aba, bab}
        
        {a, ab, a(b^2), ba, b^2a, aba}
        
        {a, ab, a(b^2), ba, aba, a^2ba}
        
        {a, ab, a(b^2), ba, aba, ab(a^2)}
        
        {a, ab, a(b^2), ba, aba, abab}
        
        {a, ab, a(b^2), ba, aba, a(b^2)a}
        
        {a, ab, a(b^2), a(b^3), ba, aba}
        
        {a, ab, a(b^2), ba, aba, baba}
        
        {a, ab, a(b^2), ba, aba, a^3ba}
        
        {a, ab, a(b^2), ba, aba, ab(a^3)}
        
        {a, ab, a(b^2), ba, aba, ababa}
        
        {a, ab, a(b^2), ba, aba, a(b^2)(a^2)}
        
        {a, ab, a(b^2), ba, aba, a(b^3)a}
        
        {a, ab, a(b^2), ba, aba, ab(a^2)ba}
        
        {a, ab, a(b^2), ba, aba, aba(b^2)a}
        
        {a, ab, a(b^2), ba, aba, a(b^2)aba}
        
        {a, ab, a(b^2), ba, aba, a(b^4)a}
        
        {a, ab, a(b^2), ba, aba, ab(a^3)ba}
        
        {a, ab, a(b^2), ba, aba, abababa}
        
        {a, ab, a(b^2), ba, aba, a(b^2)(a^2)ba}
        
        {a, ab, a(b^2), ba, aba, a(b^3)aba}
      - {a, ab, ba, aba, bab} (15 descendants)
        
        {a, ab, ba, b^2a, aba, bab}
        
        {a, ab, ba, aba, bab, a^2ba}
        
        {a, ab, ba, aba, ab(a^2), bab}
        
        {a, ab, ba, aba, bab, abab}
        
        {a, ab, ba, aba, a(b^2)a, bab}
        
        {a, ab, ba, aba, bab, baba}
        
        {a, ab, ba, aba, bab, a^3ba}
        
        {a, ab, ba, aba, ab(a^3), bab}
        
        {a, ab, ba, aba, bab, ababa}
        
        {a, ab, ba, aba, a(b^3)a, bab}
        
        {a, ab, ba, aba, bab, ab(a^2)ba}
        
        {a, ab, ba, aba, bab, aba(b^2)a}
        
        {a, ab, ba, aba, bab, a(b^2)aba}
        
        {a, ab, ba, aba, bab, ab(a^3)ba}
        
        {a, ab, ba, aba, bab, abababa}
      - {a, ab, ba, b^2a, aba} (19 descendants)
        
        {a, ab, ba, b^2a, aba, a^2ba}
        
        {a, ab, ba, b^2a, aba, ab(a^2)}
        
        {a, ab, ba, b^2a, aba, abab}
        
        {a, ab, ba, b^2a, aba, a(b^2)a}
        
        {a, ab, ba, b^2a, aba, baba}
        
        {a, ab, ba, b^2a, b^3a, aba}
        
        {a, ab, ba, b^2a, aba, a^3ba}
        
        {a, ab, ba, b^2a, aba, a^2(b^2)a}
        
        {a, ab, ba, b^2a, aba, ab(a^3)}
        
        {a, ab, ba, b^2a, aba, ababa}
        
        {a, ab, ba, b^2a, aba, a(b^3)a}
        
        {a, ab, ba, b^2a, aba, ab(a^2)ba}
        
        {a, ab, ba, b^2a, aba, aba(b^2)a}
        
        {a, ab, ba, b^2a, aba, a(b^2)aba}
        
        {a, ab, ba, b^2a, aba, a(b^4)a}
        
        {a, ab, ba, b^2a, aba, ab(a^3)ba}
        
        {a, ab, ba, b^2a, aba, ab(a^2)(b^2)a}
        
        {a, ab, ba, b^2a, aba, abababa}
        
        {a, ab, ba, b^2a, aba, aba(b^3)a}
      - {a, ab, ba, aba, a^2ba} (18 descendants)
        
        {a, ab, ba, aba, ab(a^2), a^2ba}
        
        {a, ab, ba, aba, a^2ba, abab}
        
        {a, ab, ba, aba, a(b^2)a, a^2ba}
        
        {a, ab, ba, aba, a^2ba, baba}
        
        {a, ab, ba, aba, a^2ba, a^3ba}
        
        {a, ab, ba, aba, ab(a^3), a^2ba}
        
        {a, ab, ba, aba, a^2ba, ababa}
        
        {a, ab, ba, aba, a(b^3)a, a^2ba}
        
        {a, ab, ba, aba, a^2ba, b(a^2)ba}
        
        {a, ab, ba, aba, a^2ba, a^4ba}
        
        {a, ab, ba, aba, a^2ba, ab(a^2)ba}
        
        {a, ab, ba, aba, a^2ba, aba(b^2)a}
        
        {a, ab, ba, aba, a^2ba, a(b^2)aba}
        
        {a, ab, ba, aba, a^2ba, ab(a^3)ba}
        
        {a, ab, ba, aba, a^2ba, abababa}
        
        {a, ab, ba, aba, a^2ba, a(b^2)(a^2)ba}
        
        {a, ab, ba, aba, a^2ba, ab(a^4)ba}
        
        {a, ab, ba, aba, a^2ba, abab(a^2)ba}
      - {a, ab, ba, aba, ab(a^2)} (17 descendants)
        
        {a, ab, ba, aba, ab(a^2), abab}
        
        {a, ab, ba, aba, ab(a^2), a(b^2)a}
        
        {a, ab, ba, aba, ab(a^2), baba}
        
        {a, ab, ba, aba, ab(a^2), a^3ba}
        
        {a, ab, ba, aba, ab(a^2), ab(a^3)}
        
        {a, ab, ba, aba, ab(a^2), ab(a^2)b}
        
        {a, ab, ba, aba, ab(a^2), ababa}
        
        {a, ab, ba, aba, ab(a^2), a(b^3)a}
        
        {a, ab, ba, aba, ab(a^2), ab(a^4)}
        
        {a, ab, ba, aba, ab(a^2), ab(a^2)ba}
        
        {a, ab, ba, aba, ab(a^2), aba(b^2)a}
        
        {a, ab, ba, aba, ab(a^2), a(b^2)aba}
        
        {a, ab, ba, aba, ab(a^2), ab(a^3)ba}
        
        {a, ab, ba, aba, ab(a^2), ab(a^2)(b^2)a}
        
        {a, ab, ba, aba, ab(a^2), abababa}
        
        {a, ab, ba, aba, ab(a^2), ab(a^4)ba}
        
        {a, ab, ba, aba, ab(a^2), ab(a^2)baba}
      - {a, ab, ba, aba, abab} (16 descendants)
        
        {a, ab, ba, aba, a(b^2)a, abab}
        
        {a, ab, ba, aba, abab, baba}
        
        {a, ab, ba, aba, a^3ba, abab}
        
        {a, ab, ba, aba, ab(a^3), abab}
        
        {a, ab, ba, aba, abab, ababa}
        
        {a, ab, ba, aba, abab, aba(b^2)}
        
        {a, ab, ba, aba, a(b^3)a, abab}
        
        {a, ab, ba, aba, abab, ab(a^2)ba}
        
        {a, ab, ba, aba, abab, abab(a^2)}
        
        {a, ab, ba, aba, abab, aba(b^2)a}
        
        {a, ab, ba, aba, abab, a(b^2)aba}
        
        {a, ab, ba, aba, abab, ab(a^3)ba}
        
        {a, ab, ba, aba, abab, abababa}
        
        {a, ab, ba, aba, abab, aba(b^3)a}
        
        {a, ab, ba, aba, abab, abab(a^2)ba}
        
        {a, ab, ba, aba, abab, aba(b^2)aba}
      - {a, ab, ba, aba, a(b^2)a} (13 descendants)
        
        {a, ab, ba, aba, a(b^2)a, baba}
        
        {a, ab, ba, aba, a(b^2)a, a^3ba}
        
        {a, ab, ba, aba, ab(a^3), a(b^2)a}
        
        {a, ab, ba, aba, a(b^2)a, ababa}
        
        {a, ab, ba, aba, a(b^2)a, a(b^2)ab}
        
        {a, ab, ba, aba, a(b^2)a, a(b^3)a}
        
        {a, ab, ba, aba, a(b^2)a, ba(b^2)a}
        
        {a, ab, ba, aba, a(b^2)a, ab(a^2)ba}
        
        {a, ab, ba, aba, a(b^2)a, aba(b^2)a}
        
        {a, ab, ba, aba, a(b^2)a, a(b^2)aba}
        
        {a, ab, ba, aba, a(b^2)a, ab(a^3)ba}
        
        {a, ab, ba, aba, a(b^2)a, abababa}
        
        {a, ab, ba, aba, a(b^2)a, a(b^2)a(b^2)a}
      - {a, ab, ba, aba, baba} (14 descendants)
        
        {a, ab, ba, aba, a^3ba, baba}
        
        {a, ab, ba, aba, ab(a^3), baba}
        
        {a, ab, ba, aba, baba, ababa}
        
        {a, ab, ba, aba, a(b^3)a, baba}
        
        {a, ab, ba, aba, baba, b^2aba}
        
        {a, ab, ba, aba, baba, a^2baba}
        
        {a, ab, ba, aba, baba, ab(a^2)ba}
        
        {a, ab, ba, aba, baba, aba(b^2)a}
        
        {a, ab, ba, aba, baba, a(b^2)aba}
        
        {a, ab, ba, aba, baba, ab(a^3)ba}
        
        {a, ab, ba, aba, baba, abababa}
        
        {a, ab, ba, aba, baba, a(b^3)aba}
        
        {a, ab, ba, aba, baba, ab(a^2)baba}
        
        {a, ab, ba, aba, baba, aba(b^2)aba}
      - {a, ab, ba, aba, a^3ba} (9 descendants)
        
        {a, ab, ba, aba, ab(a^3), a^3ba}
        
        {a, ab, ba, aba, a^3ba, ababa}
        
        {a, ab, ba, aba, a(b^3)a, a^3ba}
        
        {a, ab, ba, aba, a^3ba, ab(a^2)ba}
        
        {a, ab, ba, aba, a^3ba, aba(b^2)a}
        
        {a, ab, ba, aba, a^3ba, a(b^2)aba}
        
        {a, ab, ba, aba, a^3ba, b(a^3)ba}
        
        {a, ab, ba, aba, a^3ba, ab(a^3)ba}
        
        {a, ab, ba, aba, a^3ba, abababa}
      - {a, ab, ba, aba, ab(a^3)} (8 descendants)
        
        {a, ab, ba, aba, ab(a^3), ababa}
        
        {a, ab, ba, aba, ab(a^3), a(b^3)a}
        
        {a, ab, ba, aba, ab(a^3), ab(a^3)b}
        
        {a, ab, ba, aba, ab(a^3), ab(a^2)ba}
        
        {a, ab, ba, aba, ab(a^3), aba(b^2)a}
        
        {a, ab, ba, aba, ab(a^3), a(b^2)aba}
        
        {a, ab, ba, aba, ab(a^3), ab(a^3)ba}
        
        {a, ab, ba, aba, ab(a^3), abababa}
      - {a, ab, ba, aba, ababa} (9 descendants)
        
        {a, ab, ba, aba, a(b^3)a, ababa}
        
        {a, ab, ba, aba, ababa, ab(a^2)ba}
        
        {a, ab, ba, aba, ababa, ababab}
        
        {a, ab, ba, aba, ababa, aba(b^2)a}
        
        {a, ab, ba, aba, ababa, a(b^2)aba}
        
        {a, ab, ba, aba, ababa, bababa}
        
        {a, ab, ba, aba, ababa, ab(a^3)ba}
        
        {a, ab, ba, aba, ababa, abababa}
        
        {a, ab, ba, aba, ababa, ababababa}
      - {a, ab, ba, aba, a(b^3)a} (5 descendants)
        
        {a, ab, ba, aba, a(b^3)a, ab(a^2)ba}
        
        {a, ab, ba, aba, a(b^3)a, aba(b^2)a}
        
        {a, ab, ba, aba, a(b^3)a, a(b^2)aba}
        
        {a, ab, ba, aba, a(b^3)a, ab(a^3)ba}
        
        {a, ab, ba, aba, a(b^3)a, abababa}
      - {a, ab, ba, aba, ab(a^2)ba} (4 descendants)
        
        {a, ab, ba, aba, aba(b^2)a, ab(a^2)ba}
        
        {a, ab, ba, aba, ab(a^2)ba, a(b^2)aba}
        
        {a, ab, ba, aba, ab(a^2)ba, ab(a^3)ba}
        
        {a, ab, ba, aba, ab(a^2)ba, abababa}
      - {a, ab, ba, aba, aba(b^2)a} (3 descendants)
        
        {a, ab, ba, aba, aba(b^2)a, a(b^2)aba}
        
        {a, ab, ba, aba, aba(b^2)a, ab(a^3)ba}
        
        {a, ab, ba, aba, aba(b^2)a, abababa}
      - {a, ab, ba, aba, a(b^2)aba} (2 descendants)
        
        {a, ab, ba, aba, ab(a^3)ba, a(b^2)aba}
        
        {a, ab, ba, aba, a(b^2)aba, abababa}
      - {a, ab, ba, aba, ab(a^3)ba} (1 descendant)
        
        {a, ab, ba, aba, ab(a^3)ba, abababa}
      - {a, ab, ba, aba, abababa} (0 descendants)
    - {a, ab, a(b^2), ba} (11 descendants)
      - {a, ab, a(b^2), ba, bab} (11 descendants)
        
        {a, ab, a(b^2), ba, b^2a, bab}
        
        {a, ab, a(b^2), ba, bab, a^2ba}
        
        {a, ab, a(b^2), ba, ab(a^2), bab}
        
        {a, ab, a(b^2), ba, a(b^2)a, bab}
        
        {a, ab, a(b^2), a(b^3), ba, bab}
        
        {a, ab, a(b^2), ba, bab, ba(b^2)}
        
        {a, ab, a(b^2), ba, bab, ababa}
        
        {a, ab, a(b^2), ba, a(b^2)(a^2), bab}
        
        {a, ab, a(b^2), ba, a(b^3)a, bab}
        
        {a, ab, a(b^2), ba, bab, a(b^2)aba}
        
        {a, ab, a(b^2), ba, a(b^4)a, bab}
      - {a, ab, a(b^2), ba, b^2a} (14 descendants)
        
        {a, ab, a(b^2), ba, b^2a, a^2ba}
        
        {a, ab, a(b^2), ba, b^2a, ab(a^2)}
        
        {a, ab, a(b^2), ba, b^2a, a(b^2)a}
        
        {a, ab, a(b^2), a(b^3), ba, b^2a}
        
        {a, ab, a(b^2), ba, b^2a, b^3a}
        
        {a, ab, a(b^2), ba, b^2a, a^2(b^2)a}
        
        {a, ab, a(b^2), ba, b^2a, ababa}
        
        {a, ab, a(b^2), ba, b^2a, a(b^2)(a^2)}
        
        {a, ab, a(b^2), ba, b^2a, a(b^3)a}
        
        {a, ab, a(b^2), ba, b^2a, aba(b^2)a}
        
        {a, ab, a(b^2), ba, b^2a, a(b^2)aba}
        
        {a, ab, a(b^2), ba, b^2a, a(b^4)a}
        
        {a, ab, a(b^2), ba, b^2a, a(b^2)a(b^2)a}
        
        {a, ab, a(b^2), ba, b^2a, a(b^5)a}
      - {a, ab, a(b^2), ba, a^2ba} (9 descendants)
        
        {a, ab, a(b^2), ba, ab(a^2), a^2ba}
        
        {a, ab, a(b^2), ba, a(b^2)a, a^2ba}
        
        {a, ab, a(b^2), a(b^3), ba, a^2ba}
        
        {a, ab, a(b^2), ba, a^2ba, ababa}
        
        {a, ab, a(b^2), ba, a(b^2)(a^2), a^2ba}
        
        {a, ab, a(b^2), ba, a(b^3)a, a^2ba}
        
        {a, ab, a(b^2), ba, a^2ba, b(a^2)ba}
        
        {a, ab, a(b^2), ba, a^2ba, a(b^2)aba}
        
        {a, ab, a(b^2), ba, a(b^4)a, a^2ba}
      - {a, ab, a(b^2), ba, ab(a^2)} (8 descendants)
        
        {a, ab, a(b^2), ba, ab(a^2), a(b^2)a}
        
        {a, ab, a(b^2), a(b^3), ba, ab(a^2)}
        
        {a, ab, a(b^2), ba, ab(a^2), ab(a^2)b}
        
        {a, ab, a(b^2), ba, ab(a^2), ababa}
        
        {a, ab, a(b^2), ba, ab(a^2), a(b^2)(a^2)}
        
        {a, ab, a(b^2), ba, ab(a^2), a(b^3)a}
        
        {a, ab, a(b^2), ba, ab(a^2), a(b^2)aba}
        
        {a, ab, a(b^2), ba, ab(a^2), a(b^4)a}
      - {a, ab, a(b^2), ba, a(b^2)a} (11 descendants)
        
        {a, ab, a(b^2), a(b^3), ba, a(b^2)a}
        
        {a, ab, a(b^2), ba, a(b^2)a, ababa}
        
        {a, ab, a(b^2), ba, a(b^2)a, a(b^2)(a^2)}
        
        {a, ab, a(b^2), ba, a(b^2)a, a(b^2)ab}
        
        {a, ab, a(b^2), ba, a(b^2)a, a(b^3)a}
        
        {a, ab, a(b^2), ba, a(b^2)a, ba(b^2)a}
        
        {a, ab, a(b^2), ba, a(b^2)a, a(b^2)(a^3)}
        
        {a, ab, a(b^2), ba, a(b^2)a, a(b^2)aba}
        
        {a, ab, a(b^2), ba, a(b^2)a, a(b^4)a}
        
        {a, ab, a(b^2), ba, a(b^2)a, a(b^2)(a^2)ba}
        
        {a, ab, a(b^2), ba, a(b^2)a, a(b^2)a(b^2)a}
      - {a, ab, a(b^2), a(b^3), ba} (9 descendants)
        
        {a, ab, a(b^2), a(b^3), ba, ababa}
        
        {a, ab, a(b^2), a(b^3), ba, a(b^2)(a^2)}
        
        {a, ab, a(b^2), a(b^3), ba, a(b^3)a}
        
        {a, ab, a(b^2), a(b^3), a(b^4), ba}
        
        {a, ab, a(b^2), a(b^3), ba, a(b^2)aba}
        
        {a, ab, a(b^2), a(b^3), ba, a(b^3)(a^2)}
        
        {a, ab, a(b^2), a(b^3), ba, a(b^4)a}
        
        {a, ab, a(b^2), a(b^3), ba, a(b^3)aba}
        
        {a, ab, a(b^2), a(b^3), ba, a(b^5)a}
      - {a, ab, a(b^2), ba, ababa} (4 descendants)
        
        {a, ab, a(b^2), ba, a(b^2)(a^2), ababa}
        
        {a, ab, a(b^2), ba, a(b^3)a, ababa}
        
        {a, ab, a(b^2), ba, ababa, a(b^2)aba}
        
        {a, ab, a(b^2), ba, a(b^4)a, ababa}
      - {a, ab, a(b^2), ba, a(b^2)(a^2)} (4 descendants)
        
        {a, ab, a(b^2), ba, a(b^2)(a^2), a(b^3)a}
        
        {a, ab, a(b^2), ba, a(b^2)(a^2), a(b^2)(a^2)b}
        
        {a, ab, a(b^2), ba, a(b^2)(a^2), a(b^2)aba}
        
        {a, ab, a(b^2), ba, a(b^2)(a^2), a(b^4)a}
      - {a, ab, a(b^2), ba, a(b^3)a} (3 descendants)
        
        {a, ab, a(b^2), ba, a(b^3)a, a(b^2)aba}
        
        {a, ab, a(b^2), ba, a(b^3)a, a(b^3)ab}
        
        {a, ab, a(b^2), ba, a(b^3)a, a(b^4)a}
      - {a, ab, a(b^2), ba, a(b^2)aba} (1 descendant)
        
        {a, ab, a(b^2), ba, a(b^4)a, a(b^2)aba}
      - {a, ab, a(b^2), ba, a(b^4)a} (0 descendants)
    - {a, ab, ba, bab} (6 descendants)
      - {a, ab, ba, b^2a, bab} (10 descendants)
        
        {a, ab, ba, b^2a, bab, a^2ba}
        
        {a, ab, ba, b^2a, ab(a^2), bab}
        
        {a, ab, ba, b^2a, a(b^2)a, bab}
        
        {a, ab, ba, b^2a, bab, b^2ab}
        
        {a, ab, ba, b^2a, b^3a, bab}
        
        {a, ab, ba, b^2a, bab, a^2(b^2)a}
        
        {a, ab, ba, b^2a, bab, ababa}
        
        {a, ab, ba, b^2a, a(b^3)a, bab}
        
        {a, ab, ba, b^2a, bab, aba(b^2)a}
        
        {a, ab, ba, b^2a, a(b^4)a, bab}
      - {a, ab, ba, bab, a^2ba} (6 descendants)
        
        {a, ab, ba, ab(a^2), bab, a^2ba}
        
        {a, ab, ba, a(b^2)a, bab, a^2ba}
        
        {a, ab, ba, bab, a^2ba, a^2bab}
        
        {a, ab, ba, bab, a^2ba, ababa}
        
        {a, ab, ba, a(b^3)a, bab, a^2ba}
        
        {a, ab, ba, bab, a^2ba, b(a^2)ba}
      - {a, ab, ba, ab(a^2), bab} (5 descendants)
        
        {a, ab, ba, ab(a^2), a(b^2)a, bab}
        
        {a, ab, ba, ab(a^2), bab, ab(a^2)b}
        
        {a, ab, ba, ab(a^2), bab, ababa}
        
        {a, ab, ba, ab(a^2), a(b^3)a, bab}
        
        {a, ab, ba, ab(a^2), bab, bab(a^2)}
      - {a, ab, ba, a(b^2)a, bab} (5 descendants)
        
        {a, ab, ba, a(b^2)a, bab, ababa}
        
        {a, ab, ba, a(b^2)a, bab, a(b^2)ab}
        
        {a, ab, ba, a(b^2)a, a(b^3)a, bab}
        
        {a, ab, ba, a(b^2)a, bab, ba(b^2)a}
        
        {a, ab, ba, a(b^2)a, bab, a(b^2)a(b^2)a}
      - {a, ab, ba, bab, ababa} (3 descendants)
        
        {a, ab, ba, a(b^3)a, bab, ababa}
        
        {a, ab, ba, bab, ababa, ababab}
        
        {a, ab, ba, bab, ababa, bababa}
      - {a, ab, ba, a(b^3)a, bab} (2 descendants)
        
        {a, ab, ba, a(b^3)a, bab, a(b^3)ab}
        
        {a, ab, ba, a(b^3)a, bab, ba(b^3)a}
    - {a, ab, ba, b^2a} (9 descendants)
      - {a, ab, ba, b^2a, a^2ba} (9 descendants)
        
        {a, ab, ba, b^2a, ab(a^2), a^2ba}
        
        {a, ab, ba, b^2a, a(b^2)a, a^2ba}
        
        {a, ab, ba, b^2a, b^3a, a^2ba}
        
        {a, ab, ba, b^2a, a^2ba, a^2(b^2)a}
        
        {a, ab, ba, b^2a, a^2ba, ababa}
        
        {a, ab, ba, b^2a, a(b^3)a, a^2ba}
        
        {a, ab, ba, b^2a, a^2ba, b(a^2)ba}
        
        {a, ab, ba, b^2a, a^2ba, aba(b^2)a}
        
        {a, ab, ba, b^2a, a(b^4)a, a^2ba}
      - {a, ab, ba, b^2a, ab(a^2)} (8 descendants)
        
        {a, ab, ba, b^2a, ab(a^2), a(b^2)a}
        
        {a, ab, ba, b^2a, b^3a, ab(a^2)}
        
        {a, ab, ba, b^2a, ab(a^2), a^2(b^2)a}
        
        {a, ab, ba, b^2a, ab(a^2), ab(a^2)b}
        
        {a, ab, ba, b^2a, ab(a^2), ababa}
        
        {a, ab, ba, b^2a, ab(a^2), a(b^3)a}
        
        {a, ab, ba, b^2a, ab(a^2), aba(b^2)a}
        
        {a, ab, ba, b^2a, ab(a^2), a(b^4)a}
      - {a, ab, ba, b^2a, a(b^2)a} (11 descendants)
        
        {a, ab, ba, b^2a, b^3a, a(b^2)a}
        
        {a, ab, ba, b^2a, a(b^2)a, a^2(b^2)a}
        
        {a, ab, ba, b^2a, a(b^2)a, ababa}
        
        {a, ab, ba, b^2a, a(b^2)a, a(b^2)ab}
        
        {a, ab, ba, b^2a, a(b^2)a, a(b^3)a}
        
        {a, ab, ba, b^2a, a(b^2)a, ba(b^2)a}
        
        {a, ab, ba, b^2a, a(b^2)a, a^3(b^2)a}
        
        {a, ab, ba, b^2a, a(b^2)a, aba(b^2)a}
        
        {a, ab, ba, b^2a, a(b^2)a, a(b^4)a}
        
        {a, ab, ba, b^2a, a(b^2)a, ab(a^2)(b^2)a}
        
        {a, ab, ba, b^2a, a(b^2)a, a(b^2)a(b^2)a}
      - {a, ab, ba, b^2a, b^3a} (9 descendants)
        
        {a, ab, ba, b^2a, b^3a, a^2(b^2)a}
        
        {a, ab, ba, b^2a, b^3a, ababa}
        
        {a, ab, ba, b^2a, b^3a, a(b^3)a}
        
        {a, ab, ba, b^2a, b^3a, b^4a}
        
        {a, ab, ba, b^2a, b^3a, a^2(b^3)a}
        
        {a, ab, ba, b^2a, b^3a, aba(b^2)a}
        
        {a, ab, ba, b^2a, b^3a, a(b^4)a}
        
        {a, ab, ba, b^2a, b^3a, aba(b^3)a}
        
        {a, ab, ba, b^2a, b^3a, a(b^5)a}
      - {a, ab, ba, b^2a, a^2(b^2)a} (5 descendants)
        
        {a, ab, ba, b^2a, a^2(b^2)a, ababa}
        
        {a, ab, ba, b^2a, a(b^3)a, a^2(b^2)a}
        
        {a, ab, ba, b^2a, a^2(b^2)a, aba(b^2)a}
        
        {a, ab, ba, b^2a, a(b^4)a, a^2(b^2)a}
        
        {a, ab, ba, b^2a, a^2(b^2)a, b(a^2)(b^2)a}
      - {a, ab, ba, b^2a, ababa} (3 descendants)
        
        {a, ab, ba, b^2a, a(b^3)a, ababa}
        
        {a, ab, ba, b^2a, ababa, aba(b^2)a}
        
        {a, ab, ba, b^2a, a(b^4)a, ababa}
      - {a, ab, ba, b^2a, a(b^3)a} (3 descendants)
        
        {a, ab, ba, b^2a, a(b^3)a, aba(b^2)a}
        
        {a, ab, ba, b^2a, a(b^3)a, a(b^4)a}
        
        {a, ab, ba, b^2a, a(b^3)a, ba(b^3)a}
      - {a, ab, ba, b^2a, aba(b^2)a} (1 descendant)
        
        {a, ab, ba, b^2a, a(b^4)a, aba(b^2)a}
      - {a, ab, ba, b^2a, a(b^4)a} (0 descendants)
    - {a, ab, ba, a^2ba} (5 descendants)
      - {a, ab, ba, ab(a^2), a^2ba} (6 descendants)
        
        {a, ab, ba, ab(a^2), a(b^2)a, a^2ba}
        
        {a, ab, ba, ab(a^2), a^2ba, ab(a^2)b}
        
        {a, ab, ba, ab(a^2), a^2ba, ababa}
        
        {a, ab, ba, ab(a^2), a(b^3)a, a^2ba}
        
        {a, ab, ba, ab(a^2), a^2ba, b(a^2)ba}
        
        {a, ab, ba, ab(a^2), a^2ba, ab(a^3)ba}
      - {a, ab, ba, a(b^2)a, a^2ba} (7 descendants)
        
        {a, ab, ba, a(b^2)a, a^2ba, ababa}
        
        {a, ab, ba, a(b^2)a, a^2ba, a(b^2)ab}
        
        {a, ab, ba, a(b^2)a, a(b^3)a, a^2ba}
        
        {a, ab, ba, a(b^2)a, a^2ba, b(a^2)ba}
        
        {a, ab, ba, a(b^2)a, a^2ba, ba(b^2)a}
        
        {a, ab, ba, a(b^2)a, a^2ba, a(b^2)(a^2)ba}
        
        {a, ab, ba, a(b^2)a, a^2ba, a(b^2)a(b^2)a}
      - {a, ab, ba, a^2ba, ababa} (2 descendants)
        
        {a, ab, ba, a(b^3)a, a^2ba, ababa}
        
        {a, ab, ba, a^2ba, b(a^2)ba, ababa}
      - {a, ab, ba, a(b^3)a, a^2ba} (1 descendant)
        
        {a, ab, ba, a(b^3)a, a^2ba, b(a^2)ba}
      - {a, ab, ba, a^2ba, b(a^2)ba} (1 descendant)
        
        {a, ab, ba, a^2ba, b(a^2)ba, a^2b(a^2)ba}
    - {a, ab, ba, ab(a^2)} (4 descendants)
      - {a, ab, ba, ab(a^2), a(b^2)a} (7 descendants)
        
        {a, ab, ba, ab(a^2), a(b^2)a, ab(a^2)b}
        
        {a, ab, ba, ab(a^2), a(b^2)a, ababa}
        
        {a, ab, ba, ab(a^2), a(b^2)a, a(b^2)ab}
        
        {a, ab, ba, ab(a^2), a(b^2)a, a(b^3)a}
        
        {a, ab, ba, ab(a^2), a(b^2)a, ba(b^2)a}
        
        {a, ab, ba, ab(a^2), a(b^2)a, ab(a^2)(b^2)a}
        
        {a, ab, ba, ab(a^2), a(b^2)a, a(b^2)a(b^2)a}
      - {a, ab, ba, ab(a^2), ab(a^2)b} (3 descendants)
        
        {a, ab, ba, ab(a^2), ab(a^2)b, ababa}
        
        {a, ab, ba, ab(a^2), a(b^3)a, ab(a^2)b}
        
        {a, ab, ba, ab(a^2), ab(a^2)b, ab(a^2)b(a^2)}
      - {a, ab, ba, ab(a^2), ababa} (1 descendant)
        
        {a, ab, ba, ab(a^2), a(b^3)a, ababa}
      - {a, ab, ba, ab(a^2), a(b^3)a} (0 descendants)
    - {a, ab, ba, a(b^2)a} (5 descendants)
      - {a, ab, ba, a(b^2)a, ababa} (4 descendants)
        
        {a, ab, ba, a(b^2)a, a(b^2)ab, ababa}
        
        {a, ab, ba, a(b^2)a, a(b^3)a, ababa}
        
        {a, ab, ba, a(b^2)a, ba(b^2)a, ababa}
        
        {a, ab, ba, a(b^2)a, ababa, a(b^2)a(b^2)a}
      - {a, ab, ba, a(b^2)a, a(b^2)ab} (3 descendants)
        
        {a, ab, ba, a(b^2)a, a(b^3)a, a(b^2)ab}
        
        {a, ab, ba, a(b^2)a, a(b^2)ab, ba(b^2)a}
        
        {a, ab, ba, a(b^2)a, a(b^2)ab, a(b^2)a(b^2)a}
      - {a, ab, ba, a(b^2)a, a(b^3)a} (2 descendants)
        
        {a, ab, ba, a(b^2)a, a(b^3)a, ba(b^2)a}
        
        {a, ab, ba, a(b^2)a, a(b^3)a, a(b^2)a(b^2)a}
      - {a, ab, ba, a(b^2)a, ba(b^2)a} (1 descendant)
        
        {a, ab, ba, a(b^2)a, ba(b^2)a, a(b^2)a(b^2)a}
      - {a, ab, ba, a(b^2)a, a(b^2)a(b^2)a} (0 descendants)
    - {a, ab, ba, ababa} (1 descendant)
      - {a, ab, ba, a(b^3)a, ababa} (0 descendants)
    - {a, ab, ba, a(b^3)a} (0 descendants)
  - {a, a^3, ab} (6 descendants)
    - {a, a^3, ab, aba} (9 descendants)
      - {a, a^3, ab, a(b^2), aba} (11 descendants)
        
        {a, a^3, ab, a(b^2), a^3b, aba}
        
        {a, a^3, ab, a(b^2), aba, ab(a^2)}
        
        {a, a^3, ab, a(b^2), aba, abab}
        
        {a, a^3, ab, a(b^2), aba, a(b^2)a}
        
        {a, a^3, ab, a(b^2), a(b^3), aba}
        
        {a, a^3, a^5, ab, a(b^2), aba}
        
        {a, a^3, ab, a(b^2), aba, a^3ba}
        
        {a, a^3, ab, a(b^2), aba, ab(a^3)}
        
        {a, a^3, ab, a(b^2), aba, ababa}
        
        {a, a^3, ab, a(b^2), aba, a(b^2)(a^2)}
        
        {a, a^3, ab, a(b^2), aba, a(b^3)a}
      - {a, a^3, ab, a^3b, aba} (7 descendants)
        
        {a, a^3, ab, a^3b, aba, ab(a^2)}
        
        {a, a^3, ab, a^3b, aba, abab}
        
        {a, a^3, ab, a^3b, aba, a(b^2)a}
        
        {a, a^3, a^5, ab, a^3b, aba}
        
        {a, a^3, ab, a^3b, aba, a^3ba}
        
        {a, a^3, ab, a^3b, aba, ab(a^3)}
        
        {a, a^3, ab, a^3b, aba, ababa}
      - {a, a^3, ab, aba, ab(a^2)} (9 descendants)
        
        {a, a^3, ab, aba, ab(a^2), abab}
        
        {a, a^3, ab, aba, ab(a^2), a(b^2)a}
        
        {a, a^3, a^5, ab, aba, ab(a^2)}
        
        {a, a^3, ab, aba, ab(a^2), a^3ba}
        
        {a, a^3, ab, aba, ab(a^2), ab(a^3)}
        
        {a, a^3, ab, aba, ab(a^2), ab(a^2)b}
        
        {a, a^3, ab, aba, ab(a^2), ababa}
        
        {a, a^3, ab, aba, ab(a^2), ab(a^4)}
        
        {a, a^3, ab, aba, ab(a^2), ab(a^2)ba}
      - {a, a^3, ab, aba, abab} (8 descendants)
        
        {a, a^3, ab, aba, a(b^2)a, abab}
        
        {a, a^3, a^5, ab, aba, abab}
        
        {a, a^3, ab, aba, a^3ba, abab}
        
        {a, a^3, ab, aba, ab(a^3), abab}
        
        {a, a^3, ab, aba, abab, ababa}
        
        {a, a^3, ab, aba, abab, aba(b^2)}
        
        {a, a^3, ab, aba, abab, abab(a^2)}
        
        {a, a^3, ab, aba, abab, aba(b^2)a}
      - {a, a^3, ab, aba, a(b^2)a} (7 descendants)
        
        {a, a^3, a^5, ab, aba, a(b^2)a}
        
        {a, a^3, ab, aba, a(b^2)a, a^3ba}
        
        {a, a^3, ab, aba, ab(a^3), a(b^2)a}
        
        {a, a^3, ab, aba, a(b^2)a, ababa}
        
        {a, a^3, ab, aba, a(b^2)a, a(b^2)ab}
        
        {a, a^3, ab, aba, a(b^2)a, a(b^2)(a^3)}
        
        {a, a^3, ab, aba, a(b^2)a, a(b^2)aba}
      - {a, a^3, a^5, ab, aba} (4 descendants)
        
        {a, a^3, a^5, ab, aba, a^3ba}
        
        {a, a^3, a^5, ab, aba, ab(a^3)}
        
        {a, a^3, a^5, ab, aba, ababa}
        
        {a, a^3, a^5, a^7, ab, aba}
      - {a, a^3, ab, aba, a^3ba} (2 descendants)
        
        {a, a^3, ab, aba, ab(a^3), a^3ba}
        
        {a, a^3, ab, aba, a^3ba, ababa}
      - {a, a^3, ab, aba, ab(a^3)} (4 descendants)
        
        {a, a^3, ab, aba, ab(a^3), ababa}
        
        {a, a^3, ab, aba, ab(a^3), ab(a^3)b}
        
        {a, a^3, ab, aba, ab(a^3), ab(a^5)}
        
        {a, a^3, ab, aba, ab(a^3), ab(a^3)ba}
      - {a, a^3, ab, aba, ababa} (3 descendants)
        
        {a, a^3, ab, aba, ababa, ababab}
        
        {a, a^3, ab, aba, ababa, abab(a^3)}
        
        {a, a^3, ab, aba, ababa, abababa}
    - {a, a^3, ab, a(b^2)} (7 descendants)
      - {a, a^3, ab, a(b^2), a^3b} (7 descendants)
        
        {a, a^3, ab, a(b^2), a^3b, ab(a^2)}
        
        {a, a^3, ab, a(b^2), a^3b, a(b^2)a}
        
        {a, a^3, ab, a(b^2), a(b^3), a^3b}
        
        {a, a^3, a^5, ab, a(b^2), a^3b}
        
        {a, a^3, ab, a(b^2), a^3b, a^3(b^2)}
        
        {a, a^3, ab, a(b^2), a^3b, a(b^2)(a^2)}
        
        {a, a^3, ab, a(b^2), a^3b, a(b^3)a}
      - {a, a^3, ab, a(b^2), ab(a^2)} (7 descendants)
        
        {a, a^3, ab, a(b^2), ab(a^2), a(b^2)a}
        
        {a, a^3, ab, a(b^2), a(b^3), ab(a^2)}
        
        {a, a^3, a^5, ab, a(b^2), ab(a^2)}
        
        {a, a^3, ab, a(b^2), ab(a^2), ab(a^2)b}
        
        {a, a^3, ab, a(b^2), ab(a^2), a(b^2)(a^2)}
        
        {a, a^3, ab, a(b^2), ab(a^2), a(b^3)a}
        
        {a, a^3, ab, a(b^2), ab(a^2), ab(a^4)}
      - {a, a^3, ab, a(b^2), a(b^2)a} (7 descendants)
        
        {a, a^3, ab, a(b^2), a(b^3), a(b^2)a}
        
        {a, a^3, a^5, ab, a(b^2), a(b^2)a}
        
        {a, a^3, ab, a(b^2), a(b^2)a, a(b^2)(a^2)}
        
        {a, a^3, ab, a(b^2), a(b^2)a, a(b^2)ab}
        
        {a, a^3, ab, a(b^2), a(b^2)a, a(b^3)a}
        
        {a, a^3, ab, a(b^2), a(b^2)a, a(b^2)(a^3)}
        
        {a, a^3, ab, a(b^2), a(b^2)a, a(b^2)aba}
      - {a, a^3, ab, a(b^2), a(b^3)} (6 descendants)
        
        {a, a^3, a^5, ab, a(b^2), a(b^3)}
        
        {a, a^3, ab, a(b^2), a(b^3), a(b^2)(a^2)}
        
        {a, a^3, ab, a(b^2), a(b^3), a(b^3)a}
        
        {a, a^3, ab, a(b^2), a(b^3), a(b^4)}
        
        {a, a^3, ab, a(b^2), a(b^3), a(b^3)(a^2)}
        
        {a, a^3, ab, a(b^2), a(b^3), a(b^4)a}
      - {a, a^3, a^5, ab, a(b^2)} (3 descendants)
        
        {a, a^3, a^5, ab, a(b^2), a(b^2)(a^2)}
        
        {a, a^3, a^5, ab, a(b^2), a(b^3)a}
        
        {a, a^3, a^5, a^7, ab, a(b^2)}
      - {a, a^3, ab, a(b^2), a(b^2)(a^2)} (3 descendants)
        
        {a, a^3, ab, a(b^2), a(b^2)(a^2), a(b^3)a}
        
        {a, a^3, ab, a(b^2), a(b^2)(a^2), a(b^2)(a^2)b}
        
        {a, a^3, ab, a(b^2), a(b^2)(a^2), a(b^2)(a^4)}
      - {a, a^3, ab, a(b^2), a(b^3)a} (2 descendants)
        
        {a, a^3, ab, a(b^2), a(b^3)a, a(b^3)ab}
        
        {a, a^3, ab, a(b^2), a(b^3)a, a(b^3)(a^3)}
    - {a, a^3, ab, a^3b} (3 descendants)
      - {a, a^3, ab, a^3b, ab(a^2)} (5 descendants)
        
        {a, a^3, ab, a^3b, ab(a^2), a(b^2)a}
        
        {a, a^3, a^5, ab, a^3b, ab(a^2)}
        
        {a, a^3, ab, a^3b, ab(a^2), ab(a^2)b}
        
        {a, a^3, ab, a^3b, ab(a^2), a^3b(a^2)}
        
        {a, a^3, ab, a^3b, ab(a^2), ab(a^4)}
      - {a, a^3, ab, a^3b, a(b^2)a} (4 descendants)
        
        {a, a^3, a^5, ab, a^3b, a(b^2)a}
        
        {a, a^3, ab, a^3b, a(b^2)a, a(b^2)ab}
        
        {a, a^3, ab, a^3b, a(b^2)a, a^3(b^2)a}
        
        {a, a^3, ab, a^3b, a(b^2)a, a(b^2)(a^3)}
      - {a, a^3, a^5, ab, a^3b} (2 descendants)
        
        {a, a^3, a^5, ab, a^3b, a^5b}
        
        {a, a^3, a^5, a^7, ab, a^3b}
    - {a, a^3, ab, ab(a^2)} (4 descendants)
      - {a, a^3, ab, ab(a^2), a(b^2)a} (5 descendants)
        
        {a, a^3, a^5, ab, ab(a^2), a(b^2)a}
        
        {a, a^3, ab, ab(a^2), a(b^2)a, ab(a^2)b}
        
        {a, a^3, ab, ab(a^2), a(b^2)a, a(b^2)ab}
        
        {a, a^3, ab, ab(a^2), ab(a^4), a(b^2)a}
        
        {a, a^3, ab, ab(a^2), a(b^2)a, a(b^2)(a^3)}
      - {a, a^3, a^5, ab, ab(a^2)} (3 descendants)
        
        {a, a^3, a^5, ab, ab(a^2), ab(a^2)b}
        
        {a, a^3, a^5, ab, ab(a^2), ab(a^4)}
        
        {a, a^3, a^5, a^7, ab, ab(a^2)}
      - {a, a^3, ab, ab(a^2), ab(a^2)b} (2 descendants)
        
        {a, a^3, ab, ab(a^2), ab(a^4), ab(a^2)b}
        
        {a, a^3, ab, ab(a^2), ab(a^2)b, ab(a^2)b(a^2)}
      - {a, a^3, ab, ab(a^2), ab(a^4)} (0 descendants)
    - {a, a^3, ab, a(b^2)a} (3 descendants)
      - {a, a^3, a^5, ab, a(b^2)a} (3 descendants)
        
        {a, a^3, a^5, ab, a(b^2)a, a(b^2)ab}
        
        {a, a^3, a^5, ab, a(b^2)a, a(b^2)(a^3)}
        
        {a, a^3, a^5, a^7, ab, a(b^2)a}
      - {a, a^3, ab, a(b^2)a, a(b^2)ab} (2 descendants)
        
        {a, a^3, ab, a(b^2)a, a(b^2)(a^3), a(b^2)ab}
        
        {a, a^3, ab, a(b^2)a, a(b^2)ab, a(b^2)a(b^2)a}
      - {a, a^3, ab, a(b^2)a, a(b^2)(a^3)} (0 descendants)
    - {a, a^3, a^5, ab} (1 descendant)
      - {a, a^3, a^5, a^7, ab} (1 descendant)
        
        {a, a^3, a^5, a^7, a^9, ab}
  - {a, ab, aba} (6 descendants)
    - {a, ab, a(b^2), aba} (8 descendants)
      - {a, ab, a(b^2), aba, ab(a^2)} (10 descendants)
        
        {a, ab, a(b^2), aba, ab(a^2), abab}
        
        {a, ab, a(b^2), aba, ab(a^2), a(b^2)a}
        
        {a, ab, a(b^2), a(b^3), aba, ab(a^2)}
        
        {a, ab, a(b^2), aba, ab(a^2), ab(a^3)}
        
        {a, ab, a(b^2), aba, ab(a^2), ab(a^2)b}
        
        {a, ab, a(b^2), aba, ab(a^2), ababa}
        
        {a, ab, a(b^2), aba, ab(a^2), a(b^2)(a^2)}
        
        {a, ab, a(b^2), aba, ab(a^2), a(b^3)a}
        
        {a, ab, a(b^2), aba, ab(a^2), ab(a^4)}
        
        {a, ab, a(b^2), aba, ab(a^2), ab(a^2)ba}
      - {a, ab, a(b^2), aba, abab} (9 descendants)
        
        {a, ab, a(b^2), aba, a(b^2)a, abab}
        
        {a, ab, a(b^2), a(b^3), aba, abab}
        
        {a, ab, a(b^2), aba, ab(a^3), abab}
        
        {a, ab, a(b^2), aba, abab, ababa}
        
        {a, ab, a(b^2), aba, abab, aba(b^2)}
        
        {a, ab, a(b^2), aba, a(b^2)(a^2), abab}
        
        {a, ab, a(b^2), aba, a(b^3)a, abab}
        
        {a, ab, a(b^2), aba, abab, abab(a^2)}
        
        {a, ab, a(b^2), aba, abab, aba(b^2)a}
      - {a, ab, a(b^2), aba, a(b^2)a} (8 descendants)
        
        {a, ab, a(b^2), a(b^3), aba, a(b^2)a}
        
        {a, ab, a(b^2), aba, ab(a^3), a(b^2)a}
        
        {a, ab, a(b^2), aba, a(b^2)a, ababa}
        
        {a, ab, a(b^2), aba, a(b^2)a, a(b^2)(a^2)}
        
        {a, ab, a(b^2), aba, a(b^2)a, a(b^2)ab}
        
        {a, ab, a(b^2), aba, a(b^2)a, a(b^3)a}
        
        {a, ab, a(b^2), aba, a(b^2)a, a(b^2)(a^3)}
        
        {a, ab, a(b^2), aba, a(b^2)a, a(b^2)aba}
      - {a, ab, a(b^2), a(b^3), aba} (7 descendants)
        
        {a, ab, a(b^2), a(b^3), aba, ab(a^3)}
        
        {a, ab, a(b^2), a(b^3), aba, ababa}
        
        {a, ab, a(b^2), a(b^3), aba, a(b^2)(a^2)}
        
        {a, ab, a(b^2), a(b^3), aba, a(b^3)a}
        
        {a, ab, a(b^2), a(b^3), a(b^4), aba}
        
        {a, ab, a(b^2), a(b^3), aba, a(b^3)(a^2)}
        
        {a, ab, a(b^2), a(b^3), aba, a(b^4)a}
      - {a, ab, a(b^2), aba, ab(a^3)} (5 descendants)
        
        {a, ab, a(b^2), aba, ab(a^3), ababa}
        
        {a, ab, a(b^2), aba, ab(a^3), a(b^2)(a^2)}
        
        {a, ab, a(b^2), aba, ab(a^3), a(b^3)a}
        
        {a, ab, a(b^2), aba, ab(a^3), ab(a^3)b}
        
        {a, ab, a(b^2), aba, ab(a^3), ab(a^3)ba}
      - {a, ab, a(b^2), aba, ababa} (4 descendants)
        
        {a, ab, a(b^2), aba, a(b^2)(a^2), ababa}
        
        {a, ab, a(b^2), aba, a(b^3)a, ababa}
        
        {a, ab, a(b^2), aba, ababa, ababab}
        
        {a, ab, a(b^2), aba, ababa, abababa}
      - {a, ab, a(b^2), aba, a(b^2)(a^2)} (3 descendants)
        
        {a, ab, a(b^2), aba, a(b^2)(a^2), a(b^3)a}
        
        {a, ab, a(b^2), aba, a(b^2)(a^2), a(b^2)(a^2)b}
        
        {a, ab, a(b^2), aba, a(b^2)(a^2), a(b^2)(a^2)ba}
      - {a, ab, a(b^2), aba, a(b^3)a} (2 descendants)
        
        {a, ab, a(b^2), aba, a(b^3)a, a(b^3)ab}
        
        {a, ab, a(b^2), aba, a(b^3)a, a(b^3)aba}
    - {a, ab, aba, ab(a^2)} (7 descendants)
      - {a, ab, aba, ab(a^2), abab} (9 descendants)
        
        {a, ab, aba, ab(a^2), a(b^2)a, abab}
        
        {a, ab, aba, ab(a^2), ab(a^3), abab}
        
        {a, ab, aba, ab(a^2), abab, ab(a^2)b}
        
        {a, ab, aba, ab(a^2), abab, ababa}
        
        {a, ab, aba, ab(a^2), abab, aba(b^2)}
        
        {a, ab, aba, ab(a^2), ab(a^4), abab}
        
        {a, ab, aba, ab(a^2), abab, ab(a^2)ba}
        
        {a, ab, aba, ab(a^2), abab, abab(a^2)}
        
        {a, ab, aba, ab(a^2), abab, aba(b^2)a}
      - {a, ab, aba, ab(a^2), a(b^2)a} (7 descendants)
        
        {a, ab, aba, ab(a^2), ab(a^3), a(b^2)a}
        
        {a, ab, aba, ab(a^2), a(b^2)a, ab(a^2)b}
        
        {a, ab, aba, ab(a^2), a(b^2)a, ababa}
        
        {a, ab, aba, ab(a^2), a(b^2)a, a(b^2)ab}
        
        {a, ab, aba, ab(a^2), ab(a^4), a(b^2)a}
        
        {a, ab, aba, ab(a^2), a(b^2)a, ab(a^2)ba}
        
        {a, ab, aba, ab(a^2), a(b^2)a, a(b^2)aba}
      - {a, ab, aba, ab(a^2), ab(a^3)} (7 descendants)
        
        {a, ab, aba, ab(a^2), ab(a^3), ab(a^2)b}
        
        {a, ab, aba, ab(a^2), ab(a^3), ababa}
        
        {a, ab, aba, ab(a^2), ab(a^3), ab(a^4)}
        
        {a, ab, aba, ab(a^2), ab(a^3), ab(a^3)b}
        
        {a, ab, aba, ab(a^2), ab(a^3), ab(a^2)ba}
        
        {a, ab, aba, ab(a^2), ab(a^3), ab(a^5)}
        
        {a, ab, aba, ab(a^2), ab(a^3), ab(a^3)ba}
      - {a, ab, aba, ab(a^2), ab(a^2)b} (6 descendants)
        
        {a, ab, aba, ab(a^2), ab(a^2)b, ababa}
        
        {a, ab, aba, ab(a^2), ab(a^4), ab(a^2)b}
        
        {a, ab, aba, ab(a^2), ab(a^2)b, ab(a^2)ba}
        
        {a, ab, aba, ab(a^2), ab(a^2)b, ab(a^2)(b^2)}
        
        {a, ab, aba, ab(a^2), ab(a^2)b, ab(a^2)b(a^2)}
        
        {a, ab, aba, ab(a^2), ab(a^2)b, ab(a^2)(b^2)a}
      - {a, ab, aba, ab(a^2), ababa} (4 descendants)
        
        {a, ab, aba, ab(a^2), ab(a^4), ababa}
        
        {a, ab, aba, ab(a^2), ababa, ab(a^2)ba}
        
        {a, ab, aba, ab(a^2), ababa, ababab}
        
        {a, ab, aba, ab(a^2), ababa, abababa}
      - {a, ab, aba, ab(a^2), ab(a^4)} (3 descendants)
        
        {a, ab, aba, ab(a^2), ab(a^4), ab(a^2)ba}
        
        {a, ab, aba, ab(a^2), ab(a^4), ab(a^4)b}
        
        {a, ab, aba, ab(a^2), ab(a^4), ab(a^4)ba}
      - {a, ab, aba, ab(a^2), ab(a^2)ba} (2 descendants)
        
        {a, ab, aba, ab(a^2), ab(a^2)ba, ab(a^2)bab}
        
        {a, ab, aba, ab(a^2), ab(a^2)ba, ab(a^2)baba}
    - {a, ab, aba, abab} (6 descendants)
      - {a, ab, aba, a(b^2)a, abab} (7 descendants)
        
        {a, ab, aba, ab(a^3), a(b^2)a, abab}
        
        {a, ab, aba, a(b^2)a, abab, ababa}
        
        {a, ab, aba, a(b^2)a, abab, aba(b^2)}
        
        {a, ab, aba, a(b^2)a, abab, a(b^2)ab}
        
        {a, ab, aba, a(b^2)a, abab, abab(a^2)}
        
        {a, ab, aba, a(b^2)a, abab, aba(b^2)a}
        
        {a, ab, aba, a(b^2)a, abab, a(b^2)aba}
      - {a, ab, aba, ab(a^3), abab} (6 descendants)
        
        {a, ab, aba, ab(a^3), abab, ababa}
        
        {a, ab, aba, ab(a^3), abab, aba(b^2)}
        
        {a, ab, aba, ab(a^3), abab, ab(a^3)b}
        
        {a, ab, aba, ab(a^3), abab, abab(a^2)}
        
        {a, ab, aba, ab(a^3), abab, aba(b^2)a}
        
        {a, ab, aba, ab(a^3), abab, ab(a^3)ba}
      - {a, ab, aba, abab, ababa} (6 descendants)
        
        {a, ab, aba, abab, aba(b^2), ababa}
        
        {a, ab, aba, abab, ababa, abab(a^2)}
        
        {a, ab, aba, abab, ababa, ababab}
        
        {a, ab, aba, abab, ababa, aba(b^2)a}
        
        {a, ab, aba, abab, ababa, abab(a^3)}
        
        {a, ab, aba, abab, ababa, abababa}
      - {a, ab, aba, abab, aba(b^2)} (5 descendants)
        
        {a, ab, aba, abab, aba(b^2), abab(a^2)}
        
        {a, ab, aba, abab, aba(b^2), aba(b^2)a}
        
        {a, ab, aba, abab, aba(b^2), aba(b^3)}
        
        {a, ab, aba, abab, aba(b^2), aba(b^2)(a^2)}
        
        {a, ab, aba, abab, aba(b^2), aba(b^3)a}
      - {a, ab, aba, abab, abab(a^2)} (3 descendants)
        
        {a, ab, aba, abab, abab(a^2), aba(b^2)a}
        
        {a, ab, aba, abab, abab(a^2), abab(a^2)b}
        
        {a, ab, aba, abab, abab(a^2), abab(a^2)ba}
      - {a, ab, aba, abab, aba(b^2)a} (2 descendants)
        
        {a, ab, aba, abab, aba(b^2)a, aba(b^2)ab}
        
        {a, ab, aba, abab, aba(b^2)a, aba(b^2)aba}
    - {a, ab, aba, a(b^2)a} (4 descendants)
      - {a, ab, aba, ab(a^3), a(b^2)a} (5 descendants)
        
        {a, ab, aba, ab(a^3), a(b^2)a, ababa}
        
        {a, ab, aba, ab(a^3), a(b^2)a, a(b^2)ab}
        
        {a, ab, aba, ab(a^3), a(b^2)a, ab(a^3)b}
        
        {a, ab, aba, ab(a^3), a(b^2)a, a(b^2)aba}
        
        {a, ab, aba, ab(a^3), a(b^2)a, ab(a^3)ba}
      - {a, ab, aba, a(b^2)a, ababa} (4 descendants)
        
        {a, ab, aba, a(b^2)a, a(b^2)ab, ababa}
        
        {a, ab, aba, a(b^2)a, ababa, ababab}
        
        {a, ab, aba, a(b^2)a, ababa, a(b^2)aba}
        
        {a, ab, aba, a(b^2)a, ababa, abababa}
      - {a, ab, aba, a(b^2)a, a(b^2)ab} (2 descendants)
        
        {a, ab, aba, a(b^2)a, a(b^2)ab, a(b^2)aba}
        
        {a, ab, aba, a(b^2)a, a(b^2)ab, a(b^2)a(b^2)a}
      - {a, ab, aba, a(b^2)a, a(b^2)aba} (0 descendants)
    - {a, ab, aba, ab(a^3)} (3 descendants)
      - {a, ab, aba, ab(a^3), ababa} (4 descendants)
        
        {a, ab, aba, ab(a^3), ab(a^3)b, ababa}
        
        {a, ab, aba, ab(a^3), ababa, ababab}
        
        {a, ab, aba, ab(a^3), ababa, ab(a^3)ba}
        
        {a, ab, aba, ab(a^3), ababa, abababa}
      - {a, ab, aba, ab(a^3), ab(a^3)b} (1 descendant)
        
        {a, ab, aba, ab(a^3), ab(a^3)b, ab(a^3)ba}
      - {a, ab, aba, ab(a^3), ab(a^3)ba} (0 descendants)
    - {a, ab, aba, ababa} (2 descendants)
      - {a, ab, aba, ababa, ababab} (1 descendant)
        
        {a, ab, aba, ababa, ababab, abababa}
      - {a, ab, aba, ababa, abababa} (1 descendant)
        
        {a, ab, aba, ababa, abababa, ababababa}
  - {a, ab, a(b^2)} (5 descendants)
    - {a, ab, a(b^2), ab(a^2)} (5 descendants)
      - {a, ab, a(b^2), ab(a^2), a(b^2)a} (7 descendants)
        
        {a, ab, a(b^2), a(b^3), ab(a^2), a(b^2)a}
        
        {a, ab, a(b^2), ab(a^2), a(b^2)a, ab(a^2)b}
        
        {a, ab, a(b^2), ab(a^2), a(b^2)a, a(b^2)(a^2)}
        
        {a, ab, a(b^2), ab(a^2), a(b^2)a, a(b^2)ab}
        
        {a, ab, a(b^2), ab(a^2), a(b^2)a, a(b^3)a}
        
        {a, ab, a(b^2), ab(a^2), a(b^2)a, a(b^2)(a^3)}
        
        {a, ab, a(b^2), ab(a^2), a(b^2)a, a(b^2)aba}
      - {a, ab, a(b^2), a(b^3), ab(a^2)} (6 descendants)
        
        {a, ab, a(b^2), a(b^3), ab(a^2), ab(a^2)b}
        
        {a, ab, a(b^2), a(b^3), ab(a^2), a(b^2)(a^2)}
        
        {a, ab, a(b^2), a(b^3), ab(a^2), a(b^3)a}
        
        {a, ab, a(b^2), a(b^3), a(b^4), ab(a^2)}
        
        {a, ab, a(b^2), a(b^3), ab(a^2), a(b^3)(a^2)}
        
        {a, ab, a(b^2), a(b^3), ab(a^2), a(b^4)a}
      - {a, ab, a(b^2), ab(a^2), ab(a^2)b} (4 descendants)
        
        {a, ab, a(b^2), ab(a^2), a(b^2)(a^2), ab(a^2)b}
        
        {a, ab, a(b^2), ab(a^2), a(b^3)a, ab(a^2)b}
        
        {a, ab, a(b^2), ab(a^2), ab(a^2)b, ab(a^2)(b^2)}
        
        {a, ab, a(b^2), ab(a^2), ab(a^2)b, ab(a^2)b(a^2)}
      - {a, ab, a(b^2), ab(a^2), a(b^2)(a^2)} (2 descendants)
        
        {a, ab, a(b^2), ab(a^2), a(b^2)(a^2), a(b^3)a}
        
        {a, ab, a(b^2), ab(a^2), a(b^2)(a^2), a(b^2)(a^2)b}
      - {a, ab, a(b^2), ab(a^2), a(b^3)a} (1 descendant)
        
        {a, ab, a(b^2), ab(a^2), a(b^3)a, a(b^3)ab}
    - {a, ab, a(b^2), a(b^2)a} (6 descendants)
      - {a, ab, a(b^2), a(b^3), a(b^2)a} (8 descendants)
        
        {a, ab, a(b^2), a(b^3), a(b^2)a, a(b^2)(a^2)}
        
        {a, ab, a(b^2), a(b^3), a(b^2)a, a(b^2)ab}
        
        {a, ab, a(b^2), a(b^3), a(b^2)a, a(b^3)a}
        
        {a, ab, a(b^2), a(b^3), a(b^4), a(b^2)a}
        
        {a, ab, a(b^2), a(b^3), a(b^2)a, a(b^2)(a^3)}
        
        {a, ab, a(b^2), a(b^3), a(b^2)a, a(b^2)aba}
        
        {a, ab, a(b^2), a(b^3), a(b^2)a, a(b^3)(a^2)}
        
        {a, ab, a(b^2), a(b^3), a(b^2)a, a(b^4)a}
      - {a, ab, a(b^2), a(b^2)a, a(b^2)(a^2)} (7 descendants)
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)(a^2), a(b^2)ab}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)(a^2), a(b^3)a}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)(a^2), a(b^2)(a^3)}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)(a^2), a(b^2)(a^2)b}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)(a^2), a(b^2)aba}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)(a^2), a(b^2)(a^4)}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)(a^2), a(b^2)(a^2)ba}
      - {a, ab, a(b^2), a(b^2)a, a(b^2)ab} (6 descendants)
        
        {a, ab, a(b^2), a(b^2)a, a(b^3)a, a(b^2)ab}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)(a^3), a(b^2)ab}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)ab, a(b^2)aba}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)ab, a(b^2)a(b^2)}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)ab, a(b^2)ab(a^2)}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)ab, a(b^2)a(b^2)a}
      - {a, ab, a(b^2), a(b^2)a, a(b^3)a} (3 descendants)
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)(a^3), a(b^3)a}
        
        {a, ab, a(b^2), a(b^2)a, a(b^3)a, a(b^2)aba}
        
        {a, ab, a(b^2), a(b^2)a, a(b^3)a, a(b^3)ab}
      - {a, ab, a(b^2), a(b^2)a, a(b^2)(a^3)} (2 descendants)
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)(a^3), a(b^2)aba}
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)(a^3), a(b^2)(a^3)b}
      - {a, ab, a(b^2), a(b^2)a, a(b^2)aba} (1 descendant)
        
        {a, ab, a(b^2), a(b^2)a, a(b^2)aba, a(b^2)abab}
    - {a, ab, a(b^2), a(b^3)} (5 descendants)
      - {a, ab, a(b^2), a(b^3), a(b^2)(a^2)} (5 descendants)
        
        {a, ab, a(b^2), a(b^3), a(b^2)(a^2), a(b^3)a}
        
        {a, ab, a(b^2), a(b^3), a(b^4), a(b^2)(a^2)}
        
        {a, ab, a(b^2), a(b^3), a(b^2)(a^2), a(b^2)(a^2)b}
        
        {a, ab, a(b^2), a(b^3), a(b^2)(a^2), a(b^3)(a^2)}
        
        {a, ab, a(b^2), a(b^3), a(b^2)(a^2), a(b^4)a}
      - {a, ab, a(b^2), a(b^3), a(b^3)a} (6 descendants)
        
        {a, ab, a(b^2), a(b^3), a(b^4), a(b^3)a}
        
        {a, ab, a(b^2), a(b^3), a(b^3)a, a(b^3)(a^2)}
        
        {a, ab, a(b^2), a(b^3), a(b^3)a, a(b^3)ab}
        
        {a, ab, a(b^2), a(b^3), a(b^3)a, a(b^4)a}
        
        {a, ab, a(b^2), a(b^3), a(b^3)a, a(b^3)(a^3)}
        
        {a, ab, a(b^2), a(b^3), a(b^3)a, a(b^3)aba}
      - {a, ab, a(b^2), a(b^3), a(b^4)} (5 descendants)
        
        {a, ab, a(b^2), a(b^3), a(b^4), a(b^3)(a^2)}
        
        {a, ab, a(b^2), a(b^3), a(b^4), a(b^4)a}
        
        {a, ab, a(b^2), a(b^3), a(b^4), a(b^5)}
        
        {a, ab, a(b^2), a(b^3), a(b^4), a(b^4)(a^2)}
        
        {a, ab, a(b^2), a(b^3), a(b^4), a(b^5)a}
      - {a, ab, a(b^2), a(b^3), a(b^3)(a^2)} (2 descendants)
        
        {a, ab, a(b^2), a(b^3), a(b^3)(a^2), a(b^4)a}
        
        {a, ab, a(b^2), a(b^3), a(b^3)(a^2), a(b^3)(a^2)b}
      - {a, ab, a(b^2), a(b^3), a(b^4)a} (1 descendant)
        
        {a, ab, a(b^2), a(b^3), a(b^4)a, a(b^4)ab}
    - {a, ab, a(b^2), a(b^2)(a^2)} (2 descendants)
      - {a, ab, a(b^2), a(b^2)(a^2), a(b^3)a} (2 descendants)
        
        {a, ab, a(b^2), a(b^2)(a^2), a(b^3)a, a(b^2)(a^2)b}
        
        {a, ab, a(b^2), a(b^2)(a^2), a(b^3)a, a(b^3)ab}
      - {a, ab, a(b^2), a(b^2)(a^2), a(b^2)(a^2)b} (1 descendant)
        
        {a, ab, a(b^2), a(b^2)(a^2), a(b^2)(a^2)b, a(b^2)(a^2)(b^2)}
    - {a, ab, a(b^2), a(b^3)a} (1 descendant)
      - {a, ab, a(b^2), a(b^3)a, a(b^3)ab} (1 descendant)
        
        {a, ab, a(b^2), a(b^3)a, a(b^3)ab, a(b^3)a(b^2)}
  - {a, ab, ab(a^2)} (2 descendants)
    - {a, ab, ab(a^2), a(b^2)a} (2 descendants)
      - {a, ab, ab(a^2), a(b^2)a, ab(a^2)b} (3 descendants)
        
        {a, ab, ab(a^2), a(b^2)a, ab(a^2)b, a(b^2)ab}
        
        {a, ab, ab(a^2), a(b^2)a, ab(a^2)b, ab(a^2)b(a^2)}
        
        {a, ab, ab(a^2), a(b^2)a, ab(a^2)b, ab(a^2)(b^2)a}
      - {a, ab, ab(a^2), a(b^2)a, a(b^2)ab} (2 descendants)
        
        {a, ab, ab(a^2), a(b^2)a, a(b^2)ab, a(b^2)ab(a^2)}
        
        {a, ab, ab(a^2), a(b^2)a, a(b^2)ab, a(b^2)a(b^2)a}
    - {a, ab, ab(a^2), ab(a^2)b} (1 descendant)
      - {a, ab, ab(a^2), ab(a^2)b, ab(a^2)b(a^2)} (1 descendant)
        
        {a, ab, ab(a^2), ab(a^2)b, ab(a^2)b(a^2), ab(a^2)b(a^2)b}
  - {a, ab, a(b^2)a} (1 descendant)
    - {a, ab, a(b^2)a, a(b^2)ab} (1 descendant)
      - {a, ab, a(b^2)a, a(b^2)ab, a(b^2)a(b^2)a} (1 descendant)
        
        {a, ab, a(b^2)a, a(b^2)ab, a(b^2)a(b^2)a, a(b^2)a(b^2)ab}
- {a, ba} (5 descendants)
  - {a, a^3, ba} (6 descendants)
    - {a, a^3, ba, aba} (9 descendants)
      - {a, a^3, ba, b^2a, aba} (11 descendants)
        
        {a, a^3, ba, b^2a, aba, a^2ba}
        
        {a, a^3, ba, b^2a, aba, a(b^2)a}
        
        {a, a^3, ba, b(a^3), b^2a, aba}
        
        {a, a^3, ba, b^2a, aba, baba}
        
        {a, a^3, ba, b^2a, b^3a, aba}
        
        {a, a^3, a^5, ba, b^2a, aba}
        
        {a, a^3, ba, b^2a, aba, a^3ba}
        
        {a, a^3, ba, b^2a, aba, a^2(b^2)a}
        
        {a, a^3, ba, b^2a, aba, ab(a^3)}
        
        {a, a^3, ba, b^2a, aba, ababa}
        
        {a, a^3, ba, b^2a, aba, a(b^3)a}
      - {a, a^3, ba, aba, a^2ba} (10 descendants)
        
        {a, a^3, ba, aba, a(b^2)a, a^2ba}
        
        {a, a^3, ba, b(a^3), aba, a^2ba}
        
        {a, a^3, ba, aba, a^2ba, baba}
        
        {a, a^3, a^5, ba, aba, a^2ba}
        
        {a, a^3, ba, aba, a^2ba, a^3ba}
        
        {a, a^3, ba, aba, ab(a^3), a^2ba}
        
        {a, a^3, ba, aba, a^2ba, ababa}
        
        {a, a^3, ba, aba, a^2ba, b(a^2)ba}
        
        {a, a^3, ba, aba, a^2ba, a^4ba}
        
        {a, a^3, ba, aba, a^2ba, ab(a^2)ba}
      - {a, a^3, ba, aba, a(b^2)a} (9 descendants)
        
        {a, a^3, ba, b(a^3), aba, a(b^2)a}
        
        {a, a^3, ba, aba, a(b^2)a, baba}
        
        {a, a^3, a^5, ba, aba, a(b^2)a}
        
        {a, a^3, ba, aba, a(b^2)a, a^3ba}
        
        {a, a^3, ba, aba, ab(a^3), a(b^2)a}
        
        {a, a^3, ba, aba, a(b^2)a, ababa}
        
        {a, a^3, ba, aba, a(b^2)a, ba(b^2)a}
        
        {a, a^3, ba, aba, a(b^2)a, a^3(b^2)a}
        
        {a, a^3, ba, aba, a(b^2)a, aba(b^2)a}
      - {a, a^3, ba, b(a^3), aba} (5 descendants)
        
        {a, a^3, ba, b(a^3), aba, baba}
        
        {a, a^3, a^5, ba, b(a^3), aba}
        
        {a, a^3, ba, b(a^3), aba, a^3ba}
        
        {a, a^3, ba, b(a^3), aba, ab(a^3)}
        
        {a, a^3, ba, b(a^3), aba, ababa}
      - {a, a^3, ba, aba, baba} (7 descendants)
        
        {a, a^3, a^5, ba, aba, baba}
        
        {a, a^3, ba, aba, a^3ba, baba}
        
        {a, a^3, ba, aba, ab(a^3), baba}
        
        {a, a^3, ba, aba, baba, ababa}
        
        {a, a^3, ba, aba, baba, b^2aba}
        
        {a, a^3, ba, aba, baba, a^2baba}
        
        {a, a^3, ba, aba, baba, a(b^2)aba}
      - {a, a^3, a^5, ba, aba} (4 descendants)
        
        {a, a^3, a^5, ba, aba, a^3ba}
        
        {a, a^3, a^5, ba, aba, ab(a^3)}
        
        {a, a^3, a^5, ba, aba, ababa}
        
        {a, a^3, a^5, a^7, ba, aba}
      - {a, a^3, ba, aba, a^3ba} (5 descendants)
        
        {a, a^3, ba, aba, ab(a^3), a^3ba}
        
        {a, a^3, ba, aba, a^3ba, ababa}
        
        {a, a^3, ba, aba, a^3ba, b(a^3)ba}
        
        {a, a^3, ba, aba, a^3ba, a^5ba}
        
        {a, a^3, ba, aba, a^3ba, ab(a^3)ba}
      - {a, a^3, ba, aba, ab(a^3)} (1 descendant)
        
        {a, a^3, ba, aba, ab(a^3), ababa}
      - {a, a^3, ba, aba, ababa} (3 descendants)
        
        {a, a^3, ba, aba, ababa, bababa}
        
        {a, a^3, ba, aba, ababa, a^3baba}
        
        {a, a^3, ba, aba, ababa, abababa}
    - {a, a^3, ba, b^2a} (7 descendants)
      - {a, a^3, ba, b^2a, a^2ba} (8 descendants)
        
        {a, a^3, ba, b^2a, a(b^2)a, a^2ba}
        
        {a, a^3, ba, b(a^3), b^2a, a^2ba}
        
        {a, a^3, ba, b^2a, b^3a, a^2ba}
        
        {a, a^3, a^5, ba, b^2a, a^2ba}
        
        {a, a^3, ba, b^2a, a^2ba, a^2(b^2)a}
        
        {a, a^3, ba, b^2a, a(b^3)a, a^2ba}
        
        {a, a^3, ba, b^2a, a^2ba, b(a^2)ba}
        
        {a, a^3, ba, b^2a, a^2ba, a^4ba}
      - {a, a^3, ba, b^2a, a(b^2)a} (8 descendants)
        
        {a, a^3, ba, b(a^3), b^2a, a(b^2)a}
        
        {a, a^3, ba, b^2a, b^3a, a(b^2)a}
        
        {a, a^3, a^5, ba, b^2a, a(b^2)a}
        
        {a, a^3, ba, b^2a, a(b^2)a, a^2(b^2)a}
        
        {a, a^3, ba, b^2a, a(b^2)a, a(b^3)a}
        
        {a, a^3, ba, b^2a, a(b^2)a, ba(b^2)a}
        
        {a, a^3, ba, b^2a, a(b^2)a, a^3(b^2)a}
        
        {a, a^3, ba, b^2a, a(b^2)a, aba(b^2)a}
      - {a, a^3, ba, b(a^3), b^2a} (5 descendants)
        
        {a, a^3, ba, b(a^3), b^2a, b^3a}
        
        {a, a^3, a^5, ba, b(a^3), b^2a}
        
        {a, a^3, ba, b(a^3), b^2a, a^2(b^2)a}
        
        {a, a^3, ba, b(a^3), b^2a, a(b^3)a}
        
        {a, a^3, ba, b(a^3), b^2a, b^2(a^3)}
      - {a, a^3, ba, b^2a, b^3a} (6 descendants)
        
        {a, a^3, a^5, ba, b^2a, b^3a}
        
        {a, a^3, ba, b^2a, b^3a, a^2(b^2)a}
        
        {a, a^3, ba, b^2a, b^3a, a(b^3)a}
        
        {a, a^3, ba, b^2a, b^3a, b^4a}
        
        {a, a^3, ba, b^2a, b^3a, a^2(b^3)a}
        
        {a, a^3, ba, b^2a, b^3a, a(b^4)a}
      - {a, a^3, a^5, ba, b^2a} (3 descendants)
        
        {a, a^3, a^5, ba, b^2a, a^2(b^2)a}
        
        {a, a^3, a^5, ba, b^2a, a(b^3)a}
        
        {a, a^3, a^5, a^7, ba, b^2a}
      - {a, a^3, ba, b^2a, a^2(b^2)a} (3 descendants)
        
        {a, a^3, ba, b^2a, a(b^3)a, a^2(b^2)a}
        
        {a, a^3, ba, b^2a, a^2(b^2)a, b(a^2)(b^2)a}
        
        {a, a^3, ba, b^2a, a^2(b^2)a, a^4(b^2)a}
      - {a, a^3, ba, b^2a, a(b^3)a} (2 descendants)
        
        {a, a^3, ba, b^2a, a(b^3)a, ba(b^3)a}
        
        {a, a^3, ba, b^2a, a(b^3)a, a^3(b^3)a}
    - {a, a^3, ba, a^2ba} (5 descendants)
      - {a, a^3, ba, a(b^2)a, a^2ba} (6 descendants)
        
        {a, a^3, ba, b(a^3), a(b^2)a, a^2ba}
        
        {a, a^3, a^5, ba, a(b^2)a, a^2ba}
        
        {a, a^3, ba, a(b^2)a, a^2ba, b(a^2)ba}
        
        {a, a^3, ba, a(b^2)a, a^2ba, ba(b^2)a}
        
        {a, a^3, ba, a(b^2)a, a^2ba, a^4ba}
        
        {a, a^3, ba, a(b^2)a, a^2ba, a^3(b^2)a}
      - {a, a^3, ba, b(a^3), a^2ba} (4 descendants)
        
        {a, a^3, a^5, ba, b(a^3), a^2ba}
        
        {a, a^3, ba, b(a^3), a^2ba, b(a^2)ba}
        
        {a, a^3, ba, b(a^3), a^2ba, a^4ba}
        
        {a, a^3, ba, b(a^3), a^2ba, a^2b(a^3)}
      - {a, a^3, a^5, ba, a^2ba} (3 descendants)
        
        {a, a^3, a^5, ba, a^2ba, b(a^2)ba}
        
        {a, a^3, a^5, ba, a^2ba, a^4ba}
        
        {a, a^3, a^5, a^7, ba, a^2ba}
      - {a, a^3, ba, a^2ba, b(a^2)ba} (2 descendants)
        
        {a, a^3, ba, a^2ba, a^4ba, b(a^2)ba}
        
        {a, a^3, ba, a^2ba, b(a^2)ba, a^2b(a^2)ba}
      - {a, a^3, ba, a^2ba, a^4ba} (0 descendants)
    - {a, a^3, ba, a(b^2)a} (4 descendants)
      - {a, a^3, ba, b(a^3), a(b^2)a} (4 descendants)
        
        {a, a^3, a^5, ba, b(a^3), a(b^2)a}
        
        {a, a^3, ba, b(a^3), a(b^2)a, ba(b^2)a}
        
        {a, a^3, ba, b(a^3), a(b^2)a, a^3(b^2)a}
        
        {a, a^3, ba, b(a^3), a(b^2)a, a(b^2)(a^3)}
      - {a, a^3, a^5, ba, a(b^2)a} (3 descendants)
        
        {a, a^3, a^5, ba, a(b^2)a, ba(b^2)a}
        
        {a, a^3, a^5, ba, a(b^2)a, a^3(b^2)a}
        
        {a, a^3, a^5, a^7, ba, a(b^2)a}
      - {a, a^3, ba, a(b^2)a, ba(b^2)a} (2 descendants)
        
        {a, a^3, ba, a(b^2)a, a^3(b^2)a, ba(b^2)a}
        
        {a, a^3, ba, a(b^2)a, ba(b^2)a, a(b^2)a(b^2)a}
      - {a, a^3, ba, a(b^2)a, a^3(b^2)a} (0 descendants)
    - {a, a^3, ba, b(a^3)} (1 descendant)
      - {a, a^3, a^5, ba, b(a^3)} (2 descendants)
        
        {a, a^3, a^5, ba, b(a^3), b(a^5)}
        
        {a, a^3, a^5, a^7, ba, b(a^3)}
    - {a, a^3, a^5, ba} (1 descendant)
      - {a, a^3, a^5, a^7, ba} (1 descendant)
        
        {a, a^3, a^5, a^7, a^9, ba}
  - {a, ba, aba} (6 descendants)
    - {a, ba, b^2a, aba} (8 descendants)
      - {a, ba, b^2a, aba, a^2ba} (10 descendants)
        
        {a, ba, b^2a, aba, a(b^2)a, a^2ba}
        
        {a, ba, b^2a, aba, a^2ba, baba}
        
        {a, ba, b^2a, b^3a, aba, a^2ba}
        
        {a, ba, b^2a, aba, a^2ba, a^3ba}
        
        {a, ba, b^2a, aba, a^2ba, a^2(b^2)a}
        
        {a, ba, b^2a, aba, a^2ba, ababa}
        
        {a, ba, b^2a, aba, a(b^3)a, a^2ba}
        
        {a, ba, b^2a, aba, a^2ba, b(a^2)ba}
        
        {a, ba, b^2a, aba, a^2ba, a^4ba}
        
        {a, ba, b^2a, aba, a^2ba, ab(a^2)ba}
      - {a, ba, b^2a, aba, a(b^2)a} (9 descendants)
        
        {a, ba, b^2a, aba, a(b^2)a, baba}
        
        {a, ba, b^2a, b^3a, aba, a(b^2)a}
        
        {a, ba, b^2a, aba, a(b^2)a, a^3ba}
        
        {a, ba, b^2a, aba, a(b^2)a, a^2(b^2)a}
        
        {a, ba, b^2a, aba, a(b^2)a, ababa}
        
        {a, ba, b^2a, aba, a(b^2)a, a(b^3)a}
        
        {a, ba, b^2a, aba, a(b^2)a, ba(b^2)a}
        
        {a, ba, b^2a, aba, a(b^2)a, a^3(b^2)a}
        
        {a, ba, b^2a, aba, a(b^2)a, aba(b^2)a}
      - {a, ba, b^2a, aba, baba} (8 descendants)
        
        {a, ba, b^2a, b^3a, aba, baba}
        
        {a, ba, b^2a, aba, a^3ba, baba}
        
        {a, ba, b^2a, aba, a^2(b^2)a, baba}
        
        {a, ba, b^2a, aba, baba, ababa}
        
        {a, ba, b^2a, aba, a(b^3)a, baba}
        
        {a, ba, b^2a, aba, baba, b^2aba}
        
        {a, ba, b^2a, aba, baba, a^2baba}
        
        {a, ba, b^2a, aba, baba, a(b^2)aba}
      - {a, ba, b^2a, b^3a, aba} (7 descendants)
        
        {a, ba, b^2a, b^3a, aba, a^3ba}
        
        {a, ba, b^2a, b^3a, aba, a^2(b^2)a}
        
        {a, ba, b^2a, b^3a, aba, ababa}
        
        {a, ba, b^2a, b^3a, aba, a(b^3)a}
        
        {a, ba, b^2a, b^3a, b^4a, aba}
        
        {a, ba, b^2a, b^3a, aba, a^2(b^3)a}
        
        {a, ba, b^2a, b^3a, aba, a(b^4)a}
      - {a, ba, b^2a, aba, a^3ba} (5 descendants)
        
        {a, ba, b^2a, aba, a^2(b^2)a, a^3ba}
        
        {a, ba, b^2a, aba, a^3ba, ababa}
        
        {a, ba, b^2a, aba, a(b^3)a, a^3ba}
        
        {a, ba, b^2a, aba, a^3ba, b(a^3)ba}
        
        {a, ba, b^2a, aba, a^3ba, ab(a^3)ba}
      - {a, ba, b^2a, aba, a^2(b^2)a} (4 descendants)
        
        {a, ba, b^2a, aba, a^2(b^2)a, ababa}
        
        {a, ba, b^2a, aba, a(b^3)a, a^2(b^2)a}
        
        {a, ba, b^2a, aba, a^2(b^2)a, b(a^2)(b^2)a}
        
        {a, ba, b^2a, aba, a^2(b^2)a, ab(a^2)(b^2)a}
      - {a, ba, b^2a, aba, ababa} (3 descendants)
        
        {a, ba, b^2a, aba, a(b^3)a, ababa}
        
        {a, ba, b^2a, aba, ababa, bababa}
        
        {a, ba, b^2a, aba, ababa, abababa}
      - {a, ba, b^2a, aba, a(b^3)a} (2 descendants)
        
        {a, ba, b^2a, aba, a(b^3)a, ba(b^3)a}
        
        {a, ba, b^2a, aba, a(b^3)a, aba(b^3)a}
    - {a, ba, aba, a^2ba} (7 descendants)
      - {a, ba, aba, a(b^2)a, a^2ba} (8 descendants)
        
        {a, ba, aba, a(b^2)a, a^2ba, baba}
        
        {a, ba, aba, a(b^2)a, a^2ba, a^3ba}
        
        {a, ba, aba, a(b^2)a, a^2ba, ababa}
        
        {a, ba, aba, a(b^2)a, a^2ba, b(a^2)ba}
        
        {a, ba, aba, a(b^2)a, a^2ba, ba(b^2)a}
        
        {a, ba, aba, a(b^2)a, a^2ba, a^4ba}
        
        {a, ba, aba, a(b^2)a, a^2ba, ab(a^2)ba}
        
        {a, ba, aba, a(b^2)a, a^2ba, aba(b^2)a}
      - {a, ba, aba, a^2ba, baba} (8 descendants)
        
        {a, ba, aba, a^2ba, a^3ba, baba}
        
        {a, ba, aba, a^2ba, baba, ababa}
        
        {a, ba, aba, a^2ba, baba, b(a^2)ba}
        
        {a, ba, aba, a^2ba, baba, b^2aba}
        
        {a, ba, aba, a^2ba, a^4ba, baba}
        
        {a, ba, aba, a^2ba, baba, a^2baba}
        
        {a, ba, aba, a^2ba, baba, ab(a^2)ba}
        
        {a, ba, aba, a^2ba, baba, a(b^2)aba}
      - {a, ba, aba, a^2ba, a^3ba} (7 descendants)
        
        {a, ba, aba, a^2ba, a^3ba, ababa}
        
        {a, ba, aba, a^2ba, a^3ba, b(a^2)ba}
        
        {a, ba, aba, a^2ba, a^3ba, a^4ba}
        
        {a, ba, aba, a^2ba, a^3ba, ab(a^2)ba}
        
        {a, ba, aba, a^2ba, a^3ba, b(a^3)ba}
        
        {a, ba, aba, a^2ba, a^3ba, a^5ba}
        
        {a, ba, aba, a^2ba, a^3ba, ab(a^3)ba}
      - {a, ba, aba, a^2ba, ababa} (5 descendants)
        
        {a, ba, aba, a^2ba, b(a^2)ba, ababa}
        
        {a, ba, aba, a^2ba, a^4ba, ababa}
        
        {a, ba, aba, a^2ba, ababa, ab(a^2)ba}
        
        {a, ba, aba, a^2ba, ababa, bababa}
        
        {a, ba, aba, a^2ba, ababa, abababa}
      - {a, ba, aba, a^2ba, b(a^2)ba} (5 descendants)
        
        {a, ba, aba, a^2ba, a^4ba, b(a^2)ba}
        
        {a, ba, aba, a^2ba, b(a^2)ba, ab(a^2)ba}
        
        {a, ba, aba, a^2ba, b(a^2)ba, b^2(a^2)ba}
        
        {a, ba, aba, a^2ba, b(a^2)ba, a^2b(a^2)ba}
        
        {a, ba, aba, a^2ba, b(a^2)ba, a(b^2)(a^2)ba}
      - {a, ba, aba, a^2ba, a^4ba} (3 descendants)
        
        {a, ba, aba, a^2ba, a^4ba, ab(a^2)ba}
        
        {a, ba, aba, a^2ba, a^4ba, b(a^4)ba}
        
        {a, ba, aba, a^2ba, a^4ba, ab(a^4)ba}
      - {a, ba, aba, a^2ba, ab(a^2)ba} (2 descendants)
        
        {a, ba, aba, a^2ba, ab(a^2)ba, bab(a^2)ba}
        
        {a, ba, aba, a^2ba, ab(a^2)ba, abab(a^2)ba}
    - {a, ba, aba, a(b^2)a} (5 descendants)
      - {a, ba, aba, a(b^2)a, baba} (7 descendants)
        
        {a, ba, aba, a(b^2)a, a^3ba, baba}
        
        {a, ba, aba, a(b^2)a, baba, ababa}
        
        {a, ba, aba, a(b^2)a, baba, ba(b^2)a}
        
        {a, ba, aba, a(b^2)a, baba, b^2aba}
        
        {a, ba, aba, a(b^2)a, baba, a^2baba}
        
        {a, ba, aba, a(b^2)a, baba, aba(b^2)a}
        
        {a, ba, aba, a(b^2)a, baba, a(b^2)aba}
      - {a, ba, aba, a(b^2)a, a^3ba} (5 descendants)
        
        {a, ba, aba, a(b^2)a, a^3ba, ababa}
        
        {a, ba, aba, a(b^2)a, a^3ba, ba(b^2)a}
        
        {a, ba, aba, a(b^2)a, a^3ba, aba(b^2)a}
        
        {a, ba, aba, a(b^2)a, a^3ba, b(a^3)ba}
        
        {a, ba, aba, a(b^2)a, a^3ba, ab(a^3)ba}
      - {a, ba, aba, a(b^2)a, ababa} (4 descendants)
        
        {a, ba, aba, a(b^2)a, ba(b^2)a, ababa}
        
        {a, ba, aba, a(b^2)a, ababa, aba(b^2)a}
        
        {a, ba, aba, a(b^2)a, ababa, bababa}
        
        {a, ba, aba, a(b^2)a, ababa, abababa}
      - {a, ba, aba, a(b^2)a, ba(b^2)a} (2 descendants)
        
        {a, ba, aba, a(b^2)a, ba(b^2)a, aba(b^2)a}
        
        {a, ba, aba, a(b^2)a, ba(b^2)a, a(b^2)a(b^2)a}
      - {a, ba, aba, a(b^2)a, aba(b^2)a} (0 descendants)
    - {a, ba, aba, baba} (5 descendants)
      - {a, ba, aba, a^3ba, baba} (6 descendants)
        
        {a, ba, aba, a^3ba, baba, ababa}
        
        {a, ba, aba, a^3ba, baba, b^2aba}
        
        {a, ba, aba, a^3ba, baba, a^2baba}
        
        {a, ba, aba, a^3ba, baba, a(b^2)aba}
        
        {a, ba, aba, a^3ba, baba, b(a^3)ba}
        
        {a, ba, aba, a^3ba, baba, ab(a^3)ba}
      - {a, ba, aba, baba, ababa} (6 descendants)
        
        {a, ba, aba, baba, b^2aba, ababa}
        
        {a, ba, aba, baba, ababa, a^2baba}
        
        {a, ba, aba, baba, ababa, a(b^2)aba}
        
        {a, ba, aba, baba, ababa, bababa}
        
        {a, ba, aba, baba, ababa, a^3baba}
        
        {a, ba, aba, baba, ababa, abababa}
      - {a, ba, aba, baba, b^2aba} (5 descendants)
        
        {a, ba, aba, baba, b^2aba, a^2baba}
        
        {a, ba, aba, baba, b^2aba, a(b^2)aba}
        
        {a, ba, aba, baba, b^2aba, b^3aba}
        
        {a, ba, aba, baba, b^2aba, a^2(b^2)aba}
        
        {a, ba, aba, baba, b^2aba, a(b^3)aba}
      - {a, ba, aba, baba, a^2baba} (3 descendants)
        
        {a, ba, aba, baba, a(b^2)aba, a^2baba}
        
        {a, ba, aba, baba, a^2baba, b(a^2)baba}
        
        {a, ba, aba, baba, a^2baba, ab(a^2)baba}
      - {a, ba, aba, baba, a(b^2)aba} (2 descendants)
        
        {a, ba, aba, baba, a(b^2)aba, ba(b^2)aba}
        
        {a, ba, aba, baba, a(b^2)aba, aba(b^2)aba}
    - {a, ba, aba, a^3ba} (3 descendants)
      - {a, ba, aba, a^3ba, ababa} (4 descendants)
        
        {a, ba, aba, a^3ba, b(a^3)ba, ababa}
        
        {a, ba, aba, a^3ba, ababa, bababa}
        
        {a, ba, aba, a^3ba, ababa, ab(a^3)ba}
        
        {a, ba, aba, a^3ba, ababa, abababa}
      - {a, ba, aba, a^3ba, b(a^3)ba} (1 descendant)
        
        {a, ba, aba, a^3ba, b(a^3)ba, ab(a^3)ba}
      - {a, ba, aba, a^3ba, ab(a^3)ba} (0 descendants)
    - {a, ba, aba, ababa} (2 descendants)
      - {a, ba, aba, ababa, bababa} (1 descendant)
        
        {a, ba, aba, ababa, bababa, abababa}
      - {a, ba, aba, ababa, abababa} (1 descendant)
        
        {a, ba, aba, ababa, abababa, ababababa}
  - {a, ba, b^2a} (5 descendants)
    - {a, ba, b^2a, a^2ba} (5 descendants)
      - {a, ba, b^2a, a(b^2)a, a^2ba} (7 descendants)
        
        {a, ba, b^2a, b^3a, a(b^2)a, a^2ba}
        
        {a, ba, b^2a, a(b^2)a, a^2ba, a^2(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a(b^3)a, a^2ba}
        
        {a, ba, b^2a, a(b^2)a, a^2ba, b(a^2)ba}
        
        {a, ba, b^2a, a(b^2)a, a^2ba, ba(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a^2ba, a^3(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a^2ba, aba(b^2)a}
      - {a, ba, b^2a, b^3a, a^2ba} (6 descendants)
        
        {a, ba, b^2a, b^3a, a^2ba, a^2(b^2)a}
        
        {a, ba, b^2a, b^3a, a(b^3)a, a^2ba}
        
        {a, ba, b^2a, b^3a, a^2ba, b(a^2)ba}
        
        {a, ba, b^2a, b^3a, b^4a, a^2ba}
        
        {a, ba, b^2a, b^3a, a^2ba, a^2(b^3)a}
        
        {a, ba, b^2a, b^3a, a(b^4)a, a^2ba}
      - {a, ba, b^2a, a^2ba, a^2(b^2)a} (3 descendants)
        
        {a, ba, b^2a, a(b^3)a, a^2ba, a^2(b^2)a}
        
        {a, ba, b^2a, a^2ba, a^2(b^2)a, b(a^2)ba}
        
        {a, ba, b^2a, a^2ba, a^2(b^2)a, b(a^2)(b^2)a}
      - {a, ba, b^2a, a(b^3)a, a^2ba} (2 descendants)
        
        {a, ba, b^2a, a(b^3)a, a^2ba, b(a^2)ba}
        
        {a, ba, b^2a, a(b^3)a, a^2ba, ba(b^3)a}
      - {a, ba, b^2a, a^2ba, b(a^2)ba} (2 descendants)
        
        {a, ba, b^2a, a^2ba, b(a^2)ba, b^2(a^2)ba}
        
        {a, ba, b^2a, a^2ba, b(a^2)ba, a^2b(a^2)ba}
    - {a, ba, b^2a, a(b^2)a} (6 descendants)
      - {a, ba, b^2a, b^3a, a(b^2)a} (8 descendants)
        
        {a, ba, b^2a, b^3a, a(b^2)a, a^2(b^2)a}
        
        {a, ba, b^2a, b^3a, a(b^2)a, a(b^3)a}
        
        {a, ba, b^2a, b^3a, a(b^2)a, ba(b^2)a}
        
        {a, ba, b^2a, b^3a, b^4a, a(b^2)a}
        
        {a, ba, b^2a, b^3a, a(b^2)a, a^3(b^2)a}
        
        {a, ba, b^2a, b^3a, a(b^2)a, a^2(b^3)a}
        
        {a, ba, b^2a, b^3a, a(b^2)a, aba(b^2)a}
        
        {a, ba, b^2a, b^3a, a(b^2)a, a(b^4)a}
      - {a, ba, b^2a, a(b^2)a, a^2(b^2)a} (7 descendants)
        
        {a, ba, b^2a, a(b^2)a, a(b^3)a, a^2(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a^2(b^2)a, ba(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a^2(b^2)a, a^3(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a^2(b^2)a, aba(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a^2(b^2)a, b(a^2)(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a^2(b^2)a, a^4(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a^2(b^2)a, ab(a^2)(b^2)a}
      - {a, ba, b^2a, a(b^2)a, a(b^3)a} (4 descendants)
        
        {a, ba, b^2a, a(b^2)a, a(b^3)a, ba(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a(b^3)a, a^3(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a(b^3)a, aba(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a(b^3)a, ba(b^3)a}
      - {a, ba, b^2a, a(b^2)a, ba(b^2)a} (5 descendants)
        
        {a, ba, b^2a, a(b^2)a, a^3(b^2)a, ba(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, ba(b^2)a, aba(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, ba(b^2)a, b^2a(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, ba(b^2)a, a^2ba(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, ba(b^2)a, a(b^2)a(b^2)a}
      - {a, ba, b^2a, a(b^2)a, a^3(b^2)a} (2 descendants)
        
        {a, ba, b^2a, a(b^2)a, a^3(b^2)a, aba(b^2)a}
        
        {a, ba, b^2a, a(b^2)a, a^3(b^2)a, b(a^3)(b^2)a}
      - {a, ba, b^2a, a(b^2)a, aba(b^2)a} (1 descendant)
        
        {a, ba, b^2a, a(b^2)a, aba(b^2)a, baba(b^2)a}
    - {a, ba, b^2a, b^3a} (5 descendants)
      - {a, ba, b^2a, b^3a, a^2(b^2)a} (5 descendants)
        
        {a, ba, b^2a, b^3a, a(b^3)a, a^2(b^2)a}
        
        {a, ba, b^2a, b^3a, b^4a, a^2(b^2)a}
        
        {a, ba, b^2a, b^3a, a^2(b^2)a, a^2(b^3)a}
        
        {a, ba, b^2a, b^3a, a(b^4)a, a^2(b^2)a}
        
        {a, ba, b^2a, b^3a, a^2(b^2)a, b(a^2)(b^2)a}
      - {a, ba, b^2a, b^3a, a(b^3)a} (6 descendants)
        
        {a, ba, b^2a, b^3a, b^4a, a(b^3)a}
        
        {a, ba, b^2a, b^3a, a(b^3)a, a^2(b^3)a}
        
        {a, ba, b^2a, b^3a, a(b^3)a, a(b^4)a}
        
        {a, ba, b^2a, b^3a, a(b^3)a, ba(b^3)a}
        
        {a, ba, b^2a, b^3a, a(b^3)a, a^3(b^3)a}
        
        {a, ba, b^2a, b^3a, a(b^3)a, aba(b^3)a}
      - {a, ba, b^2a, b^3a, b^4a} (5 descendants)
        
        {a, ba, b^2a, b^3a, b^4a, a^2(b^3)a}
        
        {a, ba, b^2a, b^3a, b^4a, a(b^4)a}
        
        {a, ba, b^2a, b^3a, b^4a, b^5a}
        
        {a, ba, b^2a, b^3a, b^4a, a^2(b^4)a}
        
        {a, ba, b^2a, b^3a, b^4a, a(b^5)a}
      - {a, ba, b^2a, b^3a, a^2(b^3)a} (2 descendants)
        
        {a, ba, b^2a, b^3a, a(b^4)a, a^2(b^3)a}
        
        {a, ba, b^2a, b^3a, a^2(b^3)a, b(a^2)(b^3)a}
      - {a, ba, b^2a, b^3a, a(b^4)a} (1 descendant)
        
        {a, ba, b^2a, b^3a, a(b^4)a, ba(b^4)a}
    - {a, ba, b^2a, a^2(b^2)a} (2 descendants)
      - {a, ba, b^2a, a(b^3)a, a^2(b^2)a} (2 descendants)
        
        {a, ba, b^2a, a(b^3)a, a^2(b^2)a, b(a^2)(b^2)a}
        
        {a, ba, b^2a, a(b^3)a, a^2(b^2)a, ba(b^3)a}
      - {a, ba, b^2a, a^2(b^2)a, b(a^2)(b^2)a} (1 descendant)
        
        {a, ba, b^2a, a^2(b^2)a, b(a^2)(b^2)a, b^2(a^2)(b^2)a}
    - {a, ba, b^2a, a(b^3)a} (1 descendant)
      - {a, ba, b^2a, a(b^3)a, ba(b^3)a} (1 descendant)
        
        {a, ba, b^2a, a(b^3)a, ba(b^3)a, b^2a(b^3)a}
  - {a, ba, a^2ba} (2 descendants)
    - {a, ba, a(b^2)a, a^2ba} (2 descendants)
      - {a, ba, a(b^2)a, a^2ba, b(a^2)ba} (3 descendants)
        
        {a, ba, a(b^2)a, a^2ba, ba(b^2)a, b(a^2)ba}
        
        {a, ba, a(b^2)a, a^2ba, b(a^2)ba, a^2b(a^2)ba}
        
        {a, ba, a(b^2)a, a^2ba, b(a^2)ba, a(b^2)(a^2)ba}
      - {a, ba, a(b^2)a, a^2ba, ba(b^2)a} (2 descendants)
        
        {a, ba, a(b^2)a, a^2ba, ba(b^2)a, a^2ba(b^2)a}
        
        {a, ba, a(b^2)a, a^2ba, ba(b^2)a, a(b^2)a(b^2)a}
    - {a, ba, a^2ba, b(a^2)ba} (1 descendant)
      - {a, ba, a^2ba, b(a^2)ba, a^2b(a^2)ba} (1 descendant)
        
        {a, ba, a^2ba, b(a^2)ba, a^2b(a^2)ba, b(a^2)b(a^2)ba}
  - {a, ba, a(b^2)a} (1 descendant)
    - {a, ba, a(b^2)a, ba(b^2)a} (1 descendant)
      - {a, ba, a(b^2)a, ba(b^2)a, a(b^2)a(b^2)a} (1 descendant)
        
        {a, ba, a(b^2)a, ba(b^2)a, a(b^2)a(b^2)a, ba(b^2)a(b^2)a}
- {a, a^3} (2 descendants)
  - {a, a^3, aba} (4 descendants)
    - {a, a^3, a^5, aba} (4 descendants)
      - {a, a^3, a^5, aba, a^3ba} (4 descendants)
        
        {a, a^3, a^5, aba, ab(a^3), a^3ba}
        
        {a, a^3, a^5, aba, a^3ba, ababa}
        
        {a, a^3, a^5, a^7, aba, a^3ba}
        
        {a, a^3, a^5, aba, a^3ba, a^5ba}
      - {a, a^3, a^5, aba, ab(a^3)} (3 descendants)
        
        {a, a^3, a^5, aba, ab(a^3), ababa}
        
        {a, a^3, a^5, a^7, aba, ab(a^3)}
        
        {a, a^3, a^5, aba, ab(a^3), ab(a^5)}
      - {a, a^3, a^5, aba, ababa} (2 descendants)
        
        {a, a^3, a^5, a^7, aba, ababa}
        
        {a, a^3, a^5, aba, ababa, abababa}
      - {a, a^3, a^5, a^7, aba} (1 descendant)
        
        {a, a^3, a^5, a^7, a^9, aba}
    - {a, a^3, aba, a^3ba} (2 descendants)
      - {a, a^3, aba, ab(a^3), a^3ba} (3 descendants)
        
        {a, a^3, aba, ab(a^3), a^3ba, ababa}
        
        {a, a^3, aba, ab(a^3), a^3ba, a^3b(a^3)}
        
        {a, a^3, aba, ab(a^3), a^3ba, ab(a^3)ba}
      - {a, a^3, aba, a^3ba, ababa} (2 descendants)
        
        {a, a^3, aba, a^3ba, ababa, a^3baba}
        
        {a, a^3, aba, a^3ba, ababa, abababa}
    - {a, a^3, aba, ab(a^3)} (1 descendant)
      - {a, a^3, aba, ab(a^3), ababa} (2 descendants)
        
        {a, a^3, aba, ab(a^3), ababa, abab(a^3)}
        
        {a, a^3, aba, ab(a^3), ababa, abababa}
    - {a, a^3, aba, ababa} (1 descendant)
      - {a, a^3, aba, ababa, abababa} (1 descendant)
        
        {a, a^3, aba, ababa, abababa, ababababa}
  - {a, a^3, a^5} (1 descendant)
    - {a, a^3, a^5, a^7} (1 descendant)
      - {a, a^3, a^5, a^7, a^9} (1 descendant)
        
        {a, a^3, a^5, a^7, a^9, a^11}
- {a, aba} (1 descendant)
  - {a, aba, ababa} (1 descendant)
    - {a, aba, ababa, abababa} (1 descendant)
      - {a, aba, ababa, abababa, ababababa} (1 descendant)
        
        {a, aba, ababa, abababa, ababababa, abababababa}
{b} (5 descendants)
- {b, ab} (7 descendants)
  - {b, ab, ba} (11 descendants)
    - {b, b^2, ab, ba} (19 descendants)
      - {b, b^2, ab, ba, a^2b} (23 descendants)
        
        {b, b^2, ab, ba, a^2b, aba}
        
        {b, b^2, ab, a(b^2), ba, a^2b}
        
        {b, b^2, ab, ba, b(a^2), a^2b}
        
        {b, b^2, ab, ba, a^2b, bab}
        
        {b, b^2, ab, ba, a^2b, b^2a}
        
        {b, b^2, b^3, ab, ba, a^2b}
        
        {b, b^2, ab, ba, a^2b, a^3b}
        
        {b, b^2, ab, ba, a^2b, b(a^2)b}
        
        {b, b^2, ab, ba, a^2b, ba(b^2)}
        
        {b, b^2, ab, ba, a^2b, b^2ab}
        
        {b, b^2, b^4, ab, ba, a^2b}
        
        {b, b^2, ab, ba, a^2b, b(a^3)b}
        
        {b, b^2, ab, ba, a^2b, b(a^2)(b^2)}
        
        {b, b^2, ab, ba, a^2b, babab}
        
        {b, b^2, ab, ba, a^2b, ba(b^3)}
        
        {b, b^2, ab, ba, a^2b, b^2(a^2)b}
        
        {b, b^2, ab, ba, a^2b, b^2a(b^2)}
        
        {b, b^2, ab, ba, a^2b, b^3ab}
        
        {b, b^2, b^5, ab, ba, a^2b}
        
        {b, b^2, ab, ba, a^2b, b(a^4)b}
        
        {b, b^2, ab, ba, a^2b, bab(a^2)b}
        
        {b, b^2, ab, ba, a^2b, b^2(a^3)b}
        
        {b, b^2, ab, ba, a^2b, b^3(a^2)b}
      - {b, b^2, ab, ba, aba} (17 descendants)
        
        {b, b^2, ab, a(b^2), ba, aba}
        
        {b, b^2, ab, ba, b(a^2), aba}
        
        {b, b^2, ab, ba, aba, bab}
        
        {b, b^2, ab, ba, b^2a, aba}
        
        {b, b^2, b^3, ab, ba, aba}
        
        {b, b^2, ab, ba, aba, b(a^2)b}
        
        {b, b^2, ab, ba, aba, ba(b^2)}
        
        {b, b^2, ab, ba, aba, b^2ab}
        
        {b, b^2, b^4, ab, ba, aba}
        
        {b, b^2, ab, ba, aba, b(a^3)b}
        
        {b, b^2, ab, ba, aba, b(a^2)(b^2)}
        
        {b, b^2, ab, ba, aba, babab}
        
        {b, b^2, ab, ba, aba, ba(b^3)}
        
        {b, b^2, ab, ba, aba, b^2(a^2)b}
        
        {b, b^2, ab, ba, aba, b^2a(b^2)}
        
        {b, b^2, ab, ba, aba, b^3ab}
        
        {b, b^2, b^5, ab, ba, aba}
      - {b, b^2, ab, a(b^2), ba} (21 descendants)
        
        {b, b^2, ab, a(b^2), ba, b(a^2)}
        
        {b, b^2, ab, a(b^2), ba, bab}
        
        {b, b^2, ab, a(b^2), ba, b^2a}
        
        {b, b^2, b^3, ab, a(b^2), ba}
        
        {b, b^2, ab, a(b^2), ba, a^2(b^2)}
        
        {b, b^2, ab, a(b^2), ba, b(a^2)b}
        
        {b, b^2, ab, a(b^2), ba, ba(b^2)}
        
        {b, b^2, ab, a(b^2), ba, b^2ab}
        
        {b, b^2, b^4, ab, a(b^2), ba}
        
        {b, b^2, ab, a(b^2), ba, b(a^3)b}
        
        {b, b^2, ab, a(b^2), ba, b(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), ba, babab}
        
        {b, b^2, ab, a(b^2), ba, ba(b^3)}
        
        {b, b^2, ab, a(b^2), ba, b^2(a^2)b}
        
        {b, b^2, ab, a(b^2), ba, b^2a(b^2)}
        
        {b, b^2, ab, a(b^2), ba, b^3ab}
        
        {b, b^2, b^5, ab, a(b^2), ba}
        
        {b, b^2, ab, a(b^2), ba, b(a^3)(b^2)}
        
        {b, b^2, ab, a(b^2), ba, baba(b^2)}
        
        {b, b^2, ab, a(b^2), ba, b^2(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), ba, b^3a(b^2)}
      - {b, b^2, ab, ba, b(a^2)} (20 descendants)
        
        {b, b^2, ab, ba, b(a^2), bab}
        
        {b, b^2, ab, ba, b(a^2), b^2a}
        
        {b, b^2, b^3, ab, ba, b(a^2)}
        
        {b, b^2, ab, ba, b(a^2), b(a^3)}
        
        {b, b^2, ab, ba, b(a^2), b(a^2)b}
        
        {b, b^2, ab, ba, b(a^2), ba(b^2)}
        
        {b, b^2, ab, ba, b(a^2), b^2ab}
        
        {b, b^2, b^4, ab, ba, b(a^2)}
        
        {b, b^2, ab, ba, b(a^2), b(a^3)b}
        
        {b, b^2, ab, ba, b(a^2), b(a^2)(b^2)}
        
        {b, b^2, ab, ba, b(a^2), babab}
        
        {b, b^2, ab, ba, b(a^2), ba(b^3)}
        
        {b, b^2, ab, ba, b(a^2), b^2(a^2)b}
        
        {b, b^2, ab, ba, b(a^2), b^2a(b^2)}
        
        {b, b^2, ab, ba, b(a^2), b^3ab}
        
        {b, b^2, b^5, ab, ba, b(a^2)}
        
        {b, b^2, ab, ba, b(a^2), b(a^4)b}
        
        {b, b^2, ab, ba, b(a^2), b(a^3)(b^2)}
        
        {b, b^2, ab, ba, b(a^2), b(a^2)bab}
        
        {b, b^2, ab, ba, b(a^2), b(a^2)(b^3)}
      - {b, b^2, ab, ba, bab} (25 descendants)
        
        {b, b^2, ab, ba, b^2a, bab}
        
        {b, b^2, b^3, ab, ba, bab}
        
        {b, b^2, ab, ba, bab, abab}
        
        {b, b^2, ab, ba, bab, b(a^2)b}
        
        {b, b^2, ab, ba, bab, baba}
        
        {b, b^2, ab, ba, bab, ba(b^2)}
        
        {b, b^2, ab, ba, bab, b^2ab}
        
        {b, b^2, b^4, ab, ba, bab}
        
        {b, b^2, ab, ba, bab, b(a^3)b}
        
        {b, b^2, ab, ba, bab, b(a^2)(b^2)}
        
        {b, b^2, ab, ba, bab, babab}
        
        {b, b^2, ab, ba, bab, ba(b^3)}
        
        {b, b^2, ab, ba, bab, b^2(a^2)b}
        
        {b, b^2, ab, ba, bab, b^2a(b^2)}
        
        {b, b^2, ab, ba, bab, b^3ab}
        
        {b, b^2, b^5, ab, ba, bab}
        
        {b, b^2, ab, ba, bab, b(a^2)bab}
        
        {b, b^2, ab, ba, bab, bab(a^2)b}
        
        {b, b^2, ab, ba, bab, baba(b^2)}
        
        {b, b^2, ab, ba, bab, ba(b^2)ab}
        
        {b, b^2, ab, ba, bab, ba(b^4)}
        
        {b, b^2, ab, ba, bab, b^2abab}
        
        {b, b^2, ab, ba, bab, b^4ab}
        
        {b, b^2, ab, ba, bab, bababab}
        
        {b, b^2, ab, ba, bab, ba(b^3)ab}
      - {b, b^2, ab, ba, b^2a} (18 descendants)
        
        {b, b^2, b^3, ab, ba, b^2a}
        
        {b, b^2, ab, ba, b^2a, b(a^2)b}
        
        {b, b^2, ab, ba, b^2a, ba(b^2)}
        
        {b, b^2, ab, ba, b^2a, b^2(a^2)}
        
        {b, b^2, ab, ba, b^2a, b^2ab}
        
        {b, b^2, b^4, ab, ba, b^2a}
        
        {b, b^2, ab, ba, b^2a, b(a^3)b}
        
        {b, b^2, ab, ba, b^2a, b(a^2)(b^2)}
        
        {b, b^2, ab, ba, b^2a, babab}
        
        {b, b^2, ab, ba, b^2a, ba(b^3)}
        
        {b, b^2, ab, ba, b^2a, b^2(a^2)b}
        
        {b, b^2, ab, ba, b^2a, b^2a(b^2)}
        
        {b, b^2, ab, ba, b^2a, b^3ab}
        
        {b, b^2, b^5, ab, ba, b^2a}
        
        {b, b^2, ab, ba, b^2a, b^2(a^3)b}
        
        {b, b^2, ab, ba, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, ab, ba, b^2a, b^2abab}
        
        {b, b^2, ab, ba, b^2a, b^2a(b^3)}
      - {b, b^2, b^3, ab, ba} (23 descendants)
        
        {b, b^2, b^3, ab, a(b^3), ba}
        
        {b, b^2, b^3, ab, ba, b(a^2)b}
        
        {b, b^2, b^3, ab, ba, ba(b^2)}
        
        {b, b^2, b^3, ab, ba, b^2ab}
        
        {b, b^2, b^3, ab, ba, b^3a}
        
        {b, b^2, b^3, b^4, ab, ba}
        
        {b, b^2, b^3, ab, ba, b(a^3)b}
        
        {b, b^2, b^3, ab, ba, b(a^2)(b^2)}
        
        {b, b^2, b^3, ab, ba, babab}
        
        {b, b^2, b^3, ab, ba, ba(b^3)}
        
        {b, b^2, b^3, ab, ba, b^2(a^2)b}
        
        {b, b^2, b^3, ab, ba, b^2a(b^2)}
        
        {b, b^2, b^3, ab, ba, b^3ab}
        
        {b, b^2, b^3, b^5, ab, ba}
        
        {b, b^2, b^3, ab, ba, b(a^2)(b^3)}
        
        {b, b^2, b^3, ab, ba, ba(b^4)}
        
        {b, b^2, b^3, ab, ba, b^2a(b^3)}
        
        {b, b^2, b^3, ab, ba, b^3(a^2)b}
        
        {b, b^2, b^3, ab, ba, b^3a(b^2)}
        
        {b, b^2, b^3, ab, ba, b^4ab}
        
        {b, b^2, b^3, b^6, ab, ba}
        
        {b, b^2, b^3, ab, ba, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, ba}
      - {b, b^2, ab, ba, b(a^2)b} (14 descendants)
        
        {b, b^2, ab, ba, ba(b^2), b(a^2)b}
        
        {b, b^2, ab, ba, b(a^2)b, b^2ab}
        
        {b, b^2, b^4, ab, ba, b(a^2)b}
        
        {b, b^2, ab, ba, b(a^2)b, ab(a^2)b}
        
        {b, b^2, ab, ba, b(a^2)b, b(a^3)b}
        
        {b, b^2, ab, ba, b(a^2)b, b(a^2)ba}
        
        {b, b^2, ab, ba, b(a^2)b, b(a^2)(b^2)}
        
        {b, b^2, ab, ba, b(a^2)b, babab}
        
        {b, b^2, ab, ba, ba(b^3), b(a^2)b}
        
        {b, b^2, ab, ba, b(a^2)b, b^2(a^2)b}
        
        {b, b^2, ab, ba, b(a^2)b, b^2a(b^2)}
        
        {b, b^2, ab, ba, b(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, ba, b(a^2)b}
        
        {b, b^2, ab, ba, b(a^2)b, b(a^2)b(a^2)b}
      - {b, b^2, ab, ba, ba(b^2)} (13 descendants)
        
        {b, b^2, ab, ba, ba(b^2), b^2ab}
        
        {b, b^2, b^4, ab, ba, ba(b^2)}
        
        {b, b^2, ab, ba, ba(b^2), aba(b^2)}
        
        {b, b^2, ab, ba, ba(b^2), b(a^3)b}
        
        {b, b^2, ab, ba, ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, ab, ba, ba(b^2), babab}
        
        {b, b^2, ab, ba, ba(b^2), ba(b^2)a}
        
        {b, b^2, ab, ba, ba(b^2), ba(b^3)}
        
        {b, b^2, ab, ba, ba(b^2), b^2(a^2)b}
        
        {b, b^2, ab, ba, ba(b^2), b^2a(b^2)}
        
        {b, b^2, ab, ba, ba(b^2), b^3ab}
        
        {b, b^2, b^5, ab, ba, ba(b^2)}
        
        {b, b^2, ab, ba, ba(b^2), ba(b^2)a(b^2)}
      - {b, b^2, ab, ba, b^2ab} (12 descendants)
        
        {b, b^2, b^4, ab, ba, b^2ab}
        
        {b, b^2, ab, ba, b^2ab, a(b^2)ab}
        
        {b, b^2, ab, ba, b(a^3)b, b^2ab}
        
        {b, b^2, ab, ba, b(a^2)(b^2), b^2ab}
        
        {b, b^2, ab, ba, b^2ab, babab}
        
        {b, b^2, ab, ba, ba(b^3), b^2ab}
        
        {b, b^2, ab, ba, b^2ab, b^2(a^2)b}
        
        {b, b^2, ab, ba, b^2ab, b^2aba}
        
        {b, b^2, ab, ba, b^2ab, b^2a(b^2)}
        
        {b, b^2, ab, ba, b^2ab, b^3ab}
        
        {b, b^2, b^5, ab, ba, b^2ab}
        
        {b, b^2, ab, ba, b^2ab, b^2a(b^2)ab}
      - {b, b^2, b^4, ab, ba} (11 descendants)
        
        {b, b^2, b^4, ab, a(b^4), ba}
        
        {b, b^2, b^4, ab, ba, b(a^3)b}
        
        {b, b^2, b^4, ab, ba, b(a^2)(b^2)}
        
        {b, b^2, b^4, ab, ba, babab}
        
        {b, b^2, b^4, ab, ba, ba(b^3)}
        
        {b, b^2, b^4, ab, ba, b^2(a^2)b}
        
        {b, b^2, b^4, ab, ba, b^2a(b^2)}
        
        {b, b^2, b^4, ab, ba, b^3ab}
        
        {b, b^2, b^4, ab, ba, b^4a}
        
        {b, b^2, b^4, b^5, ab, ba}
        
        {b, b^2, b^4, b^7, ab, ba}
      - {b, b^2, ab, ba, b(a^3)b} (7 descendants)
        
        {b, b^2, ab, ba, b(a^2)(b^2), b(a^3)b}
        
        {b, b^2, ab, ba, b(a^3)b, babab}
        
        {b, b^2, ab, ba, ba(b^3), b(a^3)b}
        
        {b, b^2, ab, ba, b(a^3)b, b^2(a^2)b}
        
        {b, b^2, ab, ba, b(a^3)b, b^2a(b^2)}
        
        {b, b^2, ab, ba, b(a^3)b, b^3ab}
        
        {b, b^2, b^5, ab, ba, b(a^3)b}
      - {b, b^2, ab, ba, b(a^2)(b^2)} (6 descendants)
        
        {b, b^2, ab, ba, b(a^2)(b^2), babab}
        
        {b, b^2, ab, ba, ba(b^3), b(a^2)(b^2)}
        
        {b, b^2, ab, ba, b(a^2)(b^2), b^2(a^2)b}
        
        {b, b^2, ab, ba, b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, ab, ba, b(a^2)(b^2), b^3ab}
        
        {b, b^2, b^5, ab, ba, b(a^2)(b^2)}
      - {b, b^2, ab, ba, babab} (5 descendants)
        
        {b, b^2, ab, ba, ba(b^3), babab}
        
        {b, b^2, ab, ba, b^2(a^2)b, babab}
        
        {b, b^2, ab, ba, b^2a(b^2), babab}
        
        {b, b^2, ab, ba, b^3ab, babab}
        
        {b, b^2, b^5, ab, ba, babab}
      - {b, b^2, ab, ba, ba(b^3)} (4 descendants)
        
        {b, b^2, ab, ba, ba(b^3), b^2(a^2)b}
        
        {b, b^2, ab, ba, ba(b^3), b^2a(b^2)}
        
        {b, b^2, ab, ba, ba(b^3), b^3ab}
        
        {b, b^2, b^5, ab, ba, ba(b^3)}
      - {b, b^2, ab, ba, b^2(a^2)b} (3 descendants)
        
        {b, b^2, ab, ba, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, ab, ba, b^2(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, ba, b^2(a^2)b}
      - {b, b^2, ab, ba, b^2a(b^2)} (2 descendants)
        
        {b, b^2, ab, ba, b^2a(b^2), b^3ab}
        
        {b, b^2, b^5, ab, ba, b^2a(b^2)}
      - {b, b^2, ab, ba, b^3ab} (1 descendant)
        
        {b, b^2, b^5, ab, ba, b^3ab}
      - {b, b^2, b^5, ab, ba} (0 descendants)
    - {b, ab, ba, a^2b} (13 descendants)
      - {b, ab, ba, a^2b, aba} (13 descendants)
        
        {b, ab, ba, b(a^2), a^2b, aba}
        
        {b, ab, ba, a^2b, aba, bab}
        
        {b, b^3, ab, ba, a^2b, aba}
        
        {b, ab, ba, a^2b, a^3b, aba}
        
        {b, ab, ba, a^2b, aba, a^2ba}
        
        {b, ab, ba, a^2b, aba, b(a^2)b}
        
        {b, ab, ba, a^2b, aba, ba(b^2)}
        
        {b, ab, ba, a^2b, aba, b^2ab}
        
        {b, ab, ba, a^2b, aba, b(a^3)b}
        
        {b, ab, ba, a^2b, aba, babab}
        
        {b, ab, ba, a^2b, aba, b^2(a^2)b}
        
        {b, ab, ba, a^2b, aba, b(a^4)b}
        
        {b, ab, ba, a^2b, aba, bab(a^2)b}
      - {b, ab, ba, b(a^2), a^2b} (16 descendants)
        
        {b, ab, ba, b(a^2), a^2b, bab}
        
        {b, b^3, ab, ba, b(a^2), a^2b}
        
        {b, ab, ba, b(a^2), a^2b, a^3b}
        
        {b, ab, ba, b(a^2), b(a^3), a^2b}
        
        {b, ab, ba, b(a^2), a^2b, b(a^2)b}
        
        {b, ab, ba, b(a^2), a^2b, ba(b^2)}
        
        {b, ab, ba, b(a^2), a^2b, b^2ab}
        
        {b, ab, ba, b(a^2), a^2b, b(a^3)b}
        
        {b, ab, ba, b(a^2), a^2b, b(a^2)(b^2)}
        
        {b, ab, ba, b(a^2), a^2b, babab}
        
        {b, ab, ba, b(a^2), a^2b, b^2(a^2)b}
        
        {b, ab, ba, b(a^2), a^2b, b(a^4)b}
        
        {b, ab, ba, b(a^2), a^2b, b(a^2)bab}
        
        {b, ab, ba, b(a^2), a^2b, bab(a^2)b}
        
        {b, ab, ba, b(a^2), a^2b, b(a^5)b}
        
        {b, ab, ba, b(a^2), a^2b, b(a^2)b(a^2)b}
      - {b, ab, ba, a^2b, bab} (20 descendants)
        
        {b, b^3, ab, ba, a^2b, bab}
        
        {b, ab, ba, a^2b, a^3b, bab}
        
        {b, ab, ba, a^2b, bab, abab}
        
        {b, ab, ba, a^2b, bab, b(a^2)b}
        
        {b, ab, ba, a^2b, bab, baba}
        
        {b, ab, ba, a^2b, bab, ba(b^2)}
        
        {b, ab, ba, a^2b, bab, b^2ab}
        
        {b, ab, ba, a^2b, bab, b(a^3)b}
        
        {b, ab, ba, a^2b, bab, babab}
        
        {b, ab, ba, a^2b, bab, ba(b^3)}
        
        {b, ab, ba, a^2b, bab, b^2(a^2)b}
        
        {b, ab, ba, a^2b, bab, b^3ab}
        
        {b, ab, ba, a^2b, bab, b(a^4)b}
        
        {b, ab, ba, a^2b, bab, b(a^2)bab}
        
        {b, ab, ba, a^2b, bab, bab(a^2)b}
        
        {b, ab, ba, a^2b, bab, ba(b^2)ab}
        
        {b, ab, ba, a^2b, bab, bab(a^3)b}
        
        {b, ab, ba, a^2b, bab, bababab}
        
        {b, ab, ba, a^2b, bab, ba(b^2)(a^2)b}
        
        {b, ab, ba, a^2b, bab, ba(b^3)ab}
      - {b, b^3, ab, ba, a^2b} (12 descendants)
        
        {b, b^3, ab, ba, a^2b, a^3b}
        
        {b, b^3, ab, a(b^3), ba, a^2b}
        
        {b, b^3, ab, ba, a^2b, b(a^2)b}
        
        {b, b^3, ab, ba, a^2b, ba(b^2)}
        
        {b, b^3, ab, ba, a^2b, b^2ab}
        
        {b, b^3, ab, ba, a^2b, b^3a}
        
        {b, b^3, ab, ba, a^2b, b(a^3)b}
        
        {b, b^3, ab, ba, a^2b, babab}
        
        {b, b^3, ab, ba, a^2b, b^2(a^2)b}
        
        {b, b^3, b^5, ab, ba, a^2b}
        
        {b, b^3, ab, ba, a^2b, b(a^4)b}
        
        {b, b^3, ab, ba, a^2b, bab(a^2)b}
      - {b, ab, ba, a^2b, a^3b} (12 descendants)
        
        {b, ab, ba, a^2b, a^3b, b(a^2)b}
        
        {b, ab, ba, a^2b, a^3b, ba(b^2)}
        
        {b, ab, ba, a^2b, a^3b, b^2ab}
        
        {b, ab, ba, a^2b, a^3b, a^4b}
        
        {b, ab, ba, a^2b, a^3b, b(a^3)b}
        
        {b, ab, ba, a^2b, a^3b, babab}
        
        {b, ab, ba, a^2b, a^3b, b^2(a^2)b}
        
        {b, ab, ba, a^2b, a^3b, b(a^4)b}
        
        {b, ab, ba, a^2b, a^3b, bab(a^2)b}
        
        {b, ab, ba, a^2b, a^3b, b^2(a^3)b}
        
        {b, ab, ba, a^2b, a^3b, b(a^5)b}
        
        {b, ab, ba, a^2b, a^3b, bab(a^3)b}
      - {b, ab, ba, a^2b, b(a^2)b} (12 descendants)
        
        {b, ab, ba, a^2b, ba(b^2), b(a^2)b}
        
        {b, ab, ba, a^2b, b(a^2)b, b^2ab}
        
        {b, ab, ba, a^2b, b(a^2)b, ab(a^2)b}
        
        {b, ab, ba, a^2b, b(a^2)b, b(a^3)b}
        
        {b, ab, ba, a^2b, b(a^2)b, b(a^2)ba}
        
        {b, ab, ba, a^2b, b(a^2)b, babab}
        
        {b, ab, ba, a^2b, b(a^2)b, b^2(a^2)b}
        
        {b, ab, ba, a^2b, b(a^2)b, b(a^4)b}
        
        {b, ab, ba, a^2b, b(a^2)b, bab(a^2)b}
        
        {b, ab, ba, a^2b, b(a^2)b, b^3(a^2)b}
        
        {b, ab, ba, a^2b, b(a^2)b, b(a^2)b(a^2)b}
        
        {b, ab, ba, a^2b, b(a^2)b, ba(b^2)(a^2)b}
      - {b, ab, ba, a^2b, ba(b^2)} (7 descendants)
        
        {b, ab, ba, a^2b, ba(b^2), b^2ab}
        
        {b, ab, ba, a^2b, ba(b^2), b(a^3)b}
        
        {b, ab, ba, a^2b, ba(b^2), babab}
        
        {b, ab, ba, a^2b, ba(b^2), ba(b^2)a}
        
        {b, ab, ba, a^2b, ba(b^2), b^2(a^2)b}
        
        {b, ab, ba, a^2b, ba(b^2), b(a^4)b}
        
        {b, ab, ba, a^2b, ba(b^2), bab(a^2)b}
      - {b, ab, ba, a^2b, b^2ab} (6 descendants)
        
        {b, ab, ba, a^2b, b^2ab, a(b^2)ab}
        
        {b, ab, ba, a^2b, b(a^3)b, b^2ab}
        
        {b, ab, ba, a^2b, b^2ab, babab}
        
        {b, ab, ba, a^2b, b^2ab, b^2(a^2)b}
        
        {b, ab, ba, a^2b, b(a^4)b, b^2ab}
        
        {b, ab, ba, a^2b, b^2ab, bab(a^2)b}
      - {b, ab, ba, a^2b, b(a^3)b} (5 descendants)
        
        {b, ab, ba, a^2b, b(a^3)b, babab}
        
        {b, ab, ba, a^2b, b(a^3)b, b^2(a^2)b}
        
        {b, ab, ba, a^2b, b(a^3)b, ab(a^3)b}
        
        {b, ab, ba, a^2b, b(a^3)b, b(a^4)b}
        
        {b, ab, ba, a^2b, b(a^3)b, bab(a^2)b}
      - {b, ab, ba, a^2b, babab} (3 descendants)
        
        {b, ab, ba, a^2b, b^2(a^2)b, babab}
        
        {b, ab, ba, a^2b, b(a^4)b, babab}
        
        {b, ab, ba, a^2b, babab, bab(a^2)b}
      - {b, ab, ba, a^2b, b^2(a^2)b} (3 descendants)
        
        {b, ab, ba, a^2b, b^2(a^2)b, a(b^2)(a^2)b}
        
        {b, ab, ba, a^2b, b(a^4)b, b^2(a^2)b}
        
        {b, ab, ba, a^2b, b^2(a^2)b, bab(a^2)b}
      - {b, ab, ba, a^2b, b(a^4)b} (1 descendant)
        
        {b, ab, ba, a^2b, b(a^4)b, bab(a^2)b}
      - {b, ab, ba, a^2b, bab(a^2)b} (0 descendants)
    - {b, ab, ba, aba} (8 descendants)
      - {b, ab, ba, b(a^2), aba} (12 descendants)
        
        {b, ab, ba, b(a^2), aba, bab}
        
        {b, b^3, ab, ba, b(a^2), aba}
        
        {b, ab, ba, b(a^2), aba, ab(a^2)}
        
        {b, ab, ba, b(a^2), b(a^3), aba}
        
        {b, ab, ba, b(a^2), aba, b(a^2)b}
        
        {b, ab, ba, b(a^2), aba, ba(b^2)}
        
        {b, ab, ba, b(a^2), aba, b^2ab}
        
        {b, ab, ba, b(a^2), aba, b(a^3)b}
        
        {b, ab, ba, b(a^2), aba, b(a^2)(b^2)}
        
        {b, ab, ba, b(a^2), aba, babab}
        
        {b, ab, ba, b(a^2), aba, b(a^4)b}
        
        {b, ab, ba, b(a^2), aba, b(a^2)bab}
      - {b, ab, ba, aba, bab} (15 descendants)
        
        {b, b^3, ab, ba, aba, bab}
        
        {b, ab, ba, aba, bab, abab}
        
        {b, ab, ba, aba, bab, b(a^2)b}
        
        {b, ab, ba, aba, bab, baba}
        
        {b, ab, ba, aba, bab, ba(b^2)}
        
        {b, ab, ba, aba, bab, b^2ab}
        
        {b, ab, ba, aba, bab, b(a^3)b}
        
        {b, ab, ba, aba, bab, babab}
        
        {b, ab, ba, aba, bab, ba(b^3)}
        
        {b, ab, ba, aba, bab, b^3ab}
        
        {b, ab, ba, aba, bab, b(a^2)bab}
        
        {b, ab, ba, aba, bab, bab(a^2)b}
        
        {b, ab, ba, aba, bab, ba(b^2)ab}
        
        {b, ab, ba, aba, bab, bababab}
        
        {b, ab, ba, aba, bab, ba(b^3)ab}
      - {b, b^3, ab, ba, aba} (8 descendants)
        
        {b, b^3, ab, a(b^3), ba, aba}
        
        {b, b^3, ab, ba, aba, b(a^2)b}
        
        {b, b^3, ab, ba, aba, ba(b^2)}
        
        {b, b^3, ab, ba, aba, b^2ab}
        
        {b, b^3, ab, ba, b^3a, aba}
        
        {b, b^3, ab, ba, aba, b(a^3)b}
        
        {b, b^3, ab, ba, aba, babab}
        
        {b, b^3, b^5, ab, ba, aba}
      - {b, ab, ba, aba, b(a^2)b} (7 descendants)
        
        {b, ab, ba, aba, ba(b^2), b(a^2)b}
        
        {b, ab, ba, aba, b(a^2)b, b^2ab}
        
        {b, ab, ba, aba, b(a^2)b, ab(a^2)b}
        
        {b, ab, ba, aba, b(a^2)b, b(a^3)b}
        
        {b, ab, ba, aba, b(a^2)b, b(a^2)ba}
        
        {b, ab, ba, aba, b(a^2)b, babab}
        
        {b, ab, ba, aba, b(a^2)b, b(a^2)b(a^2)b}
      - {b, ab, ba, aba, ba(b^2)} (5 descendants)
        
        {b, ab, ba, aba, ba(b^2), b^2ab}
        
        {b, ab, ba, aba, ba(b^2), aba(b^2)}
        
        {b, ab, ba, aba, ba(b^2), b(a^3)b}
        
        {b, ab, ba, aba, ba(b^2), babab}
        
        {b, ab, ba, aba, ba(b^2), ba(b^2)a}
      - {b, ab, ba, aba, b^2ab} (4 descendants)
        
        {b, ab, ba, aba, b^2ab, a(b^2)ab}
        
        {b, ab, ba, aba, b(a^3)b, b^2ab}
        
        {b, ab, ba, aba, b^2ab, babab}
        
        {b, ab, ba, aba, b^2ab, b^2aba}
      - {b, ab, ba, aba, b(a^3)b} (3 descendants)
        
        {b, ab, ba, aba, b(a^3)b, babab}
        
        {b, ab, ba, aba, b(a^3)b, ab(a^3)b}
        
        {b, ab, ba, aba, b(a^3)b, b(a^3)ba}
      - {b, ab, ba, aba, babab} (2 descendants)
        
        {b, ab, ba, aba, babab, ababab}
        
        {b, ab, ba, aba, babab, bababa}
    - {b, ab, ba, b(a^2)} (11 descendants)
      - {b, ab, ba, b(a^2), bab} (20 descendants)
        
        {b, b^3, ab, ba, b(a^2), bab}
        
        {b, ab, ba, b(a^2), bab, abab}
        
        {b, ab, ba, b(a^2), b(a^3), bab}
        
        {b, ab, ba, b(a^2), bab, b(a^2)b}
        
        {b, ab, ba, b(a^2), bab, baba}
        
        {b, ab, ba, b(a^2), bab, ba(b^2)}
        
        {b, ab, ba, b(a^2), bab, b^2ab}
        
        {b, ab, ba, b(a^2), bab, b(a^3)b}
        
        {b, ab, ba, b(a^2), bab, b(a^2)(b^2)}
        
        {b, ab, ba, b(a^2), bab, babab}
        
        {b, ab, ba, b(a^2), bab, ba(b^3)}
        
        {b, ab, ba, b(a^2), bab, b^3ab}
        
        {b, ab, ba, b(a^2), bab, b(a^4)b}
        
        {b, ab, ba, b(a^2), bab, b(a^2)bab}
        
        {b, ab, ba, b(a^2), bab, bab(a^2)b}
        
        {b, ab, ba, b(a^2), bab, ba(b^2)ab}
        
        {b, ab, ba, b(a^2), bab, b(a^3)bab}
        
        {b, ab, ba, b(a^2), bab, b(a^2)(b^2)ab}
        
        {b, ab, ba, b(a^2), bab, bababab}
        
        {b, ab, ba, b(a^2), bab, ba(b^3)ab}
      - {b, b^3, ab, ba, b(a^2)} (12 descendants)
        
        {b, b^3, ab, a(b^3), ba, b(a^2)}
        
        {b, b^3, ab, ba, b(a^2), b(a^3)}
        
        {b, b^3, ab, ba, b(a^2), b(a^2)b}
        
        {b, b^3, ab, ba, b(a^2), ba(b^2)}
        
        {b, b^3, ab, ba, b(a^2), b^2ab}
        
        {b, b^3, ab, ba, b(a^2), b^3a}
        
        {b, b^3, ab, ba, b(a^2), b(a^3)b}
        
        {b, b^3, ab, ba, b(a^2), b(a^2)(b^2)}
        
        {b, b^3, ab, ba, b(a^2), babab}
        
        {b, b^3, b^5, ab, ba, b(a^2)}
        
        {b, b^3, ab, ba, b(a^2), b(a^4)b}
        
        {b, b^3, ab, ba, b(a^2), b(a^2)bab}
      - {b, ab, ba, b(a^2), b(a^3)} (12 descendants)
        
        {b, ab, ba, b(a^2), b(a^3), b(a^2)b}
        
        {b, ab, ba, b(a^2), b(a^3), ba(b^2)}
        
        {b, ab, ba, b(a^2), b(a^3), b^2ab}
        
        {b, ab, ba, b(a^2), b(a^3), b(a^4)}
        
        {b, ab, ba, b(a^2), b(a^3), b(a^3)b}
        
        {b, ab, ba, b(a^2), b(a^3), b(a^2)(b^2)}
        
        {b, ab, ba, b(a^2), b(a^3), babab}
        
        {b, ab, ba, b(a^2), b(a^3), b(a^4)b}
        
        {b, ab, ba, b(a^2), b(a^3), b(a^3)(b^2)}
        
        {b, ab, ba, b(a^2), b(a^3), b(a^2)bab}
        
        {b, ab, ba, b(a^2), b(a^3), b(a^5)b}
        
        {b, ab, ba, b(a^2), b(a^3), b(a^3)bab}
      - {b, ab, ba, b(a^2), b(a^2)b} (12 descendants)
        
        {b, ab, ba, b(a^2), ba(b^2), b(a^2)b}
        
        {b, ab, ba, b(a^2), b(a^2)b, b^2ab}
        
        {b, ab, ba, b(a^2), b(a^2)b, ab(a^2)b}
        
        {b, ab, ba, b(a^2), b(a^2)b, b(a^3)b}
        
        {b, ab, ba, b(a^2), b(a^2)b, b(a^2)ba}
        
        {b, ab, ba, b(a^2), b(a^2)b, b(a^2)(b^2)}
        
        {b, ab, ba, b(a^2), b(a^2)b, babab}
        
        {b, ab, ba, b(a^2), b(a^2)b, b(a^4)b}
        
        {b, ab, ba, b(a^2), b(a^2)b, b(a^2)bab}
        
        {b, ab, ba, b(a^2), b(a^2)b, b(a^2)(b^3)}
        
        {b, ab, ba, b(a^2), b(a^2)b, b(a^2)b(a^2)b}
        
        {b, ab, ba, b(a^2), b(a^2)b, b(a^2)(b^2)ab}
      - {b, ab, ba, b(a^2), ba(b^2)} (7 descendants)
        
        {b, ab, ba, b(a^2), ba(b^2), b^2ab}
        
        {b, ab, ba, b(a^2), ba(b^2), b(a^3)b}
        
        {b, ab, ba, b(a^2), ba(b^2), b(a^2)(b^2)}
        
        {b, ab, ba, b(a^2), ba(b^2), babab}
        
        {b, ab, ba, b(a^2), ba(b^2), ba(b^2)a}
        
        {b, ab, ba, b(a^2), ba(b^2), b(a^4)b}
        
        {b, ab, ba, b(a^2), ba(b^2), b(a^2)bab}
      - {b, ab, ba, b(a^2), b^2ab} (6 descendants)
        
        {b, ab, ba, b(a^2), b^2ab, a(b^2)ab}
        
        {b, ab, ba, b(a^2), b(a^3)b, b^2ab}
        
        {b, ab, ba, b(a^2), b(a^2)(b^2), b^2ab}
        
        {b, ab, ba, b(a^2), b^2ab, babab}
        
        {b, ab, ba, b(a^2), b(a^4)b, b^2ab}
        
        {b, ab, ba, b(a^2), b^2ab, b(a^2)bab}
      - {b, ab, ba, b(a^2), b(a^3)b} (5 descendants)
        
        {b, ab, ba, b(a^2), b(a^2)(b^2), b(a^3)b}
        
        {b, ab, ba, b(a^2), b(a^3)b, babab}
        
        {b, ab, ba, b(a^2), b(a^3)b, b(a^4)b}
        
        {b, ab, ba, b(a^2), b(a^3)b, b(a^3)ba}
        
        {b, ab, ba, b(a^2), b(a^3)b, b(a^2)bab}
      - {b, ab, ba, b(a^2), b(a^2)(b^2)} (4 descendants)
        
        {b, ab, ba, b(a^2), b(a^2)(b^2), babab}
        
        {b, ab, ba, b(a^2), b(a^2)(b^2), b(a^4)b}
        
        {b, ab, ba, b(a^2), b(a^2)(b^2), b(a^2)bab}
        
        {b, ab, ba, b(a^2), b(a^2)(b^2), b(a^2)(b^2)a}
      - {b, ab, ba, b(a^2), babab} (2 descendants)
        
        {b, ab, ba, b(a^2), b(a^4)b, babab}
        
        {b, ab, ba, b(a^2), babab, b(a^2)bab}
      - {b, ab, ba, b(a^2), b(a^4)b} (1 descendant)
        
        {b, ab, ba, b(a^2), b(a^4)b, b(a^2)bab}
      - {b, ab, ba, b(a^2), b(a^2)bab} (0 descendants)
    - {b, ab, ba, bab} (15 descendants)
      - {b, b^3, ab, ba, bab} (17 descendants)
        
        {b, b^3, ab, ba, bab, abab}
        
        {b, b^3, ab, a(b^3), ba, bab}
        
        {b, b^3, ab, ba, bab, b(a^2)b}
        
        {b, b^3, ab, ba, bab, baba}
        
        {b, b^3, ab, ba, bab, ba(b^2)}
        
        {b, b^3, ab, ba, bab, b^2ab}
        
        {b, b^3, ab, ba, b^3a, bab}
        
        {b, b^3, ab, ba, bab, b(a^3)b}
        
        {b, b^3, ab, ba, bab, babab}
        
        {b, b^3, ab, ba, bab, ba(b^3)}
        
        {b, b^3, ab, ba, bab, b^3ab}
        
        {b, b^3, b^5, ab, ba, bab}
        
        {b, b^3, ab, ba, bab, b(a^2)bab}
        
        {b, b^3, ab, ba, bab, bab(a^2)b}
        
        {b, b^3, ab, ba, bab, ba(b^2)ab}
        
        {b, b^3, ab, ba, bab, bababab}
        
        {b, b^3, ab, ba, bab, ba(b^3)ab}
      - {b, ab, ba, bab, abab} (18 descendants)
        
        {b, ab, ba, bab, b(a^2)b, abab}
        
        {b, ab, ba, bab, abab, baba}
        
        {b, ab, ba, bab, ba(b^2), abab}
        
        {b, ab, ba, bab, b^2ab, abab}
        
        {b, ab, ba, bab, abab, a^2bab}
        
        {b, ab, ba, bab, b(a^3)b, abab}
        
        {b, ab, ba, bab, abab, babab}
        
        {b, ab, ba, bab, ba(b^3), abab}
        
        {b, ab, ba, bab, b^3ab, abab}
        
        {b, ab, ba, bab, abab, b(a^2)bab}
        
        {b, ab, ba, bab, abab, bab(a^2)b}
        
        {b, ab, ba, bab, abab, ba(b^2)ab}
        
        {b, ab, ba, bab, abab, b^2abab}
        
        {b, ab, ba, bab, abab, b(a^3)bab}
        
        {b, ab, ba, bab, abab, bababab}
        
        {b, ab, ba, bab, abab, ba(b^3)ab}
        
        {b, ab, ba, bab, abab, bab(a^2)bab}
        
        {b, ab, ba, bab, abab, ba(b^2)abab}
      - {b, ab, ba, bab, b(a^2)b} (15 descendants)
        
        {b, ab, ba, bab, b(a^2)b, baba}
        
        {b, ab, ba, bab, ba(b^2), b(a^2)b}
        
        {b, ab, ba, bab, b(a^2)b, b^2ab}
        
        {b, ab, ba, bab, b(a^2)b, ab(a^2)b}
        
        {b, ab, ba, bab, b(a^2)b, b(a^3)b}
        
        {b, ab, ba, bab, b(a^2)b, b(a^2)ba}
        
        {b, ab, ba, bab, b(a^2)b, babab}
        
        {b, ab, ba, bab, ba(b^3), b(a^2)b}
        
        {b, ab, ba, bab, b(a^2)b, b^3ab}
        
        {b, ab, ba, bab, b(a^2)b, b(a^2)bab}
        
        {b, ab, ba, bab, b(a^2)b, bab(a^2)b}
        
        {b, ab, ba, bab, b(a^2)b, ba(b^2)ab}
        
        {b, ab, ba, bab, b(a^2)b, b(a^2)b(a^2)b}
        
        {b, ab, ba, bab, b(a^2)b, bababab}
        
        {b, ab, ba, bab, b(a^2)b, ba(b^3)ab}
      - {b, ab, ba, bab, baba} (16 descendants)
        
        {b, ab, ba, bab, ba(b^2), baba}
        
        {b, ab, ba, bab, b^2ab, baba}
        
        {b, ab, ba, bab, b(a^3)b, baba}
        
        {b, ab, ba, bab, baba, bab(a^2)}
        
        {b, ab, ba, bab, baba, babab}
        
        {b, ab, ba, bab, ba(b^3), baba}
        
        {b, ab, ba, bab, b^3ab, baba}
        
        {b, ab, ba, bab, baba, b(a^2)bab}
        
        {b, ab, ba, bab, baba, bab(a^2)b}
        
        {b, ab, ba, bab, baba, baba(b^2)}
        
        {b, ab, ba, bab, baba, ba(b^2)ab}
        
        {b, ab, ba, bab, baba, bab(a^3)b}
        
        {b, ab, ba, bab, baba, bababab}
        
        {b, ab, ba, bab, baba, ba(b^3)ab}
        
        {b, ab, ba, bab, baba, bab(a^2)bab}
        
        {b, ab, ba, bab, baba, baba(b^2)ab}
      - {b, ab, ba, bab, ba(b^2)} (15 descendants)
        
        {b, ab, ba, bab, ba(b^2), b^2ab}
        
        {b, ab, ba, bab, ba(b^2), b(a^3)b}
        
        {b, ab, ba, bab, ba(b^2), babab}
        
        {b, ab, ba, bab, ba(b^2), ba(b^2)a}
        
        {b, ab, ba, bab, ba(b^2), ba(b^3)}
        
        {b, ab, ba, bab, ba(b^2), b^3ab}
        
        {b, ab, ba, bab, ba(b^2), b(a^2)bab}
        
        {b, ab, ba, bab, ba(b^2), bab(a^2)b}
        
        {b, ab, ba, bab, ba(b^2), ba(b^2)ab}
        
        {b, ab, ba, bab, ba(b^2), ba(b^4)}
        
        {b, ab, ba, bab, ba(b^2), bababab}
        
        {b, ab, ba, bab, ba(b^2), ba(b^2)(a^2)b}
        
        {b, ab, ba, bab, ba(b^2), ba(b^3)ab}
        
        {b, ab, ba, bab, ba(b^2), ba(b^2)abab}
        
        {b, ab, ba, bab, ba(b^2), ba(b^4)ab}
      - {b, ab, ba, bab, b^2ab} (14 descendants)
        
        {b, ab, ba, bab, b^2ab, a(b^2)ab}
        
        {b, ab, ba, bab, b(a^3)b, b^2ab}
        
        {b, ab, ba, bab, b^2ab, babab}
        
        {b, ab, ba, bab, ba(b^3), b^2ab}
        
        {b, ab, ba, bab, b^2ab, b^3ab}
        
        {b, ab, ba, bab, b^2ab, b(a^2)bab}
        
        {b, ab, ba, bab, b^2ab, bab(a^2)b}
        
        {b, ab, ba, bab, b^2ab, ba(b^2)ab}
        
        {b, ab, ba, bab, b^2ab, b^4ab}
        
        {b, ab, ba, bab, b^2ab, b(a^2)(b^2)ab}
        
        {b, ab, ba, bab, b^2ab, bababab}
        
        {b, ab, ba, bab, b^2ab, ba(b^3)ab}
        
        {b, ab, ba, bab, b^2ab, baba(b^2)ab}
        
        {b, ab, ba, bab, b^2ab, ba(b^4)ab}
      - {b, ab, ba, bab, b(a^3)b} (8 descendants)
        
        {b, ab, ba, bab, b(a^3)b, babab}
        
        {b, ab, ba, bab, ba(b^3), b(a^3)b}
        
        {b, ab, ba, bab, b(a^3)b, b^3ab}
        
        {b, ab, ba, bab, b(a^3)b, b(a^2)bab}
        
        {b, ab, ba, bab, b(a^3)b, bab(a^2)b}
        
        {b, ab, ba, bab, b(a^3)b, ba(b^2)ab}
        
        {b, ab, ba, bab, b(a^3)b, bababab}
        
        {b, ab, ba, bab, b(a^3)b, ba(b^3)ab}
      - {b, ab, ba, bab, babab} (10 descendants)
        
        {b, ab, ba, bab, ba(b^3), babab}
        
        {b, ab, ba, bab, b^3ab, babab}
        
        {b, ab, ba, bab, babab, ababab}
        
        {b, ab, ba, bab, babab, b(a^2)bab}
        
        {b, ab, ba, bab, babab, bab(a^2)b}
        
        {b, ab, ba, bab, babab, bababa}
        
        {b, ab, ba, bab, babab, ba(b^2)ab}
        
        {b, ab, ba, bab, babab, bababab}
        
        {b, ab, ba, bab, babab, ba(b^3)ab}
        
        {b, ab, ba, bab, babab, babababab}
      - {b, ab, ba, bab, ba(b^3)} (7 descendants)
        
        {b, ab, ba, bab, ba(b^3), b^3ab}
        
        {b, ab, ba, bab, ba(b^3), b(a^2)bab}
        
        {b, ab, ba, bab, ba(b^3), bab(a^2)b}
        
        {b, ab, ba, bab, ba(b^3), ba(b^2)ab}
        
        {b, ab, ba, bab, ba(b^3), ba(b^3)a}
        
        {b, ab, ba, bab, ba(b^3), bababab}
        
        {b, ab, ba, bab, ba(b^3), ba(b^3)ab}
      - {b, ab, ba, bab, b^3ab} (6 descendants)
        
        {b, ab, ba, bab, b^3ab, a(b^3)ab}
        
        {b, ab, ba, bab, b^3ab, b(a^2)bab}
        
        {b, ab, ba, bab, b^3ab, bab(a^2)b}
        
        {b, ab, ba, bab, b^3ab, ba(b^2)ab}
        
        {b, ab, ba, bab, b^3ab, bababab}
        
        {b, ab, ba, bab, b^3ab, ba(b^3)ab}
      - {b, ab, ba, bab, b(a^2)bab} (4 descendants)
        
        {b, ab, ba, bab, bab(a^2)b, b(a^2)bab}
        
        {b, ab, ba, bab, ba(b^2)ab, b(a^2)bab}
        
        {b, ab, ba, bab, b(a^2)bab, bababab}
        
        {b, ab, ba, bab, ba(b^3)ab, b(a^2)bab}
      - {b, ab, ba, bab, bab(a^2)b} (3 descendants)
        
        {b, ab, ba, bab, bab(a^2)b, ba(b^2)ab}
        
        {b, ab, ba, bab, bab(a^2)b, bababab}
        
        {b, ab, ba, bab, bab(a^2)b, ba(b^3)ab}
      - {b, ab, ba, bab, ba(b^2)ab} (2 descendants)
        
        {b, ab, ba, bab, ba(b^2)ab, bababab}
        
        {b, ab, ba, bab, ba(b^2)ab, ba(b^3)ab}
      - {b, ab, ba, bab, bababab} (1 descendant)
        
        {b, ab, ba, bab, ba(b^3)ab, bababab}
      - {b, ab, ba, bab, ba(b^3)ab} (0 descendants)
    - {b, b^3, ab, ba} (8 descendants)
      - {b, b^3, ab, a(b^3), ba} (7 descendants)
        
        {b, b^3, ab, a(b^3), ba, b(a^2)b}
        
        {b, b^3, ab, a(b^3), ba, ba(b^2)}
        
        {b, b^3, ab, a(b^3), ba, b^2ab}
        
        {b, b^3, ab, a(b^3), ba, b^3a}
        
        {b, b^3, ab, a(b^3), ba, b(a^3)b}
        
        {b, b^3, ab, a(b^3), ba, babab}
        
        {b, b^3, b^5, ab, a(b^3), ba}
      - {b, b^3, ab, ba, b(a^2)b} (11 descendants)
        
        {b, b^3, ab, ba, ba(b^2), b(a^2)b}
        
        {b, b^3, ab, ba, b(a^2)b, b^2ab}
        
        {b, b^3, ab, ba, b^3a, b(a^2)b}
        
        {b, b^3, ab, ba, b(a^2)b, ab(a^2)b}
        
        {b, b^3, ab, ba, b(a^2)b, b(a^3)b}
        
        {b, b^3, ab, ba, b(a^2)b, b(a^2)ba}
        
        {b, b^3, ab, ba, b(a^2)b, babab}
        
        {b, b^3, b^5, ab, ba, b(a^2)b}
        
        {b, b^3, ab, ba, b(a^2)b, b(a^2)(b^3)}
        
        {b, b^3, ab, ba, b(a^2)b, b^3(a^2)b}
        
        {b, b^3, ab, ba, b(a^2)b, b(a^2)b(a^2)b}
      - {b, b^3, ab, ba, ba(b^2)} (7 descendants)
        
        {b, b^3, ab, ba, ba(b^2), b^2ab}
        
        {b, b^3, ab, ba, b^3a, ba(b^2)}
        
        {b, b^3, ab, ba, ba(b^2), b(a^3)b}
        
        {b, b^3, ab, ba, ba(b^2), babab}
        
        {b, b^3, ab, ba, ba(b^2), ba(b^2)a}
        
        {b, b^3, b^5, ab, ba, ba(b^2)}
        
        {b, b^3, ab, ba, ba(b^2), ba(b^4)}
      - {b, b^3, ab, ba, b^2ab} (6 descendants)
        
        {b, b^3, ab, ba, b^3a, b^2ab}
        
        {b, b^3, ab, ba, b^2ab, a(b^2)ab}
        
        {b, b^3, ab, ba, b(a^3)b, b^2ab}
        
        {b, b^3, ab, ba, b^2ab, babab}
        
        {b, b^3, b^5, ab, ba, b^2ab}
        
        {b, b^3, ab, ba, b^2ab, b^4ab}
      - {b, b^3, ab, ba, b^3a} (3 descendants)
        
        {b, b^3, ab, ba, b^3a, b(a^3)b}
        
        {b, b^3, ab, ba, b^3a, babab}
        
        {b, b^3, b^5, ab, ba, b^3a}
      - {b, b^3, ab, ba, b(a^3)b} (2 descendants)
        
        {b, b^3, ab, ba, b(a^3)b, babab}
        
        {b, b^3, b^5, ab, ba, b(a^3)b}
      - {b, b^3, ab, ba, babab} (1 descendant)
        
        {b, b^3, b^5, ab, ba, babab}
      - {b, b^3, b^5, ab, ba} (1 descendant)
        
        {b, b^3, b^5, b^7, ab, ba}
    - {b, ab, ba, b(a^2)b} (7 descendants)
      - {b, ab, ba, ba(b^2), b(a^2)b} (8 descendants)
        
        {b, ab, ba, ba(b^2), b(a^2)b, b^2ab}
        
        {b, ab, ba, ba(b^2), b(a^2)b, ab(a^2)b}
        
        {b, ab, ba, ba(b^2), b(a^2)b, b(a^3)b}
        
        {b, ab, ba, ba(b^2), b(a^2)b, b(a^2)ba}
        
        {b, ab, ba, ba(b^2), b(a^2)b, babab}
        
        {b, ab, ba, ba(b^2), b(a^2)b, ba(b^2)a}
        
        {b, ab, ba, ba(b^2), b(a^2)b, b(a^2)b(a^2)b}
        
        {b, ab, ba, ba(b^2), b(a^2)b, ba(b^2)(a^2)b}
      - {b, ab, ba, b(a^2)b, b^2ab} (7 descendants)
        
        {b, ab, ba, b(a^2)b, b^2ab, ab(a^2)b}
        
        {b, ab, ba, b(a^2)b, b^2ab, a(b^2)ab}
        
        {b, ab, ba, b(a^2)b, b(a^3)b, b^2ab}
        
        {b, ab, ba, b(a^2)b, b^2ab, b(a^2)ba}
        
        {b, ab, ba, b(a^2)b, b^2ab, babab}
        
        {b, ab, ba, b(a^2)b, b^2ab, b(a^2)b(a^2)b}
        
        {b, ab, ba, b(a^2)b, b^2ab, b(a^2)(b^2)ab}
      - {b, ab, ba, b(a^2)b, ab(a^2)b} (4 descendants)
        
        {b, ab, ba, b(a^2)b, b(a^3)b, ab(a^2)b}
        
        {b, ab, ba, b(a^2)b, ab(a^2)b, b(a^2)ba}
        
        {b, ab, ba, b(a^2)b, ab(a^2)b, babab}
        
        {b, ab, ba, b(a^2)b, ab(a^2)b, b(a^2)b(a^2)b}
      - {b, ab, ba, b(a^2)b, b(a^3)b} (3 descendants)
        
        {b, ab, ba, b(a^2)b, b(a^3)b, b(a^2)ba}
        
        {b, ab, ba, b(a^2)b, b(a^3)b, babab}
        
        {b, ab, ba, b(a^2)b, b(a^3)b, b(a^2)b(a^2)b}
      - {b, ab, ba, b(a^2)b, b(a^2)ba} (2 descendants)
        
        {b, ab, ba, b(a^2)b, b(a^2)ba, babab}
        
        {b, ab, ba, b(a^2)b, b(a^2)ba, b(a^2)b(a^2)b}
      - {b, ab, ba, b(a^2)b, babab} (1 descendant)
        
        {b, ab, ba, b(a^2)b, babab, b(a^2)b(a^2)b}
      - {b, ab, ba, b(a^2)b, b(a^2)b(a^2)b} (0 descendants)
    - {b, ab, ba, ba(b^2)} (4 descendants)
      - {b, ab, ba, ba(b^2), b^2ab} (5 descendants)
        
        {b, ab, ba, ba(b^2), b^2ab, a(b^2)ab}
        
        {b, ab, ba, ba(b^2), b(a^3)b, b^2ab}
        
        {b, ab, ba, ba(b^2), b^2ab, babab}
        
        {b, ab, ba, ba(b^2), b^2ab, ba(b^2)a}
        
        {b, ab, ba, ba(b^2), b^2ab, ba(b^3)ab}
      - {b, ab, ba, ba(b^2), b(a^3)b} (2 descendants)
        
        {b, ab, ba, ba(b^2), b(a^3)b, babab}
        
        {b, ab, ba, ba(b^2), b(a^3)b, ba(b^2)a}
      - {b, ab, ba, ba(b^2), babab} (1 descendant)
        
        {b, ab, ba, ba(b^2), ba(b^2)a, babab}
      - {b, ab, ba, ba(b^2), ba(b^2)a} (1 descendant)
        
        {b, ab, ba, ba(b^2), ba(b^2)a, ba(b^2)a(b^2)}
    - {b, ab, ba, b^2ab} (3 descendants)
      - {b, ab, ba, b^2ab, a(b^2)ab} (3 descendants)
        
        {b, ab, ba, b(a^3)b, b^2ab, a(b^2)ab}
        
        {b, ab, ba, b^2ab, a(b^2)ab, babab}
        
        {b, ab, ba, b^2ab, a(b^2)ab, b^2a(b^2)ab}
      - {b, ab, ba, b(a^3)b, b^2ab} (1 descendant)
        
        {b, ab, ba, b(a^3)b, b^2ab, babab}
      - {b, ab, ba, b^2ab, babab} (0 descendants)
    - {b, ab, ba, b(a^3)b} (1 descendant)
      - {b, ab, ba, b(a^3)b, babab} (0 descendants)
    - {b, ab, ba, babab} (0 descendants)
  - {b, b^2, ab} (13 descendants)
    - {b, b^2, ab, a^2b} (16 descendants)
      - {b, b^2, ab, a(b^2), a^2b} (19 descendants)
        
        {b, b^2, ab, a(b^2), a^2b, bab}
        
        {b, b^2, ab, a(b^2), a^2b, b^2a}
        
        {b, b^2, b^3, ab, a(b^2), a^2b}
        
        {b, b^2, ab, a(b^2), a^2b, a^3b}
        
        {b, b^2, ab, a(b^2), a^2b, a^2(b^2)}
        
        {b, b^2, ab, a(b^2), a^2b, b(a^2)b}
        
        {b, b^2, ab, a(b^2), a^2b, ba(b^2)}
        
        {b, b^2, ab, a(b^2), a^2b, b^2ab}
        
        {b, b^2, b^4, ab, a(b^2), a^2b}
        
        {b, b^2, ab, a(b^2), a^2b, b(a^3)b}
        
        {b, b^2, ab, a(b^2), a^2b, b(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), a^2b, b^2(a^2)b}
        
        {b, b^2, ab, a(b^2), a^2b, b^2a(b^2)}
        
        {b, b^2, ab, a(b^2), a^2b, b^3ab}
        
        {b, b^2, b^5, ab, a(b^2), a^2b}
        
        {b, b^2, ab, a(b^2), a^2b, b^2(a^3)b}
        
        {b, b^2, ab, a(b^2), a^2b, b^2(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), a^2b, b^3(a^2)b}
        
        {b, b^2, ab, a(b^2), a^2b, b^3a(b^2)}
      - {b, b^2, ab, a^2b, bab} (18 descendants)
        
        {b, b^2, ab, a^2b, b^2a, bab}
        
        {b, b^2, b^3, ab, a^2b, bab}
        
        {b, b^2, ab, a^2b, a^3b, bab}
        
        {b, b^2, ab, a^2b, bab, abab}
        
        {b, b^2, ab, a^2b, bab, b(a^2)b}
        
        {b, b^2, ab, a^2b, bab, ba(b^2)}
        
        {b, b^2, ab, a^2b, bab, b^2ab}
        
        {b, b^2, b^4, ab, a^2b, bab}
        
        {b, b^2, ab, a^2b, bab, b(a^3)b}
        
        {b, b^2, ab, a^2b, bab, babab}
        
        {b, b^2, ab, a^2b, bab, b^2(a^2)b}
        
        {b, b^2, ab, a^2b, bab, b^2a(b^2)}
        
        {b, b^2, ab, a^2b, bab, b^3ab}
        
        {b, b^2, b^5, ab, a^2b, bab}
        
        {b, b^2, ab, a^2b, bab, b^2(a^3)b}
        
        {b, b^2, ab, a^2b, bab, b^2abab}
        
        {b, b^2, ab, a^2b, bab, b^3(a^2)b}
        
        {b, b^2, ab, a^2b, bab, b^4ab}
      - {b, b^2, ab, a^2b, b^2a} (19 descendants)
        
        {b, b^2, b^3, ab, a^2b, b^2a}
        
        {b, b^2, ab, a^2b, a^3b, b^2a}
        
        {b, b^2, ab, a^2b, b^2a, b(a^2)b}
        
        {b, b^2, ab, a^2b, b^2a, ba(b^2)}
        
        {b, b^2, ab, a^2b, b^2a, b^2(a^2)}
        
        {b, b^2, ab, a^2b, b^2a, b^2ab}
        
        {b, b^2, b^4, ab, a^2b, b^2a}
        
        {b, b^2, ab, a^2b, b^2a, b(a^3)b}
        
        {b, b^2, ab, a^2b, b^2a, b^2(a^2)b}
        
        {b, b^2, ab, a^2b, b^2a, b^2a(b^2)}
        
        {b, b^2, ab, a^2b, b^2a, b^3ab}
        
        {b, b^2, b^5, ab, a^2b, b^2a}
        
        {b, b^2, ab, a^2b, b^2a, b^2(a^3)b}
        
        {b, b^2, ab, a^2b, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, ab, a^2b, b^2a, b^2abab}
        
        {b, b^2, ab, a^2b, b^2a, b^2a(b^3)}
        
        {b, b^2, ab, a^2b, b^2a, b^3(a^2)b}
        
        {b, b^2, ab, a^2b, b^2a, b^2(a^4)b}
        
        {b, b^2, ab, a^2b, b^2a, b^2ab(a^2)b}
      - {b, b^2, b^3, ab, a^2b} (23 descendants)
        
        {b, b^2, b^3, ab, a^2b, a^3b}
        
        {b, b^2, b^3, ab, a(b^3), a^2b}
        
        {b, b^2, b^3, ab, a^2b, b(a^2)b}
        
        {b, b^2, b^3, ab, a^2b, ba(b^2)}
        
        {b, b^2, b^3, ab, a^2b, b^2ab}
        
        {b, b^2, b^3, ab, a^2b, b^3a}
        
        {b, b^2, b^3, b^4, ab, a^2b}
        
        {b, b^2, b^3, ab, a^2b, b(a^3)b}
        
        {b, b^2, b^3, ab, a^2b, ba(b^3)}
        
        {b, b^2, b^3, ab, a^2b, b^2(a^2)b}
        
        {b, b^2, b^3, ab, a^2b, b^2a(b^2)}
        
        {b, b^2, b^3, ab, a^2b, b^3ab}
        
        {b, b^2, b^3, b^5, ab, a^2b}
        
        {b, b^2, b^3, ab, a^2b, b^2(a^3)b}
        
        {b, b^2, b^3, ab, a^2b, b^2a(b^3)}
        
        {b, b^2, b^3, ab, a^2b, b^3(a^2)b}
        
        {b, b^2, b^3, ab, a^2b, b^3a(b^2)}
        
        {b, b^2, b^3, ab, a^2b, b^4ab}
        
        {b, b^2, b^3, b^6, ab, a^2b}
        
        {b, b^2, b^3, ab, a^2b, b^3(a^3)b}
        
        {b, b^2, b^3, ab, a^2b, b^3a(b^3)}
        
        {b, b^2, b^3, ab, a^2b, b^4(a^2)b}
        
        {b, b^2, b^3, b^7, ab, a^2b}
      - {b, b^2, ab, a^2b, a^3b} (15 descendants)
        
        {b, b^2, ab, a^2b, a^3b, b(a^2)b}
        
        {b, b^2, ab, a^2b, a^3b, ba(b^2)}
        
        {b, b^2, ab, a^2b, a^3b, b^2ab}
        
        {b, b^2, b^4, ab, a^2b, a^3b}
        
        {b, b^2, ab, a^2b, a^3b, a^4b}
        
        {b, b^2, ab, a^2b, a^3b, b(a^3)b}
        
        {b, b^2, ab, a^2b, a^3b, b^2(a^2)b}
        
        {b, b^2, ab, a^2b, a^3b, b^2a(b^2)}
        
        {b, b^2, ab, a^2b, a^3b, b^3ab}
        
        {b, b^2, b^5, ab, a^2b, a^3b}
        
        {b, b^2, ab, a^2b, a^3b, b(a^4)b}
        
        {b, b^2, ab, a^2b, a^3b, b^2(a^3)b}
        
        {b, b^2, ab, a^2b, a^3b, b^3(a^2)b}
        
        {b, b^2, ab, a^2b, a^3b, b^2(a^4)b}
        
        {b, b^2, ab, a^2b, a^3b, b^3(a^3)b}
      - {b, b^2, ab, a^2b, b(a^2)b} (14 descendants)
        
        {b, b^2, ab, a^2b, ba(b^2), b(a^2)b}
        
        {b, b^2, ab, a^2b, b(a^2)b, b^2ab}
        
        {b, b^2, b^4, ab, a^2b, b(a^2)b}
        
        {b, b^2, ab, a^2b, b(a^2)b, ab(a^2)b}
        
        {b, b^2, ab, a^2b, b(a^2)b, b(a^3)b}
        
        {b, b^2, ab, a^2b, b(a^2)b, b^2(a^2)b}
        
        {b, b^2, ab, a^2b, b(a^2)b, b^2a(b^2)}
        
        {b, b^2, ab, a^2b, b(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, a^2b, b(a^2)b}
        
        {b, b^2, ab, a^2b, b(a^2)b, bab(a^2)b}
        
        {b, b^2, ab, a^2b, b(a^2)b, b^2(a^3)b}
        
        {b, b^2, ab, a^2b, b(a^2)b, b^3(a^2)b}
        
        {b, b^2, ab, a^2b, b(a^2)b, b^2ab(a^2)b}
        
        {b, b^2, ab, a^2b, b(a^2)b, b^4(a^2)b}
      - {b, b^2, ab, a^2b, ba(b^2)} (10 descendants)
        
        {b, b^2, ab, a^2b, ba(b^2), b^2ab}
        
        {b, b^2, b^4, ab, a^2b, ba(b^2)}
        
        {b, b^2, ab, a^2b, ba(b^2), aba(b^2)}
        
        {b, b^2, ab, a^2b, ba(b^2), b(a^3)b}
        
        {b, b^2, ab, a^2b, ba(b^2), b^2(a^2)b}
        
        {b, b^2, ab, a^2b, ba(b^2), b^2a(b^2)}
        
        {b, b^2, ab, a^2b, ba(b^2), b^3ab}
        
        {b, b^2, b^5, ab, a^2b, ba(b^2)}
        
        {b, b^2, ab, a^2b, ba(b^2), b^2(a^3)b}
        
        {b, b^2, ab, a^2b, ba(b^2), b^3(a^2)b}
      - {b, b^2, ab, a^2b, b^2ab} (10 descendants)
        
        {b, b^2, b^4, ab, a^2b, b^2ab}
        
        {b, b^2, ab, a^2b, b^2ab, a(b^2)ab}
        
        {b, b^2, ab, a^2b, b(a^3)b, b^2ab}
        
        {b, b^2, ab, a^2b, b^2ab, b^2(a^2)b}
        
        {b, b^2, ab, a^2b, b^2ab, b^2a(b^2)}
        
        {b, b^2, ab, a^2b, b^2ab, b^3ab}
        
        {b, b^2, b^5, ab, a^2b, b^2ab}
        
        {b, b^2, ab, a^2b, b^2ab, b^2(a^3)b}
        
        {b, b^2, ab, a^2b, b^2ab, b^3(a^2)b}
        
        {b, b^2, ab, a^2b, b^2ab, b^2a(b^2)ab}
      - {b, b^2, b^4, ab, a^2b} (9 descendants)
        
        {b, b^2, b^4, ab, a(b^4), a^2b}
        
        {b, b^2, b^4, ab, a^2b, b(a^3)b}
        
        {b, b^2, b^4, ab, a^2b, b^2(a^2)b}
        
        {b, b^2, b^4, ab, a^2b, b^2a(b^2)}
        
        {b, b^2, b^4, ab, a^2b, b^3ab}
        
        {b, b^2, b^4, b^5, ab, a^2b}
        
        {b, b^2, b^4, ab, a^2b, b^2(a^3)b}
        
        {b, b^2, b^4, ab, a^2b, b^3(a^2)b}
        
        {b, b^2, b^4, b^7, ab, a^2b}
      - {b, b^2, ab, a^2b, b(a^3)b} (7 descendants)
        
        {b, b^2, ab, a^2b, b(a^3)b, b^2(a^2)b}
        
        {b, b^2, ab, a^2b, b(a^3)b, b^2a(b^2)}
        
        {b, b^2, ab, a^2b, b(a^3)b, b^3ab}
        
        {b, b^2, b^5, ab, a^2b, b(a^3)b}
        
        {b, b^2, ab, a^2b, b(a^3)b, ab(a^3)b}
        
        {b, b^2, ab, a^2b, b(a^3)b, b^2(a^3)b}
        
        {b, b^2, ab, a^2b, b(a^3)b, b^3(a^2)b}
      - {b, b^2, ab, a^2b, b^2(a^2)b} (6 descendants)
        
        {b, b^2, ab, a^2b, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, ab, a^2b, b^2(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, a^2b, b^2(a^2)b}
        
        {b, b^2, ab, a^2b, b^2(a^2)b, a(b^2)(a^2)b}
        
        {b, b^2, ab, a^2b, b^2(a^2)b, b^2(a^3)b}
        
        {b, b^2, ab, a^2b, b^2(a^2)b, b^3(a^2)b}
      - {b, b^2, ab, a^2b, b^2a(b^2)} (4 descendants)
        
        {b, b^2, ab, a^2b, b^2a(b^2), b^3ab}
        
        {b, b^2, b^5, ab, a^2b, b^2a(b^2)}
        
        {b, b^2, ab, a^2b, b^2a(b^2), b^2(a^3)b}
        
        {b, b^2, ab, a^2b, b^2a(b^2), b^3(a^2)b}
      - {b, b^2, ab, a^2b, b^3ab} (3 descendants)
        
        {b, b^2, b^5, ab, a^2b, b^3ab}
        
        {b, b^2, ab, a^2b, b^2(a^3)b, b^3ab}
        
        {b, b^2, ab, a^2b, b^3ab, b^3(a^2)b}
      - {b, b^2, b^5, ab, a^2b} (2 descendants)
        
        {b, b^2, b^5, ab, a^2b, b^2(a^3)b}
        
        {b, b^2, b^5, ab, a^2b, b^3(a^2)b}
      - {b, b^2, ab, a^2b, b^2(a^3)b} (1 descendant)
        
        {b, b^2, ab, a^2b, b^2(a^3)b, b^3(a^2)b}
      - {b, b^2, ab, a^2b, b^3(a^2)b} (0 descendants)
    - {b, b^2, ab, a(b^2)} (15 descendants)
      - {b, b^2, ab, a(b^2), bab} (18 descendants)
        
        {b, b^2, ab, a(b^2), b^2a, bab}
        
        {b, b^2, b^3, ab, a(b^2), bab}
        
        {b, b^2, ab, a(b^2), a^2(b^2), bab}
        
        {b, b^2, ab, a(b^2), bab, abab}
        
        {b, b^2, ab, a(b^2), bab, b(a^2)b}
        
        {b, b^2, ab, a(b^2), bab, ba(b^2)}
        
        {b, b^2, ab, a(b^2), bab, b^2ab}
        
        {b, b^2, b^4, ab, a(b^2), bab}
        
        {b, b^2, ab, a(b^2), bab, b(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), bab, babab}
        
        {b, b^2, ab, a(b^2), bab, b^2(a^2)b}
        
        {b, b^2, ab, a(b^2), bab, b^2a(b^2)}
        
        {b, b^2, ab, a(b^2), bab, b^3ab}
        
        {b, b^2, b^5, ab, a(b^2), bab}
        
        {b, b^2, ab, a(b^2), bab, b^2(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), bab, b^2abab}
        
        {b, b^2, ab, a(b^2), bab, b^3a(b^2)}
        
        {b, b^2, ab, a(b^2), bab, b^4ab}
      - {b, b^2, ab, a(b^2), b^2a} (20 descendants)
        
        {b, b^2, b^3, ab, a(b^2), b^2a}
        
        {b, b^2, ab, a(b^2), a^2(b^2), b^2a}
        
        {b, b^2, ab, a(b^2), b^2a, a(b^2)a}
        
        {b, b^2, ab, a(b^2), b^2a, b(a^2)b}
        
        {b, b^2, ab, a(b^2), b^2a, ba(b^2)}
        
        {b, b^2, ab, a(b^2), b^2a, b^2(a^2)}
        
        {b, b^2, ab, a(b^2), b^2a, b^2ab}
        
        {b, b^2, b^4, ab, a(b^2), b^2a}
        
        {b, b^2, ab, a(b^2), b^2a, b(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), b^2a, b^2(a^2)b}
        
        {b, b^2, ab, a(b^2), b^2a, b^2a(b^2)}
        
        {b, b^2, ab, a(b^2), b^2a, b^3ab}
        
        {b, b^2, b^5, ab, a(b^2), b^2a}
        
        {b, b^2, ab, a(b^2), b^2a, b^2(a^3)b}
        
        {b, b^2, ab, a(b^2), b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), b^2a, b^2abab}
        
        {b, b^2, ab, a(b^2), b^2a, b^2a(b^3)}
        
        {b, b^2, ab, a(b^2), b^2a, b^3a(b^2)}
        
        {b, b^2, ab, a(b^2), b^2a, b^2(a^3)(b^2)}
        
        {b, b^2, ab, a(b^2), b^2a, b^2aba(b^2)}
      - {b, b^2, b^3, ab, a(b^2)} (23 descendants)
        
        {b, b^2, b^3, ab, a(b^2), a^2(b^2)}
        
        {b, b^2, b^3, ab, a(b^2), a(b^3)}
        
        {b, b^2, b^3, ab, a(b^2), b(a^2)b}
        
        {b, b^2, b^3, ab, a(b^2), ba(b^2)}
        
        {b, b^2, b^3, ab, a(b^2), b^2ab}
        
        {b, b^2, b^3, ab, a(b^2), b^3a}
        
        {b, b^2, b^3, b^4, ab, a(b^2)}
        
        {b, b^2, b^3, ab, a(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^3, ab, a(b^2), ba(b^3)}
        
        {b, b^2, b^3, ab, a(b^2), b^2(a^2)b}
        
        {b, b^2, b^3, ab, a(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, ab, a(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, ab, a(b^2)}
        
        {b, b^2, b^3, ab, a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, ab, a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, ab, a(b^2), b^3(a^2)b}
        
        {b, b^2, b^3, ab, a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, ab, a(b^2), b^4ab}
        
        {b, b^2, b^3, b^6, ab, a(b^2)}
        
        {b, b^2, b^3, ab, a(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, ab, a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, ab, a(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, ab, a(b^2)}
      - {b, b^2, ab, a(b^2), a^2(b^2)} (15 descendants)
        
        {b, b^2, ab, a(b^2), a^2(b^2), b(a^2)b}
        
        {b, b^2, ab, a(b^2), a^2(b^2), ba(b^2)}
        
        {b, b^2, ab, a(b^2), a^2(b^2), b^2ab}
        
        {b, b^2, b^4, ab, a(b^2), a^2(b^2)}
        
        {b, b^2, ab, a(b^2), a^2(b^2), a^3(b^2)}
        
        {b, b^2, ab, a(b^2), a^2(b^2), b(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), a^2(b^2), b^2(a^2)b}
        
        {b, b^2, ab, a(b^2), a^2(b^2), b^2a(b^2)}
        
        {b, b^2, ab, a(b^2), a^2(b^2), b^3ab}
        
        {b, b^2, b^5, ab, a(b^2), a^2(b^2)}
        
        {b, b^2, ab, a(b^2), a^2(b^2), b(a^3)(b^2)}
        
        {b, b^2, ab, a(b^2), a^2(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), a^2(b^2), b^3a(b^2)}
        
        {b, b^2, ab, a(b^2), a^2(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, ab, a(b^2), a^2(b^2), b^3(a^2)(b^2)}
      - {b, b^2, ab, a(b^2), b(a^2)b} (11 descendants)
        
        {b, b^2, ab, a(b^2), ba(b^2), b(a^2)b}
        
        {b, b^2, ab, a(b^2), b(a^2)b, b^2ab}
        
        {b, b^2, b^4, ab, a(b^2), b(a^2)b}
        
        {b, b^2, ab, a(b^2), b(a^2)b, ab(a^2)b}
        
        {b, b^2, ab, a(b^2), b(a^2)b, b(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), b(a^2)b, b^2(a^2)b}
        
        {b, b^2, ab, a(b^2), b(a^2)b, b^2a(b^2)}
        
        {b, b^2, ab, a(b^2), b(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, a(b^2), b(a^2)b}
        
        {b, b^2, ab, a(b^2), b(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), b(a^2)b, b^3a(b^2)}
      - {b, b^2, ab, a(b^2), ba(b^2)} (13 descendants)
        
        {b, b^2, ab, a(b^2), ba(b^2), b^2ab}
        
        {b, b^2, b^4, ab, a(b^2), ba(b^2)}
        
        {b, b^2, ab, a(b^2), ba(b^2), aba(b^2)}
        
        {b, b^2, ab, a(b^2), ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), ba(b^2), b^2(a^2)b}
        
        {b, b^2, ab, a(b^2), ba(b^2), b^2a(b^2)}
        
        {b, b^2, ab, a(b^2), ba(b^2), b^3ab}
        
        {b, b^2, b^5, ab, a(b^2), ba(b^2)}
        
        {b, b^2, ab, a(b^2), ba(b^2), baba(b^2)}
        
        {b, b^2, ab, a(b^2), ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), ba(b^2), b^3a(b^2)}
        
        {b, b^2, ab, a(b^2), ba(b^2), b^2aba(b^2)}
        
        {b, b^2, ab, a(b^2), ba(b^2), b^4a(b^2)}
      - {b, b^2, ab, a(b^2), b^2ab} (10 descendants)
        
        {b, b^2, b^4, ab, a(b^2), b^2ab}
        
        {b, b^2, ab, a(b^2), b^2ab, a(b^2)ab}
        
        {b, b^2, ab, a(b^2), b(a^2)(b^2), b^2ab}
        
        {b, b^2, ab, a(b^2), b^2ab, b^2(a^2)b}
        
        {b, b^2, ab, a(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, ab, a(b^2), b^2ab, b^3ab}
        
        {b, b^2, b^5, ab, a(b^2), b^2ab}
        
        {b, b^2, ab, a(b^2), b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), b^2ab, b^3a(b^2)}
        
        {b, b^2, ab, a(b^2), b^2ab, b^2a(b^2)ab}
      - {b, b^2, b^4, ab, a(b^2)} (9 descendants)
        
        {b, b^2, b^4, ab, a(b^2), a(b^4)}
        
        {b, b^2, b^4, ab, a(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^4, ab, a(b^2), b^2(a^2)b}
        
        {b, b^2, b^4, ab, a(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, ab, a(b^2), b^3ab}
        
        {b, b^2, b^4, b^5, ab, a(b^2)}
        
        {b, b^2, b^4, ab, a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^4, ab, a(b^2), b^3a(b^2)}
        
        {b, b^2, b^4, b^7, ab, a(b^2)}
      - {b, b^2, ab, a(b^2), b(a^2)(b^2)} (7 descendants)
        
        {b, b^2, ab, a(b^2), b(a^2)(b^2), b^2(a^2)b}
        
        {b, b^2, ab, a(b^2), b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, ab, a(b^2), b(a^2)(b^2), b^3ab}
        
        {b, b^2, b^5, ab, a(b^2), b(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), b(a^2)(b^2), ab(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), b(a^2)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), b(a^2)(b^2), b^3a(b^2)}
      - {b, b^2, ab, a(b^2), b^2(a^2)b} (6 descendants)
        
        {b, b^2, ab, a(b^2), b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, ab, a(b^2), b^2(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, a(b^2), b^2(a^2)b}
        
        {b, b^2, ab, a(b^2), b^2(a^2)b, a(b^2)(a^2)b}
        
        {b, b^2, ab, a(b^2), b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), b^2(a^2)b, b^3a(b^2)}
      - {b, b^2, ab, a(b^2), b^2a(b^2)} (5 descendants)
        
        {b, b^2, ab, a(b^2), b^2a(b^2), b^3ab}
        
        {b, b^2, b^5, ab, a(b^2), b^2a(b^2)}
        
        {b, b^2, ab, a(b^2), b^2a(b^2), a(b^2)a(b^2)}
        
        {b, b^2, ab, a(b^2), b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, ab, a(b^2), b^2a(b^2), b^3a(b^2)}
      - {b, b^2, ab, a(b^2), b^3ab} (4 descendants)
        
        {b, b^2, b^5, ab, a(b^2), b^3ab}
        
        {b, b^2, ab, a(b^2), b^3ab, a(b^3)ab}
        
        {b, b^2, ab, a(b^2), b^2(a^2)(b^2), b^3ab}
        
        {b, b^2, ab, a(b^2), b^3ab, b^3a(b^2)}
      - {b, b^2, b^5, ab, a(b^2)} (3 descendants)
        
        {b, b^2, b^5, ab, a(b^2), a(b^5)}
        
        {b, b^2, b^5, ab, a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^5, ab, a(b^2), b^3a(b^2)}
      - {b, b^2, ab, a(b^2), b^2(a^2)(b^2)} (2 descendants)
        
        {b, b^2, ab, a(b^2), b^2(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, ab, a(b^2), b^2(a^2)(b^2), a(b^2)(a^2)(b^2)}
      - {b, b^2, ab, a(b^2), b^3a(b^2)} (1 descendant)
        
        {b, b^2, ab, a(b^2), b^3a(b^2), a(b^3)a(b^2)}
    - {b, b^2, ab, bab} (14 descendants)
      - {b, b^2, ab, b^2a, bab} (19 descendants)
        
        {b, b^2, b^3, ab, b^2a, bab}
        
        {b, b^2, ab, b^2a, bab, abab}
        
        {b, b^2, ab, b^2a, bab, b(a^2)b}
        
        {b, b^2, ab, b^2a, bab, ba(b^2)}
        
        {b, b^2, ab, b^2a, b^2(a^2), bab}
        
        {b, b^2, ab, b^2a, bab, b^2ab}
        
        {b, b^2, b^4, ab, b^2a, bab}
        
        {b, b^2, ab, b^2a, bab, babab}
        
        {b, b^2, ab, b^2a, bab, b^2(a^2)b}
        
        {b, b^2, ab, b^2a, bab, b^2a(b^2)}
        
        {b, b^2, ab, b^2a, bab, b^3ab}
        
        {b, b^2, b^5, ab, b^2a, bab}
        
        {b, b^2, ab, b^2a, bab, b^2(a^3)b}
        
        {b, b^2, ab, b^2a, bab, b^2(a^2)(b^2)}
        
        {b, b^2, ab, b^2a, bab, b^2abab}
        
        {b, b^2, ab, b^2a, bab, b^2a(b^3)}
        
        {b, b^2, ab, b^2a, bab, b^4ab}
        
        {b, b^2, ab, b^2a, bab, b^2(a^2)bab}
        
        {b, b^2, ab, b^2a, bab, b^2a(b^2)ab}
      - {b, b^2, b^3, ab, bab} (23 descendants)
        
        {b, b^2, b^3, ab, bab, abab}
        
        {b, b^2, b^3, ab, a(b^3), bab}
        
        {b, b^2, b^3, ab, bab, b(a^2)b}
        
        {b, b^2, b^3, ab, bab, ba(b^2)}
        
        {b, b^2, b^3, ab, bab, b^2ab}
        
        {b, b^2, b^3, ab, b^3a, bab}
        
        {b, b^2, b^3, b^4, ab, bab}
        
        {b, b^2, b^3, ab, bab, babab}
        
        {b, b^2, b^3, ab, bab, ba(b^3)}
        
        {b, b^2, b^3, ab, bab, b^2(a^2)b}
        
        {b, b^2, b^3, ab, bab, b^2a(b^2)}
        
        {b, b^2, b^3, ab, bab, b^3ab}
        
        {b, b^2, b^3, b^5, ab, bab}
        
        {b, b^2, b^3, ab, bab, b^2abab}
        
        {b, b^2, b^3, ab, bab, b^2a(b^3)}
        
        {b, b^2, b^3, ab, bab, b^3(a^2)b}
        
        {b, b^2, b^3, ab, bab, b^3a(b^2)}
        
        {b, b^2, b^3, ab, bab, b^4ab}
        
        {b, b^2, b^3, b^6, ab, bab}
        
        {b, b^2, b^3, ab, bab, b^3abab}
        
        {b, b^2, b^3, ab, bab, b^3a(b^3)}
        
        {b, b^2, b^3, ab, bab, b^5ab}
        
        {b, b^2, b^3, b^7, ab, bab}
      - {b, b^2, ab, bab, abab} (15 descendants)
        
        {b, b^2, ab, bab, b(a^2)b, abab}
        
        {b, b^2, ab, bab, ba(b^2), abab}
        
        {b, b^2, ab, bab, b^2ab, abab}
        
        {b, b^2, b^4, ab, bab, abab}
        
        {b, b^2, ab, bab, abab, a^2bab}
        
        {b, b^2, ab, bab, abab, babab}
        
        {b, b^2, ab, bab, b^2(a^2)b, abab}
        
        {b, b^2, ab, bab, b^2a(b^2), abab}
        
        {b, b^2, ab, bab, b^3ab, abab}
        
        {b, b^2, b^5, ab, bab, abab}
        
        {b, b^2, ab, bab, abab, b(a^2)bab}
        
        {b, b^2, ab, bab, abab, b^2abab}
        
        {b, b^2, ab, bab, b^4ab, abab}
        
        {b, b^2, ab, bab, abab, b^2(a^2)bab}
        
        {b, b^2, ab, bab, abab, b^3abab}
      - {b, b^2, ab, bab, b(a^2)b} (12 descendants)
        
        {b, b^2, ab, bab, ba(b^2), b(a^2)b}
        
        {b, b^2, ab, bab, b(a^2)b, b^2ab}
        
        {b, b^2, b^4, ab, bab, b(a^2)b}
        
        {b, b^2, ab, bab, b(a^2)b, ab(a^2)b}
        
        {b, b^2, ab, bab, b(a^2)b, babab}
        
        {b, b^2, ab, bab, b(a^2)b, b^2(a^2)b}
        
        {b, b^2, ab, bab, b(a^2)b, b^2a(b^2)}
        
        {b, b^2, ab, bab, b(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, bab, b(a^2)b}
        
        {b, b^2, ab, bab, b(a^2)b, bab(a^2)b}
        
        {b, b^2, ab, bab, b(a^2)b, b^2abab}
        
        {b, b^2, ab, bab, b(a^2)b, b^4ab}
      - {b, b^2, ab, bab, ba(b^2)} (11 descendants)
        
        {b, b^2, ab, bab, ba(b^2), b^2ab}
        
        {b, b^2, b^4, ab, bab, ba(b^2)}
        
        {b, b^2, ab, bab, ba(b^2), aba(b^2)}
        
        {b, b^2, ab, bab, ba(b^2), babab}
        
        {b, b^2, ab, bab, ba(b^2), b^2(a^2)b}
        
        {b, b^2, ab, bab, ba(b^2), b^2a(b^2)}
        
        {b, b^2, ab, bab, ba(b^2), b^3ab}
        
        {b, b^2, b^5, ab, bab, ba(b^2)}
        
        {b, b^2, ab, bab, ba(b^2), baba(b^2)}
        
        {b, b^2, ab, bab, ba(b^2), b^2abab}
        
        {b, b^2, ab, bab, ba(b^2), b^4ab}
      - {b, b^2, ab, bab, b^2ab} (12 descendants)
        
        {b, b^2, b^4, ab, bab, b^2ab}
        
        {b, b^2, ab, bab, b^2ab, a(b^2)ab}
        
        {b, b^2, ab, bab, b^2ab, babab}
        
        {b, b^2, ab, bab, b^2ab, b^2(a^2)b}
        
        {b, b^2, ab, bab, b^2ab, b^2a(b^2)}
        
        {b, b^2, ab, bab, b^2ab, b^3ab}
        
        {b, b^2, b^5, ab, bab, b^2ab}
        
        {b, b^2, ab, bab, b^2ab, ba(b^2)ab}
        
        {b, b^2, ab, bab, b^2ab, b^2abab}
        
        {b, b^2, ab, bab, b^2ab, b^4ab}
        
        {b, b^2, ab, bab, b^2ab, b^2a(b^2)ab}
        
        {b, b^2, ab, bab, b^2ab, b^5ab}
      - {b, b^2, b^4, ab, bab} (10 descendants)
        
        {b, b^2, b^4, ab, a(b^4), bab}
        
        {b, b^2, b^4, ab, bab, babab}
        
        {b, b^2, b^4, ab, bab, b^2(a^2)b}
        
        {b, b^2, b^4, ab, bab, b^2a(b^2)}
        
        {b, b^2, b^4, ab, bab, b^3ab}
        
        {b, b^2, b^4, b^5, ab, bab}
        
        {b, b^2, b^4, ab, bab, ba(b^4)}
        
        {b, b^2, b^4, ab, bab, b^2abab}
        
        {b, b^2, b^4, ab, bab, b^4ab}
        
        {b, b^2, b^4, b^7, ab, bab}
      - {b, b^2, ab, bab, babab} (8 descendants)
        
        {b, b^2, ab, bab, b^2(a^2)b, babab}
        
        {b, b^2, ab, bab, b^2a(b^2), babab}
        
        {b, b^2, ab, bab, b^3ab, babab}
        
        {b, b^2, b^5, ab, bab, babab}
        
        {b, b^2, ab, bab, babab, ababab}
        
        {b, b^2, ab, bab, babab, b^2abab}
        
        {b, b^2, ab, bab, b^4ab, babab}
        
        {b, b^2, ab, bab, babab, bababab}
      - {b, b^2, ab, bab, b^2(a^2)b} (5 descendants)
        
        {b, b^2, ab, bab, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, ab, bab, b^2(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, bab, b^2(a^2)b}
        
        {b, b^2, ab, bab, b^2(a^2)b, b^2abab}
        
        {b, b^2, ab, bab, b^2(a^2)b, b^4ab}
      - {b, b^2, ab, bab, b^2a(b^2)} (4 descendants)
        
        {b, b^2, ab, bab, b^2a(b^2), b^3ab}
        
        {b, b^2, b^5, ab, bab, b^2a(b^2)}
        
        {b, b^2, ab, bab, b^2a(b^2), b^2abab}
        
        {b, b^2, ab, bab, b^2a(b^2), b^4ab}
      - {b, b^2, ab, bab, b^3ab} (5 descendants)
        
        {b, b^2, b^5, ab, bab, b^3ab}
        
        {b, b^2, ab, bab, b^3ab, a(b^3)ab}
        
        {b, b^2, ab, bab, b^3ab, b^2abab}
        
        {b, b^2, ab, bab, b^3ab, b^4ab}
        
        {b, b^2, ab, bab, b^3ab, ba(b^3)ab}
      - {b, b^2, b^5, ab, bab} (2 descendants)
        
        {b, b^2, b^5, ab, bab, b^2abab}
        
        {b, b^2, b^5, ab, bab, b^4ab}
      - {b, b^2, ab, bab, b^2abab} (1 descendant)
        
        {b, b^2, ab, bab, b^4ab, b^2abab}
      - {b, b^2, ab, bab, b^4ab} (0 descendants)
    - {b, b^2, ab, b^2a} (14 descendants)
      - {b, b^2, b^3, ab, b^2a} (24 descendants)
        
        {b, b^2, b^3, ab, a(b^3), b^2a}
        
        {b, b^2, b^3, ab, b^2a, b(a^2)b}
        
        {b, b^2, b^3, ab, b^2a, ba(b^2)}
        
        {b, b^2, b^3, ab, b^2a, b^2(a^2)}
        
        {b, b^2, b^3, ab, b^2a, b^2ab}
        
        {b, b^2, b^3, ab, b^2a, b^3a}
        
        {b, b^2, b^3, b^4, ab, b^2a}
        
        {b, b^2, b^3, ab, b^2a, ba(b^3)}
        
        {b, b^2, b^3, ab, b^2a, b^2(a^2)b}
        
        {b, b^2, b^3, ab, b^2a, b^2a(b^2)}
        
        {b, b^2, b^3, ab, b^2a, b^3ab}
        
        {b, b^2, b^3, b^5, ab, b^2a}
        
        {b, b^2, b^3, ab, b^2a, b^2(a^3)b}
        
        {b, b^2, b^3, ab, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, ab, b^2a, b^2abab}
        
        {b, b^2, b^3, ab, b^2a, b^2a(b^3)}
        
        {b, b^2, b^3, ab, b^2a, b^3(a^2)b}
        
        {b, b^2, b^3, ab, b^2a, b^3a(b^2)}
        
        {b, b^2, b^3, ab, b^2a, b^4ab}
        
        {b, b^2, b^3, b^6, ab, b^2a}
        
        {b, b^2, b^3, ab, b^2a, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, ab, b^2a, b^2a(b^4)}
        
        {b, b^2, b^3, ab, b^2a, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, b^2a}
      - {b, b^2, ab, b^2a, b(a^2)b} (13 descendants)
        
        {b, b^2, ab, b^2a, ba(b^2), b(a^2)b}
        
        {b, b^2, ab, b^2a, b^2(a^2), b(a^2)b}
        
        {b, b^2, ab, b^2a, b(a^2)b, b^2ab}
        
        {b, b^2, b^4, ab, b^2a, b(a^2)b}
        
        {b, b^2, ab, b^2a, b(a^2)b, ab(a^2)b}
        
        {b, b^2, ab, b^2a, b(a^2)b, b^2(a^2)b}
        
        {b, b^2, ab, b^2a, b(a^2)b, b^2a(b^2)}
        
        {b, b^2, ab, b^2a, b(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, b^2a, b(a^2)b}
        
        {b, b^2, ab, b^2a, b(a^2)b, b^2(a^3)b}
        
        {b, b^2, ab, b^2a, b(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, ab, b^2a, b(a^2)b, b^2abab}
        
        {b, b^2, ab, b^2a, b(a^2)b, b^2a(b^3)}
      - {b, b^2, ab, b^2a, ba(b^2)} (12 descendants)
        
        {b, b^2, ab, b^2a, b^2(a^2), ba(b^2)}
        
        {b, b^2, ab, b^2a, ba(b^2), b^2ab}
        
        {b, b^2, b^4, ab, b^2a, ba(b^2)}
        
        {b, b^2, ab, b^2a, ba(b^2), aba(b^2)}
        
        {b, b^2, ab, b^2a, ba(b^2), b^2(a^2)b}
        
        {b, b^2, ab, b^2a, ba(b^2), b^2a(b^2)}
        
        {b, b^2, ab, b^2a, ba(b^2), b^3ab}
        
        {b, b^2, b^5, ab, b^2a, ba(b^2)}
        
        {b, b^2, ab, b^2a, ba(b^2), b^2(a^3)b}
        
        {b, b^2, ab, b^2a, ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, ab, b^2a, ba(b^2), b^2abab}
        
        {b, b^2, ab, b^2a, ba(b^2), b^2a(b^3)}
      - {b, b^2, ab, b^2a, b^2(a^2)} (15 descendants)
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2ab}
        
        {b, b^2, b^4, ab, b^2a, b^2(a^2)}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2(a^3)}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2(a^2)b}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2a(b^2)}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^3ab}
        
        {b, b^2, b^5, ab, b^2a, b^2(a^2)}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2(a^3)b}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2(a^2)(b^2)}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2abab}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2a(b^3)}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2(a^4)b}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2(a^3)(b^2)}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2(a^2)bab}
        
        {b, b^2, ab, b^2a, b^2(a^2), b^2(a^2)(b^3)}
      - {b, b^2, ab, b^2a, b^2ab} (15 descendants)
        
        {b, b^2, b^4, ab, b^2a, b^2ab}
        
        {b, b^2, ab, b^2a, b^2ab, a(b^2)ab}
        
        {b, b^2, ab, b^2a, b^2ab, b^2(a^2)b}
        
        {b, b^2, ab, b^2a, b^2ab, b^2aba}
        
        {b, b^2, ab, b^2a, b^2ab, b^2a(b^2)}
        
        {b, b^2, ab, b^2a, b^2ab, b^3ab}
        
        {b, b^2, b^5, ab, b^2a, b^2ab}
        
        {b, b^2, ab, b^2a, b^2ab, b^2(a^3)b}
        
        {b, b^2, ab, b^2a, b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, ab, b^2a, b^2ab, b^2abab}
        
        {b, b^2, ab, b^2a, b^2ab, b^2a(b^3)}
        
        {b, b^2, ab, b^2a, b^2ab, b^2ab(a^2)b}
        
        {b, b^2, ab, b^2a, b^2ab, b^2aba(b^2)}
        
        {b, b^2, ab, b^2a, b^2ab, b^2a(b^2)ab}
        
        {b, b^2, ab, b^2a, b^2ab, b^2a(b^4)}
      - {b, b^2, b^4, ab, b^2a} (10 descendants)
        
        {b, b^2, b^4, ab, a(b^4), b^2a}
        
        {b, b^2, b^4, ab, b^2a, b^2(a^2)b}
        
        {b, b^2, b^4, ab, b^2a, b^2a(b^2)}
        
        {b, b^2, b^4, ab, b^2a, b^3ab}
        
        {b, b^2, b^4, b^5, ab, b^2a}
        
        {b, b^2, b^4, ab, b^2a, b^2(a^3)b}
        
        {b, b^2, b^4, ab, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^4, ab, b^2a, b^2abab}
        
        {b, b^2, b^4, ab, b^2a, b^2a(b^3)}
        
        {b, b^2, b^4, b^7, ab, b^2a}
      - {b, b^2, ab, b^2a, b^2(a^2)b} (7 descendants)
        
        {b, b^2, ab, b^2a, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, ab, b^2a, b^2(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, b^2a, b^2(a^2)b}
        
        {b, b^2, ab, b^2a, b^2(a^2)b, b^2(a^3)b}
        
        {b, b^2, ab, b^2a, b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, ab, b^2a, b^2(a^2)b, b^2abab}
        
        {b, b^2, ab, b^2a, b^2a(b^3), b^2(a^2)b}
      - {b, b^2, ab, b^2a, b^2a(b^2)} (6 descendants)
        
        {b, b^2, ab, b^2a, b^2a(b^2), b^3ab}
        
        {b, b^2, b^5, ab, b^2a, b^2a(b^2)}
        
        {b, b^2, ab, b^2a, b^2a(b^2), b^2(a^3)b}
        
        {b, b^2, ab, b^2a, b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, ab, b^2a, b^2a(b^2), b^2abab}
        
        {b, b^2, ab, b^2a, b^2a(b^2), b^2a(b^3)}
      - {b, b^2, ab, b^2a, b^3ab} (5 descendants)
        
        {b, b^2, b^5, ab, b^2a, b^3ab}
        
        {b, b^2, ab, b^2a, b^2(a^3)b, b^3ab}
        
        {b, b^2, ab, b^2a, b^2(a^2)(b^2), b^3ab}
        
        {b, b^2, ab, b^2a, b^3ab, b^2abab}
        
        {b, b^2, ab, b^2a, b^2a(b^3), b^3ab}
      - {b, b^2, b^5, ab, b^2a} (4 descendants)
        
        {b, b^2, b^5, ab, b^2a, b^2(a^3)b}
        
        {b, b^2, b^5, ab, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^5, ab, b^2a, b^2abab}
        
        {b, b^2, b^5, ab, b^2a, b^2a(b^3)}
      - {b, b^2, ab, b^2a, b^2(a^3)b} (3 descendants)
        
        {b, b^2, ab, b^2a, b^2(a^2)(b^2), b^2(a^3)b}
        
        {b, b^2, ab, b^2a, b^2(a^3)b, b^2abab}
        
        {b, b^2, ab, b^2a, b^2a(b^3), b^2(a^3)b}
      - {b, b^2, ab, b^2a, b^2(a^2)(b^2)} (2 descendants)
        
        {b, b^2, ab, b^2a, b^2(a^2)(b^2), b^2abab}
        
        {b, b^2, ab, b^2a, b^2a(b^3), b^2(a^2)(b^2)}
      - {b, b^2, ab, b^2a, b^2abab} (1 descendant)
        
        {b, b^2, ab, b^2a, b^2a(b^3), b^2abab}
      - {b, b^2, ab, b^2a, b^2a(b^3)} (0 descendants)
    - {b, b^2, b^3, ab} (18 descendants)
      - {b, b^2, b^3, ab, a(b^3)} (22 descendants)
        
        {b, b^2, b^3, ab, a(b^3), b(a^2)b}
        
        {b, b^2, b^3, ab, a(b^3), ba(b^2)}
        
        {b, b^2, b^3, ab, a(b^3), b^2ab}
        
        {b, b^2, b^3, ab, a(b^3), b^3a}
        
        {b, b^2, b^3, b^4, ab, a(b^3)}
        
        {b, b^2, b^3, ab, a(b^3), a^2(b^3)}
        
        {b, b^2, b^3, ab, a(b^3), ba(b^3)}
        
        {b, b^2, b^3, ab, a(b^3), b^2(a^2)b}
        
        {b, b^2, b^3, ab, a(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, ab, a(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, ab, a(b^3)}
        
        {b, b^2, b^3, ab, a(b^3), b(a^2)(b^3)}
        
        {b, b^2, b^3, ab, a(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, ab, a(b^3), b^3(a^2)b}
        
        {b, b^2, b^3, ab, a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, ab, a(b^3), b^4ab}
        
        {b, b^2, b^3, b^6, ab, a(b^3)}
        
        {b, b^2, b^3, ab, a(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, ab, a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, a(b^3)}
        
        {b, b^2, b^3, ab, a(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, ab, a(b^3), b^4a(b^3)}
      - {b, b^2, b^3, ab, b(a^2)b} (17 descendants)
        
        {b, b^2, b^3, ab, ba(b^2), b(a^2)b}
        
        {b, b^2, b^3, ab, b(a^2)b, b^2ab}
        
        {b, b^2, b^3, ab, b^3a, b(a^2)b}
        
        {b, b^2, b^3, b^4, ab, b(a^2)b}
        
        {b, b^2, b^3, ab, b(a^2)b, ab(a^2)b}
        
        {b, b^2, b^3, ab, ba(b^3), b(a^2)b}
        
        {b, b^2, b^3, ab, b(a^2)b, b^2(a^2)b}
        
        {b, b^2, b^3, ab, b(a^2)b, b^2a(b^2)}
        
        {b, b^2, b^3, ab, b(a^2)b, b^3ab}
        
        {b, b^2, b^3, b^5, ab, b(a^2)b}
        
        {b, b^2, b^3, ab, b(a^2)b, b^2a(b^3)}
        
        {b, b^2, b^3, ab, b(a^2)b, b^3(a^2)b}
        
        {b, b^2, b^3, ab, b(a^2)b, b^3a(b^2)}
        
        {b, b^2, b^3, ab, b(a^2)b, b^4ab}
        
        {b, b^2, b^3, b^6, ab, b(a^2)b}
        
        {b, b^2, b^3, ab, b(a^2)b, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, b(a^2)b}
      - {b, b^2, b^3, ab, ba(b^2)} (16 descendants)
        
        {b, b^2, b^3, ab, ba(b^2), b^2ab}
        
        {b, b^2, b^3, ab, b^3a, ba(b^2)}
        
        {b, b^2, b^3, b^4, ab, ba(b^2)}
        
        {b, b^2, b^3, ab, ba(b^2), aba(b^2)}
        
        {b, b^2, b^3, ab, ba(b^2), ba(b^3)}
        
        {b, b^2, b^3, ab, ba(b^2), b^2(a^2)b}
        
        {b, b^2, b^3, ab, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, ab, ba(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, ab, ba(b^2)}
        
        {b, b^2, b^3, ab, ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, ab, ba(b^2), b^3(a^2)b}
        
        {b, b^2, b^3, ab, ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, ab, ba(b^2), b^4ab}
        
        {b, b^2, b^3, b^6, ab, ba(b^2)}
        
        {b, b^2, b^3, ab, ba(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, ba(b^2)}
      - {b, b^2, b^3, ab, b^2ab} (16 descendants)
        
        {b, b^2, b^3, ab, b^3a, b^2ab}
        
        {b, b^2, b^3, b^4, ab, b^2ab}
        
        {b, b^2, b^3, ab, b^2ab, a(b^2)ab}
        
        {b, b^2, b^3, ab, ba(b^3), b^2ab}
        
        {b, b^2, b^3, ab, b^2ab, b^2(a^2)b}
        
        {b, b^2, b^3, ab, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, ab, b^2ab, b^3ab}
        
        {b, b^2, b^3, b^5, ab, b^2ab}
        
        {b, b^2, b^3, ab, b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, ab, b^2ab, b^3(a^2)b}
        
        {b, b^2, b^3, ab, b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, ab, b^2ab, b^4ab}
        
        {b, b^2, b^3, b^6, ab, b^2ab}
        
        {b, b^2, b^3, ab, b^2ab, b^2a(b^2)ab}
        
        {b, b^2, b^3, ab, b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, b^2ab}
      - {b, b^2, b^3, ab, b^3a} (19 descendants)
        
        {b, b^2, b^3, b^4, ab, b^3a}
        
        {b, b^2, b^3, ab, b^3a, ba(b^3)}
        
        {b, b^2, b^3, ab, b^3a, b^2(a^2)b}
        
        {b, b^2, b^3, ab, b^3a, b^2a(b^2)}
        
        {b, b^2, b^3, ab, b^3a, b^3(a^2)}
        
        {b, b^2, b^3, ab, b^3a, b^3ab}
        
        {b, b^2, b^3, b^5, ab, b^3a}
        
        {b, b^2, b^3, ab, b^3a, b^2a(b^3)}
        
        {b, b^2, b^3, ab, b^3a, b^3(a^2)b}
        
        {b, b^2, b^3, ab, b^3a, b^3a(b^2)}
        
        {b, b^2, b^3, ab, b^3a, b^4ab}
        
        {b, b^2, b^3, b^6, ab, b^3a}
        
        {b, b^2, b^3, ab, b^3a, b^3(a^3)b}
        
        {b, b^2, b^3, ab, b^3a, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, ab, b^3a, b^3abab}
        
        {b, b^2, b^3, ab, b^3a, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, b^3a}
        
        {b, b^2, b^3, ab, b^3a, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, ab, b^3a, b^3a(b^4)}
      - {b, b^2, b^3, b^4, ab} (24 descendants)
        
        {b, b^2, b^3, b^4, ab, a(b^4)}
        
        {b, b^2, b^3, b^4, ab, ba(b^3)}
        
        {b, b^2, b^3, b^4, ab, b^2(a^2)b}
        
        {b, b^2, b^3, b^4, ab, b^2a(b^2)}
        
        {b, b^2, b^3, b^4, ab, b^3ab}
        
        {b, b^2, b^3, b^4, ab, b^4a}
        
        {b, b^2, b^3, b^4, b^5, ab}
        
        {b, b^2, b^3, b^4, ab, ba(b^4)}
        
        {b, b^2, b^3, b^4, ab, b^2a(b^3)}
        
        {b, b^2, b^3, b^4, ab, b^3(a^2)b}
        
        {b, b^2, b^3, b^4, ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, ab, b^4ab}
        
        {b, b^2, b^3, b^4, b^6, ab}
        
        {b, b^2, b^3, b^4, ab, b^2a(b^4)}
        
        {b, b^2, b^3, b^4, ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, ab, b^4(a^2)b}
        
        {b, b^2, b^3, b^4, ab, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, ab, b^5ab}
        
        {b, b^2, b^3, b^4, b^7, ab}
        
        {b, b^2, b^3, b^4, ab, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, ab, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, ab}
        
        {b, b^2, b^3, b^4, ab, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, ab}
      - {b, b^2, b^3, ab, ba(b^3)} (12 descendants)
        
        {b, b^2, b^3, ab, ba(b^3), b^2(a^2)b}
        
        {b, b^2, b^3, ab, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, ab, ba(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, ab, ba(b^3)}
        
        {b, b^2, b^3, ab, ba(b^3), aba(b^3)}
        
        {b, b^2, b^3, ab, ba(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, ab, ba(b^3), b^3(a^2)b}
        
        {b, b^2, b^3, ab, ba(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, ab, ba(b^3), b^4ab}
        
        {b, b^2, b^3, b^6, ab, ba(b^3)}
        
        {b, b^2, b^3, ab, ba(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, ba(b^3)}
      - {b, b^2, b^3, ab, b^2(a^2)b} (10 descendants)
        
        {b, b^2, b^3, ab, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, b^3, ab, b^2(a^2)b, b^3ab}
        
        {b, b^2, b^3, b^5, ab, b^2(a^2)b}
        
        {b, b^2, b^3, ab, b^2a(b^3), b^2(a^2)b}
        
        {b, b^2, b^3, ab, b^2(a^2)b, b^3(a^2)b}
        
        {b, b^2, b^3, ab, b^2(a^2)b, b^3a(b^2)}
        
        {b, b^2, b^3, ab, b^2(a^2)b, b^4ab}
        
        {b, b^2, b^3, b^6, ab, b^2(a^2)b}
        
        {b, b^2, b^3, ab, b^2(a^2)b, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, b^2(a^2)b}
      - {b, b^2, b^3, ab, b^2a(b^2)} (9 descendants)
        
        {b, b^2, b^3, ab, b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, ab, b^2a(b^2)}
        
        {b, b^2, b^3, ab, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, ab, b^2a(b^2), b^3(a^2)b}
        
        {b, b^2, b^3, ab, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, ab, b^2a(b^2), b^4ab}
        
        {b, b^2, b^3, b^6, ab, b^2a(b^2)}
        
        {b, b^2, b^3, ab, b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, b^2a(b^2)}
      - {b, b^2, b^3, ab, b^3ab} (8 descendants)
        
        {b, b^2, b^3, b^5, ab, b^3ab}
        
        {b, b^2, b^3, ab, b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, ab, b^3ab, b^3(a^2)b}
        
        {b, b^2, b^3, ab, b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, ab, b^3ab, b^4ab}
        
        {b, b^2, b^3, b^6, ab, b^3ab}
        
        {b, b^2, b^3, ab, b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, b^3ab}
      - {b, b^2, b^3, b^5, ab} (9 descendants)
        
        {b, b^2, b^3, b^5, ab, a(b^5)}
        
        {b, b^2, b^3, b^5, ab, b^2a(b^3)}
        
        {b, b^2, b^3, b^5, ab, b^3(a^2)b}
        
        {b, b^2, b^3, b^5, ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^5, ab, b^4ab}
        
        {b, b^2, b^3, b^5, b^6, ab}
        
        {b, b^2, b^3, b^5, ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, ab}
        
        {b, b^2, b^3, b^5, b^9, ab}
      - {b, b^2, b^3, ab, b^2a(b^3)} (6 descendants)
        
        {b, b^2, b^3, ab, b^2a(b^3), b^3(a^2)b}
        
        {b, b^2, b^3, ab, b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, ab, b^2a(b^3), b^4ab}
        
        {b, b^2, b^3, b^6, ab, b^2a(b^3)}
        
        {b, b^2, b^3, ab, b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, b^2a(b^3)}
      - {b, b^2, b^3, ab, b^3(a^2)b} (5 descendants)
        
        {b, b^2, b^3, ab, b^3a(b^2), b^3(a^2)b}
        
        {b, b^2, b^3, ab, b^3(a^2)b, b^4ab}
        
        {b, b^2, b^3, b^6, ab, b^3(a^2)b}
        
        {b, b^2, b^3, ab, b^3a(b^3), b^3(a^2)b}
        
        {b, b^2, b^3, b^7, ab, b^3(a^2)b}
      - {b, b^2, b^3, ab, b^3a(b^2)} (4 descendants)
        
        {b, b^2, b^3, ab, b^3a(b^2), b^4ab}
        
        {b, b^2, b^3, b^6, ab, b^3a(b^2)}
        
        {b, b^2, b^3, ab, b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ab, b^3a(b^2)}
      - {b, b^2, b^3, ab, b^4ab} (3 descendants)
        
        {b, b^2, b^3, b^6, ab, b^4ab}
        
        {b, b^2, b^3, ab, b^3a(b^3), b^4ab}
        
        {b, b^2, b^3, b^7, ab, b^4ab}
      - {b, b^2, b^3, b^6, ab} (2 descendants)
        
        {b, b^2, b^3, b^6, ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, ab}
      - {b, b^2, b^3, ab, b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^7, ab, b^3a(b^3)}
      - {b, b^2, b^3, b^7, ab} (0 descendants)
    - {b, b^2, ab, b(a^2)b} (8 descendants)
      - {b, b^2, ab, ba(b^2), b(a^2)b} (8 descendants)
        
        {b, b^2, ab, ba(b^2), b(a^2)b, b^2ab}
        
        {b, b^2, b^4, ab, ba(b^2), b(a^2)b}
        
        {b, b^2, ab, ba(b^2), b(a^2)b, ab(a^2)b}
        
        {b, b^2, ab, ba(b^2), b(a^2)b, aba(b^2)}
        
        {b, b^2, ab, ba(b^2), b(a^2)b, b^2(a^2)b}
        
        {b, b^2, ab, ba(b^2), b(a^2)b, b^2a(b^2)}
        
        {b, b^2, ab, ba(b^2), b(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, ba(b^2), b(a^2)b}
      - {b, b^2, ab, b(a^2)b, b^2ab} (9 descendants)
        
        {b, b^2, b^4, ab, b(a^2)b, b^2ab}
        
        {b, b^2, ab, b(a^2)b, b^2ab, ab(a^2)b}
        
        {b, b^2, ab, b(a^2)b, b^2ab, a(b^2)ab}
        
        {b, b^2, ab, b(a^2)b, b^2ab, b^2(a^2)b}
        
        {b, b^2, ab, b(a^2)b, b^2ab, b^2a(b^2)}
        
        {b, b^2, ab, b(a^2)b, b^2ab, b^3ab}
        
        {b, b^2, b^5, ab, b(a^2)b, b^2ab}
        
        {b, b^2, ab, b(a^2)b, b^2ab, b^2ab(a^2)b}
        
        {b, b^2, ab, b(a^2)b, b^2ab, b^2a(b^2)ab}
      - {b, b^2, b^4, ab, b(a^2)b} (8 descendants)
        
        {b, b^2, b^4, ab, b(a^2)b, ab(a^2)b}
        
        {b, b^2, b^4, ab, a(b^4), b(a^2)b}
        
        {b, b^2, b^4, ab, b(a^2)b, b^2(a^2)b}
        
        {b, b^2, b^4, ab, b(a^2)b, b^2a(b^2)}
        
        {b, b^2, b^4, ab, b(a^2)b, b^3ab}
        
        {b, b^2, b^4, b^5, ab, b(a^2)b}
        
        {b, b^2, b^4, ab, b(a^2)b, b^4(a^2)b}
        
        {b, b^2, b^4, b^7, ab, b(a^2)b}
      - {b, b^2, ab, b(a^2)b, ab(a^2)b} (5 descendants)
        
        {b, b^2, ab, b(a^2)b, b^2(a^2)b, ab(a^2)b}
        
        {b, b^2, ab, b(a^2)b, b^2a(b^2), ab(a^2)b}
        
        {b, b^2, ab, b(a^2)b, b^3ab, ab(a^2)b}
        
        {b, b^2, b^5, ab, b(a^2)b, ab(a^2)b}
        
        {b, b^2, ab, b(a^2)b, ab(a^2)b, b(a^2)b(a^2)b}
      - {b, b^2, ab, b(a^2)b, b^2(a^2)b} (3 descendants)
        
        {b, b^2, ab, b(a^2)b, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, ab, b(a^2)b, b^2(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, b(a^2)b, b^2(a^2)b}
      - {b, b^2, ab, b(a^2)b, b^2a(b^2)} (2 descendants)
        
        {b, b^2, ab, b(a^2)b, b^2a(b^2), b^3ab}
        
        {b, b^2, b^5, ab, b(a^2)b, b^2a(b^2)}
      - {b, b^2, ab, b(a^2)b, b^3ab} (1 descendant)
        
        {b, b^2, b^5, ab, b(a^2)b, b^3ab}
      - {b, b^2, b^5, ab, b(a^2)b} (0 descendants)
    - {b, b^2, ab, ba(b^2)} (7 descendants)
      - {b, b^2, ab, ba(b^2), b^2ab} (9 descendants)
        
        {b, b^2, b^4, ab, ba(b^2), b^2ab}
        
        {b, b^2, ab, ba(b^2), b^2ab, aba(b^2)}
        
        {b, b^2, ab, ba(b^2), b^2ab, a(b^2)ab}
        
        {b, b^2, ab, ba(b^2), b^2ab, b^2(a^2)b}
        
        {b, b^2, ab, ba(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, ab, ba(b^2), b^2ab, b^3ab}
        
        {b, b^2, b^5, ab, ba(b^2), b^2ab}
        
        {b, b^2, ab, ba(b^2), b^2ab, b^2aba(b^2)}
        
        {b, b^2, ab, ba(b^2), b^2ab, b^2a(b^2)ab}
      - {b, b^2, b^4, ab, ba(b^2)} (8 descendants)
        
        {b, b^2, b^4, ab, ba(b^2), aba(b^2)}
        
        {b, b^2, b^4, ab, a(b^4), ba(b^2)}
        
        {b, b^2, b^4, ab, ba(b^2), b^2(a^2)b}
        
        {b, b^2, b^4, ab, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, ab, ba(b^2), b^3ab}
        
        {b, b^2, b^4, b^5, ab, ba(b^2)}
        
        {b, b^2, b^4, ab, ba(b^2), b^4a(b^2)}
        
        {b, b^2, b^4, b^7, ab, ba(b^2)}
      - {b, b^2, ab, ba(b^2), aba(b^2)} (4 descendants)
        
        {b, b^2, ab, ba(b^2), b^2(a^2)b, aba(b^2)}
        
        {b, b^2, ab, ba(b^2), b^2a(b^2), aba(b^2)}
        
        {b, b^2, ab, ba(b^2), b^3ab, aba(b^2)}
        
        {b, b^2, b^5, ab, ba(b^2), aba(b^2)}
      - {b, b^2, ab, ba(b^2), b^2(a^2)b} (3 descendants)
        
        {b, b^2, ab, ba(b^2), b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, ab, ba(b^2), b^2(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, ba(b^2), b^2(a^2)b}
      - {b, b^2, ab, ba(b^2), b^2a(b^2)} (4 descendants)
        
        {b, b^2, ab, ba(b^2), b^2a(b^2), b^3ab}
        
        {b, b^2, b^5, ab, ba(b^2), b^2a(b^2)}
        
        {b, b^2, ab, ba(b^2), b^2a(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, ab, ba(b^2), b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, ab, ba(b^2), b^3ab} (1 descendant)
        
        {b, b^2, b^5, ab, ba(b^2), b^3ab}
      - {b, b^2, b^5, ab, ba(b^2)} (0 descendants)
    - {b, b^2, ab, b^2ab} (7 descendants)
      - {b, b^2, b^4, ab, b^2ab} (10 descendants)
        
        {b, b^2, b^4, ab, b^2ab, a(b^2)ab}
        
        {b, b^2, b^4, ab, a(b^4), b^2ab}
        
        {b, b^2, b^4, ab, b^2ab, b^2(a^2)b}
        
        {b, b^2, b^4, ab, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^4, ab, b^2ab, b^3ab}
        
        {b, b^2, b^4, b^5, ab, b^2ab}
        
        {b, b^2, b^4, ab, b^2ab, b^2a(b^2)ab}
        
        {b, b^2, b^4, ab, b^2ab, b^2a(b^4)}
        
        {b, b^2, b^4, ab, b^2ab, b^5ab}
        
        {b, b^2, b^4, b^7, ab, b^2ab}
      - {b, b^2, ab, b^2ab, a(b^2)ab} (5 descendants)
        
        {b, b^2, ab, b^2ab, b^2(a^2)b, a(b^2)ab}
        
        {b, b^2, ab, b^2ab, b^2a(b^2), a(b^2)ab}
        
        {b, b^2, ab, b^2ab, b^3ab, a(b^2)ab}
        
        {b, b^2, b^5, ab, b^2ab, a(b^2)ab}
        
        {b, b^2, ab, b^2ab, a(b^2)ab, b^2a(b^2)ab}
      - {b, b^2, ab, b^2ab, b^2(a^2)b} (4 descendants)
        
        {b, b^2, ab, b^2ab, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, ab, b^2ab, b^2(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, b^2ab, b^2(a^2)b}
        
        {b, b^2, ab, b^2ab, b^2(a^2)b, b^2a(b^2)ab}
      - {b, b^2, ab, b^2ab, b^2a(b^2)} (4 descendants)
        
        {b, b^2, ab, b^2ab, b^2a(b^2), b^3ab}
        
        {b, b^2, b^5, ab, b^2ab, b^2a(b^2)}
        
        {b, b^2, ab, b^2ab, b^2a(b^2), b^2a(b^2)ab}
        
        {b, b^2, ab, b^2ab, b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, ab, b^2ab, b^3ab} (2 descendants)
        
        {b, b^2, b^5, ab, b^2ab, b^3ab}
        
        {b, b^2, ab, b^2ab, b^3ab, b^2a(b^2)ab}
      - {b, b^2, b^5, ab, b^2ab} (1 descendant)
        
        {b, b^2, b^5, ab, b^2ab, b^2a(b^2)ab}
      - {b, b^2, ab, b^2ab, b^2a(b^2)ab} (0 descendants)
    - {b, b^2, b^4, ab} (6 descendants)
      - {b, b^2, b^4, ab, a(b^4)} (5 descendants)
        
        {b, b^2, b^4, ab, a(b^4), b^2(a^2)b}
        
        {b, b^2, b^4, ab, a(b^4), b^2a(b^2)}
        
        {b, b^2, b^4, ab, a(b^4), b^3ab}
        
        {b, b^2, b^4, b^5, ab, a(b^4)}
        
        {b, b^2, b^4, b^7, ab, a(b^4)}
      - {b, b^2, b^4, ab, b^2(a^2)b} (4 descendants)
        
        {b, b^2, b^4, ab, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, b^4, ab, b^2(a^2)b, b^3ab}
        
        {b, b^2, b^4, b^5, ab, b^2(a^2)b}
        
        {b, b^2, b^4, b^7, ab, b^2(a^2)b}
      - {b, b^2, b^4, ab, b^2a(b^2)} (3 descendants)
        
        {b, b^2, b^4, ab, b^2a(b^2), b^3ab}
        
        {b, b^2, b^4, b^5, ab, b^2a(b^2)}
        
        {b, b^2, b^4, b^7, ab, b^2a(b^2)}
      - {b, b^2, b^4, ab, b^3ab} (2 descendants)
        
        {b, b^2, b^4, b^5, ab, b^3ab}
        
        {b, b^2, b^4, b^7, ab, b^3ab}
      - {b, b^2, b^4, b^5, ab} (2 descendants)
        
        {b, b^2, b^4, b^5, b^7, ab}
        
        {b, b^2, b^4, b^5, b^8, ab}
      - {b, b^2, b^4, b^7, ab} (0 descendants)
    - {b, b^2, ab, b^2(a^2)b} (3 descendants)
      - {b, b^2, ab, b^2a(b^2), b^2(a^2)b} (2 descendants)
        
        {b, b^2, ab, b^2a(b^2), b^2(a^2)b, b^3ab}
        
        {b, b^2, b^5, ab, b^2a(b^2), b^2(a^2)b}
      - {b, b^2, ab, b^2(a^2)b, b^3ab} (1 descendant)
        
        {b, b^2, b^5, ab, b^2(a^2)b, b^3ab}
      - {b, b^2, b^5, ab, b^2(a^2)b} (0 descendants)
    - {b, b^2, ab, b^2a(b^2)} (2 descendants)
      - {b, b^2, ab, b^2a(b^2), b^3ab} (1 descendant)
        
        {b, b^2, b^5, ab, b^2a(b^2), b^3ab}
      - {b, b^2, b^5, ab, b^2a(b^2)} (0 descendants)
    - {b, b^2, ab, b^3ab} (1 descendant)
      - {b, b^2, b^5, ab, b^3ab} (0 descendants)
    - {b, b^2, b^5, ab} (0 descendants)
  - {b, ab, a^2b} (7 descendants)
    - {b, ab, a^2b, bab} (9 descendants)
      - {b, b^3, ab, a^2b, bab} (11 descendants)
        
        {b, b^3, ab, a^2b, a^3b, bab}
        
        {b, b^3, ab, a^2b, bab, abab}
        
        {b, b^3, ab, a(b^3), a^2b, bab}
        
        {b, b^3, ab, a^2b, bab, b(a^2)b}
        
        {b, b^3, ab, a^2b, bab, b^2ab}
        
        {b, b^3, ab, a^2b, bab, b(a^3)b}
        
        {b, b^3, ab, a^2b, bab, babab}
        
        {b, b^3, ab, a^2b, bab, ba(b^3)}
        
        {b, b^3, ab, a^2b, bab, b^2(a^2)b}
        
        {b, b^3, ab, a^2b, bab, b^3ab}
        
        {b, b^3, b^5, ab, a^2b, bab}
      - {b, ab, a^2b, a^3b, bab} (10 descendants)
        
        {b, ab, a^2b, a^3b, bab, abab}
        
        {b, ab, a^2b, a^3b, bab, b(a^2)b}
        
        {b, ab, a^2b, a^3b, bab, b^2ab}
        
        {b, ab, a^2b, a^3b, a^4b, bab}
        
        {b, ab, a^2b, a^3b, bab, b(a^3)b}
        
        {b, ab, a^2b, a^3b, bab, babab}
        
        {b, ab, a^2b, a^3b, bab, b^2(a^2)b}
        
        {b, ab, a^2b, a^3b, bab, b^3ab}
        
        {b, ab, a^2b, a^3b, bab, b(a^4)b}
        
        {b, ab, a^2b, a^3b, bab, b^2(a^3)b}
      - {b, ab, a^2b, bab, abab} (9 descendants)
        
        {b, ab, a^2b, bab, b(a^2)b, abab}
        
        {b, ab, a^2b, bab, b^2ab, abab}
        
        {b, ab, a^2b, bab, abab, a^2bab}
        
        {b, ab, a^2b, bab, b(a^3)b, abab}
        
        {b, ab, a^2b, bab, abab, babab}
        
        {b, ab, a^2b, bab, b^2(a^2)b, abab}
        
        {b, ab, a^2b, bab, b^3ab, abab}
        
        {b, ab, a^2b, bab, abab, b(a^2)bab}
        
        {b, ab, a^2b, bab, abab, b^2abab}
      - {b, ab, a^2b, bab, b(a^2)b} (8 descendants)
        
        {b, ab, a^2b, bab, b(a^2)b, b^2ab}
        
        {b, ab, a^2b, bab, b(a^2)b, ab(a^2)b}
        
        {b, ab, a^2b, bab, b(a^2)b, b(a^3)b}
        
        {b, ab, a^2b, bab, b(a^2)b, babab}
        
        {b, ab, a^2b, bab, b(a^2)b, b^2(a^2)b}
        
        {b, ab, a^2b, bab, b(a^2)b, b^3ab}
        
        {b, ab, a^2b, bab, b(a^2)b, bab(a^2)b}
        
        {b, ab, a^2b, bab, b(a^2)b, b^3(a^2)b}
      - {b, ab, a^2b, bab, b^2ab} (7 descendants)
        
        {b, ab, a^2b, bab, b^2ab, a(b^2)ab}
        
        {b, ab, a^2b, bab, b(a^3)b, b^2ab}
        
        {b, ab, a^2b, bab, b^2ab, babab}
        
        {b, ab, a^2b, bab, b^2ab, b^2(a^2)b}
        
        {b, ab, a^2b, bab, b^2ab, b^3ab}
        
        {b, ab, a^2b, bab, b^2ab, ba(b^2)ab}
        
        {b, ab, a^2b, bab, b^2ab, b^4ab}
      - {b, ab, a^2b, bab, b(a^3)b} (5 descendants)
        
        {b, ab, a^2b, bab, b(a^3)b, babab}
        
        {b, ab, a^2b, bab, b(a^3)b, b^2(a^2)b}
        
        {b, ab, a^2b, bab, b(a^3)b, b^3ab}
        
        {b, ab, a^2b, bab, b(a^3)b, ab(a^3)b}
        
        {b, ab, a^2b, bab, b(a^3)b, bab(a^3)b}
      - {b, ab, a^2b, bab, babab} (4 descendants)
        
        {b, ab, a^2b, bab, b^2(a^2)b, babab}
        
        {b, ab, a^2b, bab, b^3ab, babab}
        
        {b, ab, a^2b, bab, babab, ababab}
        
        {b, ab, a^2b, bab, babab, bababab}
      - {b, ab, a^2b, bab, b^2(a^2)b} (3 descendants)
        
        {b, ab, a^2b, bab, b^2(a^2)b, b^3ab}
        
        {b, ab, a^2b, bab, b^2(a^2)b, a(b^2)(a^2)b}
        
        {b, ab, a^2b, bab, b^2(a^2)b, ba(b^2)(a^2)b}
      - {b, ab, a^2b, bab, b^3ab} (2 descendants)
        
        {b, ab, a^2b, bab, b^3ab, a(b^3)ab}
        
        {b, ab, a^2b, bab, b^3ab, ba(b^3)ab}
    - {b, b^3, ab, a^2b} (7 descendants)
      - {b, b^3, ab, a^2b, a^3b} (9 descendants)
        
        {b, b^3, ab, a(b^3), a^2b, a^3b}
        
        {b, b^3, ab, a^2b, a^3b, b(a^2)b}
        
        {b, b^3, ab, a^2b, a^3b, b^2ab}
        
        {b, b^3, ab, a^2b, a^3b, a^4b}
        
        {b, b^3, ab, a^2b, a^3b, b(a^3)b}
        
        {b, b^3, ab, a^2b, a^3b, b^2(a^2)b}
        
        {b, b^3, b^5, ab, a^2b, a^3b}
        
        {b, b^3, ab, a^2b, a^3b, b(a^4)b}
        
        {b, b^3, ab, a^2b, a^3b, b^2(a^3)b}
      - {b, b^3, ab, a(b^3), a^2b} (6 descendants)
        
        {b, b^3, ab, a(b^3), a^2b, b(a^2)b}
        
        {b, b^3, ab, a(b^3), a^2b, b^2ab}
        
        {b, b^3, ab, a(b^3), a^2b, a^2(b^3)}
        
        {b, b^3, ab, a(b^3), a^2b, b(a^3)b}
        
        {b, b^3, ab, a(b^3), a^2b, b^2(a^2)b}
        
        {b, b^3, b^5, ab, a(b^3), a^2b}
      - {b, b^3, ab, a^2b, b(a^2)b} (7 descendants)
        
        {b, b^3, ab, a^2b, b(a^2)b, b^2ab}
        
        {b, b^3, ab, a^2b, b(a^2)b, ab(a^2)b}
        
        {b, b^3, ab, a^2b, b(a^2)b, b(a^3)b}
        
        {b, b^3, ab, a^2b, b(a^2)b, b^2(a^2)b}
        
        {b, b^3, b^5, ab, a^2b, b(a^2)b}
        
        {b, b^3, ab, a^2b, b(a^2)b, bab(a^2)b}
        
        {b, b^3, ab, a^2b, b(a^2)b, b^3(a^2)b}
      - {b, b^3, ab, a^2b, b^2ab} (5 descendants)
        
        {b, b^3, ab, a^2b, b^2ab, a(b^2)ab}
        
        {b, b^3, ab, a^2b, b(a^3)b, b^2ab}
        
        {b, b^3, ab, a^2b, b^2ab, b^2(a^2)b}
        
        {b, b^3, b^5, ab, a^2b, b^2ab}
        
        {b, b^3, ab, a^2b, b^2ab, b^4ab}
      - {b, b^3, ab, a^2b, b(a^3)b} (4 descendants)
        
        {b, b^3, ab, a^2b, b(a^3)b, b^2(a^2)b}
        
        {b, b^3, b^5, ab, a^2b, b(a^3)b}
        
        {b, b^3, ab, a^2b, b(a^3)b, ab(a^3)b}
        
        {b, b^3, ab, a^2b, b(a^3)b, b^3(a^3)b}
      - {b, b^3, ab, a^2b, b^2(a^2)b} (3 descendants)
        
        {b, b^3, b^5, ab, a^2b, b^2(a^2)b}
        
        {b, b^3, ab, a^2b, b^2(a^2)b, a(b^2)(a^2)b}
        
        {b, b^3, ab, a^2b, b^2(a^2)b, b^4(a^2)b}
      - {b, b^3, b^5, ab, a^2b} (1 descendant)
        
        {b, b^3, b^5, b^7, ab, a^2b}
    - {b, ab, a^2b, a^3b} (7 descendants)
      - {b, ab, a^2b, a^3b, b(a^2)b} (9 descendants)
        
        {b, ab, a^2b, a^3b, b(a^2)b, b^2ab}
        
        {b, ab, a^2b, a^3b, a^4b, b(a^2)b}
        
        {b, ab, a^2b, a^3b, b(a^2)b, ab(a^2)b}
        
        {b, ab, a^2b, a^3b, b(a^2)b, b(a^3)b}
        
        {b, ab, a^2b, a^3b, b(a^2)b, b^2(a^2)b}
        
        {b, ab, a^2b, a^3b, b(a^2)b, b(a^4)b}
        
        {b, ab, a^2b, a^3b, b(a^2)b, bab(a^2)b}
        
        {b, ab, a^2b, a^3b, b(a^2)b, b^2(a^3)b}
        
        {b, ab, a^2b, a^3b, b(a^2)b, b^3(a^2)b}
      - {b, ab, a^2b, a^3b, b^2ab} (6 descendants)
        
        {b, ab, a^2b, a^3b, a^4b, b^2ab}
        
        {b, ab, a^2b, a^3b, b^2ab, a(b^2)ab}
        
        {b, ab, a^2b, a^3b, b(a^3)b, b^2ab}
        
        {b, ab, a^2b, a^3b, b^2ab, b^2(a^2)b}
        
        {b, ab, a^2b, a^3b, b(a^4)b, b^2ab}
        
        {b, ab, a^2b, a^3b, b^2ab, b^2(a^3)b}
      - {b, ab, a^2b, a^3b, a^4b} (7 descendants)
        
        {b, ab, a^2b, a^3b, a^4b, b(a^3)b}
        
        {b, ab, a^2b, a^3b, a^4b, b^2(a^2)b}
        
        {b, ab, a^2b, a^3b, a^4b, a^5b}
        
        {b, ab, a^2b, a^3b, a^4b, b(a^4)b}
        
        {b, ab, a^2b, a^3b, a^4b, b^2(a^3)b}
        
        {b, ab, a^2b, a^3b, a^4b, b(a^5)b}
        
        {b, ab, a^2b, a^3b, a^4b, b^2(a^4)b}
      - {b, ab, a^2b, a^3b, b(a^3)b} (6 descendants)
        
        {b, ab, a^2b, a^3b, b(a^3)b, b^2(a^2)b}
        
        {b, ab, a^2b, a^3b, b(a^3)b, ab(a^3)b}
        
        {b, ab, a^2b, a^3b, b(a^3)b, b(a^4)b}
        
        {b, ab, a^2b, a^3b, b(a^3)b, b^2(a^3)b}
        
        {b, ab, a^2b, a^3b, b(a^3)b, bab(a^3)b}
        
        {b, ab, a^2b, a^3b, b(a^3)b, b^3(a^3)b}
      - {b, ab, a^2b, a^3b, b^2(a^2)b} (3 descendants)
        
        {b, ab, a^2b, a^3b, b^2(a^2)b, a(b^2)(a^2)b}
        
        {b, ab, a^2b, a^3b, b(a^4)b, b^2(a^2)b}
        
        {b, ab, a^2b, a^3b, b^2(a^2)b, b^2(a^3)b}
      - {b, ab, a^2b, a^3b, b(a^4)b} (2 descendants)
        
        {b, ab, a^2b, a^3b, b(a^4)b, b^2(a^3)b}
        
        {b, ab, a^2b, a^3b, b(a^4)b, ab(a^4)b}
      - {b, ab, a^2b, a^3b, b^2(a^3)b} (1 descendant)
        
        {b, ab, a^2b, a^3b, b^2(a^3)b, a(b^2)(a^3)b}
    - {b, ab, a^2b, b(a^2)b} (6 descendants)
      - {b, ab, a^2b, b(a^2)b, b^2ab} (6 descendants)
        
        {b, ab, a^2b, b(a^2)b, b^2ab, ab(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, b^2ab, a(b^2)ab}
        
        {b, ab, a^2b, b(a^2)b, b(a^3)b, b^2ab}
        
        {b, ab, a^2b, b(a^2)b, b^2ab, b^2(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, b^2ab, bab(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, b^2ab, b^3(a^2)b}
      - {b, ab, a^2b, b(a^2)b, ab(a^2)b} (7 descendants)
        
        {b, ab, a^2b, b(a^2)b, b(a^3)b, ab(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, b^2(a^2)b, ab(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, ab(a^2)b, a^2b(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, ab(a^2)b, bab(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, b^3(a^2)b, ab(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, ab(a^2)b, b(a^2)b(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, ab(a^2)b, b^2ab(a^2)b}
      - {b, ab, a^2b, b(a^2)b, b(a^3)b} (4 descendants)
        
        {b, ab, a^2b, b(a^2)b, b(a^3)b, b^2(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, b(a^3)b, ab(a^3)b}
        
        {b, ab, a^2b, b(a^2)b, b(a^3)b, bab(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, b(a^3)b, b^3(a^2)b}
      - {b, ab, a^2b, b(a^2)b, b^2(a^2)b} (5 descendants)
        
        {b, ab, a^2b, b(a^2)b, b^2(a^2)b, a(b^2)(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, b^2(a^2)b, bab(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, b^2(a^2)b, b^3(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, b^2(a^2)b, ba(b^2)(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, b^2(a^2)b, b^4(a^2)b}
      - {b, ab, a^2b, b(a^2)b, bab(a^2)b} (2 descendants)
        
        {b, ab, a^2b, b(a^2)b, b^3(a^2)b, bab(a^2)b}
        
        {b, ab, a^2b, b(a^2)b, bab(a^2)b, abab(a^2)b}
      - {b, ab, a^2b, b(a^2)b, b^3(a^2)b} (1 descendant)
        
        {b, ab, a^2b, b(a^2)b, b^3(a^2)b, a(b^3)(a^2)b}
    - {b, ab, a^2b, b^2ab} (3 descendants)
      - {b, ab, a^2b, b^2ab, a(b^2)ab} (4 descendants)
        
        {b, ab, a^2b, b(a^3)b, b^2ab, a(b^2)ab}
        
        {b, ab, a^2b, b^2ab, b^2(a^2)b, a(b^2)ab}
        
        {b, ab, a^2b, b^2ab, a(b^2)ab, a^2(b^2)ab}
        
        {b, ab, a^2b, b^2ab, a(b^2)ab, b^2a(b^2)ab}
      - {b, ab, a^2b, b(a^3)b, b^2ab} (2 descendants)
        
        {b, ab, a^2b, b(a^3)b, b^2ab, b^2(a^2)b}
        
        {b, ab, a^2b, b(a^3)b, b^2ab, ab(a^3)b}
      - {b, ab, a^2b, b^2ab, b^2(a^2)b} (1 descendant)
        
        {b, ab, a^2b, b^2ab, b^2(a^2)b, a(b^2)(a^2)b}
    - {b, ab, a^2b, b(a^3)b} (2 descendants)
      - {b, ab, a^2b, b(a^3)b, b^2(a^2)b} (2 descendants)
        
        {b, ab, a^2b, b(a^3)b, b^2(a^2)b, ab(a^3)b}
        
        {b, ab, a^2b, b(a^3)b, b^2(a^2)b, a(b^2)(a^2)b}
      - {b, ab, a^2b, b(a^3)b, ab(a^3)b} (1 descendant)
        
        {b, ab, a^2b, b(a^3)b, ab(a^3)b, a^2b(a^3)b}
    - {b, ab, a^2b, b^2(a^2)b} (1 descendant)
      - {b, ab, a^2b, b^2(a^2)b, a(b^2)(a^2)b} (1 descendant)
        
        {b, ab, a^2b, b^2(a^2)b, a(b^2)(a^2)b, a^2(b^2)(a^2)b}
  - {b, ab, bab} (6 descendants)
    - {b, b^3, ab, bab} (8 descendants)
      - {b, b^3, ab, bab, abab} (10 descendants)
        
        {b, b^3, ab, a(b^3), bab, abab}
        
        {b, b^3, ab, bab, b(a^2)b, abab}
        
        {b, b^3, ab, bab, b^2ab, abab}
        
        {b, b^3, ab, bab, abab, a^2bab}
        
        {b, b^3, ab, bab, abab, babab}
        
        {b, b^3, ab, bab, ba(b^3), abab}
        
        {b, b^3, ab, bab, b^3ab, abab}
        
        {b, b^3, b^5, ab, bab, abab}
        
        {b, b^3, ab, bab, abab, b(a^2)bab}
        
        {b, b^3, ab, bab, abab, b^2abab}
      - {b, b^3, ab, a(b^3), bab} (6 descendants)
        
        {b, b^3, ab, a(b^3), bab, b(a^2)b}
        
        {b, b^3, ab, a(b^3), bab, b^2ab}
        
        {b, b^3, ab, a(b^3), bab, babab}
        
        {b, b^3, ab, a(b^3), bab, ba(b^3)}
        
        {b, b^3, ab, a(b^3), bab, b^3ab}
        
        {b, b^3, b^5, ab, a(b^3), bab}
      - {b, b^3, ab, bab, b(a^2)b} (8 descendants)
        
        {b, b^3, ab, bab, b(a^2)b, b^2ab}
        
        {b, b^3, ab, bab, b(a^2)b, ab(a^2)b}
        
        {b, b^3, ab, bab, b(a^2)b, babab}
        
        {b, b^3, ab, bab, ba(b^3), b(a^2)b}
        
        {b, b^3, ab, bab, b(a^2)b, b^3ab}
        
        {b, b^3, b^5, ab, bab, b(a^2)b}
        
        {b, b^3, ab, bab, b(a^2)b, bab(a^2)b}
        
        {b, b^3, ab, bab, b(a^2)b, b^3(a^2)b}
      - {b, b^3, ab, bab, b^2ab} (7 descendants)
        
        {b, b^3, ab, bab, b^2ab, a(b^2)ab}
        
        {b, b^3, ab, bab, b^2ab, babab}
        
        {b, b^3, ab, bab, ba(b^3), b^2ab}
        
        {b, b^3, ab, bab, b^2ab, b^3ab}
        
        {b, b^3, b^5, ab, bab, b^2ab}
        
        {b, b^3, ab, bab, b^2ab, ba(b^2)ab}
        
        {b, b^3, ab, bab, b^2ab, b^4ab}
      - {b, b^3, ab, bab, babab} (6 descendants)
        
        {b, b^3, ab, bab, ba(b^3), babab}
        
        {b, b^3, ab, bab, b^3ab, babab}
        
        {b, b^3, b^5, ab, bab, babab}
        
        {b, b^3, ab, bab, babab, ababab}
        
        {b, b^3, ab, bab, babab, bababab}
        
        {b, b^3, ab, bab, babab, b^3abab}
      - {b, b^3, ab, bab, ba(b^3)} (2 descendants)
        
        {b, b^3, ab, bab, ba(b^3), b^3ab}
        
        {b, b^3, b^5, ab, bab, ba(b^3)}
      - {b, b^3, ab, bab, b^3ab} (4 descendants)
        
        {b, b^3, b^5, ab, bab, b^3ab}
        
        {b, b^3, ab, bab, b^3ab, a(b^3)ab}
        
        {b, b^3, ab, bab, b^3ab, ba(b^3)ab}
        
        {b, b^3, ab, bab, b^3ab, b^5ab}
      - {b, b^3, b^5, ab, bab} (1 descendant)
        
        {b, b^3, b^5, b^7, ab, bab}
    - {b, ab, bab, abab} (7 descendants)
      - {b, ab, bab, b(a^2)b, abab} (8 descendants)
        
        {b, ab, bab, b(a^2)b, b^2ab, abab}
        
        {b, ab, bab, b(a^2)b, abab, a^2bab}
        
        {b, ab, bab, b(a^2)b, abab, ab(a^2)b}
        
        {b, ab, bab, b(a^2)b, abab, babab}
        
        {b, ab, bab, b(a^2)b, b^3ab, abab}
        
        {b, ab, bab, b(a^2)b, abab, b(a^2)bab}
        
        {b, ab, bab, b(a^2)b, abab, bab(a^2)b}
        
        {b, ab, bab, b(a^2)b, abab, b^2abab}
      - {b, ab, bab, b^2ab, abab} (8 descendants)
        
        {b, ab, bab, b^2ab, abab, a^2bab}
        
        {b, ab, bab, b^2ab, abab, a(b^2)ab}
        
        {b, ab, bab, b^2ab, abab, babab}
        
        {b, ab, bab, b^2ab, b^3ab, abab}
        
        {b, ab, bab, b^2ab, abab, b(a^2)bab}
        
        {b, ab, bab, b^2ab, abab, ba(b^2)ab}
        
        {b, ab, bab, b^2ab, abab, b^2abab}
        
        {b, ab, bab, b^2ab, b^4ab, abab}
      - {b, ab, bab, abab, a^2bab} (7 descendants)
        
        {b, ab, bab, abab, a^2bab, babab}
        
        {b, ab, bab, b^3ab, abab, a^2bab}
        
        {b, ab, bab, abab, a^2bab, a^3bab}
        
        {b, ab, bab, abab, a^2bab, b(a^2)bab}
        
        {b, ab, bab, abab, a^2bab, b^2abab}
        
        {b, ab, bab, abab, a^2bab, b(a^3)bab}
        
        {b, ab, bab, abab, a^2bab, b^2(a^2)bab}
      - {b, ab, bab, abab, babab} (6 descendants)
        
        {b, ab, bab, b^3ab, abab, babab}
        
        {b, ab, bab, abab, babab, ababab}
        
        {b, ab, bab, abab, babab, b(a^2)bab}
        
        {b, ab, bab, abab, babab, b^2abab}
        
        {b, ab, bab, abab, babab, bababab}
        
        {b, ab, bab, abab, babab, b^3abab}
      - {b, ab, bab, b^3ab, abab} (4 descendants)
        
        {b, ab, bab, b^3ab, abab, a(b^3)ab}
        
        {b, ab, bab, b^3ab, abab, b(a^2)bab}
        
        {b, ab, bab, b^3ab, abab, b^2abab}
        
        {b, ab, bab, b^3ab, abab, ba(b^3)ab}
      - {b, ab, bab, abab, b(a^2)bab} (3 descendants)
        
        {b, ab, bab, abab, b(a^2)bab, b^2abab}
        
        {b, ab, bab, abab, b(a^2)bab, ab(a^2)bab}
        
        {b, ab, bab, abab, b(a^2)bab, bab(a^2)bab}
      - {b, ab, bab, abab, b^2abab} (2 descendants)
        
        {b, ab, bab, abab, b^2abab, a(b^2)abab}
        
        {b, ab, bab, abab, b^2abab, ba(b^2)abab}
    - {b, ab, bab, b(a^2)b} (5 descendants)
      - {b, ab, bab, b(a^2)b, b^2ab} (7 descendants)
        
        {b, ab, bab, b(a^2)b, b^2ab, ab(a^2)b}
        
        {b, ab, bab, b(a^2)b, b^2ab, a(b^2)ab}
        
        {b, ab, bab, b(a^2)b, b^2ab, babab}
        
        {b, ab, bab, b(a^2)b, b^2ab, b^3ab}
        
        {b, ab, bab, b(a^2)b, b^2ab, bab(a^2)b}
        
        {b, ab, bab, b(a^2)b, b^2ab, ba(b^2)ab}
        
        {b, ab, bab, b(a^2)b, b^2ab, b^4ab}
      - {b, ab, bab, b(a^2)b, ab(a^2)b} (4 descendants)
        
        {b, ab, bab, b(a^2)b, ab(a^2)b, babab}
        
        {b, ab, bab, b(a^2)b, b^3ab, ab(a^2)b}
        
        {b, ab, bab, b(a^2)b, ab(a^2)b, bab(a^2)b}
        
        {b, ab, bab, b(a^2)b, ab(a^2)b, b(a^2)b(a^2)b}
      - {b, ab, bab, b(a^2)b, babab} (4 descendants)
        
        {b, ab, bab, b(a^2)b, b^3ab, babab}
        
        {b, ab, bab, b(a^2)b, babab, ababab}
        
        {b, ab, bab, b(a^2)b, babab, bab(a^2)b}
        
        {b, ab, bab, b(a^2)b, babab, bababab}
      - {b, ab, bab, b(a^2)b, b^3ab} (3 descendants)
        
        {b, ab, bab, b(a^2)b, b^3ab, a(b^3)ab}
        
        {b, ab, bab, b(a^2)b, b^3ab, bab(a^2)b}
        
        {b, ab, bab, b(a^2)b, b^3ab, ba(b^3)ab}
      - {b, ab, bab, b(a^2)b, bab(a^2)b} (0 descendants)
    - {b, ab, bab, b^2ab} (5 descendants)
      - {b, ab, bab, b^2ab, a(b^2)ab} (7 descendants)
        
        {b, ab, bab, b^2ab, a(b^2)ab, babab}
        
        {b, ab, bab, b^2ab, b^3ab, a(b^2)ab}
        
        {b, ab, bab, b^2ab, a(b^2)ab, a^2(b^2)ab}
        
        {b, ab, bab, b^2ab, a(b^2)ab, ba(b^2)ab}
        
        {b, ab, bab, b^2ab, b^4ab, a(b^2)ab}
        
        {b, ab, bab, b^2ab, a(b^2)ab, b(a^2)(b^2)ab}
        
        {b, ab, bab, b^2ab, a(b^2)ab, b^2a(b^2)ab}
      - {b, ab, bab, b^2ab, babab} (5 descendants)
        
        {b, ab, bab, b^2ab, b^3ab, babab}
        
        {b, ab, bab, b^2ab, babab, ababab}
        
        {b, ab, bab, b^2ab, babab, ba(b^2)ab}
        
        {b, ab, bab, b^2ab, b^4ab, babab}
        
        {b, ab, bab, b^2ab, babab, bababab}
      - {b, ab, bab, b^2ab, b^3ab} (5 descendants)
        
        {b, ab, bab, b^2ab, b^3ab, a(b^3)ab}
        
        {b, ab, bab, b^2ab, b^3ab, ba(b^2)ab}
        
        {b, ab, bab, b^2ab, b^3ab, b^4ab}
        
        {b, ab, bab, b^2ab, b^3ab, ba(b^3)ab}
        
        {b, ab, bab, b^2ab, b^3ab, b^5ab}
      - {b, ab, bab, b^2ab, ba(b^2)ab} (3 descendants)
        
        {b, ab, bab, b^2ab, b^4ab, ba(b^2)ab}
        
        {b, ab, bab, b^2ab, ba(b^2)ab, aba(b^2)ab}
        
        {b, ab, bab, b^2ab, ba(b^2)ab, baba(b^2)ab}
      - {b, ab, bab, b^2ab, b^4ab} (2 descendants)
        
        {b, ab, bab, b^2ab, b^4ab, a(b^4)ab}
        
        {b, ab, bab, b^2ab, b^4ab, ba(b^4)ab}
    - {b, ab, bab, babab} (3 descendants)
      - {b, ab, bab, b^3ab, babab} (4 descendants)
        
        {b, ab, bab, b^3ab, babab, ababab}
        
        {b, ab, bab, b^3ab, a(b^3)ab, babab}
        
        {b, ab, bab, b^3ab, babab, bababab}
        
        {b, ab, bab, b^3ab, babab, ba(b^3)ab}
      - {b, ab, bab, babab, ababab} (1 descendant)
        
        {b, ab, bab, babab, ababab, bababab}
      - {b, ab, bab, babab, bababab} (1 descendant)
        
        {b, ab, bab, babab, bababab, babababab}
    - {b, ab, bab, b^3ab} (2 descendants)
      - {b, ab, bab, b^3ab, a(b^3)ab} (1 descendant)
        
        {b, ab, bab, b^3ab, a(b^3)ab, ba(b^3)ab}
      - {b, ab, bab, b^3ab, ba(b^3)ab} (0 descendants)
  - {b, b^3, ab} (4 descendants)
    - {b, b^3, ab, a(b^3)} (3 descendants)
      - {b, b^3, ab, a(b^3), b(a^2)b} (5 descendants)
        
        {b, b^3, ab, a(b^3), b(a^2)b, b^2ab}
        
        {b, b^3, ab, a(b^3), b(a^2)b, ab(a^2)b}
        
        {b, b^3, b^5, ab, a(b^3), b(a^2)b}
        
        {b, b^3, ab, a(b^3), b(a^2)b, b(a^2)(b^3)}
        
        {b, b^3, ab, a(b^3), b(a^2)b, b^3(a^2)b}
      - {b, b^3, ab, a(b^3), b^2ab} (4 descendants)
        
        {b, b^3, ab, a(b^3), b^2ab, a(b^2)ab}
        
        {b, b^3, b^5, ab, a(b^3), b^2ab}
        
        {b, b^3, ab, a(b^3), b^2ab, b^2a(b^3)}
        
        {b, b^3, ab, a(b^3), b^2ab, b^4ab}
      - {b, b^3, b^5, ab, a(b^3)} (2 descendants)
        
        {b, b^3, b^5, ab, a(b^3), a(b^5)}
        
        {b, b^3, b^5, b^7, ab, a(b^3)}
    - {b, b^3, ab, b(a^2)b} (4 descendants)
      - {b, b^3, ab, b(a^2)b, b^2ab} (5 descendants)
        
        {b, b^3, ab, b(a^2)b, b^2ab, ab(a^2)b}
        
        {b, b^3, ab, b(a^2)b, b^2ab, a(b^2)ab}
        
        {b, b^3, b^5, ab, b(a^2)b, b^2ab}
        
        {b, b^3, ab, b(a^2)b, b^2ab, b^3(a^2)b}
        
        {b, b^3, ab, b(a^2)b, b^2ab, b^4ab}
      - {b, b^3, ab, b(a^2)b, ab(a^2)b} (3 descendants)
        
        {b, b^3, b^5, ab, b(a^2)b, ab(a^2)b}
        
        {b, b^3, ab, b(a^2)b, b^3(a^2)b, ab(a^2)b}
        
        {b, b^3, ab, b(a^2)b, ab(a^2)b, b(a^2)b(a^2)b}
      - {b, b^3, b^5, ab, b(a^2)b} (2 descendants)
        
        {b, b^3, b^5, ab, b(a^2)b, b^3(a^2)b}
        
        {b, b^3, b^5, b^7, ab, b(a^2)b}
      - {b, b^3, ab, b(a^2)b, b^3(a^2)b} (0 descendants)
    - {b, b^3, ab, b^2ab} (3 descendants)
      - {b, b^3, ab, b^2ab, a(b^2)ab} (3 descendants)
        
        {b, b^3, b^5, ab, b^2ab, a(b^2)ab}
        
        {b, b^3, ab, b^2ab, b^4ab, a(b^2)ab}
        
        {b, b^3, ab, b^2ab, a(b^2)ab, b^2a(b^2)ab}
      - {b, b^3, b^5, ab, b^2ab} (2 descendants)
        
        {b, b^3, b^5, ab, b^2ab, b^4ab}
        
        {b, b^3, b^5, b^7, ab, b^2ab}
      - {b, b^3, ab, b^2ab, b^4ab} (0 descendants)
    - {b, b^3, b^5, ab} (1 descendant)
      - {b, b^3, b^5, b^7, ab} (1 descendant)
        
        {b, b^3, b^5, b^7, b^9, ab}
  - {b, ab, b(a^2)b} (2 descendants)
    - {b, ab, b(a^2)b, b^2ab} (2 descendants)
      - {b, ab, b(a^2)b, b^2ab, ab(a^2)b} (3 descendants)
        
        {b, ab, b(a^2)b, b^2ab, ab(a^2)b, a(b^2)ab}
        
        {b, ab, b(a^2)b, b^2ab, ab(a^2)b, b(a^2)b(a^2)b}
        
        {b, ab, b(a^2)b, b^2ab, ab(a^2)b, b^2ab(a^2)b}
      - {b, ab, b(a^2)b, b^2ab, a(b^2)ab} (2 descendants)
        
        {b, ab, b(a^2)b, b^2ab, a(b^2)ab, b(a^2)(b^2)ab}
        
        {b, ab, b(a^2)b, b^2ab, a(b^2)ab, b^2a(b^2)ab}
    - {b, ab, b(a^2)b, ab(a^2)b} (1 descendant)
      - {b, ab, b(a^2)b, ab(a^2)b, b(a^2)b(a^2)b} (1 descendant)
        
        {b, ab, b(a^2)b, ab(a^2)b, b(a^2)b(a^2)b, ab(a^2)b(a^2)b}
  - {b, ab, b^2ab} (1 descendant)
    - {b, ab, b^2ab, a(b^2)ab} (1 descendant)
      - {b, ab, b^2ab, a(b^2)ab, b^2a(b^2)ab} (1 descendant)
        
        {b, ab, b^2ab, a(b^2)ab, b^2a(b^2)ab, a(b^2)a(b^2)ab}
- {b, ba} (6 descendants)
  - {b, b^2, ba} (13 descendants)
    - {b, b^2, a(b^2), ba} (17 descendants)
      - {b, b^2, a(b^2), ba, b(a^2)} (21 descendants)
        
        {b, b^2, a(b^2), ba, b(a^2), bab}
        
        {b, b^2, a(b^2), ba, b(a^2), b^2a}
        
        {b, b^2, b^3, a(b^2), ba, b(a^2)}
        
        {b, b^2, a(b^2), ba, b(a^2), a^2(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2), b(a^3)}
        
        {b, b^2, a(b^2), ba, b(a^2), b(a^2)b}
        
        {b, b^2, a(b^2), ba, b(a^2), ba(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2), b^2ab}
        
        {b, b^2, b^4, a(b^2), ba, b(a^2)}
        
        {b, b^2, a(b^2), ba, b(a^2), b(a^3)b}
        
        {b, b^2, a(b^2), ba, b(a^2), b(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2), ba(b^3)}
        
        {b, b^2, a(b^2), ba, b(a^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, b(a^2)}
        
        {b, b^2, a(b^2), ba, b(a^2), b(a^3)(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2), b(a^2)(b^3)}
        
        {b, b^2, a(b^2), ba, b(a^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2), b(a^4)(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2), b(a^2)ba(b^2)}
      - {b, b^2, a(b^2), ba, bab} (20 descendants)
        
        {b, b^2, a(b^2), ba, b^2a, bab}
        
        {b, b^2, b^3, a(b^2), ba, bab}
        
        {b, b^2, a(b^2), ba, a^2(b^2), bab}
        
        {b, b^2, a(b^2), ba, bab, b(a^2)b}
        
        {b, b^2, a(b^2), ba, bab, baba}
        
        {b, b^2, a(b^2), ba, bab, ba(b^2)}
        
        {b, b^2, a(b^2), ba, bab, b^2ab}
        
        {b, b^2, b^4, a(b^2), ba, bab}
        
        {b, b^2, a(b^2), ba, bab, b(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, bab, babab}
        
        {b, b^2, a(b^2), ba, bab, ba(b^3)}
        
        {b, b^2, a(b^2), ba, bab, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, bab}
        
        {b, b^2, a(b^2), ba, bab, b(a^3)(b^2)}
        
        {b, b^2, a(b^2), ba, bab, baba(b^2)}
        
        {b, b^2, a(b^2), ba, bab, ba(b^4)}
        
        {b, b^2, a(b^2), ba, bab, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, bab, b^3a(b^2)}
        
        {b, b^2, a(b^2), ba, bab, bab(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, bab, ba(b^2)a(b^2)}
      - {b, b^2, a(b^2), ba, b^2a} (20 descendants)
        
        {b, b^2, b^3, a(b^2), ba, b^2a}
        
        {b, b^2, a(b^2), ba, a^2(b^2), b^2a}
        
        {b, b^2, a(b^2), ba, b^2a, a(b^2)a}
        
        {b, b^2, a(b^2), ba, b^2a, b(a^2)b}
        
        {b, b^2, a(b^2), ba, b^2a, ba(b^2)}
        
        {b, b^2, a(b^2), ba, b^2a, b^2(a^2)}
        
        {b, b^2, a(b^2), ba, b^2a, b^2ab}
        
        {b, b^2, b^4, a(b^2), ba, b^2a}
        
        {b, b^2, a(b^2), ba, b^2a, b(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, b^2a, ba(b^3)}
        
        {b, b^2, a(b^2), ba, b^2a, b^2(a^2)b}
        
        {b, b^2, a(b^2), ba, b^2a, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, b^2a}
        
        {b, b^2, a(b^2), ba, b^2a, b(a^3)(b^2)}
        
        {b, b^2, a(b^2), ba, b^2a, baba(b^2)}
        
        {b, b^2, a(b^2), ba, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, b^2a, b^2a(b^3)}
        
        {b, b^2, a(b^2), ba, b^2a, b^3a(b^2)}
        
        {b, b^2, a(b^2), ba, b^2a, b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), ba, b^2a, b^2aba(b^2)}
      - {b, b^2, b^3, a(b^2), ba} (24 descendants)
        
        {b, b^2, b^3, a(b^2), ba, a^2(b^2)}
        
        {b, b^2, b^3, a(b^2), a(b^3), ba}
        
        {b, b^2, b^3, a(b^2), ba, b(a^2)b}
        
        {b, b^2, b^3, a(b^2), ba, ba(b^2)}
        
        {b, b^2, b^3, a(b^2), ba, b^2ab}
        
        {b, b^2, b^3, a(b^2), ba, b^3a}
        
        {b, b^2, b^3, b^4, a(b^2), ba}
        
        {b, b^2, b^3, a(b^2), ba, b(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), ba, ba(b^3)}
        
        {b, b^2, b^3, a(b^2), ba, b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), ba, b^3ab}
        
        {b, b^2, b^3, b^5, a(b^2), ba}
        
        {b, b^2, b^3, a(b^2), ba, b(a^3)(b^2)}
        
        {b, b^2, b^3, a(b^2), ba, b(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^2), ba, baba(b^2)}
        
        {b, b^2, b^3, a(b^2), ba, ba(b^4)}
        
        {b, b^2, b^3, a(b^2), ba, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), ba, b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), ba, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), ba}
        
        {b, b^2, b^3, a(b^2), ba, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), ba, b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), ba, b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), ba}
      - {b, b^2, a(b^2), ba, a^2(b^2)} (17 descendants)
        
        {b, b^2, a(b^2), ba, a^2(b^2), b(a^2)b}
        
        {b, b^2, a(b^2), ba, a^2(b^2), ba(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), b^2ab}
        
        {b, b^2, b^4, a(b^2), ba, a^2(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), a^3(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), b(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), ba(b^3)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, a^2(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), b(a^3)(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), b(a^4)(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), bab(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), ba, a^2(b^2), b^3(a^2)(b^2)}
      - {b, b^2, a(b^2), ba, b(a^2)b} (12 descendants)
        
        {b, b^2, a(b^2), ba, ba(b^2), b(a^2)b}
        
        {b, b^2, a(b^2), ba, b(a^2)b, b^2ab}
        
        {b, b^2, b^4, a(b^2), ba, b(a^2)b}
        
        {b, b^2, a(b^2), ba, b(a^2)b, b(a^2)ba}
        
        {b, b^2, a(b^2), ba, b(a^2)b, b(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^3), b(a^2)b}
        
        {b, b^2, a(b^2), ba, b(a^2)b, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, b(a^2)b}
        
        {b, b^2, a(b^2), ba, b(a^2)b, b(a^3)(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2)b, baba(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2)b, b^3a(b^2)}
      - {b, b^2, a(b^2), ba, ba(b^2)} (16 descendants)
        
        {b, b^2, a(b^2), ba, ba(b^2), b^2ab}
        
        {b, b^2, b^4, a(b^2), ba, ba(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^2), aba(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^2), ba(b^2)a}
        
        {b, b^2, a(b^2), ba, ba(b^2), ba(b^3)}
        
        {b, b^2, a(b^2), ba, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, ba(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^2), b(a^3)(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^2), b(a^2)ba(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^2), b^4a(b^2)}
      - {b, b^2, a(b^2), ba, b^2ab} (10 descendants)
        
        {b, b^2, b^4, a(b^2), ba, b^2ab}
        
        {b, b^2, a(b^2), ba, b(a^2)(b^2), b^2ab}
        
        {b, b^2, a(b^2), ba, ba(b^3), b^2ab}
        
        {b, b^2, a(b^2), ba, b^2ab, b^2aba}
        
        {b, b^2, a(b^2), ba, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, b^2ab}
        
        {b, b^2, a(b^2), ba, b(a^3)(b^2), b^2ab}
        
        {b, b^2, a(b^2), ba, b^2ab, baba(b^2)}
        
        {b, b^2, a(b^2), ba, b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, b^2ab, b^3a(b^2)}
      - {b, b^2, b^4, a(b^2), ba} (10 descendants)
        
        {b, b^2, b^4, a(b^2), ba, b(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), ba, ba(b^3)}
        
        {b, b^2, b^4, a(b^2), ba, b^2a(b^2)}
        
        {b, b^2, b^4, a(b^2), ba, b^4a}
        
        {b, b^2, b^4, b^5, a(b^2), ba}
        
        {b, b^2, b^4, a(b^2), ba, b(a^3)(b^2)}
        
        {b, b^2, b^4, a(b^2), ba, baba(b^2)}
        
        {b, b^2, b^4, a(b^2), ba, b^2(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), ba, b^3a(b^2)}
        
        {b, b^2, b^4, b^7, a(b^2), ba}
      - {b, b^2, a(b^2), ba, b(a^2)(b^2)} (7 descendants)
        
        {b, b^2, a(b^2), ba, ba(b^3), b(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, b(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2)(b^2), b(a^3)(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2)(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^2)(b^2), b^3a(b^2)}
      - {b, b^2, a(b^2), ba, ba(b^3)} (6 descendants)
        
        {b, b^2, a(b^2), ba, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, ba(b^3)}
        
        {b, b^2, a(b^2), ba, ba(b^3), b(a^3)(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^3), baba(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, ba(b^3), b^3a(b^2)}
      - {b, b^2, a(b^2), ba, b^2a(b^2)} (5 descendants)
        
        {b, b^2, b^5, a(b^2), ba, b^2a(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^3)(b^2), b^2a(b^2)}
        
        {b, b^2, a(b^2), ba, b^2a(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba, b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, b^2a(b^2), b^3a(b^2)}
      - {b, b^2, b^5, a(b^2), ba} (4 descendants)
        
        {b, b^2, b^5, a(b^2), ba, b(a^3)(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, baba(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, b^2(a^2)(b^2)}
        
        {b, b^2, b^5, a(b^2), ba, b^3a(b^2)}
      - {b, b^2, a(b^2), ba, b(a^3)(b^2)} (3 descendants)
        
        {b, b^2, a(b^2), ba, b(a^3)(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^3)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba, b(a^3)(b^2), b^3a(b^2)}
      - {b, b^2, a(b^2), ba, baba(b^2)} (2 descendants)
        
        {b, b^2, a(b^2), ba, b^2(a^2)(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba, b^3a(b^2), baba(b^2)}
      - {b, b^2, a(b^2), ba, b^2(a^2)(b^2)} (1 descendant)
        
        {b, b^2, a(b^2), ba, b^2(a^2)(b^2), b^3a(b^2)}
      - {b, b^2, a(b^2), ba, b^3a(b^2)} (0 descendants)
    - {b, b^2, ba, b(a^2)} (15 descendants)
      - {b, b^2, ba, b(a^2), bab} (18 descendants)
        
        {b, b^2, ba, b(a^2), b^2a, bab}
        
        {b, b^2, b^3, ba, b(a^2), bab}
        
        {b, b^2, ba, b(a^2), b(a^3), bab}
        
        {b, b^2, ba, b(a^2), bab, b(a^2)b}
        
        {b, b^2, ba, b(a^2), bab, baba}
        
        {b, b^2, ba, b(a^2), bab, ba(b^2)}
        
        {b, b^2, ba, b(a^2), bab, b^2ab}
        
        {b, b^2, b^4, ba, b(a^2), bab}
        
        {b, b^2, ba, b(a^2), bab, b(a^3)b}
        
        {b, b^2, ba, b(a^2), bab, b(a^2)(b^2)}
        
        {b, b^2, ba, b(a^2), bab, babab}
        
        {b, b^2, ba, b(a^2), bab, ba(b^3)}
        
        {b, b^2, ba, b(a^2), bab, b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2), bab}
        
        {b, b^2, ba, b(a^2), bab, b(a^3)(b^2)}
        
        {b, b^2, ba, b(a^2), bab, b(a^2)(b^3)}
        
        {b, b^2, ba, b(a^2), bab, baba(b^2)}
        
        {b, b^2, ba, b(a^2), bab, ba(b^4)}
      - {b, b^2, ba, b(a^2), b^2a} (17 descendants)
        
        {b, b^2, b^3, ba, b(a^2), b^2a}
        
        {b, b^2, ba, b(a^2), b(a^3), b^2a}
        
        {b, b^2, ba, b(a^2), b^2a, b(a^2)b}
        
        {b, b^2, ba, b(a^2), b^2a, ba(b^2)}
        
        {b, b^2, ba, b(a^2), b^2a, b^2(a^2)}
        
        {b, b^2, ba, b(a^2), b^2a, b^2ab}
        
        {b, b^2, b^4, ba, b(a^2), b^2a}
        
        {b, b^2, ba, b(a^2), b^2a, b(a^3)b}
        
        {b, b^2, ba, b(a^2), b^2a, b(a^2)(b^2)}
        
        {b, b^2, ba, b(a^2), b^2a, ba(b^3)}
        
        {b, b^2, ba, b(a^2), b^2a, b^2(a^2)b}
        
        {b, b^2, ba, b(a^2), b^2a, b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2), b^2a}
        
        {b, b^2, ba, b(a^2), b^2a, b(a^3)(b^2)}
        
        {b, b^2, ba, b(a^2), b^2a, b(a^2)(b^3)}
        
        {b, b^2, ba, b(a^2), b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, ba, b(a^2), b^2a, b^2a(b^3)}
      - {b, b^2, b^3, ba, b(a^2)} (23 descendants)
        
        {b, b^2, b^3, a(b^3), ba, b(a^2)}
        
        {b, b^2, b^3, ba, b(a^2), b(a^3)}
        
        {b, b^2, b^3, ba, b(a^2), b(a^2)b}
        
        {b, b^2, b^3, ba, b(a^2), ba(b^2)}
        
        {b, b^2, b^3, ba, b(a^2), b^2ab}
        
        {b, b^2, b^3, ba, b(a^2), b^3a}
        
        {b, b^2, b^3, b^4, ba, b(a^2)}
        
        {b, b^2, b^3, ba, b(a^2), b(a^3)b}
        
        {b, b^2, b^3, ba, b(a^2), b(a^2)(b^2)}
        
        {b, b^2, b^3, ba, b(a^2), ba(b^3)}
        
        {b, b^2, b^3, ba, b(a^2), b^2a(b^2)}
        
        {b, b^2, b^3, ba, b(a^2), b^3ab}
        
        {b, b^2, b^3, b^5, ba, b(a^2)}
        
        {b, b^2, b^3, ba, b(a^2), b(a^3)(b^2)}
        
        {b, b^2, b^3, ba, b(a^2), b(a^2)(b^3)}
        
        {b, b^2, b^3, ba, b(a^2), ba(b^4)}
        
        {b, b^2, b^3, ba, b(a^2), b^2a(b^3)}
        
        {b, b^2, b^3, ba, b(a^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, b(a^2)}
        
        {b, b^2, b^3, ba, b(a^2), b(a^3)(b^3)}
        
        {b, b^2, b^3, ba, b(a^2), b(a^2)(b^4)}
        
        {b, b^2, b^3, ba, b(a^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, b(a^2)}
      - {b, b^2, ba, b(a^2), b(a^3)} (15 descendants)
        
        {b, b^2, ba, b(a^2), b(a^3), b(a^2)b}
        
        {b, b^2, ba, b(a^2), b(a^3), ba(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^3), b^2ab}
        
        {b, b^2, b^4, ba, b(a^2), b(a^3)}
        
        {b, b^2, ba, b(a^2), b(a^3), b(a^4)}
        
        {b, b^2, ba, b(a^2), b(a^3), b(a^3)b}
        
        {b, b^2, ba, b(a^2), b(a^3), b(a^2)(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^3), ba(b^3)}
        
        {b, b^2, ba, b(a^2), b(a^3), b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2), b(a^3)}
        
        {b, b^2, ba, b(a^2), b(a^3), b(a^4)b}
        
        {b, b^2, ba, b(a^2), b(a^3), b(a^3)(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^3), b(a^2)(b^3)}
        
        {b, b^2, ba, b(a^2), b(a^3), b(a^4)(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^3), b(a^3)(b^3)}
      - {b, b^2, ba, b(a^2), b(a^2)b} (14 descendants)
        
        {b, b^2, ba, b(a^2), ba(b^2), b(a^2)b}
        
        {b, b^2, ba, b(a^2), b(a^2)b, b^2ab}
        
        {b, b^2, b^4, ba, b(a^2), b(a^2)b}
        
        {b, b^2, ba, b(a^2), b(a^2)b, b(a^3)b}
        
        {b, b^2, ba, b(a^2), b(a^2)b, b(a^2)ba}
        
        {b, b^2, ba, b(a^2), b(a^2)b, b(a^2)(b^2)}
        
        {b, b^2, ba, b(a^2), ba(b^3), b(a^2)b}
        
        {b, b^2, ba, b(a^2), b(a^2)b, b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2), b(a^2)b}
        
        {b, b^2, ba, b(a^2), b(a^2)b, b(a^3)(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^2)b, b(a^2)bab}
        
        {b, b^2, ba, b(a^2), b(a^2)b, b(a^2)(b^3)}
        
        {b, b^2, ba, b(a^2), b(a^2)b, b(a^2)ba(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^2)b, b(a^2)(b^4)}
      - {b, b^2, ba, b(a^2), ba(b^2)} (11 descendants)
        
        {b, b^2, ba, b(a^2), ba(b^2), b^2ab}
        
        {b, b^2, b^4, ba, b(a^2), ba(b^2)}
        
        {b, b^2, ba, b(a^2), ba(b^2), b(a^3)b}
        
        {b, b^2, ba, b(a^2), ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, ba, b(a^2), ba(b^2), ba(b^2)a}
        
        {b, b^2, ba, b(a^2), ba(b^2), ba(b^3)}
        
        {b, b^2, ba, b(a^2), ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2), ba(b^2)}
        
        {b, b^2, ba, b(a^2), ba(b^2), b(a^3)(b^2)}
        
        {b, b^2, ba, b(a^2), ba(b^2), b(a^2)(b^3)}
        
        {b, b^2, ba, b(a^2), ba(b^2), ba(b^2)a(b^2)}
      - {b, b^2, ba, b(a^2), b^2ab} (9 descendants)
        
        {b, b^2, b^4, ba, b(a^2), b^2ab}
        
        {b, b^2, ba, b(a^2), b(a^3)b, b^2ab}
        
        {b, b^2, ba, b(a^2), b(a^2)(b^2), b^2ab}
        
        {b, b^2, ba, b(a^2), ba(b^3), b^2ab}
        
        {b, b^2, ba, b(a^2), b^2ab, b^2aba}
        
        {b, b^2, ba, b(a^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2), b^2ab}
        
        {b, b^2, ba, b(a^2), b(a^3)(b^2), b^2ab}
        
        {b, b^2, ba, b(a^2), b(a^2)(b^3), b^2ab}
      - {b, b^2, b^4, ba, b(a^2)} (9 descendants)
        
        {b, b^2, b^4, ba, b(a^2), b(a^3)b}
        
        {b, b^2, b^4, ba, b(a^2), b(a^2)(b^2)}
        
        {b, b^2, b^4, ba, b(a^2), ba(b^3)}
        
        {b, b^2, b^4, ba, b(a^2), b^2a(b^2)}
        
        {b, b^2, b^4, ba, b(a^2), b^4a}
        
        {b, b^2, b^4, b^5, ba, b(a^2)}
        
        {b, b^2, b^4, ba, b(a^2), b(a^3)(b^2)}
        
        {b, b^2, b^4, ba, b(a^2), b(a^2)(b^3)}
        
        {b, b^2, b^4, b^7, ba, b(a^2)}
      - {b, b^2, ba, b(a^2), b(a^3)b} (7 descendants)
        
        {b, b^2, ba, b(a^2), b(a^2)(b^2), b(a^3)b}
        
        {b, b^2, ba, b(a^2), ba(b^3), b(a^3)b}
        
        {b, b^2, ba, b(a^2), b(a^3)b, b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2), b(a^3)b}
        
        {b, b^2, ba, b(a^2), b(a^3)b, b(a^3)ba}
        
        {b, b^2, ba, b(a^2), b(a^3)b, b(a^3)(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^2)(b^3), b(a^3)b}
      - {b, b^2, ba, b(a^2), b(a^2)(b^2)} (6 descendants)
        
        {b, b^2, ba, b(a^2), ba(b^3), b(a^2)(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2), b(a^2)(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^2)(b^2), b(a^3)(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^2)(b^2), b(a^2)(b^2)a}
        
        {b, b^2, ba, b(a^2), b(a^2)(b^2), b(a^2)(b^3)}
      - {b, b^2, ba, b(a^2), ba(b^3)} (4 descendants)
        
        {b, b^2, ba, b(a^2), ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2), ba(b^3)}
        
        {b, b^2, ba, b(a^2), ba(b^3), b(a^3)(b^2)}
        
        {b, b^2, ba, b(a^2), ba(b^3), b(a^2)(b^3)}
      - {b, b^2, ba, b(a^2), b^2a(b^2)} (3 descendants)
        
        {b, b^2, b^5, ba, b(a^2), b^2a(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^3)(b^2), b^2a(b^2)}
        
        {b, b^2, ba, b(a^2), b(a^2)(b^3), b^2a(b^2)}
      - {b, b^2, b^5, ba, b(a^2)} (2 descendants)
        
        {b, b^2, b^5, ba, b(a^2), b(a^3)(b^2)}
        
        {b, b^2, b^5, ba, b(a^2), b(a^2)(b^3)}
      - {b, b^2, ba, b(a^2), b(a^3)(b^2)} (1 descendant)
        
        {b, b^2, ba, b(a^2), b(a^2)(b^3), b(a^3)(b^2)}
      - {b, b^2, ba, b(a^2), b(a^2)(b^3)} (0 descendants)
    - {b, b^2, ba, bab} (14 descendants)
      - {b, b^2, ba, b^2a, bab} (17 descendants)
        
        {b, b^2, b^3, ba, b^2a, bab}
        
        {b, b^2, ba, b^2a, bab, b(a^2)b}
        
        {b, b^2, ba, b^2a, bab, baba}
        
        {b, b^2, ba, b^2a, bab, ba(b^2)}
        
        {b, b^2, ba, b^2a, b^2(a^2), bab}
        
        {b, b^2, ba, b^2a, bab, b^2ab}
        
        {b, b^2, b^4, ba, b^2a, bab}
        
        {b, b^2, ba, b^2a, bab, b(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, bab, babab}
        
        {b, b^2, ba, b^2a, bab, ba(b^3)}
        
        {b, b^2, ba, b^2a, bab, b^2(a^2)b}
        
        {b, b^2, ba, b^2a, bab, b^2a(b^2)}
        
        {b, b^2, b^5, ba, b^2a, bab}
        
        {b, b^2, ba, b^2a, bab, baba(b^2)}
        
        {b, b^2, ba, b^2a, bab, ba(b^4)}
        
        {b, b^2, ba, b^2a, bab, b^2(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, bab, b^2a(b^3)}
      - {b, b^2, b^3, ba, bab} (23 descendants)
        
        {b, b^2, b^3, a(b^3), ba, bab}
        
        {b, b^2, b^3, ba, bab, b(a^2)b}
        
        {b, b^2, b^3, ba, bab, baba}
        
        {b, b^2, b^3, ba, bab, ba(b^2)}
        
        {b, b^2, b^3, ba, bab, b^2ab}
        
        {b, b^2, b^3, ba, b^3a, bab}
        
        {b, b^2, b^3, b^4, ba, bab}
        
        {b, b^2, b^3, ba, bab, b(a^2)(b^2)}
        
        {b, b^2, b^3, ba, bab, babab}
        
        {b, b^2, b^3, ba, bab, ba(b^3)}
        
        {b, b^2, b^3, ba, bab, b^2a(b^2)}
        
        {b, b^2, b^3, ba, bab, b^3ab}
        
        {b, b^2, b^3, b^5, ba, bab}
        
        {b, b^2, b^3, ba, bab, b(a^2)(b^3)}
        
        {b, b^2, b^3, ba, bab, baba(b^2)}
        
        {b, b^2, b^3, ba, bab, ba(b^4)}
        
        {b, b^2, b^3, ba, bab, b^2a(b^3)}
        
        {b, b^2, b^3, ba, bab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, bab}
        
        {b, b^2, b^3, ba, bab, baba(b^3)}
        
        {b, b^2, b^3, ba, bab, ba(b^5)}
        
        {b, b^2, b^3, ba, bab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, bab}
      - {b, b^2, ba, bab, b(a^2)b} (13 descendants)
        
        {b, b^2, ba, bab, b(a^2)b, baba}
        
        {b, b^2, ba, bab, ba(b^2), b(a^2)b}
        
        {b, b^2, ba, bab, b(a^2)b, b^2ab}
        
        {b, b^2, b^4, ba, bab, b(a^2)b}
        
        {b, b^2, ba, bab, b(a^2)b, b(a^2)ba}
        
        {b, b^2, ba, bab, b(a^2)b, b(a^2)(b^2)}
        
        {b, b^2, ba, bab, b(a^2)b, babab}
        
        {b, b^2, ba, bab, ba(b^3), b(a^2)b}
        
        {b, b^2, ba, bab, b(a^2)b, b^2a(b^2)}
        
        {b, b^2, b^5, ba, bab, b(a^2)b}
        
        {b, b^2, ba, bab, b(a^2)b, b(a^2)bab}
        
        {b, b^2, ba, bab, b(a^2)b, baba(b^2)}
        
        {b, b^2, ba, bab, ba(b^4), b(a^2)b}
      - {b, b^2, ba, bab, baba} (14 descendants)
        
        {b, b^2, ba, bab, ba(b^2), baba}
        
        {b, b^2, ba, bab, b^2ab, baba}
        
        {b, b^2, b^4, ba, bab, baba}
        
        {b, b^2, ba, bab, b(a^2)(b^2), baba}
        
        {b, b^2, ba, bab, baba, bab(a^2)}
        
        {b, b^2, ba, bab, baba, babab}
        
        {b, b^2, ba, bab, ba(b^3), baba}
        
        {b, b^2, ba, bab, b^2a(b^2), baba}
        
        {b, b^2, b^5, ba, bab, baba}
        
        {b, b^2, ba, bab, baba, bab(a^2)b}
        
        {b, b^2, ba, bab, baba, baba(b^2)}
        
        {b, b^2, ba, bab, ba(b^4), baba}
        
        {b, b^2, ba, bab, baba, bab(a^2)(b^2)}
        
        {b, b^2, ba, bab, baba, baba(b^3)}
      - {b, b^2, ba, bab, ba(b^2)} (13 descendants)
        
        {b, b^2, ba, bab, ba(b^2), b^2ab}
        
        {b, b^2, b^4, ba, bab, ba(b^2)}
        
        {b, b^2, ba, bab, ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, ba, bab, ba(b^2), babab}
        
        {b, b^2, ba, bab, ba(b^2), ba(b^2)a}
        
        {b, b^2, ba, bab, ba(b^2), ba(b^3)}
        
        {b, b^2, ba, bab, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, ba, bab, ba(b^2)}
        
        {b, b^2, ba, bab, ba(b^2), baba(b^2)}
        
        {b, b^2, ba, bab, ba(b^2), ba(b^2)ab}
        
        {b, b^2, ba, bab, ba(b^2), ba(b^4)}
        
        {b, b^2, ba, bab, ba(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, ba, bab, ba(b^2), ba(b^5)}
      - {b, b^2, ba, bab, b^2ab} (10 descendants)
        
        {b, b^2, b^4, ba, bab, b^2ab}
        
        {b, b^2, ba, bab, b(a^2)(b^2), b^2ab}
        
        {b, b^2, ba, bab, b^2ab, babab}
        
        {b, b^2, ba, bab, ba(b^3), b^2ab}
        
        {b, b^2, ba, bab, b^2ab, b^2aba}
        
        {b, b^2, ba, bab, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, ba, bab, b^2ab}
        
        {b, b^2, ba, bab, b^2ab, baba(b^2)}
        
        {b, b^2, ba, bab, ba(b^4), b^2ab}
        
        {b, b^2, ba, bab, b^2ab, b^2abab}
      - {b, b^2, b^4, ba, bab} (10 descendants)
        
        {b, b^2, b^4, ba, bab, b(a^2)(b^2)}
        
        {b, b^2, b^4, ba, bab, babab}
        
        {b, b^2, b^4, ba, bab, ba(b^3)}
        
        {b, b^2, b^4, ba, bab, b^2a(b^2)}
        
        {b, b^2, b^4, ba, b^4a, bab}
        
        {b, b^2, b^4, b^5, ba, bab}
        
        {b, b^2, b^4, ba, bab, baba(b^2)}
        
        {b, b^2, b^4, ba, bab, ba(b^4)}
        
        {b, b^2, b^4, ba, bab, b^4ab}
        
        {b, b^2, b^4, b^7, ba, bab}
      - {b, b^2, ba, bab, b(a^2)(b^2)} (6 descendants)
        
        {b, b^2, ba, bab, b(a^2)(b^2), babab}
        
        {b, b^2, ba, bab, ba(b^3), b(a^2)(b^2)}
        
        {b, b^2, ba, bab, b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, ba, bab, b(a^2)(b^2)}
        
        {b, b^2, ba, bab, b(a^2)(b^2), baba(b^2)}
        
        {b, b^2, ba, bab, ba(b^4), b(a^2)(b^2)}
      - {b, b^2, ba, bab, babab} (7 descendants)
        
        {b, b^2, ba, bab, ba(b^3), babab}
        
        {b, b^2, ba, bab, b^2a(b^2), babab}
        
        {b, b^2, b^5, ba, bab, babab}
        
        {b, b^2, ba, bab, babab, bababa}
        
        {b, b^2, ba, bab, babab, baba(b^2)}
        
        {b, b^2, ba, bab, ba(b^4), babab}
        
        {b, b^2, ba, bab, babab, bababab}
      - {b, b^2, ba, bab, ba(b^3)} (6 descendants)
        
        {b, b^2, ba, bab, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^5, ba, bab, ba(b^3)}
        
        {b, b^2, ba, bab, ba(b^3), baba(b^2)}
        
        {b, b^2, ba, bab, ba(b^3), ba(b^3)a}
        
        {b, b^2, ba, bab, ba(b^3), ba(b^4)}
        
        {b, b^2, ba, bab, ba(b^3), ba(b^3)ab}
      - {b, b^2, ba, bab, b^2a(b^2)} (3 descendants)
        
        {b, b^2, b^5, ba, bab, b^2a(b^2)}
        
        {b, b^2, ba, bab, b^2a(b^2), baba(b^2)}
        
        {b, b^2, ba, bab, ba(b^4), b^2a(b^2)}
      - {b, b^2, b^5, ba, bab} (2 descendants)
        
        {b, b^2, b^5, ba, bab, baba(b^2)}
        
        {b, b^2, b^5, ba, bab, ba(b^4)}
      - {b, b^2, ba, bab, baba(b^2)} (1 descendant)
        
        {b, b^2, ba, bab, ba(b^4), baba(b^2)}
      - {b, b^2, ba, bab, ba(b^4)} (0 descendants)
    - {b, b^2, ba, b^2a} (13 descendants)
      - {b, b^2, b^3, ba, b^2a} (23 descendants)
        
        {b, b^2, b^3, a(b^3), ba, b^2a}
        
        {b, b^2, b^3, ba, b^2a, b(a^2)b}
        
        {b, b^2, b^3, ba, b^2a, ba(b^2)}
        
        {b, b^2, b^3, ba, b^2a, b^2(a^2)}
        
        {b, b^2, b^3, ba, b^2a, b^2ab}
        
        {b, b^2, b^3, ba, b^2a, b^3a}
        
        {b, b^2, b^3, b^4, ba, b^2a}
        
        {b, b^2, b^3, ba, b^2a, b(a^2)(b^2)}
        
        {b, b^2, b^3, ba, b^2a, ba(b^3)}
        
        {b, b^2, b^3, ba, b^2a, b^2(a^2)b}
        
        {b, b^2, b^3, ba, b^2a, b^2a(b^2)}
        
        {b, b^2, b^3, ba, b^2a, b^3ab}
        
        {b, b^2, b^3, b^5, ba, b^2a}
        
        {b, b^2, b^3, ba, b^2a, b(a^2)(b^3)}
        
        {b, b^2, b^3, ba, b^2a, ba(b^4)}
        
        {b, b^2, b^3, ba, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, ba, b^2a, b^2a(b^3)}
        
        {b, b^2, b^3, ba, b^2a, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, b^2a}
        
        {b, b^2, b^3, ba, b^2a, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, ba, b^2a, b^2a(b^4)}
        
        {b, b^2, b^3, ba, b^2a, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, b^2a}
      - {b, b^2, ba, b^2a, b(a^2)b} (12 descendants)
        
        {b, b^2, ba, b^2a, ba(b^2), b(a^2)b}
        
        {b, b^2, ba, b^2a, b^2(a^2), b(a^2)b}
        
        {b, b^2, ba, b^2a, b(a^2)b, b^2ab}
        
        {b, b^2, b^4, ba, b^2a, b(a^2)b}
        
        {b, b^2, ba, b^2a, b(a^2)b, b(a^2)ba}
        
        {b, b^2, ba, b^2a, b(a^2)b, b(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, ba(b^3), b(a^2)b}
        
        {b, b^2, ba, b^2a, b(a^2)b, b^2(a^2)b}
        
        {b, b^2, ba, b^2a, b(a^2)b, b^2a(b^2)}
        
        {b, b^2, b^5, ba, b^2a, b(a^2)b}
        
        {b, b^2, ba, b^2a, b(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, b(a^2)b, b^2a(b^3)}
      - {b, b^2, ba, b^2a, ba(b^2)} (12 descendants)
        
        {b, b^2, ba, b^2a, b^2(a^2), ba(b^2)}
        
        {b, b^2, ba, b^2a, ba(b^2), b^2ab}
        
        {b, b^2, b^4, ba, b^2a, ba(b^2)}
        
        {b, b^2, ba, b^2a, ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, ba(b^2), ba(b^2)a}
        
        {b, b^2, ba, b^2a, ba(b^2), ba(b^3)}
        
        {b, b^2, ba, b^2a, ba(b^2), b^2(a^2)b}
        
        {b, b^2, ba, b^2a, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, ba, b^2a, ba(b^2)}
        
        {b, b^2, ba, b^2a, ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, ba(b^2), b^2a(b^3)}
        
        {b, b^2, ba, b^2a, ba(b^2), ba(b^2)a(b^2)}
      - {b, b^2, ba, b^2a, b^2(a^2)} (13 descendants)
        
        {b, b^2, ba, b^2a, b^2(a^2), b^2ab}
        
        {b, b^2, b^4, ba, b^2a, b^2(a^2)}
        
        {b, b^2, ba, b^2a, b^2(a^2), b(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, b^2(a^2), ba(b^3)}
        
        {b, b^2, ba, b^2a, b^2(a^2), b^2(a^3)}
        
        {b, b^2, ba, b^2a, b^2(a^2), b^2(a^2)b}
        
        {b, b^2, ba, b^2a, b^2(a^2), b^2a(b^2)}
        
        {b, b^2, b^5, ba, b^2a, b^2(a^2)}
        
        {b, b^2, ba, b^2a, b^2(a^2), b^2(a^3)b}
        
        {b, b^2, ba, b^2a, b^2(a^2), b^2(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, b^2(a^2), b^2a(b^3)}
        
        {b, b^2, ba, b^2a, b^2(a^2), b^2(a^3)(b^2)}
        
        {b, b^2, ba, b^2a, b^2(a^2), b^2(a^2)(b^3)}
      - {b, b^2, ba, b^2a, b^2ab} (12 descendants)
        
        {b, b^2, b^4, ba, b^2a, b^2ab}
        
        {b, b^2, ba, b^2a, b(a^2)(b^2), b^2ab}
        
        {b, b^2, ba, b^2a, ba(b^3), b^2ab}
        
        {b, b^2, ba, b^2a, b^2ab, b^2(a^2)b}
        
        {b, b^2, ba, b^2a, b^2ab, b^2aba}
        
        {b, b^2, ba, b^2a, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, ba, b^2a, b^2ab}
        
        {b, b^2, ba, b^2a, b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, b^2ab, b^2abab}
        
        {b, b^2, ba, b^2a, b^2ab, b^2a(b^3)}
        
        {b, b^2, ba, b^2a, b^2ab, b^2aba(b^2)}
        
        {b, b^2, ba, b^2a, b^2ab, b^2a(b^4)}
      - {b, b^2, b^4, ba, b^2a} (9 descendants)
        
        {b, b^2, b^4, ba, b^2a, b(a^2)(b^2)}
        
        {b, b^2, b^4, ba, b^2a, ba(b^3)}
        
        {b, b^2, b^4, ba, b^2a, b^2(a^2)b}
        
        {b, b^2, b^4, ba, b^2a, b^2a(b^2)}
        
        {b, b^2, b^4, ba, b^2a, b^4a}
        
        {b, b^2, b^4, b^5, ba, b^2a}
        
        {b, b^2, b^4, ba, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^4, ba, b^2a, b^2a(b^3)}
        
        {b, b^2, b^4, b^7, ba, b^2a}
      - {b, b^2, ba, b^2a, b(a^2)(b^2)} (7 descendants)
        
        {b, b^2, ba, b^2a, ba(b^3), b(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, b(a^2)(b^2), b^2(a^2)b}
        
        {b, b^2, ba, b^2a, b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, ba, b^2a, b(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, b(a^2)(b^2), b(a^2)(b^2)a}
        
        {b, b^2, ba, b^2a, b(a^2)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, b(a^2)(b^2), b^2a(b^3)}
      - {b, b^2, ba, b^2a, ba(b^3)} (6 descendants)
        
        {b, b^2, ba, b^2a, ba(b^3), b^2(a^2)b}
        
        {b, b^2, ba, b^2a, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^5, ba, b^2a, ba(b^3)}
        
        {b, b^2, ba, b^2a, ba(b^3), ba(b^3)a}
        
        {b, b^2, ba, b^2a, ba(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, ba(b^3), b^2a(b^3)}
      - {b, b^2, ba, b^2a, b^2(a^2)b} (5 descendants)
        
        {b, b^2, ba, b^2a, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, b^5, ba, b^2a, b^2(a^2)b}
        
        {b, b^2, ba, b^2a, b^2(a^2)b, b^2(a^2)ba}
        
        {b, b^2, ba, b^2a, b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, b^2a(b^3), b^2(a^2)b}
      - {b, b^2, ba, b^2a, b^2a(b^2)} (4 descendants)
        
        {b, b^2, b^5, ba, b^2a, b^2a(b^2)}
        
        {b, b^2, ba, b^2a, b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, b^2a(b^2), b^2a(b^2)a}
        
        {b, b^2, ba, b^2a, b^2a(b^2), b^2a(b^3)}
      - {b, b^2, b^5, ba, b^2a} (3 descendants)
        
        {b, b^2, b^5, ba, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^5, ba, b^2a, b^2a(b^3)}
        
        {b, b^2, b^5, ba, b^2a, b^5a}
      - {b, b^2, ba, b^2a, b^2(a^2)(b^2)} (2 descendants)
        
        {b, b^2, ba, b^2a, b^2a(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, ba, b^2a, b^2(a^2)(b^2), b^2(a^2)(b^2)a}
      - {b, b^2, ba, b^2a, b^2a(b^3)} (1 descendant)
        
        {b, b^2, ba, b^2a, b^2a(b^3), b^2a(b^3)a}
    - {b, b^2, b^3, ba} (18 descendants)
      - {b, b^2, b^3, a(b^3), ba} (23 descendants)
        
        {b, b^2, b^3, a(b^3), ba, b(a^2)b}
        
        {b, b^2, b^3, a(b^3), ba, ba(b^2)}
        
        {b, b^2, b^3, a(b^3), ba, b^2ab}
        
        {b, b^2, b^3, a(b^3), ba, b^3a}
        
        {b, b^2, b^3, b^4, a(b^3), ba}
        
        {b, b^2, b^3, a(b^3), ba, a^2(b^3)}
        
        {b, b^2, b^3, a(b^3), ba, b(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^3), ba, ba(b^3)}
        
        {b, b^2, b^3, a(b^3), ba, b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), ba, b^3ab}
        
        {b, b^2, b^3, b^5, a(b^3), ba}
        
        {b, b^2, b^3, a(b^3), ba, b(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), ba, ba(b^4)}
        
        {b, b^2, b^3, a(b^3), ba, b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), ba, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), ba}
        
        {b, b^2, b^3, a(b^3), ba, b(a^3)(b^3)}
        
        {b, b^2, b^3, a(b^3), ba, baba(b^3)}
        
        {b, b^2, b^3, a(b^3), ba, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), ba, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), ba}
        
        {b, b^2, b^3, a(b^3), ba, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), ba, b^4a(b^3)}
      - {b, b^2, b^3, ba, b(a^2)b} (17 descendants)
        
        {b, b^2, b^3, ba, ba(b^2), b(a^2)b}
        
        {b, b^2, b^3, ba, b(a^2)b, b^2ab}
        
        {b, b^2, b^3, ba, b^3a, b(a^2)b}
        
        {b, b^2, b^3, b^4, ba, b(a^2)b}
        
        {b, b^2, b^3, ba, b(a^2)b, b(a^2)ba}
        
        {b, b^2, b^3, ba, b(a^2)b, b(a^2)(b^2)}
        
        {b, b^2, b^3, ba, ba(b^3), b(a^2)b}
        
        {b, b^2, b^3, ba, b(a^2)b, b^2a(b^2)}
        
        {b, b^2, b^3, ba, b(a^2)b, b^3ab}
        
        {b, b^2, b^3, b^5, ba, b(a^2)b}
        
        {b, b^2, b^3, ba, b(a^2)b, b(a^2)(b^3)}
        
        {b, b^2, b^3, ba, ba(b^4), b(a^2)b}
        
        {b, b^2, b^3, ba, b(a^2)b, b^2a(b^3)}
        
        {b, b^2, b^3, ba, b(a^2)b, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, b(a^2)b}
        
        {b, b^2, b^3, ba, b(a^2)b, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, b(a^2)b}
      - {b, b^2, b^3, ba, ba(b^2)} (17 descendants)
        
        {b, b^2, b^3, ba, ba(b^2), b^2ab}
        
        {b, b^2, b^3, ba, b^3a, ba(b^2)}
        
        {b, b^2, b^3, b^4, ba, ba(b^2)}
        
        {b, b^2, b^3, ba, ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^3, ba, ba(b^2), ba(b^2)a}
        
        {b, b^2, b^3, ba, ba(b^2), ba(b^3)}
        
        {b, b^2, b^3, ba, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, ba, ba(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, ba, ba(b^2)}
        
        {b, b^2, b^3, ba, ba(b^2), b(a^2)(b^3)}
        
        {b, b^2, b^3, ba, ba(b^2), ba(b^4)}
        
        {b, b^2, b^3, ba, ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, ba, ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, ba(b^2)}
        
        {b, b^2, b^3, ba, ba(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, b^3, ba, ba(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, ba(b^2)}
      - {b, b^2, b^3, ba, b^2ab} (15 descendants)
        
        {b, b^2, b^3, ba, b^3a, b^2ab}
        
        {b, b^2, b^3, b^4, ba, b^2ab}
        
        {b, b^2, b^3, ba, b(a^2)(b^2), b^2ab}
        
        {b, b^2, b^3, ba, ba(b^3), b^2ab}
        
        {b, b^2, b^3, ba, b^2ab, b^2aba}
        
        {b, b^2, b^3, ba, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, ba, b^2ab, b^3ab}
        
        {b, b^2, b^3, b^5, ba, b^2ab}
        
        {b, b^2, b^3, ba, b(a^2)(b^3), b^2ab}
        
        {b, b^2, b^3, ba, ba(b^4), b^2ab}
        
        {b, b^2, b^3, ba, b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, ba, b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, b^2ab}
        
        {b, b^2, b^3, ba, b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, b^2ab}
      - {b, b^2, b^3, ba, b^3a} (18 descendants)
        
        {b, b^2, b^3, b^4, ba, b^3a}
        
        {b, b^2, b^3, ba, b^3a, b(a^2)(b^2)}
        
        {b, b^2, b^3, ba, b^3a, ba(b^3)}
        
        {b, b^2, b^3, ba, b^3a, b^2a(b^2)}
        
        {b, b^2, b^3, ba, b^3a, b^3(a^2)}
        
        {b, b^2, b^3, ba, b^3a, b^3ab}
        
        {b, b^2, b^3, b^5, ba, b^3a}
        
        {b, b^2, b^3, ba, b^3a, b(a^2)(b^3)}
        
        {b, b^2, b^3, ba, b^3a, ba(b^4)}
        
        {b, b^2, b^3, ba, b^3a, b^2a(b^3)}
        
        {b, b^2, b^3, ba, b^3a, b^3(a^2)b}
        
        {b, b^2, b^3, ba, b^3a, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, b^3a}
        
        {b, b^2, b^3, ba, b^3a, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, ba, b^3a, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, b^3a}
        
        {b, b^2, b^3, ba, b^3a, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, ba, b^3a, b^3a(b^4)}
      - {b, b^2, b^3, b^4, ba} (24 descendants)
        
        {b, b^2, b^3, b^4, a(b^4), ba}
        
        {b, b^2, b^3, b^4, ba, b(a^2)(b^2)}
        
        {b, b^2, b^3, b^4, ba, ba(b^3)}
        
        {b, b^2, b^3, b^4, ba, b^2a(b^2)}
        
        {b, b^2, b^3, b^4, ba, b^3ab}
        
        {b, b^2, b^3, b^4, ba, b^4a}
        
        {b, b^2, b^3, b^4, b^5, ba}
        
        {b, b^2, b^3, b^4, ba, b(a^2)(b^3)}
        
        {b, b^2, b^3, b^4, ba, ba(b^4)}
        
        {b, b^2, b^3, b^4, ba, b^2a(b^3)}
        
        {b, b^2, b^3, b^4, ba, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, ba, b^4ab}
        
        {b, b^2, b^3, b^4, b^6, ba}
        
        {b, b^2, b^3, b^4, ba, b(a^2)(b^4)}
        
        {b, b^2, b^3, b^4, ba, ba(b^5)}
        
        {b, b^2, b^3, b^4, ba, b^2a(b^4)}
        
        {b, b^2, b^3, b^4, ba, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, ba, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, ba}
        
        {b, b^2, b^3, b^4, ba, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, ba, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, ba}
        
        {b, b^2, b^3, b^4, ba, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, ba}
      - {b, b^2, b^3, ba, b(a^2)(b^2)} (11 descendants)
        
        {b, b^2, b^3, ba, ba(b^3), b(a^2)(b^2)}
        
        {b, b^2, b^3, ba, b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, ba, b(a^2)(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, ba, b(a^2)(b^2)}
        
        {b, b^2, b^3, ba, b(a^2)(b^2), b(a^2)(b^3)}
        
        {b, b^2, b^3, ba, ba(b^4), b(a^2)(b^2)}
        
        {b, b^2, b^3, ba, b(a^2)(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, ba, b(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, b(a^2)(b^2)}
        
        {b, b^2, b^3, ba, b(a^2)(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, b(a^2)(b^2)}
      - {b, b^2, b^3, ba, ba(b^3)} (10 descendants)
        
        {b, b^2, b^3, ba, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, ba, ba(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, ba, ba(b^3)}
        
        {b, b^2, b^3, ba, ba(b^3), b(a^2)(b^3)}
        
        {b, b^2, b^3, ba, ba(b^3), ba(b^4)}
        
        {b, b^2, b^3, ba, ba(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, ba, ba(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, ba(b^3)}
        
        {b, b^2, b^3, ba, ba(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, ba(b^3)}
      - {b, b^2, b^3, ba, b^2a(b^2)} (9 descendants)
        
        {b, b^2, b^3, ba, b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, ba, b^2a(b^2)}
        
        {b, b^2, b^3, ba, b(a^2)(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, ba, ba(b^4), b^2a(b^2)}
        
        {b, b^2, b^3, ba, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, ba, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, b^2a(b^2)}
        
        {b, b^2, b^3, ba, b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, b^2a(b^2)}
      - {b, b^2, b^3, ba, b^3ab} (9 descendants)
        
        {b, b^2, b^3, b^5, ba, b^3ab}
        
        {b, b^2, b^3, ba, b(a^2)(b^3), b^3ab}
        
        {b, b^2, b^3, ba, ba(b^4), b^3ab}
        
        {b, b^2, b^3, ba, b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, ba, b^3ab, b^3aba}
        
        {b, b^2, b^3, ba, b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, b^3ab}
        
        {b, b^2, b^3, ba, b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, b^3ab}
      - {b, b^2, b^3, b^5, ba} (9 descendants)
        
        {b, b^2, b^3, b^5, ba, b(a^2)(b^3)}
        
        {b, b^2, b^3, b^5, ba, ba(b^4)}
        
        {b, b^2, b^3, b^5, ba, b^2a(b^3)}
        
        {b, b^2, b^3, b^5, ba, b^3a(b^2)}
        
        {b, b^2, b^3, b^5, ba, b^5a}
        
        {b, b^2, b^3, b^5, b^6, ba}
        
        {b, b^2, b^3, b^5, ba, b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, ba}
        
        {b, b^2, b^3, b^5, b^9, ba}
      - {b, b^2, b^3, ba, b(a^2)(b^3)} (6 descendants)
        
        {b, b^2, b^3, ba, ba(b^4), b(a^2)(b^3)}
        
        {b, b^2, b^3, ba, b(a^2)(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, ba, b(a^2)(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, b(a^2)(b^3)}
        
        {b, b^2, b^3, ba, b(a^2)(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, b(a^2)(b^3)}
      - {b, b^2, b^3, ba, ba(b^4)} (5 descendants)
        
        {b, b^2, b^3, ba, ba(b^4), b^2a(b^3)}
        
        {b, b^2, b^3, ba, ba(b^4), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, ba(b^4)}
        
        {b, b^2, b^3, ba, ba(b^4), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, ba(b^4)}
      - {b, b^2, b^3, ba, b^2a(b^3)} (4 descendants)
        
        {b, b^2, b^3, ba, b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba, b^2a(b^3)}
        
        {b, b^2, b^3, ba, b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, b^2a(b^3)}
      - {b, b^2, b^3, ba, b^3a(b^2)} (3 descendants)
        
        {b, b^2, b^3, b^6, ba, b^3a(b^2)}
        
        {b, b^2, b^3, ba, b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba, b^3a(b^2)}
      - {b, b^2, b^3, b^6, ba} (2 descendants)
        
        {b, b^2, b^3, b^6, ba, b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, ba}
      - {b, b^2, b^3, ba, b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^7, ba, b^3a(b^3)}
      - {b, b^2, b^3, b^7, ba} (0 descendants)
    - {b, b^2, ba, b(a^2)b} (8 descendants)
      - {b, b^2, ba, ba(b^2), b(a^2)b} (10 descendants)
        
        {b, b^2, ba, ba(b^2), b(a^2)b, b^2ab}
        
        {b, b^2, b^4, ba, ba(b^2), b(a^2)b}
        
        {b, b^2, ba, ba(b^2), b(a^2)b, b(a^2)ba}
        
        {b, b^2, ba, ba(b^2), b(a^2)b, b(a^2)(b^2)}
        
        {b, b^2, ba, ba(b^2), b(a^2)b, ba(b^2)a}
        
        {b, b^2, ba, ba(b^2), ba(b^3), b(a^2)b}
        
        {b, b^2, ba, ba(b^2), b(a^2)b, b^2a(b^2)}
        
        {b, b^2, b^5, ba, ba(b^2), b(a^2)b}
        
        {b, b^2, ba, ba(b^2), b(a^2)b, b(a^2)ba(b^2)}
        
        {b, b^2, ba, ba(b^2), b(a^2)b, ba(b^2)a(b^2)}
      - {b, b^2, ba, b(a^2)b, b^2ab} (7 descendants)
        
        {b, b^2, b^4, ba, b(a^2)b, b^2ab}
        
        {b, b^2, ba, b(a^2)b, b^2ab, b(a^2)ba}
        
        {b, b^2, ba, b(a^2)b, b(a^2)(b^2), b^2ab}
        
        {b, b^2, ba, ba(b^3), b(a^2)b, b^2ab}
        
        {b, b^2, ba, b(a^2)b, b^2ab, b^2aba}
        
        {b, b^2, ba, b(a^2)b, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2)b, b^2ab}
      - {b, b^2, b^4, ba, b(a^2)b} (8 descendants)
        
        {b, b^2, b^4, ba, b(a^2)b, b(a^2)ba}
        
        {b, b^2, b^4, ba, b(a^2)b, b(a^2)(b^2)}
        
        {b, b^2, b^4, ba, ba(b^3), b(a^2)b}
        
        {b, b^2, b^4, ba, b(a^2)b, b^2a(b^2)}
        
        {b, b^2, b^4, ba, b^4a, b(a^2)b}
        
        {b, b^2, b^4, b^5, ba, b(a^2)b}
        
        {b, b^2, b^4, ba, b(a^2)b, b(a^2)(b^4)}
        
        {b, b^2, b^4, b^7, ba, b(a^2)b}
      - {b, b^2, ba, b(a^2)b, b(a^2)ba} (5 descendants)
        
        {b, b^2, ba, b(a^2)b, b(a^2)(b^2), b(a^2)ba}
        
        {b, b^2, ba, ba(b^3), b(a^2)b, b(a^2)ba}
        
        {b, b^2, ba, b(a^2)b, b^2a(b^2), b(a^2)ba}
        
        {b, b^2, b^5, ba, b(a^2)b, b(a^2)ba}
        
        {b, b^2, ba, b(a^2)b, b(a^2)ba, b(a^2)b(a^2)b}
      - {b, b^2, ba, b(a^2)b, b(a^2)(b^2)} (3 descendants)
        
        {b, b^2, ba, ba(b^3), b(a^2)b, b(a^2)(b^2)}
        
        {b, b^2, ba, b(a^2)b, b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2)b, b(a^2)(b^2)}
      - {b, b^2, ba, ba(b^3), b(a^2)b} (2 descendants)
        
        {b, b^2, ba, ba(b^3), b(a^2)b, b^2a(b^2)}
        
        {b, b^2, b^5, ba, ba(b^3), b(a^2)b}
      - {b, b^2, ba, b(a^2)b, b^2a(b^2)} (1 descendant)
        
        {b, b^2, b^5, ba, b(a^2)b, b^2a(b^2)}
      - {b, b^2, b^5, ba, b(a^2)b} (0 descendants)
    - {b, b^2, ba, ba(b^2)} (8 descendants)
      - {b, b^2, ba, ba(b^2), b^2ab} (9 descendants)
        
        {b, b^2, b^4, ba, ba(b^2), b^2ab}
        
        {b, b^2, ba, ba(b^2), b(a^2)(b^2), b^2ab}
        
        {b, b^2, ba, ba(b^2), b^2ab, ba(b^2)a}
        
        {b, b^2, ba, ba(b^2), ba(b^3), b^2ab}
        
        {b, b^2, ba, ba(b^2), b^2ab, b^2aba}
        
        {b, b^2, ba, ba(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, ba, ba(b^2), b^2ab}
        
        {b, b^2, ba, ba(b^2), b^2ab, ba(b^2)a(b^2)}
        
        {b, b^2, ba, ba(b^2), b^2ab, b^2aba(b^2)}
      - {b, b^2, b^4, ba, ba(b^2)} (10 descendants)
        
        {b, b^2, b^4, ba, ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^4, ba, ba(b^2), ba(b^2)a}
        
        {b, b^2, b^4, ba, ba(b^2), ba(b^3)}
        
        {b, b^2, b^4, ba, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, ba, b^4a, ba(b^2)}
        
        {b, b^2, b^4, b^5, ba, ba(b^2)}
        
        {b, b^2, b^4, ba, ba(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, b^4, ba, ba(b^2), ba(b^5)}
        
        {b, b^2, b^4, ba, ba(b^2), b^4a(b^2)}
        
        {b, b^2, b^4, b^7, ba, ba(b^2)}
      - {b, b^2, ba, ba(b^2), b(a^2)(b^2)} (5 descendants)
        
        {b, b^2, ba, ba(b^2), b(a^2)(b^2), ba(b^2)a}
        
        {b, b^2, ba, ba(b^2), ba(b^3), b(a^2)(b^2)}
        
        {b, b^2, ba, ba(b^2), b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, ba, ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, ba, ba(b^2), b(a^2)(b^2), ba(b^2)a(b^2)}
      - {b, b^2, ba, ba(b^2), ba(b^2)a} (4 descendants)
        
        {b, b^2, ba, ba(b^2), ba(b^3), ba(b^2)a}
        
        {b, b^2, ba, ba(b^2), b^2a(b^2), ba(b^2)a}
        
        {b, b^2, b^5, ba, ba(b^2), ba(b^2)a}
        
        {b, b^2, ba, ba(b^2), ba(b^2)a, ba(b^2)a(b^2)}
      - {b, b^2, ba, ba(b^2), ba(b^3)} (3 descendants)
        
        {b, b^2, ba, ba(b^2), ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^5, ba, ba(b^2), ba(b^3)}
        
        {b, b^2, ba, ba(b^2), ba(b^3), ba(b^2)a(b^2)}
      - {b, b^2, ba, ba(b^2), b^2a(b^2)} (3 descendants)
        
        {b, b^2, b^5, ba, ba(b^2), b^2a(b^2)}
        
        {b, b^2, ba, ba(b^2), b^2a(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, ba, ba(b^2), b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, b^5, ba, ba(b^2)} (1 descendant)
        
        {b, b^2, b^5, ba, ba(b^2), ba(b^2)a(b^2)}
      - {b, b^2, ba, ba(b^2), ba(b^2)a(b^2)} (0 descendants)
    - {b, b^2, ba, b^2ab} (6 descendants)
      - {b, b^2, b^4, ba, b^2ab} (8 descendants)
        
        {b, b^2, b^4, ba, b(a^2)(b^2), b^2ab}
        
        {b, b^2, b^4, ba, ba(b^3), b^2ab}
        
        {b, b^2, b^4, ba, b^2ab, b^2aba}
        
        {b, b^2, b^4, ba, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^4, ba, b^4a, b^2ab}
        
        {b, b^2, b^4, b^5, ba, b^2ab}
        
        {b, b^2, b^4, ba, b^2ab, b^2a(b^4)}
        
        {b, b^2, b^4, b^7, ba, b^2ab}
      - {b, b^2, ba, b(a^2)(b^2), b^2ab} (4 descendants)
        
        {b, b^2, ba, ba(b^3), b(a^2)(b^2), b^2ab}
        
        {b, b^2, ba, b(a^2)(b^2), b^2ab, b^2aba}
        
        {b, b^2, ba, b(a^2)(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, ba, b(a^2)(b^2), b^2ab}
      - {b, b^2, ba, ba(b^3), b^2ab} (3 descendants)
        
        {b, b^2, ba, ba(b^3), b^2ab, b^2aba}
        
        {b, b^2, ba, ba(b^3), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, ba, ba(b^3), b^2ab}
      - {b, b^2, ba, b^2ab, b^2aba} (2 descendants)
        
        {b, b^2, ba, b^2ab, b^2a(b^2), b^2aba}
        
        {b, b^2, b^5, ba, b^2ab, b^2aba}
      - {b, b^2, ba, b^2ab, b^2a(b^2)} (3 descendants)
        
        {b, b^2, b^5, ba, b^2ab, b^2a(b^2)}
        
        {b, b^2, ba, b^2ab, b^2a(b^2), b^2a(b^2)ab}
        
        {b, b^2, ba, b^2ab, b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, b^5, ba, b^2ab} (0 descendants)
    - {b, b^2, b^4, ba} (6 descendants)
      - {b, b^2, b^4, ba, b(a^2)(b^2)} (5 descendants)
        
        {b, b^2, b^4, ba, ba(b^3), b(a^2)(b^2)}
        
        {b, b^2, b^4, ba, b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, ba, b^4a, b(a^2)(b^2)}
        
        {b, b^2, b^4, b^5, ba, b(a^2)(b^2)}
        
        {b, b^2, b^4, b^7, ba, b(a^2)(b^2)}
      - {b, b^2, b^4, ba, ba(b^3)} (4 descendants)
        
        {b, b^2, b^4, ba, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^4, ba, b^4a, ba(b^3)}
        
        {b, b^2, b^4, b^5, ba, ba(b^3)}
        
        {b, b^2, b^4, b^7, ba, ba(b^3)}
      - {b, b^2, b^4, ba, b^2a(b^2)} (3 descendants)
        
        {b, b^2, b^4, ba, b^4a, b^2a(b^2)}
        
        {b, b^2, b^4, b^5, ba, b^2a(b^2)}
        
        {b, b^2, b^4, b^7, ba, b^2a(b^2)}
      - {b, b^2, b^4, ba, b^4a} (2 descendants)
        
        {b, b^2, b^4, b^5, ba, b^4a}
        
        {b, b^2, b^4, b^7, ba, b^4a}
      - {b, b^2, b^4, b^5, ba} (2 descendants)
        
        {b, b^2, b^4, b^5, b^7, ba}
        
        {b, b^2, b^4, b^5, b^8, ba}
      - {b, b^2, b^4, b^7, ba} (0 descendants)
    - {b, b^2, ba, b(a^2)(b^2)} (3 descendants)
      - {b, b^2, ba, ba(b^3), b(a^2)(b^2)} (2 descendants)
        
        {b, b^2, ba, ba(b^3), b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, ba, ba(b^3), b(a^2)(b^2)}
      - {b, b^2, ba, b(a^2)(b^2), b^2a(b^2)} (1 descendant)
        
        {b, b^2, b^5, ba, b(a^2)(b^2), b^2a(b^2)}
      - {b, b^2, b^5, ba, b(a^2)(b^2)} (0 descendants)
    - {b, b^2, ba, ba(b^3)} (2 descendants)
      - {b, b^2, ba, ba(b^3), b^2a(b^2)} (1 descendant)
        
        {b, b^2, b^5, ba, ba(b^3), b^2a(b^2)}
      - {b, b^2, b^5, ba, ba(b^3)} (0 descendants)
    - {b, b^2, ba, b^2a(b^2)} (1 descendant)
      - {b, b^2, b^5, ba, b^2a(b^2)} (0 descendants)
    - {b, b^2, b^5, ba} (0 descendants)
  - {b, ba, b(a^2)} (7 descendants)
    - {b, ba, b(a^2), bab} (9 descendants)
      - {b, b^3, ba, b(a^2), bab} (11 descendants)
        
        {b, b^3, ba, b(a^2), b(a^3), bab}
        
        {b, b^3, ba, b(a^2), bab, b(a^2)b}
        
        {b, b^3, ba, b(a^2), bab, baba}
        
        {b, b^3, ba, b(a^2), bab, ba(b^2)}
        
        {b, b^3, ba, b(a^2), b^3a, bab}
        
        {b, b^3, ba, b(a^2), bab, b(a^3)b}
        
        {b, b^3, ba, b(a^2), bab, b(a^2)(b^2)}
        
        {b, b^3, ba, b(a^2), bab, babab}
        
        {b, b^3, ba, b(a^2), bab, ba(b^3)}
        
        {b, b^3, ba, b(a^2), bab, b^3ab}
        
        {b, b^3, b^5, ba, b(a^2), bab}
      - {b, ba, b(a^2), b(a^3), bab} (10 descendants)
        
        {b, ba, b(a^2), b(a^3), bab, b(a^2)b}
        
        {b, ba, b(a^2), b(a^3), bab, baba}
        
        {b, ba, b(a^2), b(a^3), bab, ba(b^2)}
        
        {b, ba, b(a^2), b(a^3), b(a^4), bab}
        
        {b, ba, b(a^2), b(a^3), bab, b(a^3)b}
        
        {b, ba, b(a^2), b(a^3), bab, b(a^2)(b^2)}
        
        {b, ba, b(a^2), b(a^3), bab, babab}
        
        {b, ba, b(a^2), b(a^3), bab, ba(b^3)}
        
        {b, ba, b(a^2), b(a^3), bab, b(a^4)b}
        
        {b, ba, b(a^2), b(a^3), bab, b(a^3)(b^2)}
      - {b, ba, b(a^2), bab, b(a^2)b} (9 descendants)
        
        {b, ba, b(a^2), bab, b(a^2)b, baba}
        
        {b, ba, b(a^2), bab, ba(b^2), b(a^2)b}
        
        {b, ba, b(a^2), bab, b(a^2)b, b(a^3)b}
        
        {b, ba, b(a^2), bab, b(a^2)b, b(a^2)ba}
        
        {b, ba, b(a^2), bab, b(a^2)b, b(a^2)(b^2)}
        
        {b, ba, b(a^2), bab, b(a^2)b, babab}
        
        {b, ba, b(a^2), bab, ba(b^3), b(a^2)b}
        
        {b, ba, b(a^2), bab, b(a^2)b, b(a^2)bab}
        
        {b, ba, b(a^2), bab, b(a^2)b, b(a^2)(b^3)}
      - {b, ba, b(a^2), bab, baba} (8 descendants)
        
        {b, ba, b(a^2), bab, ba(b^2), baba}
        
        {b, ba, b(a^2), bab, b(a^3)b, baba}
        
        {b, ba, b(a^2), bab, b(a^2)(b^2), baba}
        
        {b, ba, b(a^2), bab, baba, bab(a^2)}
        
        {b, ba, b(a^2), bab, baba, babab}
        
        {b, ba, b(a^2), bab, ba(b^3), baba}
        
        {b, ba, b(a^2), bab, baba, bab(a^2)b}
        
        {b, ba, b(a^2), bab, baba, baba(b^2)}
      - {b, ba, b(a^2), bab, ba(b^2)} (7 descendants)
        
        {b, ba, b(a^2), bab, ba(b^2), b(a^3)b}
        
        {b, ba, b(a^2), bab, ba(b^2), b(a^2)(b^2)}
        
        {b, ba, b(a^2), bab, ba(b^2), babab}
        
        {b, ba, b(a^2), bab, ba(b^2), ba(b^2)a}
        
        {b, ba, b(a^2), bab, ba(b^2), ba(b^3)}
        
        {b, ba, b(a^2), bab, ba(b^2), ba(b^2)ab}
        
        {b, ba, b(a^2), bab, ba(b^2), ba(b^4)}
      - {b, ba, b(a^2), bab, b(a^3)b} (5 descendants)
        
        {b, ba, b(a^2), bab, b(a^2)(b^2), b(a^3)b}
        
        {b, ba, b(a^2), bab, b(a^3)b, babab}
        
        {b, ba, b(a^2), bab, ba(b^3), b(a^3)b}
        
        {b, ba, b(a^2), bab, b(a^3)b, b(a^3)ba}
        
        {b, ba, b(a^2), bab, b(a^3)b, b(a^3)bab}
      - {b, ba, b(a^2), bab, b(a^2)(b^2)} (4 descendants)
        
        {b, ba, b(a^2), bab, b(a^2)(b^2), babab}
        
        {b, ba, b(a^2), bab, ba(b^3), b(a^2)(b^2)}
        
        {b, ba, b(a^2), bab, b(a^2)(b^2), b(a^2)(b^2)a}
        
        {b, ba, b(a^2), bab, b(a^2)(b^2), b(a^2)(b^2)ab}
      - {b, ba, b(a^2), bab, babab} (3 descendants)
        
        {b, ba, b(a^2), bab, ba(b^3), babab}
        
        {b, ba, b(a^2), bab, babab, bababa}
        
        {b, ba, b(a^2), bab, babab, bababab}
      - {b, ba, b(a^2), bab, ba(b^3)} (2 descendants)
        
        {b, ba, b(a^2), bab, ba(b^3), ba(b^3)a}
        
        {b, ba, b(a^2), bab, ba(b^3), ba(b^3)ab}
    - {b, b^3, ba, b(a^2)} (7 descendants)
      - {b, b^3, ba, b(a^2), b(a^3)} (9 descendants)
        
        {b, b^3, ba, b(a^2), b(a^3), b(a^2)b}
        
        {b, b^3, ba, b(a^2), b(a^3), ba(b^2)}
        
        {b, b^3, ba, b(a^2), b(a^3), b^3a}
        
        {b, b^3, ba, b(a^2), b(a^3), b(a^4)}
        
        {b, b^3, ba, b(a^2), b(a^3), b(a^3)b}
        
        {b, b^3, ba, b(a^2), b(a^3), b(a^2)(b^2)}
        
        {b, b^3, b^5, ba, b(a^2), b(a^3)}
        
        {b, b^3, ba, b(a^2), b(a^3), b(a^4)b}
        
        {b, b^3, ba, b(a^2), b(a^3), b(a^3)(b^2)}
      - {b, b^3, ba, b(a^2), b(a^2)b} (8 descendants)
        
        {b, b^3, ba, b(a^2), ba(b^2), b(a^2)b}
        
        {b, b^3, ba, b(a^2), b^3a, b(a^2)b}
        
        {b, b^3, ba, b(a^2), b(a^2)b, b(a^3)b}
        
        {b, b^3, ba, b(a^2), b(a^2)b, b(a^2)ba}
        
        {b, b^3, ba, b(a^2), b(a^2)b, b(a^2)(b^2)}
        
        {b, b^3, b^5, ba, b(a^2), b(a^2)b}
        
        {b, b^3, ba, b(a^2), b(a^2)b, b(a^2)bab}
        
        {b, b^3, ba, b(a^2), b(a^2)b, b(a^2)(b^3)}
      - {b, b^3, ba, b(a^2), ba(b^2)} (6 descendants)
        
        {b, b^3, ba, b(a^2), b^3a, ba(b^2)}
        
        {b, b^3, ba, b(a^2), ba(b^2), b(a^3)b}
        
        {b, b^3, ba, b(a^2), ba(b^2), b(a^2)(b^2)}
        
        {b, b^3, ba, b(a^2), ba(b^2), ba(b^2)a}
        
        {b, b^3, b^5, ba, b(a^2), ba(b^2)}
        
        {b, b^3, ba, b(a^2), ba(b^2), ba(b^4)}
      - {b, b^3, ba, b(a^2), b^3a} (4 descendants)
        
        {b, b^3, ba, b(a^2), b^3a, b(a^3)b}
        
        {b, b^3, ba, b(a^2), b^3a, b(a^2)(b^2)}
        
        {b, b^3, ba, b(a^2), b^3a, b^3(a^2)}
        
        {b, b^3, b^5, ba, b(a^2), b^3a}
      - {b, b^3, ba, b(a^2), b(a^3)b} (4 descendants)
        
        {b, b^3, ba, b(a^2), b(a^2)(b^2), b(a^3)b}
        
        {b, b^3, b^5, ba, b(a^2), b(a^3)b}
        
        {b, b^3, ba, b(a^2), b(a^3)b, b(a^3)ba}
        
        {b, b^3, ba, b(a^2), b(a^3)b, b(a^3)(b^3)}
      - {b, b^3, ba, b(a^2), b(a^2)(b^2)} (3 descendants)
        
        {b, b^3, b^5, ba, b(a^2), b(a^2)(b^2)}
        
        {b, b^3, ba, b(a^2), b(a^2)(b^2), b(a^2)(b^2)a}
        
        {b, b^3, ba, b(a^2), b(a^2)(b^2), b(a^2)(b^4)}
      - {b, b^3, b^5, ba, b(a^2)} (1 descendant)
        
        {b, b^3, b^5, b^7, ba, b(a^2)}
    - {b, ba, b(a^2), b(a^3)} (7 descendants)
      - {b, ba, b(a^2), b(a^3), b(a^2)b} (9 descendants)
        
        {b, ba, b(a^2), b(a^3), ba(b^2), b(a^2)b}
        
        {b, ba, b(a^2), b(a^3), b(a^4), b(a^2)b}
        
        {b, ba, b(a^2), b(a^3), b(a^2)b, b(a^3)b}
        
        {b, ba, b(a^2), b(a^3), b(a^2)b, b(a^2)ba}
        
        {b, ba, b(a^2), b(a^3), b(a^2)b, b(a^2)(b^2)}
        
        {b, ba, b(a^2), b(a^3), b(a^2)b, b(a^4)b}
        
        {b, ba, b(a^2), b(a^3), b(a^2)b, b(a^3)(b^2)}
        
        {b, ba, b(a^2), b(a^3), b(a^2)b, b(a^2)bab}
        
        {b, ba, b(a^2), b(a^3), b(a^2)b, b(a^2)(b^3)}
      - {b, ba, b(a^2), b(a^3), ba(b^2)} (6 descendants)
        
        {b, ba, b(a^2), b(a^3), b(a^4), ba(b^2)}
        
        {b, ba, b(a^2), b(a^3), ba(b^2), b(a^3)b}
        
        {b, ba, b(a^2), b(a^3), ba(b^2), b(a^2)(b^2)}
        
        {b, ba, b(a^2), b(a^3), ba(b^2), ba(b^2)a}
        
        {b, ba, b(a^2), b(a^3), ba(b^2), b(a^4)b}
        
        {b, ba, b(a^2), b(a^3), ba(b^2), b(a^3)(b^2)}
      - {b, ba, b(a^2), b(a^3), b(a^4)} (7 descendants)
        
        {b, ba, b(a^2), b(a^3), b(a^4), b(a^3)b}
        
        {b, ba, b(a^2), b(a^3), b(a^4), b(a^2)(b^2)}
        
        {b, ba, b(a^2), b(a^3), b(a^4), b(a^5)}
        
        {b, ba, b(a^2), b(a^3), b(a^4), b(a^4)b}
        
        {b, ba, b(a^2), b(a^3), b(a^4), b(a^3)(b^2)}
        
        {b, ba, b(a^2), b(a^3), b(a^4), b(a^5)b}
        
        {b, ba, b(a^2), b(a^3), b(a^4), b(a^4)(b^2)}
      - {b, ba, b(a^2), b(a^3), b(a^3)b} (6 descendants)
        
        {b, ba, b(a^2), b(a^3), b(a^2)(b^2), b(a^3)b}
        
        {b, ba, b(a^2), b(a^3), b(a^3)b, b(a^4)b}
        
        {b, ba, b(a^2), b(a^3), b(a^3)b, b(a^3)ba}
        
        {b, ba, b(a^2), b(a^3), b(a^3)b, b(a^3)(b^2)}
        
        {b, ba, b(a^2), b(a^3), b(a^3)b, b(a^3)bab}
        
        {b, ba, b(a^2), b(a^3), b(a^3)b, b(a^3)(b^3)}
      - {b, ba, b(a^2), b(a^3), b(a^2)(b^2)} (3 descendants)
        
        {b, ba, b(a^2), b(a^3), b(a^2)(b^2), b(a^4)b}
        
        {b, ba, b(a^2), b(a^3), b(a^2)(b^2), b(a^3)(b^2)}
        
        {b, ba, b(a^2), b(a^3), b(a^2)(b^2), b(a^2)(b^2)a}
      - {b, ba, b(a^2), b(a^3), b(a^4)b} (2 descendants)
        
        {b, ba, b(a^2), b(a^3), b(a^3)(b^2), b(a^4)b}
        
        {b, ba, b(a^2), b(a^3), b(a^4)b, b(a^4)ba}
      - {b, ba, b(a^2), b(a^3), b(a^3)(b^2)} (1 descendant)
        
        {b, ba, b(a^2), b(a^3), b(a^3)(b^2), b(a^3)(b^2)a}
    - {b, ba, b(a^2), b(a^2)b} (6 descendants)
      - {b, ba, b(a^2), ba(b^2), b(a^2)b} (6 descendants)
        
        {b, ba, b(a^2), ba(b^2), b(a^2)b, b(a^3)b}
        
        {b, ba, b(a^2), ba(b^2), b(a^2)b, b(a^2)ba}
        
        {b, ba, b(a^2), ba(b^2), b(a^2)b, b(a^2)(b^2)}
        
        {b, ba, b(a^2), ba(b^2), b(a^2)b, ba(b^2)a}
        
        {b, ba, b(a^2), ba(b^2), b(a^2)b, b(a^2)bab}
        
        {b, ba, b(a^2), ba(b^2), b(a^2)b, b(a^2)(b^3)}
      - {b, ba, b(a^2), b(a^2)b, b(a^3)b} (5 descendants)
        
        {b, ba, b(a^2), b(a^2)b, b(a^3)b, b(a^2)ba}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)(b^2), b(a^3)b}
        
        {b, ba, b(a^2), b(a^2)b, b(a^3)b, b(a^3)ba}
        
        {b, ba, b(a^2), b(a^2)b, b(a^3)b, b(a^2)bab}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)(b^3), b(a^3)b}
      - {b, ba, b(a^2), b(a^2)b, b(a^2)ba} (6 descendants)
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)(b^2), b(a^2)ba}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)ba, b(a^2)b(a^2)}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)ba, b(a^2)bab}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)(b^3), b(a^2)ba}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)ba, b(a^2)b(a^2)b}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)ba, b(a^2)ba(b^2)}
      - {b, ba, b(a^2), b(a^2)b, b(a^2)(b^2)} (5 descendants)
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)(b^2), b(a^2)bab}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)(b^2), b(a^2)(b^2)a}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)(b^2), b(a^2)(b^3)}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)(b^2), b(a^2)(b^2)ab}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)(b^2), b(a^2)(b^4)}
      - {b, ba, b(a^2), b(a^2)b, b(a^2)bab} (2 descendants)
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)(b^3), b(a^2)bab}
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)bab, b(a^2)baba}
      - {b, ba, b(a^2), b(a^2)b, b(a^2)(b^3)} (1 descendant)
        
        {b, ba, b(a^2), b(a^2)b, b(a^2)(b^3), b(a^2)(b^3)a}
    - {b, ba, b(a^2), ba(b^2)} (3 descendants)
      - {b, ba, b(a^2), ba(b^2), b(a^3)b} (3 descendants)
        
        {b, ba, b(a^2), ba(b^2), b(a^2)(b^2), b(a^3)b}
        
        {b, ba, b(a^2), ba(b^2), b(a^3)b, ba(b^2)a}
        
        {b, ba, b(a^2), ba(b^2), b(a^3)b, b(a^3)ba}
      - {b, ba, b(a^2), ba(b^2), b(a^2)(b^2)} (2 descendants)
        
        {b, ba, b(a^2), ba(b^2), b(a^2)(b^2), ba(b^2)a}
        
        {b, ba, b(a^2), ba(b^2), b(a^2)(b^2), b(a^2)(b^2)a}
      - {b, ba, b(a^2), ba(b^2), ba(b^2)a} (2 descendants)
        
        {b, ba, b(a^2), ba(b^2), ba(b^2)a, ba(b^2)(a^2)}
        
        {b, ba, b(a^2), ba(b^2), ba(b^2)a, ba(b^2)a(b^2)}
    - {b, ba, b(a^2), b(a^3)b} (2 descendants)
      - {b, ba, b(a^2), b(a^2)(b^2), b(a^3)b} (2 descendants)
        
        {b, ba, b(a^2), b(a^2)(b^2), b(a^3)b, b(a^3)ba}
        
        {b, ba, b(a^2), b(a^2)(b^2), b(a^3)b, b(a^2)(b^2)a}
      - {b, ba, b(a^2), b(a^3)b, b(a^3)ba} (1 descendant)
        
        {b, ba, b(a^2), b(a^3)b, b(a^3)ba, b(a^3)b(a^2)}
    - {b, ba, b(a^2), b(a^2)(b^2)} (1 descendant)
      - {b, ba, b(a^2), b(a^2)(b^2), b(a^2)(b^2)a} (1 descendant)
        
        {b, ba, b(a^2), b(a^2)(b^2), b(a^2)(b^2)a, b(a^2)(b^2)(a^2)}
  - {b, ba, bab} (6 descendants)
    - {b, b^3, ba, bab} (8 descendants)
      - {b, b^3, ba, bab, b(a^2)b} (10 descendants)
        
        {b, b^3, ba, bab, b(a^2)b, baba}
        
        {b, b^3, ba, bab, ba(b^2), b(a^2)b}
        
        {b, b^3, ba, b^3a, bab, b(a^2)b}
        
        {b, b^3, ba, bab, b(a^2)b, b(a^2)ba}
        
        {b, b^3, ba, bab, b(a^2)b, babab}
        
        {b, b^3, ba, bab, ba(b^3), b(a^2)b}
        
        {b, b^3, ba, bab, b(a^2)b, b^3ab}
        
        {b, b^3, b^5, ba, bab, b(a^2)b}
        
        {b, b^3, ba, bab, b(a^2)b, b(a^2)bab}
        
        {b, b^3, ba, bab, b(a^2)b, b(a^2)(b^3)}
      - {b, b^3, ba, bab, baba} (9 descendants)
        
        {b, b^3, ba, bab, ba(b^2), baba}
        
        {b, b^3, ba, b^3a, bab, baba}
        
        {b, b^3, ba, bab, baba, bab(a^2)}
        
        {b, b^3, ba, bab, baba, babab}
        
        {b, b^3, ba, bab, ba(b^3), baba}
        
        {b, b^3, ba, bab, b^3ab, baba}
        
        {b, b^3, b^5, ba, bab, baba}
        
        {b, b^3, ba, bab, baba, bab(a^2)b}
        
        {b, b^3, ba, bab, baba, baba(b^2)}
      - {b, b^3, ba, bab, ba(b^2)} (8 descendants)
        
        {b, b^3, ba, b^3a, bab, ba(b^2)}
        
        {b, b^3, ba, bab, ba(b^2), babab}
        
        {b, b^3, ba, bab, ba(b^2), ba(b^2)a}
        
        {b, b^3, ba, bab, ba(b^2), ba(b^3)}
        
        {b, b^3, ba, bab, ba(b^2), b^3ab}
        
        {b, b^3, b^5, ba, bab, ba(b^2)}
        
        {b, b^3, ba, bab, ba(b^2), ba(b^2)ab}
        
        {b, b^3, ba, bab, ba(b^2), ba(b^4)}
      - {b, b^3, ba, b^3a, bab} (4 descendants)
        
        {b, b^3, ba, b^3a, bab, babab}
        
        {b, b^3, ba, b^3a, bab, ba(b^3)}
        
        {b, b^3, ba, b^3a, bab, b^3ab}
        
        {b, b^3, b^5, ba, b^3a, bab}
      - {b, b^3, ba, bab, babab} (6 descendants)
        
        {b, b^3, ba, bab, ba(b^3), babab}
        
        {b, b^3, ba, bab, b^3ab, babab}
        
        {b, b^3, b^5, ba, bab, babab}
        
        {b, b^3, ba, bab, babab, bababa}
        
        {b, b^3, ba, bab, babab, bababab}
        
        {b, b^3, ba, bab, babab, baba(b^3)}
      - {b, b^3, ba, bab, ba(b^3)} (5 descendants)
        
        {b, b^3, ba, bab, ba(b^3), b^3ab}
        
        {b, b^3, b^5, ba, bab, ba(b^3)}
        
        {b, b^3, ba, bab, ba(b^3), ba(b^3)a}
        
        {b, b^3, ba, bab, ba(b^3), ba(b^3)ab}
        
        {b, b^3, ba, bab, ba(b^3), ba(b^5)}
      - {b, b^3, ba, bab, b^3ab} (1 descendant)
        
        {b, b^3, b^5, ba, bab, b^3ab}
      - {b, b^3, b^5, ba, bab} (1 descendant)
        
        {b, b^3, b^5, b^7, ba, bab}
    - {b, ba, bab, b(a^2)b} (6 descendants)
      - {b, ba, bab, b(a^2)b, baba} (8 descendants)
        
        {b, ba, bab, ba(b^2), b(a^2)b, baba}
        
        {b, ba, bab, b(a^2)b, baba, b(a^2)ba}
        
        {b, ba, bab, b(a^2)b, baba, bab(a^2)}
        
        {b, ba, bab, b(a^2)b, baba, babab}
        
        {b, ba, bab, ba(b^3), b(a^2)b, baba}
        
        {b, ba, bab, b(a^2)b, baba, b(a^2)bab}
        
        {b, ba, bab, b(a^2)b, baba, bab(a^2)b}
        
        {b, ba, bab, b(a^2)b, baba, baba(b^2)}
      - {b, ba, bab, ba(b^2), b(a^2)b} (7 descendants)
        
        {b, ba, bab, ba(b^2), b(a^2)b, b(a^2)ba}
        
        {b, ba, bab, ba(b^2), b(a^2)b, babab}
        
        {b, ba, bab, ba(b^2), b(a^2)b, ba(b^2)a}
        
        {b, ba, bab, ba(b^2), ba(b^3), b(a^2)b}
        
        {b, ba, bab, ba(b^2), b(a^2)b, b(a^2)bab}
        
        {b, ba, bab, ba(b^2), b(a^2)b, ba(b^2)ab}
        
        {b, ba, bab, ba(b^2), ba(b^4), b(a^2)b}
      - {b, ba, bab, b(a^2)b, b(a^2)ba} (4 descendants)
        
        {b, ba, bab, b(a^2)b, b(a^2)ba, babab}
        
        {b, ba, bab, ba(b^3), b(a^2)b, b(a^2)ba}
        
        {b, ba, bab, b(a^2)b, b(a^2)ba, b(a^2)bab}
        
        {b, ba, bab, b(a^2)b, b(a^2)ba, b(a^2)b(a^2)b}
      - {b, ba, bab, b(a^2)b, babab} (4 descendants)
        
        {b, ba, bab, ba(b^3), b(a^2)b, babab}
        
        {b, ba, bab, b(a^2)b, babab, b(a^2)bab}
        
        {b, ba, bab, b(a^2)b, babab, bababa}
        
        {b, ba, bab, b(a^2)b, babab, bababab}
      - {b, ba, bab, ba(b^3), b(a^2)b} (3 descendants)
        
        {b, ba, bab, ba(b^3), b(a^2)b, b(a^2)bab}
        
        {b, ba, bab, ba(b^3), b(a^2)b, ba(b^3)a}
        
        {b, ba, bab, ba(b^3), b(a^2)b, ba(b^3)ab}
      - {b, ba, bab, b(a^2)b, b(a^2)bab} (0 descendants)
    - {b, ba, bab, baba} (6 descendants)
      - {b, ba, bab, ba(b^2), baba} (8 descendants)
        
        {b, ba, bab, ba(b^2), baba, bab(a^2)}
        
        {b, ba, bab, ba(b^2), baba, babab}
        
        {b, ba, bab, ba(b^2), baba, ba(b^2)a}
        
        {b, ba, bab, ba(b^2), ba(b^3), baba}
        
        {b, ba, bab, ba(b^2), baba, bab(a^2)b}
        
        {b, ba, bab, ba(b^2), baba, baba(b^2)}
        
        {b, ba, bab, ba(b^2), baba, ba(b^2)ab}
        
        {b, ba, bab, ba(b^2), ba(b^4), baba}
      - {b, ba, bab, baba, bab(a^2)} (7 descendants)
        
        {b, ba, bab, baba, bab(a^2), babab}
        
        {b, ba, bab, ba(b^3), baba, bab(a^2)}
        
        {b, ba, bab, baba, bab(a^2), bab(a^3)}
        
        {b, ba, bab, baba, bab(a^2), bab(a^2)b}
        
        {b, ba, bab, baba, bab(a^2), baba(b^2)}
        
        {b, ba, bab, baba, bab(a^2), bab(a^3)b}
        
        {b, ba, bab, baba, bab(a^2), bab(a^2)(b^2)}
      - {b, ba, bab, baba, babab} (6 descendants)
        
        {b, ba, bab, ba(b^3), baba, babab}
        
        {b, ba, bab, baba, babab, bab(a^2)b}
        
        {b, ba, bab, baba, babab, bababa}
        
        {b, ba, bab, baba, babab, baba(b^2)}
        
        {b, ba, bab, baba, babab, bababab}
        
        {b, ba, bab, baba, babab, baba(b^3)}
      - {b, ba, bab, ba(b^3), baba} (4 descendants)
        
        {b, ba, bab, ba(b^3), baba, bab(a^2)b}
        
        {b, ba, bab, ba(b^3), baba, baba(b^2)}
        
        {b, ba, bab, ba(b^3), baba, ba(b^3)a}
        
        {b, ba, bab, ba(b^3), baba, ba(b^3)ab}
      - {b, ba, bab, baba, bab(a^2)b} (3 descendants)
        
        {b, ba, bab, baba, baba(b^2), bab(a^2)b}
        
        {b, ba, bab, baba, bab(a^2)b, bab(a^2)ba}
        
        {b, ba, bab, baba, bab(a^2)b, bab(a^2)bab}
      - {b, ba, bab, baba, baba(b^2)} (2 descendants)
        
        {b, ba, bab, baba, baba(b^2), baba(b^2)a}
        
        {b, ba, bab, baba, baba(b^2), baba(b^2)ab}
    - {b, ba, bab, ba(b^2)} (5 descendants)
      - {b, ba, bab, ba(b^2), babab} (6 descendants)
        
        {b, ba, bab, ba(b^2), ba(b^2)a, babab}
        
        {b, ba, bab, ba(b^2), ba(b^3), babab}
        
        {b, ba, bab, ba(b^2), babab, bababa}
        
        {b, ba, bab, ba(b^2), babab, ba(b^2)ab}
        
        {b, ba, bab, ba(b^2), ba(b^4), babab}
        
        {b, ba, bab, ba(b^2), babab, bababab}
      - {b, ba, bab, ba(b^2), ba(b^2)a} (6 descendants)
        
        {b, ba, bab, ba(b^2), ba(b^3), ba(b^2)a}
        
        {b, ba, bab, ba(b^2), ba(b^2)a, ba(b^2)(a^2)}
        
        {b, ba, bab, ba(b^2), ba(b^2)a, ba(b^2)ab}
        
        {b, ba, bab, ba(b^2), ba(b^4), ba(b^2)a}
        
        {b, ba, bab, ba(b^2), ba(b^2)a, ba(b^2)(a^2)b}
        
        {b, ba, bab, ba(b^2), ba(b^2)a, ba(b^2)a(b^2)}
      - {b, ba, bab, ba(b^2), ba(b^3)} (5 descendants)
        
        {b, ba, bab, ba(b^2), ba(b^3), ba(b^2)ab}
        
        {b, ba, bab, ba(b^2), ba(b^3), ba(b^3)a}
        
        {b, ba, bab, ba(b^2), ba(b^3), ba(b^4)}
        
        {b, ba, bab, ba(b^2), ba(b^3), ba(b^3)ab}
        
        {b, ba, bab, ba(b^2), ba(b^3), ba(b^5)}
      - {b, ba, bab, ba(b^2), ba(b^2)ab} (3 descendants)
        
        {b, ba, bab, ba(b^2), ba(b^4), ba(b^2)ab}
        
        {b, ba, bab, ba(b^2), ba(b^2)ab, ba(b^2)aba}
        
        {b, ba, bab, ba(b^2), ba(b^2)ab, ba(b^2)abab}
      - {b, ba, bab, ba(b^2), ba(b^4)} (2 descendants)
        
        {b, ba, bab, ba(b^2), ba(b^4), ba(b^4)a}
        
        {b, ba, bab, ba(b^2), ba(b^4), ba(b^4)ab}
    - {b, ba, bab, babab} (3 descendants)
      - {b, ba, bab, ba(b^3), babab} (4 descendants)
        
        {b, ba, bab, ba(b^3), babab, bababa}
        
        {b, ba, bab, ba(b^3), ba(b^3)a, babab}
        
        {b, ba, bab, ba(b^3), babab, bababab}
        
        {b, ba, bab, ba(b^3), babab, ba(b^3)ab}
      - {b, ba, bab, babab, bababa} (1 descendant)
        
        {b, ba, bab, babab, bababa, bababab}
      - {b, ba, bab, babab, bababab} (1 descendant)
        
        {b, ba, bab, babab, bababab, babababab}
    - {b, ba, bab, ba(b^3)} (2 descendants)
      - {b, ba, bab, ba(b^3), ba(b^3)a} (1 descendant)
        
        {b, ba, bab, ba(b^3), ba(b^3)a, ba(b^3)ab}
      - {b, ba, bab, ba(b^3), ba(b^3)ab} (0 descendants)
  - {b, b^3, ba} (4 descendants)
    - {b, b^3, ba, b(a^2)b} (5 descendants)
      - {b, b^3, ba, ba(b^2), b(a^2)b} (6 descendants)
        
        {b, b^3, ba, b^3a, ba(b^2), b(a^2)b}
        
        {b, b^3, ba, ba(b^2), b(a^2)b, b(a^2)ba}
        
        {b, b^3, ba, ba(b^2), b(a^2)b, ba(b^2)a}
        
        {b, b^3, b^5, ba, ba(b^2), b(a^2)b}
        
        {b, b^3, ba, ba(b^2), b(a^2)b, b(a^2)(b^3)}
        
        {b, b^3, ba, ba(b^2), ba(b^4), b(a^2)b}
      - {b, b^3, ba, b^3a, b(a^2)b} (4 descendants)
        
        {b, b^3, ba, b^3a, b(a^2)b, b(a^2)ba}
        
        {b, b^3, b^5, ba, b^3a, b(a^2)b}
        
        {b, b^3, ba, b^3a, b(a^2)b, b(a^2)(b^3)}
        
        {b, b^3, ba, b^3a, b(a^2)b, b^3(a^2)b}
      - {b, b^3, ba, b(a^2)b, b(a^2)ba} (3 descendants)
        
        {b, b^3, b^5, ba, b(a^2)b, b(a^2)ba}
        
        {b, b^3, ba, b(a^2)b, b(a^2)(b^3), b(a^2)ba}
        
        {b, b^3, ba, b(a^2)b, b(a^2)ba, b(a^2)b(a^2)b}
      - {b, b^3, b^5, ba, b(a^2)b} (2 descendants)
        
        {b, b^3, b^5, ba, b(a^2)b, b(a^2)(b^3)}
        
        {b, b^3, b^5, b^7, ba, b(a^2)b}
      - {b, b^3, ba, b(a^2)b, b(a^2)(b^3)} (0 descendants)
    - {b, b^3, ba, ba(b^2)} (4 descendants)
      - {b, b^3, ba, b^3a, ba(b^2)} (4 descendants)
        
        {b, b^3, ba, b^3a, ba(b^2), ba(b^2)a}
        
        {b, b^3, b^5, ba, b^3a, ba(b^2)}
        
        {b, b^3, ba, b^3a, ba(b^2), ba(b^4)}
        
        {b, b^3, ba, b^3a, ba(b^2), b^3a(b^2)}
      - {b, b^3, ba, ba(b^2), ba(b^2)a} (3 descendants)
        
        {b, b^3, b^5, ba, ba(b^2), ba(b^2)a}
        
        {b, b^3, ba, ba(b^2), ba(b^4), ba(b^2)a}
        
        {b, b^3, ba, ba(b^2), ba(b^2)a, ba(b^2)a(b^2)}
      - {b, b^3, b^5, ba, ba(b^2)} (2 descendants)
        
        {b, b^3, b^5, ba, ba(b^2), ba(b^4)}
        
        {b, b^3, b^5, b^7, ba, ba(b^2)}
      - {b, b^3, ba, ba(b^2), ba(b^4)} (0 descendants)
    - {b, b^3, ba, b^3a} (1 descendant)
      - {b, b^3, b^5, ba, b^3a} (2 descendants)
        
        {b, b^3, b^5, ba, b^3a, b^5a}
        
        {b, b^3, b^5, b^7, ba, b^3a}
    - {b, b^3, b^5, ba} (1 descendant)
      - {b, b^3, b^5, b^7, ba} (1 descendant)
        
        {b, b^3, b^5, b^7, b^9, ba}
  - {b, ba, b(a^2)b} (2 descendants)
    - {b, ba, ba(b^2), b(a^2)b} (2 descendants)
      - {b, ba, ba(b^2), b(a^2)b, b(a^2)ba} (3 descendants)
        
        {b, ba, ba(b^2), b(a^2)b, ba(b^2)a, b(a^2)ba}
        
        {b, ba, ba(b^2), b(a^2)b, b(a^2)ba, b(a^2)b(a^2)b}
        
        {b, ba, ba(b^2), b(a^2)b, b(a^2)ba, b(a^2)ba(b^2)}
      - {b, ba, ba(b^2), b(a^2)b, ba(b^2)a} (2 descendants)
        
        {b, ba, ba(b^2), b(a^2)b, ba(b^2)a, ba(b^2)(a^2)b}
        
        {b, ba, ba(b^2), b(a^2)b, ba(b^2)a, ba(b^2)a(b^2)}
    - {b, ba, b(a^2)b, b(a^2)ba} (1 descendant)
      - {b, ba, b(a^2)b, b(a^2)ba, b(a^2)b(a^2)b} (1 descendant)
        
        {b, ba, b(a^2)b, b(a^2)ba, b(a^2)b(a^2)b, b(a^2)b(a^2)ba}
  - {b, ba, ba(b^2)} (1 descendant)
    - {b, ba, ba(b^2), ba(b^2)a} (1 descendant)
      - {b, ba, ba(b^2), ba(b^2)a, ba(b^2)a(b^2)} (1 descendant)
        
        {b, ba, ba(b^2), ba(b^2)a, ba(b^2)a(b^2), ba(b^2)a(b^2)a}
- {b, b^2} (9 descendants)
  - {b, b^2, a(b^2)} (12 descendants)
    - {b, b^2, a(b^2), bab} (12 descendants)
      - {b, b^2, a(b^2), b^2a, bab} (16 descendants)
        
        {b, b^2, b^3, a(b^2), b^2a, bab}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, bab}
        
        {b, b^2, a(b^2), b^2a, bab, ba(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), bab}
        
        {b, b^2, a(b^2), b^2a, bab, b^2ab}
        
        {b, b^2, b^4, a(b^2), b^2a, bab}
        
        {b, b^2, a(b^2), b^2a, bab, b(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, bab, babab}
        
        {b, b^2, a(b^2), b^2a, bab, b^2(a^2)b}
        
        {b, b^2, a(b^2), b^2a, bab, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), b^2a, bab}
        
        {b, b^2, a(b^2), b^2a, bab, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, bab, b^2a(b^3)}
        
        {b, b^2, a(b^2), b^2a, bab, b^3a(b^2)}
        
        {b, b^2, a(b^2), b^2a, bab, b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), b^2a, bab, b^2aba(b^2)}
      - {b, b^2, b^3, a(b^2), bab} (20 descendants)
        
        {b, b^2, b^3, a(b^2), a^2(b^2), bab}
        
        {b, b^2, b^3, a(b^2), a(b^3), bab}
        
        {b, b^2, b^3, a(b^2), bab, ba(b^2)}
        
        {b, b^2, b^3, a(b^2), bab, b^2ab}
        
        {b, b^2, b^3, a(b^2), b^3a, bab}
        
        {b, b^2, b^3, b^4, a(b^2), bab}
        
        {b, b^2, b^3, a(b^2), bab, b(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), bab, babab}
        
        {b, b^2, b^3, a(b^2), bab, ba(b^3)}
        
        {b, b^2, b^3, a(b^2), bab, b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), bab, b^3ab}
        
        {b, b^2, b^3, b^5, a(b^2), bab}
        
        {b, b^2, b^3, a(b^2), bab, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), bab, b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), bab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), bab}
        
        {b, b^2, b^3, a(b^2), bab, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), bab, b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), bab, b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), bab}
      - {b, b^2, a(b^2), a^2(b^2), bab} (13 descendants)
        
        {b, b^2, a(b^2), a^2(b^2), bab, ba(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), bab, b^2ab}
        
        {b, b^2, b^4, a(b^2), a^2(b^2), bab}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), bab}
        
        {b, b^2, a(b^2), a^2(b^2), bab, b(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), bab, babab}
        
        {b, b^2, a(b^2), a^2(b^2), bab, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), a^2(b^2), bab}
        
        {b, b^2, a(b^2), a^2(b^2), bab, b(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), bab, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), bab, b^3a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), bab, b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), bab, b^3(a^2)(b^2)}
      - {b, b^2, a(b^2), bab, ba(b^2)} (12 descendants)
        
        {b, b^2, a(b^2), bab, ba(b^2), b^2ab}
        
        {b, b^2, b^4, a(b^2), bab, ba(b^2)}
        
        {b, b^2, a(b^2), bab, ba(b^2), aba(b^2)}
        
        {b, b^2, a(b^2), bab, ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, a(b^2), bab, ba(b^2), babab}
        
        {b, b^2, a(b^2), bab, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), bab, ba(b^2)}
        
        {b, b^2, a(b^2), bab, ba(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), bab, ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), bab, ba(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), bab, ba(b^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), bab, ba(b^2), b^4a(b^2)}
      - {b, b^2, a(b^2), bab, b^2ab} (9 descendants)
        
        {b, b^2, b^4, a(b^2), bab, b^2ab}
        
        {b, b^2, a(b^2), bab, b^2ab, a(b^2)ab}
        
        {b, b^2, a(b^2), bab, b(a^2)(b^2), b^2ab}
        
        {b, b^2, a(b^2), bab, b^2ab, babab}
        
        {b, b^2, a(b^2), bab, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), bab, b^2ab}
        
        {b, b^2, a(b^2), bab, b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), bab, b^2ab, b^2abab}
        
        {b, b^2, a(b^2), bab, b^2ab, b^3a(b^2)}
      - {b, b^2, b^4, a(b^2), bab} (9 descendants)
        
        {b, b^2, b^4, a(b^2), bab, b(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), bab, babab}
        
        {b, b^2, b^4, a(b^2), bab, b^2a(b^2)}
        
        {b, b^2, b^4, b^5, a(b^2), bab}
        
        {b, b^2, b^4, a(b^2), bab, ba(b^4)}
        
        {b, b^2, b^4, a(b^2), bab, b^2(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), bab, b^3a(b^2)}
        
        {b, b^2, b^4, a(b^2), bab, b^4ab}
        
        {b, b^2, b^4, b^7, a(b^2), bab}
      - {b, b^2, a(b^2), bab, b(a^2)(b^2)} (6 descendants)
        
        {b, b^2, a(b^2), bab, b(a^2)(b^2), babab}
        
        {b, b^2, a(b^2), bab, b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), bab, b(a^2)(b^2)}
        
        {b, b^2, a(b^2), bab, b(a^2)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), bab, b(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), bab, b(a^2)(b^2), bab(a^2)(b^2)}
      - {b, b^2, a(b^2), bab, babab} (5 descendants)
        
        {b, b^2, a(b^2), bab, b^2a(b^2), babab}
        
        {b, b^2, b^5, a(b^2), bab, babab}
        
        {b, b^2, a(b^2), bab, b^2(a^2)(b^2), babab}
        
        {b, b^2, a(b^2), bab, b^3a(b^2), babab}
        
        {b, b^2, a(b^2), bab, babab, bababab}
      - {b, b^2, a(b^2), bab, b^2a(b^2)} (4 descendants)
        
        {b, b^2, b^5, a(b^2), bab, b^2a(b^2)}
        
        {b, b^2, a(b^2), bab, b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), bab, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), bab, b^2a(b^2), ba(b^2)a(b^2)}
      - {b, b^2, b^5, a(b^2), bab} (2 descendants)
        
        {b, b^2, b^5, a(b^2), bab, b^2(a^2)(b^2)}
        
        {b, b^2, b^5, a(b^2), bab, b^3a(b^2)}
      - {b, b^2, a(b^2), bab, b^2(a^2)(b^2)} (1 descendant)
        
        {b, b^2, a(b^2), bab, b^2(a^2)(b^2), b^3a(b^2)}
      - {b, b^2, a(b^2), bab, b^3a(b^2)} (0 descendants)
    - {b, b^2, a(b^2), b^2a} (15 descendants)
      - {b, b^2, b^3, a(b^2), b^2a} (25 descendants)
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^2a}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^2a}
        
        {b, b^2, b^3, a(b^2), b^2a, ba(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^2(a^2)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^2ab}
        
        {b, b^2, b^3, a(b^2), b^2a, b^3a}
        
        {b, b^2, b^3, b^4, a(b^2), b^2a}
        
        {b, b^2, b^3, a(b^2), b^2a, b(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a, ba(b^3)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^2(a^2)b}
        
        {b, b^2, b^3, a(b^2), b^2a, b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^3ab}
        
        {b, b^2, b^3, b^5, a(b^2), b^2a}
        
        {b, b^2, b^3, a(b^2), b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), b^2a}
        
        {b, b^2, b^3, a(b^2), b^2a, b^2(a^3)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^2aba(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^2a(b^4)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^2a, b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), b^2a}
      - {b, b^2, a(b^2), a^2(b^2), b^2a} (18 descendants)
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, ba(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^2(a^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^2ab}
        
        {b, b^2, b^4, a(b^2), a^2(b^2), b^2a}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b^2a}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^2(a^2)b}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), a^2(b^2), b^2a}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^2a(b^3)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^3a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^2aba(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^3(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^2(a^4)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a, b^2ab(a^2)(b^2)}
      - {b, b^2, a(b^2), b^2a, ba(b^2)} (17 descendants)
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), ba(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b^2ab}
        
        {b, b^2, b^4, a(b^2), b^2a, ba(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), aba(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b^2(a^2)b}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), b^2a, ba(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b^2a(b^3)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b^4a(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b^2(a^2)ba(b^2)}
        
        {b, b^2, a(b^2), b^2a, ba(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, a(b^2), b^2a, b^2(a^2)} (16 descendants)
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2ab}
        
        {b, b^2, b^4, a(b^2), b^2a, b^2(a^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2(a^3)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2(a^2)b}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), b^2a, b^2(a^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2(a^3)b}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2a(b^3)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2(a^2)(b^3)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2(a^4)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2), b^2(a^2)ba(b^2)}
      - {b, b^2, a(b^2), b^2a, b^2ab} (15 descendants)
        
        {b, b^2, b^4, a(b^2), b^2a, b^2ab}
        
        {b, b^2, a(b^2), b^2a, b(a^2)(b^2), b^2ab}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^2(a^2)b}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^2aba}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), b^2a, b^2ab}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^2abab}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^2a(b^3)}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^3a(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^2aba(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^2a(b^4)}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^2ab(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2ab, b^2a(b^2)a(b^2)}
      - {b, b^2, b^4, a(b^2), b^2a} (10 descendants)
        
        {b, b^2, b^4, a(b^2), b^2a, b(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), b^2a, b^2(a^2)b}
        
        {b, b^2, b^4, a(b^2), b^2a, b^2a(b^2)}
        
        {b, b^2, b^4, b^5, a(b^2), b^2a}
        
        {b, b^2, b^4, a(b^2), b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), b^2a, b^2a(b^3)}
        
        {b, b^2, b^4, a(b^2), b^2a, b^3a(b^2)}
        
        {b, b^2, b^4, a(b^2), b^2a, b^2(a^3)(b^2)}
        
        {b, b^2, b^4, a(b^2), b^2a, b^2aba(b^2)}
        
        {b, b^2, b^4, b^7, a(b^2), b^2a}
      - {b, b^2, a(b^2), b^2a, b(a^2)(b^2)} (8 descendants)
        
        {b, b^2, a(b^2), b^2a, b(a^2)(b^2), b^2(a^2)b}
        
        {b, b^2, a(b^2), b^2a, b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), b^2a, b(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b(a^2)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b(a^2)(b^2), b^2a(b^3)}
        
        {b, b^2, a(b^2), b^2a, b(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), b^2a, b(a^2)(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b(a^2)(b^2), b^2aba(b^2)}
      - {b, b^2, a(b^2), b^2a, b^2(a^2)b} (7 descendants)
        
        {b, b^2, a(b^2), b^2a, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, b^5, a(b^2), b^2a, b^2(a^2)b}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2a(b^3), b^2(a^2)b}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2)b, b^3a(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2)b, b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2)b, b^2aba(b^2)}
      - {b, b^2, a(b^2), b^2a, b^2a(b^2)} (7 descendants)
        
        {b, b^2, b^5, a(b^2), b^2a, b^2a(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, a(b^2), b^2a, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2a(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2a(b^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2a(b^2), b^2a(b^3)a(b^2)}
      - {b, b^2, b^5, a(b^2), b^2a} (5 descendants)
        
        {b, b^2, b^5, a(b^2), b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^5, a(b^2), b^2a, b^2a(b^3)}
        
        {b, b^2, b^5, a(b^2), b^2a, b^3a(b^2)}
        
        {b, b^2, b^5, a(b^2), b^2a, b^2(a^3)(b^2)}
        
        {b, b^2, b^5, a(b^2), b^2a, b^2aba(b^2)}
      - {b, b^2, a(b^2), b^2a, b^2(a^2)(b^2)} (4 descendants)
        
        {b, b^2, a(b^2), b^2a, b^2a(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2)(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2(a^2)(b^2), b^2aba(b^2)}
      - {b, b^2, a(b^2), b^2a, b^2a(b^3)} (3 descendants)
        
        {b, b^2, a(b^2), b^2a, b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2a(b^3), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^2a(b^3), b^2aba(b^2)}
      - {b, b^2, a(b^2), b^2a, b^3a(b^2)} (2 descendants)
        
        {b, b^2, a(b^2), b^2a, b^2(a^3)(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), b^2a, b^3a(b^2), b^2aba(b^2)}
      - {b, b^2, a(b^2), b^2a, b^2(a^3)(b^2)} (1 descendant)
        
        {b, b^2, a(b^2), b^2a, b^2(a^3)(b^2), b^2aba(b^2)}
      - {b, b^2, a(b^2), b^2a, b^2aba(b^2)} (0 descendants)
    - {b, b^2, b^3, a(b^2)} (19 descendants)
      - {b, b^2, b^3, a(b^2), a^2(b^2)} (23 descendants)
        
        {b, b^2, b^3, a(b^2), a(b^3), a^2(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), ba(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^2ab}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^3a}
        
        {b, b^2, b^3, b^4, a(b^2), a^2(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), a^3(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), ba(b^3)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, a(b^2), a^2(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b(a^3)(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), a^2(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), a^2(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^3(a^3)(b^2)}
        
        {b, b^2, b^3, a(b^2), a^2(b^2), b^4(a^2)(b^2)}
      - {b, b^2, b^3, a(b^2), a(b^3)} (22 descendants)
        
        {b, b^2, b^3, a(b^2), a(b^3), ba(b^2)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^2ab}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^3a}
        
        {b, b^2, b^3, b^4, a(b^2), a(b^3)}
        
        {b, b^2, b^3, a(b^2), a(b^3), a^2(b^3)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), a(b^3), ba(b^3)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, a(b^2), a(b^3)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), a(b^3)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), a(b^3)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^2), a(b^3), b^4a(b^3)}
      - {b, b^2, b^3, a(b^2), ba(b^2)} (21 descendants)
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^2ab}
        
        {b, b^2, b^3, a(b^2), b^3a, ba(b^2)}
        
        {b, b^2, b^3, b^4, a(b^2), ba(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), aba(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), ba(b^3)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, a(b^2), ba(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), baba(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), ba(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^2aba(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), ba(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^3aba(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^2), b^5a(b^2)}
      - {b, b^2, b^3, a(b^2), b^2ab} (15 descendants)
        
        {b, b^2, b^3, a(b^2), b^3a, b^2ab}
        
        {b, b^2, b^3, b^4, a(b^2), b^2ab}
        
        {b, b^2, b^3, a(b^2), b(a^2)(b^2), b^2ab}
        
        {b, b^2, b^3, a(b^2), ba(b^3), b^2ab}
        
        {b, b^2, b^3, a(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2ab, b^3ab}
        
        {b, b^2, b^3, b^5, a(b^2), b^2ab}
        
        {b, b^2, b^3, a(b^2), b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), b^2ab}
        
        {b, b^2, b^3, a(b^2), b^2ab, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^2ab, b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), b^2ab}
      - {b, b^2, b^3, a(b^2), b^3a} (20 descendants)
        
        {b, b^2, b^3, b^4, a(b^2), b^3a}
        
        {b, b^2, b^3, a(b^2), b^3a, b(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^3a, ba(b^3)}
        
        {b, b^2, b^3, a(b^2), b^3a, b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), b^3a, b^3(a^2)}
        
        {b, b^2, b^3, a(b^2), b^3a, b^3ab}
        
        {b, b^2, b^3, b^5, a(b^2), b^3a}
        
        {b, b^2, b^3, a(b^2), b^3a, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^3a, b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^3a, b^3(a^2)b}
        
        {b, b^2, b^3, a(b^2), b^3a, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), b^3a}
        
        {b, b^2, b^3, a(b^2), b^3a, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^3a, b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^3a, b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), b^3a}
        
        {b, b^2, b^3, a(b^2), b^3a, b^3(a^3)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^3a, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^2), b^3a, b^3aba(b^2)}
        
        {b, b^2, b^3, a(b^2), b^3a, b^3a(b^4)}
      - {b, b^2, b^3, b^4, a(b^2)} (25 descendants)
        
        {b, b^2, b^3, b^4, a(b^2), a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^3, b^4, a(b^2), ba(b^3)}
        
        {b, b^2, b^3, b^4, a(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, b^4, a(b^2), b^3ab}
        
        {b, b^2, b^3, b^4, a(b^2), b^4a}
        
        {b, b^2, b^3, b^4, b^5, a(b^2)}
        
        {b, b^2, b^3, b^4, a(b^2), ba(b^4)}
        
        {b, b^2, b^3, b^4, a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^4, a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^4, a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^4, a(b^2), b^4ab}
        
        {b, b^2, b^3, b^4, b^6, a(b^2)}
        
        {b, b^2, b^3, b^4, a(b^2), b^2a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^4, a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^4, a(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, a(b^2)}
        
        {b, b^2, b^3, b^4, a(b^2), b^3a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^2), b^4(a^2)(b^2)}
        
        {b, b^2, b^3, b^4, a(b^2), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, a(b^2), b^5a(b^2)}
        
        {b, b^2, b^3, b^4, b^8, a(b^2)}
        
        {b, b^2, b^3, b^4, a(b^2), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, a(b^2)}
      - {b, b^2, b^3, a(b^2), b(a^2)(b^2)} (12 descendants)
        
        {b, b^2, b^3, a(b^2), ba(b^3), b(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), b(a^2)(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, a(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b(a^2)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b(a^2)(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), b(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b(a^2)(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b(a^2)(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), b(a^2)(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), b(a^2)(b^2)}
      - {b, b^2, b^3, a(b^2), ba(b^3)} (11 descendants)
        
        {b, b^2, b^3, a(b^2), ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, a(b^2), ba(b^3)}
        
        {b, b^2, b^3, a(b^2), ba(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), ba(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), ba(b^3)}
        
        {b, b^2, b^3, a(b^2), ba(b^3), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), ba(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), ba(b^3), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), ba(b^3)}
      - {b, b^2, b^3, a(b^2), b^2a(b^2)} (10 descendants)
        
        {b, b^2, b^3, a(b^2), b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, a(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^2a(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), b^2a(b^2)}
      - {b, b^2, b^3, a(b^2), b^3ab} (9 descendants)
        
        {b, b^2, b^3, b^5, a(b^2), b^3ab}
        
        {b, b^2, b^3, a(b^2), b^2(a^2)(b^2), b^3ab}
        
        {b, b^2, b^3, a(b^2), b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, a(b^2), b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), b^3ab}
        
        {b, b^2, b^3, a(b^2), b^3ab, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^3ab, b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), b^3ab}
      - {b, b^2, b^3, b^5, a(b^2)} (9 descendants)
        
        {b, b^2, b^3, b^5, a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^5, a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^5, a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^6, a(b^2)}
        
        {b, b^2, b^3, b^5, a(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^5, a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^5, a(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^5, b^7, a(b^2)}
        
        {b, b^2, b^3, b^5, b^9, a(b^2)}
      - {b, b^2, b^3, a(b^2), b^2(a^2)(b^2)} (7 descendants)
        
        {b, b^2, b^3, a(b^2), b^2a(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2(a^2)(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2(a^2)(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^2(a^2)(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), b^2(a^2)(b^2)}
      - {b, b^2, b^3, a(b^2), b^2a(b^3)} (6 descendants)
        
        {b, b^2, b^3, a(b^2), b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^2a(b^3), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^2a(b^3), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), b^2a(b^3)}
      - {b, b^2, b^3, a(b^2), b^3a(b^2)} (5 descendants)
        
        {b, b^2, b^3, b^6, a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, a(b^2), b^3a(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, a(b^2), b^3a(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), b^3a(b^2)}
      - {b, b^2, b^3, b^6, a(b^2)} (4 descendants)
        
        {b, b^2, b^3, b^6, a(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^6, a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^6, a(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^6, b^7, a(b^2)}
      - {b, b^2, b^3, a(b^2), b^3(a^2)(b^2)} (3 descendants)
        
        {b, b^2, b^3, a(b^2), b^3a(b^3), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^2), b^3(a^2)(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), b^3(a^2)(b^2)}
      - {b, b^2, b^3, a(b^2), b^3a(b^3)} (2 descendants)
        
        {b, b^2, b^3, a(b^2), b^3a(b^3), b^4a(b^2)}
        
        {b, b^2, b^3, b^7, a(b^2), b^3a(b^3)}
      - {b, b^2, b^3, a(b^2), b^4a(b^2)} (1 descendant)
        
        {b, b^2, b^3, b^7, a(b^2), b^4a(b^2)}
      - {b, b^2, b^3, b^7, a(b^2)} (0 descendants)
    - {b, b^2, a(b^2), a^2(b^2)} (12 descendants)
      - {b, b^2, a(b^2), a^2(b^2), ba(b^2)} (15 descendants)
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), b^2ab}
        
        {b, b^2, b^4, a(b^2), a^2(b^2), ba(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), ba(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), aba(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), a^2(b^2), ba(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), b(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), ba(b^2), b^4a(b^2)}
      - {b, b^2, a(b^2), a^2(b^2), b^2ab} (10 descendants)
        
        {b, b^2, b^4, a(b^2), a^2(b^2), b^2ab}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b^2ab}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2), b^2ab}
        
        {b, b^2, a(b^2), a^2(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), a^2(b^2), b^2ab}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^3)(b^2), b^2ab}
        
        {b, b^2, a(b^2), a^2(b^2), b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2ab, b^3a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2ab, b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2ab, b^3(a^2)(b^2)}
      - {b, b^2, b^4, a(b^2), a^2(b^2)} (10 descendants)
        
        {b, b^2, b^4, a(b^2), a^2(b^2), a^3(b^2)}
        
        {b, b^2, b^4, a(b^2), a^2(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), a^2(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, b^5, a(b^2), a^2(b^2)}
        
        {b, b^2, b^4, a(b^2), a^2(b^2), b(a^3)(b^2)}
        
        {b, b^2, b^4, a(b^2), a^2(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), a^2(b^2), b^3a(b^2)}
        
        {b, b^2, b^4, a(b^2), a^2(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, b^4, a(b^2), a^2(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^4, b^7, a(b^2), a^2(b^2)}
      - {b, b^2, a(b^2), a^2(b^2), a^3(b^2)} (12 descendants)
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), a^2(b^2), a^3(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), a^4(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b(a^4)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b^2(a^4)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), a^3(b^2), b^3(a^3)(b^2)}
      - {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2)} (11 descendants)
        
        {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), a^2(b^2), b(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2), ab(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2), b(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2), bab(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2), b^2ab(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^2)(b^2), b^4(a^2)(b^2)}
      - {b, b^2, a(b^2), a^2(b^2), b^2a(b^2)} (6 descendants)
        
        {b, b^2, b^5, a(b^2), a^2(b^2), b^2a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^3)(b^2), b^2a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2a(b^2), b^3(a^2)(b^2)}
      - {b, b^2, b^5, a(b^2), a^2(b^2)} (5 descendants)
        
        {b, b^2, b^5, a(b^2), a^2(b^2), b(a^3)(b^2)}
        
        {b, b^2, b^5, a(b^2), a^2(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^5, a(b^2), a^2(b^2), b^3a(b^2)}
        
        {b, b^2, b^5, a(b^2), a^2(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, b^5, a(b^2), a^2(b^2), b^3(a^2)(b^2)}
      - {b, b^2, a(b^2), a^2(b^2), b(a^3)(b^2)} (4 descendants)
        
        {b, b^2, a(b^2), a^2(b^2), b(a^3)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^3)(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^3)(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b(a^3)(b^2), b^3(a^2)(b^2)}
      - {b, b^2, a(b^2), a^2(b^2), b^2(a^2)(b^2)} (3 descendants)
        
        {b, b^2, a(b^2), a^2(b^2), b^2(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2(a^2)(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^2(a^2)(b^2), b^3(a^2)(b^2)}
      - {b, b^2, a(b^2), a^2(b^2), b^3a(b^2)} (2 descendants)
        
        {b, b^2, a(b^2), a^2(b^2), b^2(a^3)(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), a^2(b^2), b^3a(b^2), b^3(a^2)(b^2)}
      - {b, b^2, a(b^2), a^2(b^2), b^2(a^3)(b^2)} (1 descendant)
        
        {b, b^2, a(b^2), a^2(b^2), b^2(a^3)(b^2), b^3(a^2)(b^2)}
      - {b, b^2, a(b^2), a^2(b^2), b^3(a^2)(b^2)} (0 descendants)
    - {b, b^2, a(b^2), ba(b^2)} (11 descendants)
      - {b, b^2, a(b^2), ba(b^2), b^2ab} (10 descendants)
        
        {b, b^2, b^4, a(b^2), ba(b^2), b^2ab}
        
        {b, b^2, a(b^2), ba(b^2), b^2ab, aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b(a^2)(b^2), b^2ab}
        
        {b, b^2, a(b^2), ba(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba(b^2), b^2ab}
        
        {b, b^2, a(b^2), ba(b^2), b^2ab, baba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2ab, b^3a(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2ab, b^2aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2ab, b^4a(b^2)}
      - {b, b^2, b^4, a(b^2), ba(b^2)} (10 descendants)
        
        {b, b^2, b^4, a(b^2), ba(b^2), aba(b^2)}
        
        {b, b^2, b^4, a(b^2), ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, b^5, a(b^2), ba(b^2)}
        
        {b, b^2, b^4, a(b^2), ba(b^2), baba(b^2)}
        
        {b, b^2, b^4, a(b^2), ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^4, a(b^2), ba(b^2), b^2aba(b^2)}
        
        {b, b^2, b^4, a(b^2), ba(b^2), b^4a(b^2)}
        
        {b, b^2, b^4, b^7, a(b^2), ba(b^2)}
      - {b, b^2, a(b^2), ba(b^2), aba(b^2)} (12 descendants)
        
        {b, b^2, a(b^2), ba(b^2), b(a^2)(b^2), aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2a(b^2), aba(b^2)}
        
        {b, b^2, b^5, a(b^2), ba(b^2), aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), aba(b^2), a^2ba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), aba(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2(a^2)(b^2), aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^3a(b^2), aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), aba(b^2), b(a^2)ba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), aba(b^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^4a(b^2), aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), aba(b^2), b^2(a^2)ba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), aba(b^2), b^3aba(b^2)}
      - {b, b^2, a(b^2), ba(b^2), b(a^2)(b^2)} (7 descendants)
        
        {b, b^2, a(b^2), ba(b^2), b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba(b^2), b(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b(a^2)(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b(a^2)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b(a^2)(b^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b(a^2)(b^2), b^4a(b^2)}
      - {b, b^2, a(b^2), ba(b^2), b^2a(b^2)} (10 descendants)
        
        {b, b^2, b^5, a(b^2), ba(b^2), b^2a(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2a(b^2), a(b^2)a(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2a(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2a(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2a(b^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2a(b^2), b^4a(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2a(b^2), b^2a(b^2)a(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2a(b^2), b^5a(b^2)}
      - {b, b^2, b^5, a(b^2), ba(b^2)} (5 descendants)
        
        {b, b^2, b^5, a(b^2), ba(b^2), baba(b^2)}
        
        {b, b^2, b^5, a(b^2), ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^5, a(b^2), ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^5, a(b^2), ba(b^2), b^2aba(b^2)}
        
        {b, b^2, b^5, a(b^2), ba(b^2), b^4a(b^2)}
      - {b, b^2, a(b^2), ba(b^2), baba(b^2)} (4 descendants)
        
        {b, b^2, a(b^2), ba(b^2), b^2(a^2)(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^3a(b^2), baba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), baba(b^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^4a(b^2), baba(b^2)}
      - {b, b^2, a(b^2), ba(b^2), b^2(a^2)(b^2)} (3 descendants)
        
        {b, b^2, a(b^2), ba(b^2), b^2(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2(a^2)(b^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^2(a^2)(b^2), b^4a(b^2)}
      - {b, b^2, a(b^2), ba(b^2), b^3a(b^2)} (2 descendants)
        
        {b, b^2, a(b^2), ba(b^2), b^3a(b^2), b^2aba(b^2)}
        
        {b, b^2, a(b^2), ba(b^2), b^3a(b^2), b^4a(b^2)}
      - {b, b^2, a(b^2), ba(b^2), b^2aba(b^2)} (1 descendant)
        
        {b, b^2, a(b^2), ba(b^2), b^4a(b^2), b^2aba(b^2)}
      - {b, b^2, a(b^2), ba(b^2), b^4a(b^2)} (0 descendants)
    - {b, b^2, a(b^2), b^2ab} (6 descendants)
      - {b, b^2, b^4, a(b^2), b^2ab} (7 descendants)
        
        {b, b^2, b^4, a(b^2), b(a^2)(b^2), b^2ab}
        
        {b, b^2, b^4, a(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^4, b^5, a(b^2), b^2ab}
        
        {b, b^2, b^4, a(b^2), b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), b^2ab, b^3a(b^2)}
        
        {b, b^2, b^4, a(b^2), b^2ab, b^2a(b^4)}
        
        {b, b^2, b^4, b^7, a(b^2), b^2ab}
      - {b, b^2, a(b^2), b(a^2)(b^2), b^2ab} (5 descendants)
        
        {b, b^2, a(b^2), b(a^2)(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, a(b^2), b(a^2)(b^2), b^2ab}
        
        {b, b^2, a(b^2), b(a^2)(b^2), b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), b(a^2)(b^2), b^2ab, b^3a(b^2)}
        
        {b, b^2, a(b^2), b(a^2)(b^2), b^2ab, b^2ab(a^2)(b^2)}
      - {b, b^2, a(b^2), b^2ab, b^2a(b^2)} (5 descendants)
        
        {b, b^2, b^5, a(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, a(b^2), b^2ab, b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), b^2ab, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), b^2ab, b^2a(b^2), b^2a(b^2)ab}
        
        {b, b^2, a(b^2), b^2ab, b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, b^5, a(b^2), b^2ab} (2 descendants)
        
        {b, b^2, b^5, a(b^2), b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, b^5, a(b^2), b^2ab, b^3a(b^2)}
      - {b, b^2, a(b^2), b^2ab, b^2(a^2)(b^2)} (1 descendant)
        
        {b, b^2, a(b^2), b^2ab, b^2(a^2)(b^2), b^3a(b^2)}
      - {b, b^2, a(b^2), b^2ab, b^3a(b^2)} (0 descendants)
    - {b, b^2, b^4, a(b^2)} (6 descendants)
      - {b, b^2, b^4, a(b^2), b(a^2)(b^2)} (6 descendants)
        
        {b, b^2, b^4, a(b^2), b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, b^5, a(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), b(a^2)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), b(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, b^4, b^7, a(b^2), b(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), b(a^2)(b^2), b^4(a^2)(b^2)}
      - {b, b^2, b^4, a(b^2), b^2a(b^2)} (5 descendants)
        
        {b, b^2, b^4, b^5, a(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, a(b^2), b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^4, a(b^2), b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^4, b^7, a(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, a(b^2), b^2a(b^2), b^5a(b^2)}
      - {b, b^2, b^4, b^5, a(b^2)} (5 descendants)
        
        {b, b^2, b^4, b^5, a(b^2), a(b^5)}
        
        {b, b^2, b^4, b^5, a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^4, b^5, a(b^2), b^3a(b^2)}
        
        {b, b^2, b^4, b^5, b^7, a(b^2)}
        
        {b, b^2, b^4, b^5, b^8, a(b^2)}
      - {b, b^2, b^4, a(b^2), b^2(a^2)(b^2)} (2 descendants)
        
        {b, b^2, b^4, a(b^2), b^2(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, b^4, b^7, a(b^2), b^2(a^2)(b^2)}
      - {b, b^2, b^4, a(b^2), b^3a(b^2)} (1 descendant)
        
        {b, b^2, b^4, b^7, a(b^2), b^3a(b^2)}
      - {b, b^2, b^4, b^7, a(b^2)} (0 descendants)
    - {b, b^2, a(b^2), b(a^2)(b^2)} (4 descendants)
      - {b, b^2, a(b^2), b(a^2)(b^2), b^2a(b^2)} (3 descendants)
        
        {b, b^2, b^5, a(b^2), b(a^2)(b^2), b^2a(b^2)}
        
        {b, b^2, a(b^2), b(a^2)(b^2), b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, a(b^2), b(a^2)(b^2), b^2a(b^2), b^3a(b^2)}
      - {b, b^2, b^5, a(b^2), b(a^2)(b^2)} (2 descendants)
        
        {b, b^2, b^5, a(b^2), b(a^2)(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^5, a(b^2), b(a^2)(b^2), b^3a(b^2)}
      - {b, b^2, a(b^2), b(a^2)(b^2), b^2(a^2)(b^2)} (2 descendants)
        
        {b, b^2, a(b^2), b(a^2)(b^2), b^2(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, a(b^2), b(a^2)(b^2), b^2(a^2)(b^2), a(b^2)(a^2)(b^2)}
      - {b, b^2, a(b^2), b(a^2)(b^2), b^3a(b^2)} (0 descendants)
    - {b, b^2, a(b^2), b^2a(b^2)} (3 descendants)
      - {b, b^2, b^5, a(b^2), b^2a(b^2)} (2 descendants)
        
        {b, b^2, b^5, a(b^2), b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^5, a(b^2), b^2a(b^2), b^3a(b^2)}
      - {b, b^2, a(b^2), b^2a(b^2), b^2(a^2)(b^2)} (1 descendant)
        
        {b, b^2, a(b^2), b^2a(b^2), b^2(a^2)(b^2), b^3a(b^2)}
      - {b, b^2, a(b^2), b^2a(b^2), b^3a(b^2)} (2 descendants)
        
        {b, b^2, a(b^2), b^2a(b^2), b^3a(b^2), a(b^3)a(b^2)}
        
        {b, b^2, a(b^2), b^2a(b^2), b^3a(b^2), b^2a(b^3)a(b^2)}
    - {b, b^2, b^5, a(b^2)} (2 descendants)
      - {b, b^2, b^5, a(b^2), b^2(a^2)(b^2)} (1 descendant)
        
        {b, b^2, b^5, a(b^2), b^2(a^2)(b^2), b^3a(b^2)}
      - {b, b^2, b^5, a(b^2), b^3a(b^2)} (0 descendants)
    - {b, b^2, a(b^2), b^2(a^2)(b^2)} (1 descendant)
      - {b, b^2, a(b^2), b^2(a^2)(b^2), b^3a(b^2)} (0 descendants)
    - {b, b^2, a(b^2), b^3a(b^2)} (0 descendants)
  - {b, b^2, bab} (8 descendants)
    - {b, b^2, b^2a, bab} (11 descendants)
      - {b, b^2, b^3, b^2a, bab} (20 descendants)
        
        {b, b^2, b^3, a(b^3), b^2a, bab}
        
        {b, b^2, b^3, b^2a, bab, ba(b^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), bab}
        
        {b, b^2, b^3, b^2a, bab, b^2ab}
        
        {b, b^2, b^3, b^2a, b^3a, bab}
        
        {b, b^2, b^3, b^4, b^2a, bab}
        
        {b, b^2, b^3, b^2a, bab, babab}
        
        {b, b^2, b^3, b^2a, bab, ba(b^3)}
        
        {b, b^2, b^3, b^2a, bab, b^2(a^2)b}
        
        {b, b^2, b^3, b^2a, bab, b^2a(b^2)}
        
        {b, b^2, b^3, b^2a, bab, b^3ab}
        
        {b, b^2, b^3, b^5, b^2a, bab}
        
        {b, b^2, b^3, b^2a, bab, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, bab, b^2a(b^3)}
        
        {b, b^2, b^3, b^2a, bab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a, bab}
        
        {b, b^2, b^3, b^2a, bab, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, bab, b^2a(b^4)}
        
        {b, b^2, b^3, b^2a, bab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, bab}
      - {b, b^2, b^2a, bab, ba(b^2)} (11 descendants)
        
        {b, b^2, b^2a, b^2(a^2), bab, ba(b^2)}
        
        {b, b^2, b^2a, bab, ba(b^2), b^2ab}
        
        {b, b^2, b^4, b^2a, bab, ba(b^2)}
        
        {b, b^2, b^2a, bab, ba(b^2), babab}
        
        {b, b^2, b^2a, bab, ba(b^2), ba(b^2)a}
        
        {b, b^2, b^2a, bab, ba(b^2), b^2(a^2)b}
        
        {b, b^2, b^2a, bab, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, b^2a, bab, ba(b^2)}
        
        {b, b^2, b^2a, bab, ba(b^2), baba(b^2)}
        
        {b, b^2, b^2a, bab, ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, bab, ba(b^2), b^2a(b^3)}
      - {b, b^2, b^2a, b^2(a^2), bab} (12 descendants)
        
        {b, b^2, b^2a, b^2(a^2), bab, b^2ab}
        
        {b, b^2, b^4, b^2a, b^2(a^2), bab}
        
        {b, b^2, b^2a, b^2(a^2), bab, babab}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), bab}
        
        {b, b^2, b^2a, b^2(a^2), bab, b^2(a^2)b}
        
        {b, b^2, b^2a, b^2(a^2), bab, b^2a(b^2)}
        
        {b, b^2, b^5, b^2a, b^2(a^2), bab}
        
        {b, b^2, b^2a, b^2(a^2), bab, b^2(a^3)b}
        
        {b, b^2, b^2a, b^2(a^2), bab, b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), bab, b^2a(b^3)}
        
        {b, b^2, b^2a, b^2(a^2), bab, b^2(a^3)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), bab, b^2(a^2)(b^3)}
      - {b, b^2, b^2a, bab, b^2ab} (11 descendants)
        
        {b, b^2, b^4, b^2a, bab, b^2ab}
        
        {b, b^2, b^2a, bab, b^2ab, babab}
        
        {b, b^2, b^2a, bab, b^2ab, b^2(a^2)b}
        
        {b, b^2, b^2a, bab, b^2ab, b^2aba}
        
        {b, b^2, b^2a, bab, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, b^2a, bab, b^2ab}
        
        {b, b^2, b^2a, bab, b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, bab, b^2ab, b^2abab}
        
        {b, b^2, b^2a, bab, b^2ab, b^2a(b^3)}
        
        {b, b^2, b^2a, bab, b^2ab, b^2aba(b^2)}
        
        {b, b^2, b^2a, bab, b^2ab, b^2a(b^4)}
      - {b, b^2, b^4, b^2a, bab} (9 descendants)
        
        {b, b^2, b^4, b^2a, bab, babab}
        
        {b, b^2, b^4, b^2a, bab, b^2(a^2)b}
        
        {b, b^2, b^4, b^2a, bab, b^2a(b^2)}
        
        {b, b^2, b^4, b^5, b^2a, bab}
        
        {b, b^2, b^4, b^2a, bab, ba(b^4)}
        
        {b, b^2, b^4, b^2a, bab, b^2(a^2)(b^2)}
        
        {b, b^2, b^4, b^2a, bab, b^2a(b^3)}
        
        {b, b^2, b^4, b^2a, bab, b^4ab}
        
        {b, b^2, b^4, b^7, b^2a, bab}
      - {b, b^2, b^2a, bab, babab} (6 descendants)
        
        {b, b^2, b^2a, bab, b^2(a^2)b, babab}
        
        {b, b^2, b^2a, bab, b^2a(b^2), babab}
        
        {b, b^2, b^5, b^2a, bab, babab}
        
        {b, b^2, b^2a, bab, b^2(a^2)(b^2), babab}
        
        {b, b^2, b^2a, bab, b^2a(b^3), babab}
        
        {b, b^2, b^2a, bab, babab, bababab}
      - {b, b^2, b^2a, bab, b^2(a^2)b} (5 descendants)
        
        {b, b^2, b^2a, bab, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, b^5, b^2a, bab, b^2(a^2)b}
        
        {b, b^2, b^2a, bab, b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, bab, b^2a(b^3), b^2(a^2)b}
        
        {b, b^2, b^2a, bab, b^2(a^2)b, b^2(a^2)bab}
      - {b, b^2, b^2a, bab, b^2a(b^2)} (4 descendants)
        
        {b, b^2, b^5, b^2a, bab, b^2a(b^2)}
        
        {b, b^2, b^2a, bab, b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, bab, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^2a, bab, b^2a(b^2), b^2a(b^2)ab}
      - {b, b^2, b^5, b^2a, bab} (2 descendants)
        
        {b, b^2, b^5, b^2a, bab, b^2(a^2)(b^2)}
        
        {b, b^2, b^5, b^2a, bab, b^2a(b^3)}
      - {b, b^2, b^2a, bab, b^2(a^2)(b^2)} (1 descendant)
        
        {b, b^2, b^2a, bab, b^2a(b^3), b^2(a^2)(b^2)}
      - {b, b^2, b^2a, bab, b^2a(b^3)} (0 descendants)
    - {b, b^2, b^3, bab} (15 descendants)
      - {b, b^2, b^3, a(b^3), bab} (19 descendants)
        
        {b, b^2, b^3, a(b^3), bab, ba(b^2)}
        
        {b, b^2, b^3, a(b^3), bab, b^2ab}
        
        {b, b^2, b^3, a(b^3), b^3a, bab}
        
        {b, b^2, b^3, b^4, a(b^3), bab}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), bab}
        
        {b, b^2, b^3, a(b^3), bab, babab}
        
        {b, b^2, b^3, a(b^3), bab, ba(b^3)}
        
        {b, b^2, b^3, a(b^3), bab, b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), bab, b^3ab}
        
        {b, b^2, b^3, b^5, a(b^3), bab}
        
        {b, b^2, b^3, a(b^3), bab, b(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), bab, b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), bab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), bab}
        
        {b, b^2, b^3, a(b^3), bab, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), bab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), bab}
        
        {b, b^2, b^3, a(b^3), bab, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), bab, b^4a(b^3)}
      - {b, b^2, b^3, bab, ba(b^2)} (14 descendants)
        
        {b, b^2, b^3, bab, ba(b^2), b^2ab}
        
        {b, b^2, b^3, b^3a, bab, ba(b^2)}
        
        {b, b^2, b^3, b^4, bab, ba(b^2)}
        
        {b, b^2, b^3, bab, ba(b^2), babab}
        
        {b, b^2, b^3, bab, ba(b^2), ba(b^3)}
        
        {b, b^2, b^3, bab, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, bab, ba(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, bab, ba(b^2)}
        
        {b, b^2, b^3, bab, ba(b^2), baba(b^2)}
        
        {b, b^2, b^3, bab, ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, bab, ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, bab, ba(b^2)}
        
        {b, b^2, b^3, bab, ba(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, bab, ba(b^2)}
      - {b, b^2, b^3, bab, b^2ab} (13 descendants)
        
        {b, b^2, b^3, b^3a, bab, b^2ab}
        
        {b, b^2, b^3, b^4, bab, b^2ab}
        
        {b, b^2, b^3, bab, b^2ab, babab}
        
        {b, b^2, b^3, bab, ba(b^3), b^2ab}
        
        {b, b^2, b^3, bab, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, bab, b^2ab, b^3ab}
        
        {b, b^2, b^3, b^5, bab, b^2ab}
        
        {b, b^2, b^3, bab, b^2ab, b^2abab}
        
        {b, b^2, b^3, bab, b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, bab, b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, bab, b^2ab}
        
        {b, b^2, b^3, bab, b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, bab, b^2ab}
      - {b, b^2, b^3, b^3a, bab} (16 descendants)
        
        {b, b^2, b^3, b^4, b^3a, bab}
        
        {b, b^2, b^3, b^3a, bab, babab}
        
        {b, b^2, b^3, b^3a, bab, ba(b^3)}
        
        {b, b^2, b^3, b^3a, bab, b^2a(b^2)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), bab}
        
        {b, b^2, b^3, b^3a, bab, b^3ab}
        
        {b, b^2, b^3, b^5, b^3a, bab}
        
        {b, b^2, b^3, b^3a, bab, b^2a(b^3)}
        
        {b, b^2, b^3, b^3a, bab, b^3(a^2)b}
        
        {b, b^2, b^3, b^3a, bab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^3a, bab}
        
        {b, b^2, b^3, b^3a, bab, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^3a, bab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^3a, bab}
        
        {b, b^2, b^3, b^3a, bab, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, bab, b^3a(b^4)}
      - {b, b^2, b^3, b^4, bab} (21 descendants)
        
        {b, b^2, b^3, b^4, a(b^4), bab}
        
        {b, b^2, b^3, b^4, bab, babab}
        
        {b, b^2, b^3, b^4, bab, ba(b^3)}
        
        {b, b^2, b^3, b^4, bab, b^2a(b^2)}
        
        {b, b^2, b^3, b^4, bab, b^3ab}
        
        {b, b^2, b^3, b^4, b^4a, bab}
        
        {b, b^2, b^3, b^4, b^5, bab}
        
        {b, b^2, b^3, b^4, bab, ba(b^4)}
        
        {b, b^2, b^3, b^4, bab, b^2a(b^3)}
        
        {b, b^2, b^3, b^4, bab, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, bab, b^4ab}
        
        {b, b^2, b^3, b^4, b^6, bab}
        
        {b, b^2, b^3, b^4, bab, b^2a(b^4)}
        
        {b, b^2, b^3, b^4, bab, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, bab, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, bab}
        
        {b, b^2, b^3, b^4, bab, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, bab, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, bab}
        
        {b, b^2, b^3, b^4, bab, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, bab}
      - {b, b^2, b^3, bab, babab} (10 descendants)
        
        {b, b^2, b^3, bab, ba(b^3), babab}
        
        {b, b^2, b^3, bab, b^2a(b^2), babab}
        
        {b, b^2, b^3, bab, b^3ab, babab}
        
        {b, b^2, b^3, b^5, bab, babab}
        
        {b, b^2, b^3, bab, b^2a(b^3), babab}
        
        {b, b^2, b^3, bab, b^3a(b^2), babab}
        
        {b, b^2, b^3, b^6, bab, babab}
        
        {b, b^2, b^3, bab, babab, bababab}
        
        {b, b^2, b^3, bab, b^3a(b^3), babab}
        
        {b, b^2, b^3, b^7, bab, babab}
      - {b, b^2, b^3, bab, ba(b^3)} (9 descendants)
        
        {b, b^2, b^3, bab, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, bab, ba(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, bab, ba(b^3)}
        
        {b, b^2, b^3, bab, ba(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, bab, ba(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, bab, ba(b^3)}
        
        {b, b^2, b^3, bab, ba(b^3), baba(b^3)}
        
        {b, b^2, b^3, bab, ba(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, bab, ba(b^3)}
      - {b, b^2, b^3, bab, b^2a(b^2)} (7 descendants)
        
        {b, b^2, b^3, bab, b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, bab, b^2a(b^2)}
        
        {b, b^2, b^3, bab, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, bab, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, bab, b^2a(b^2)}
        
        {b, b^2, b^3, bab, b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, bab, b^2a(b^2)}
      - {b, b^2, b^3, bab, b^3ab} (7 descendants)
        
        {b, b^2, b^3, b^5, bab, b^3ab}
        
        {b, b^2, b^3, bab, b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, bab, b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, bab, b^3ab}
        
        {b, b^2, b^3, bab, b^3ab, b^3abab}
        
        {b, b^2, b^3, bab, b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, bab, b^3ab}
      - {b, b^2, b^3, b^5, bab} (8 descendants)
        
        {b, b^2, b^3, b^5, bab, b^2a(b^3)}
        
        {b, b^2, b^3, b^5, bab, b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^6, bab}
        
        {b, b^2, b^3, b^5, bab, ba(b^5)}
        
        {b, b^2, b^3, b^5, bab, b^3a(b^3)}
        
        {b, b^2, b^3, b^5, bab, b^5ab}
        
        {b, b^2, b^3, b^5, b^7, bab}
        
        {b, b^2, b^3, b^5, b^9, bab}
      - {b, b^2, b^3, bab, b^2a(b^3)} (4 descendants)
        
        {b, b^2, b^3, bab, b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, bab, b^2a(b^3)}
        
        {b, b^2, b^3, bab, b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, bab, b^2a(b^3)}
      - {b, b^2, b^3, bab, b^3a(b^2)} (3 descendants)
        
        {b, b^2, b^3, b^6, bab, b^3a(b^2)}
        
        {b, b^2, b^3, bab, b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, bab, b^3a(b^2)}
      - {b, b^2, b^3, b^6, bab} (2 descendants)
        
        {b, b^2, b^3, b^6, bab, b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, bab}
      - {b, b^2, b^3, bab, b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^7, bab, b^3a(b^3)}
      - {b, b^2, b^3, b^7, bab} (0 descendants)
    - {b, b^2, bab, ba(b^2)} (6 descendants)
      - {b, b^2, bab, ba(b^2), b^2ab} (8 descendants)
        
        {b, b^2, b^4, bab, ba(b^2), b^2ab}
        
        {b, b^2, bab, ba(b^2), b^2ab, babab}
        
        {b, b^2, bab, ba(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, bab, ba(b^2), b^2ab}
        
        {b, b^2, bab, ba(b^2), b^2ab, baba(b^2)}
        
        {b, b^2, bab, ba(b^2), b^2ab, ba(b^2)ab}
        
        {b, b^2, bab, ba(b^2), b^2ab, b^2abab}
        
        {b, b^2, bab, ba(b^2), b^2ab, b^2aba(b^2)}
      - {b, b^2, b^4, bab, ba(b^2)} (8 descendants)
        
        {b, b^2, b^4, bab, ba(b^2), babab}
        
        {b, b^2, b^4, bab, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, b^5, bab, ba(b^2)}
        
        {b, b^2, b^4, bab, ba(b^2), baba(b^2)}
        
        {b, b^2, b^4, bab, ba(b^2), ba(b^4)}
        
        {b, b^2, b^4, bab, ba(b^2), b^4ab}
        
        {b, b^2, b^4, bab, ba(b^2), b^4a(b^2)}
        
        {b, b^2, b^4, b^7, bab, ba(b^2)}
      - {b, b^2, bab, ba(b^2), babab} (4 descendants)
        
        {b, b^2, bab, ba(b^2), b^2a(b^2), babab}
        
        {b, b^2, b^5, bab, ba(b^2), babab}
        
        {b, b^2, bab, ba(b^2), babab, baba(b^2)}
        
        {b, b^2, bab, ba(b^2), babab, bababab}
      - {b, b^2, bab, ba(b^2), b^2a(b^2)} (4 descendants)
        
        {b, b^2, b^5, bab, ba(b^2), b^2a(b^2)}
        
        {b, b^2, bab, ba(b^2), b^2a(b^2), baba(b^2)}
        
        {b, b^2, bab, ba(b^2), b^2a(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, bab, ba(b^2), b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, b^5, bab, ba(b^2)} (2 descendants)
        
        {b, b^2, b^5, bab, ba(b^2), baba(b^2)}
        
        {b, b^2, b^5, bab, ba(b^2), ba(b^5)}
      - {b, b^2, bab, ba(b^2), baba(b^2)} (0 descendants)
    - {b, b^2, bab, b^2ab} (5 descendants)
      - {b, b^2, b^4, bab, b^2ab} (8 descendants)
        
        {b, b^2, b^4, bab, b^2ab, babab}
        
        {b, b^2, b^4, bab, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^4, b^5, bab, b^2ab}
        
        {b, b^2, b^4, bab, ba(b^4), b^2ab}
        
        {b, b^2, b^4, bab, b^2ab, b^2abab}
        
        {b, b^2, b^4, bab, b^2ab, b^4ab}
        
        {b, b^2, b^4, bab, b^2ab, b^2a(b^4)}
        
        {b, b^2, b^4, b^7, bab, b^2ab}
      - {b, b^2, bab, b^2ab, babab} (4 descendants)
        
        {b, b^2, bab, b^2ab, b^2a(b^2), babab}
        
        {b, b^2, b^5, bab, b^2ab, babab}
        
        {b, b^2, bab, b^2ab, babab, b^2abab}
        
        {b, b^2, bab, b^2ab, babab, bababab}
      - {b, b^2, bab, b^2ab, b^2a(b^2)} (4 descendants)
        
        {b, b^2, b^5, bab, b^2ab, b^2a(b^2)}
        
        {b, b^2, bab, b^2ab, b^2a(b^2), b^2abab}
        
        {b, b^2, bab, b^2ab, b^2a(b^2), b^2a(b^2)ab}
        
        {b, b^2, bab, b^2ab, b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, b^5, bab, b^2ab} (2 descendants)
        
        {b, b^2, b^5, bab, b^2ab, b^2abab}
        
        {b, b^2, b^5, bab, b^2ab, b^5ab}
      - {b, b^2, bab, b^2ab, b^2abab} (0 descendants)
    - {b, b^2, b^4, bab} (6 descendants)
      - {b, b^2, b^4, bab, babab} (6 descendants)
        
        {b, b^2, b^4, bab, b^2a(b^2), babab}
        
        {b, b^2, b^4, b^5, bab, babab}
        
        {b, b^2, b^4, bab, ba(b^4), babab}
        
        {b, b^2, b^4, bab, b^4ab, babab}
        
        {b, b^2, b^4, bab, babab, bababab}
        
        {b, b^2, b^4, b^7, bab, babab}
      - {b, b^2, b^4, bab, b^2a(b^2)} (4 descendants)
        
        {b, b^2, b^4, b^5, bab, b^2a(b^2)}
        
        {b, b^2, b^4, bab, ba(b^4), b^2a(b^2)}
        
        {b, b^2, b^4, bab, b^2a(b^2), b^4ab}
        
        {b, b^2, b^4, b^7, bab, b^2a(b^2)}
      - {b, b^2, b^4, b^5, bab} (4 descendants)
        
        {b, b^2, b^4, b^5, bab, ba(b^4)}
        
        {b, b^2, b^4, b^5, bab, b^4ab}
        
        {b, b^2, b^4, b^5, b^7, bab}
        
        {b, b^2, b^4, b^5, b^8, bab}
      - {b, b^2, b^4, bab, ba(b^4)} (2 descendants)
        
        {b, b^2, b^4, bab, ba(b^4), b^4ab}
        
        {b, b^2, b^4, b^7, bab, ba(b^4)}
      - {b, b^2, b^4, bab, b^4ab} (1 descendant)
        
        {b, b^2, b^4, b^7, bab, b^4ab}
      - {b, b^2, b^4, b^7, bab} (0 descendants)
    - {b, b^2, bab, babab} (3 descendants)
      - {b, b^2, bab, b^2a(b^2), babab} (2 descendants)
        
        {b, b^2, b^5, bab, b^2a(b^2), babab}
        
        {b, b^2, bab, b^2a(b^2), babab, bababab}
      - {b, b^2, b^5, bab, babab} (1 descendant)
        
        {b, b^2, b^5, bab, babab, bababab}
      - {b, b^2, bab, babab, bababab} (1 descendant)
        
        {b, b^2, bab, babab, bababab, babababab}
    - {b, b^2, bab, b^2a(b^2)} (1 descendant)
      - {b, b^2, b^5, bab, b^2a(b^2)} (0 descendants)
    - {b, b^2, b^5, bab} (0 descendants)
  - {b, b^2, b^2a} (10 descendants)
    - {b, b^2, b^3, b^2a} (19 descendants)
      - {b, b^2, b^3, a(b^3), b^2a} (24 descendants)
        
        {b, b^2, b^3, a(b^3), b^2a, ba(b^2)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^2(a^2)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^2ab}
        
        {b, b^2, b^3, a(b^3), b^2a, b^3a}
        
        {b, b^2, b^3, b^4, a(b^3), b^2a}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^2a}
        
        {b, b^2, b^3, a(b^3), b^2a, ba(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^2(a^2)b}
        
        {b, b^2, b^3, a(b^3), b^2a, b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^3ab}
        
        {b, b^2, b^3, b^5, a(b^3), b^2a}
        
        {b, b^2, b^3, a(b^3), b^2a, b(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), b^2a}
        
        {b, b^2, b^3, a(b^3), b^2a, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^2a(b^4)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), b^2a}
        
        {b, b^2, b^3, a(b^3), b^2a, b^2(a^3)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^2aba(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a, b^4a(b^3)}
      - {b, b^2, b^3, b^2a, ba(b^2)} (17 descendants)
        
        {b, b^2, b^3, b^2a, b^2(a^2), ba(b^2)}
        
        {b, b^2, b^3, b^2a, ba(b^2), b^2ab}
        
        {b, b^2, b^3, b^2a, b^3a, ba(b^2)}
        
        {b, b^2, b^3, b^4, b^2a, ba(b^2)}
        
        {b, b^2, b^3, b^2a, ba(b^2), ba(b^3)}
        
        {b, b^2, b^3, b^2a, ba(b^2), b^2(a^2)b}
        
        {b, b^2, b^3, b^2a, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, b^2a, ba(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, b^2a, ba(b^2)}
        
        {b, b^2, b^3, b^2a, ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^2a, ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a, ba(b^2)}
        
        {b, b^2, b^3, b^2a, ba(b^2), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, ba(b^2), b^2a(b^4)}
        
        {b, b^2, b^3, b^2a, ba(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, ba(b^2)}
      - {b, b^2, b^3, b^2a, b^2(a^2)} (21 descendants)
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2ab}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^3a}
        
        {b, b^2, b^3, b^4, b^2a, b^2(a^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), ba(b^3)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2(a^3)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2(a^2)b}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2a(b^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^3ab}
        
        {b, b^2, b^3, b^5, b^2a, b^2(a^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2(a^3)b}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a, b^2(a^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2(a^3)(b^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2a(b^4)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, b^2(a^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2(a^3)(b^3)}
        
        {b, b^2, b^3, b^2a, b^2(a^2), b^2(a^2)(b^4)}
      - {b, b^2, b^3, b^2a, b^2ab} (20 descendants)
        
        {b, b^2, b^3, b^2a, b^3a, b^2ab}
        
        {b, b^2, b^3, b^4, b^2a, b^2ab}
        
        {b, b^2, b^3, b^2a, ba(b^3), b^2ab}
        
        {b, b^2, b^3, b^2a, b^2ab, b^2(a^2)b}
        
        {b, b^2, b^3, b^2a, b^2ab, b^2aba}
        
        {b, b^2, b^3, b^2a, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, b^2a, b^2ab, b^3ab}
        
        {b, b^2, b^3, b^5, b^2a, b^2ab}
        
        {b, b^2, b^3, b^2a, b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, b^2ab, b^2abab}
        
        {b, b^2, b^3, b^2a, b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, b^2a, b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a, b^2ab}
        
        {b, b^2, b^3, b^2a, b^2ab, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, b^2ab, b^2aba(b^2)}
        
        {b, b^2, b^3, b^2a, b^2ab, b^2a(b^4)}
        
        {b, b^2, b^3, b^2a, b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, b^2ab}
        
        {b, b^2, b^3, b^2a, b^2ab, b^2aba(b^3)}
        
        {b, b^2, b^3, b^2a, b^2ab, b^2a(b^5)}
      - {b, b^2, b^3, b^2a, b^3a} (19 descendants)
        
        {b, b^2, b^3, b^4, b^2a, b^3a}
        
        {b, b^2, b^3, b^2a, b^3a, ba(b^3)}
        
        {b, b^2, b^3, b^2a, b^3a, b^2(a^2)b}
        
        {b, b^2, b^3, b^2a, b^3a, b^2a(b^2)}
        
        {b, b^2, b^3, b^2a, b^3a, b^3(a^2)}
        
        {b, b^2, b^3, b^2a, b^3a, b^3ab}
        
        {b, b^2, b^3, b^5, b^2a, b^3a}
        
        {b, b^2, b^3, b^2a, b^3a, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, b^3a, b^2a(b^3)}
        
        {b, b^2, b^3, b^2a, b^3a, b^3(a^2)b}
        
        {b, b^2, b^3, b^2a, b^3a, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a, b^3a}
        
        {b, b^2, b^3, b^2a, b^3a, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, b^3a, b^2a(b^4)}
        
        {b, b^2, b^3, b^2a, b^3a, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, b^3a, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, b^3a}
        
        {b, b^2, b^3, b^2a, b^3a, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, b^3a, b^3a(b^4)}
      - {b, b^2, b^3, b^4, b^2a} (25 descendants)
        
        {b, b^2, b^3, b^4, a(b^4), b^2a}
        
        {b, b^2, b^3, b^4, b^2a, ba(b^3)}
        
        {b, b^2, b^3, b^4, b^2a, b^2(a^2)b}
        
        {b, b^2, b^3, b^4, b^2a, b^2a(b^2)}
        
        {b, b^2, b^3, b^4, b^2a, b^3ab}
        
        {b, b^2, b^3, b^4, b^2a, b^4a}
        
        {b, b^2, b^3, b^4, b^5, b^2a}
        
        {b, b^2, b^3, b^4, b^2a, ba(b^4)}
        
        {b, b^2, b^3, b^4, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^4, b^2a, b^2a(b^3)}
        
        {b, b^2, b^3, b^4, b^2a, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^2a, b^4ab}
        
        {b, b^2, b^3, b^4, b^6, b^2a}
        
        {b, b^2, b^3, b^4, b^2a, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^4, b^2a, b^2a(b^4)}
        
        {b, b^2, b^3, b^4, b^2a, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^2a, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, b^2a}
        
        {b, b^2, b^3, b^4, b^2a, b^2(a^2)(b^4)}
        
        {b, b^2, b^3, b^4, b^2a, b^2a(b^5)}
        
        {b, b^2, b^3, b^4, b^2a, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^2a, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^2a}
        
        {b, b^2, b^3, b^4, b^2a, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^2a}
      - {b, b^2, b^3, b^2a, ba(b^3)} (12 descendants)
        
        {b, b^2, b^3, b^2a, ba(b^3), b^2(a^2)b}
        
        {b, b^2, b^3, b^2a, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, b^2a, ba(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, b^2a, ba(b^3)}
        
        {b, b^2, b^3, b^2a, ba(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, ba(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, b^2a, ba(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a, ba(b^3)}
        
        {b, b^2, b^3, b^2a, ba(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, ba(b^3), b^2a(b^4)}
        
        {b, b^2, b^3, b^2a, ba(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, ba(b^3)}
      - {b, b^2, b^3, b^2a, b^2(a^2)b} (11 descendants)
        
        {b, b^2, b^3, b^2a, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, b^3, b^2a, b^2(a^2)b, b^3ab}
        
        {b, b^2, b^3, b^5, b^2a, b^2(a^2)b}
        
        {b, b^2, b^3, b^2a, b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, b^2a(b^3), b^2(a^2)b}
        
        {b, b^2, b^3, b^2a, b^2(a^2)b, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a, b^2(a^2)b}
        
        {b, b^2, b^3, b^2a, b^2(a^2)b, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, b^2a(b^4), b^2(a^2)b}
        
        {b, b^2, b^3, b^2a, b^2(a^2)b, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, b^2(a^2)b}
      - {b, b^2, b^3, b^2a, b^2a(b^2)} (10 descendants)
        
        {b, b^2, b^3, b^2a, b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, b^2a, b^2a(b^2)}
        
        {b, b^2, b^3, b^2a, b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^2a, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a, b^2a(b^2)}
        
        {b, b^2, b^3, b^2a, b^2a(b^2), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, b^2a(b^2), b^2a(b^4)}
        
        {b, b^2, b^3, b^2a, b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, b^2a(b^2)}
      - {b, b^2, b^3, b^2a, b^3ab} (9 descendants)
        
        {b, b^2, b^3, b^5, b^2a, b^3ab}
        
        {b, b^2, b^3, b^2a, b^2(a^2)(b^2), b^3ab}
        
        {b, b^2, b^3, b^2a, b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, b^2a, b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a, b^3ab}
        
        {b, b^2, b^3, b^2a, b^2(a^2)(b^3), b^3ab}
        
        {b, b^2, b^3, b^2a, b^2a(b^4), b^3ab}
        
        {b, b^2, b^3, b^2a, b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, b^3ab}
      - {b, b^2, b^3, b^5, b^2a} (9 descendants)
        
        {b, b^2, b^3, b^5, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^5, b^2a, b^2a(b^3)}
        
        {b, b^2, b^3, b^5, b^2a, b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^6, b^2a}
        
        {b, b^2, b^3, b^5, b^2a, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^5, b^2a, b^2a(b^4)}
        
        {b, b^2, b^3, b^5, b^2a, b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, b^2a}
        
        {b, b^2, b^3, b^5, b^9, b^2a}
      - {b, b^2, b^3, b^2a, b^2(a^2)(b^2)} (7 descendants)
        
        {b, b^2, b^3, b^2a, b^2a(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2)(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2)(b^2), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, b^2a(b^4), b^2(a^2)(b^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2)(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, b^2(a^2)(b^2)}
      - {b, b^2, b^3, b^2a, b^2a(b^3)} (6 descendants)
        
        {b, b^2, b^3, b^2a, b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a, b^2a(b^3)}
        
        {b, b^2, b^3, b^2a, b^2a(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, b^2a(b^3), b^2a(b^4)}
        
        {b, b^2, b^3, b^2a, b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, b^2a(b^3)}
      - {b, b^2, b^3, b^2a, b^3a(b^2)} (5 descendants)
        
        {b, b^2, b^3, b^6, b^2a, b^3a(b^2)}
        
        {b, b^2, b^3, b^2a, b^2(a^2)(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^2a, b^2a(b^4), b^3a(b^2)}
        
        {b, b^2, b^3, b^2a, b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, b^3a(b^2)}
      - {b, b^2, b^3, b^6, b^2a} (4 descendants)
        
        {b, b^2, b^3, b^6, b^2a, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^6, b^2a, b^2a(b^4)}
        
        {b, b^2, b^3, b^6, b^2a, b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, b^2a}
      - {b, b^2, b^3, b^2a, b^2(a^2)(b^3)} (3 descendants)
        
        {b, b^2, b^3, b^2a, b^2a(b^4), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^2a, b^2(a^2)(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, b^2(a^2)(b^3)}
      - {b, b^2, b^3, b^2a, b^2a(b^4)} (2 descendants)
        
        {b, b^2, b^3, b^2a, b^2a(b^4), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a, b^2a(b^4)}
      - {b, b^2, b^3, b^2a, b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^7, b^2a, b^3a(b^3)}
      - {b, b^2, b^3, b^7, b^2a} (0 descendants)
    - {b, b^2, b^2a, ba(b^2)} (8 descendants)
      - {b, b^2, b^2a, b^2(a^2), ba(b^2)} (11 descendants)
        
        {b, b^2, b^2a, b^2(a^2), ba(b^2), b^2ab}
        
        {b, b^2, b^4, b^2a, b^2(a^2), ba(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), ba(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), ba(b^2), b^2(a^2)b}
        
        {b, b^2, b^2a, b^2(a^2), ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^5, b^2a, b^2(a^2), ba(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), ba(b^2), b^2(a^3)b}
        
        {b, b^2, b^2a, b^2(a^2), ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^2a, b^2(a^2), ba(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), ba(b^2), b^2(a^2)(b^3)}
      - {b, b^2, b^2a, ba(b^2), b^2ab} (10 descendants)
        
        {b, b^2, b^4, b^2a, ba(b^2), b^2ab}
        
        {b, b^2, b^2a, ba(b^2), b^2ab, b^2(a^2)b}
        
        {b, b^2, b^2a, ba(b^2), b^2ab, b^2aba}
        
        {b, b^2, b^2a, ba(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, b^2a, ba(b^2), b^2ab}
        
        {b, b^2, b^2a, ba(b^2), b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, ba(b^2), b^2ab, b^2abab}
        
        {b, b^2, b^2a, ba(b^2), b^2ab, b^2a(b^3)}
        
        {b, b^2, b^2a, ba(b^2), b^2ab, b^2aba(b^2)}
        
        {b, b^2, b^2a, ba(b^2), b^2ab, b^2a(b^4)}
      - {b, b^2, b^4, b^2a, ba(b^2)} (7 descendants)
        
        {b, b^2, b^4, b^2a, ba(b^2), b^2(a^2)b}
        
        {b, b^2, b^4, b^2a, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, b^5, b^2a, ba(b^2)}
        
        {b, b^2, b^4, b^2a, ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^4, b^2a, ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^4, b^2a, ba(b^2), b^4a(b^2)}
        
        {b, b^2, b^4, b^7, b^2a, ba(b^2)}
      - {b, b^2, b^2a, ba(b^2), b^2(a^2)b} (5 descendants)
        
        {b, b^2, b^2a, ba(b^2), b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, b^5, b^2a, ba(b^2), b^2(a^2)b}
        
        {b, b^2, b^2a, ba(b^2), b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, ba(b^2), b^2a(b^3), b^2(a^2)b}
        
        {b, b^2, b^2a, ba(b^2), b^2(a^2)b, b^2(a^2)ba(b^2)}
      - {b, b^2, b^2a, ba(b^2), b^2a(b^2)} (5 descendants)
        
        {b, b^2, b^5, b^2a, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^2a, ba(b^2), b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, ba(b^2), b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^2a, ba(b^2), b^2a(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, b^2a, ba(b^2), b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, b^5, b^2a, ba(b^2)} (2 descendants)
        
        {b, b^2, b^5, b^2a, ba(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^5, b^2a, ba(b^2), b^2a(b^3)}
      - {b, b^2, b^2a, ba(b^2), b^2(a^2)(b^2)} (1 descendant)
        
        {b, b^2, b^2a, ba(b^2), b^2a(b^3), b^2(a^2)(b^2)}
      - {b, b^2, b^2a, ba(b^2), b^2a(b^3)} (0 descendants)
    - {b, b^2, b^2a, b^2(a^2)} (11 descendants)
      - {b, b^2, b^2a, b^2(a^2), b^2ab} (14 descendants)
        
        {b, b^2, b^4, b^2a, b^2(a^2), b^2ab}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2ab}
        
        {b, b^2, b^2a, b^2(a^2), b^2ab, b^2(a^2)b}
        
        {b, b^2, b^2a, b^2(a^2), b^2ab, b^2aba}
        
        {b, b^2, b^2a, b^2(a^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^5, b^2a, b^2(a^2), b^2ab}
        
        {b, b^2, b^2a, b^2(a^2), b^2ab, b^2(a^3)b}
        
        {b, b^2, b^2a, b^2(a^2), b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2ab, b^2abab}
        
        {b, b^2, b^2a, b^2(a^2), b^2ab, b^2a(b^3)}
        
        {b, b^2, b^2a, b^2(a^2), b^2ab, b^2(a^3)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2ab, b^2(a^2)(b^3)}
        
        {b, b^2, b^2a, b^2(a^2), b^2ab, b^2aba(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2ab, b^2a(b^4)}
      - {b, b^2, b^4, b^2a, b^2(a^2)} (10 descendants)
        
        {b, b^2, b^4, b^2a, b^2(a^2), b^2(a^3)}
        
        {b, b^2, b^4, b^2a, b^2(a^2), b^2(a^2)b}
        
        {b, b^2, b^4, b^2a, b^2(a^2), b^2a(b^2)}
        
        {b, b^2, b^4, b^5, b^2a, b^2(a^2)}
        
        {b, b^2, b^4, b^2a, b^2(a^2), b^2(a^3)b}
        
        {b, b^2, b^4, b^2a, b^2(a^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^4, b^2a, b^2(a^2), b^2a(b^3)}
        
        {b, b^2, b^4, b^2a, b^2(a^2), b^2(a^3)(b^2)}
        
        {b, b^2, b^4, b^2a, b^2(a^2), b^2(a^2)(b^3)}
        
        {b, b^2, b^4, b^7, b^2a, b^2(a^2)}
      - {b, b^2, b^2a, b^2(a^2), b^2(a^3)} (12 descendants)
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2(a^2)b}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2a(b^2)}
        
        {b, b^2, b^5, b^2a, b^2(a^2), b^2(a^3)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2(a^4)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2(a^3)b}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2a(b^3)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2(a^4)b}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2(a^3)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2(a^4)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3), b^2(a^3)(b^3)}
      - {b, b^2, b^2a, b^2(a^2), b^2(a^2)b} (11 descendants)
        
        {b, b^2, b^2a, b^2(a^2), b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, b^5, b^2a, b^2(a^2), b^2(a^2)b}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)b, b^2(a^3)b}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)b, b^2(a^2)ba}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2a(b^3), b^2(a^2)b}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)b, b^2(a^3)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)b, b^2(a^2)bab}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)b, b^2(a^2)(b^3)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)b, b^2(a^2)ba(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)b, b^2(a^2)(b^4)}
      - {b, b^2, b^2a, b^2(a^2), b^2a(b^2)} (6 descendants)
        
        {b, b^2, b^5, b^2a, b^2(a^2), b^2a(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2a(b^2), b^2(a^3)b}
        
        {b, b^2, b^2a, b^2(a^2), b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^2a, b^2(a^2), b^2a(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2a(b^2), b^2(a^2)(b^3)}
      - {b, b^2, b^5, b^2a, b^2(a^2)} (5 descendants)
        
        {b, b^2, b^5, b^2a, b^2(a^2), b^2(a^3)b}
        
        {b, b^2, b^5, b^2a, b^2(a^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^5, b^2a, b^2(a^2), b^2a(b^3)}
        
        {b, b^2, b^5, b^2a, b^2(a^2), b^2(a^3)(b^2)}
        
        {b, b^2, b^5, b^2a, b^2(a^2), b^2(a^2)(b^3)}
      - {b, b^2, b^2a, b^2(a^2), b^2(a^3)b} (4 descendants)
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)(b^2), b^2(a^3)b}
        
        {b, b^2, b^2a, b^2(a^2), b^2a(b^3), b^2(a^3)b}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^3)b, b^2(a^3)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)(b^3), b^2(a^3)b}
      - {b, b^2, b^2a, b^2(a^2), b^2(a^2)(b^2)} (3 descendants)
        
        {b, b^2, b^2a, b^2(a^2), b^2a(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)(b^2), b^2(a^3)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)(b^2), b^2(a^2)(b^3)}
      - {b, b^2, b^2a, b^2(a^2), b^2a(b^3)} (2 descendants)
        
        {b, b^2, b^2a, b^2(a^2), b^2a(b^3), b^2(a^3)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2), b^2a(b^3), b^2(a^2)(b^3)}
      - {b, b^2, b^2a, b^2(a^2), b^2(a^3)(b^2)} (1 descendant)
        
        {b, b^2, b^2a, b^2(a^2), b^2(a^2)(b^3), b^2(a^3)(b^2)}
      - {b, b^2, b^2a, b^2(a^2), b^2(a^2)(b^3)} (0 descendants)
    - {b, b^2, b^2a, b^2ab} (10 descendants)
      - {b, b^2, b^4, b^2a, b^2ab} (10 descendants)
        
        {b, b^2, b^4, b^2a, b^2ab, b^2(a^2)b}
        
        {b, b^2, b^4, b^2a, b^2ab, b^2aba}
        
        {b, b^2, b^4, b^2a, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^4, b^5, b^2a, b^2ab}
        
        {b, b^2, b^4, b^2a, b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, b^4, b^2a, b^2ab, b^2abab}
        
        {b, b^2, b^4, b^2a, b^2ab, b^2a(b^3)}
        
        {b, b^2, b^4, b^2a, b^2ab, b^2aba(b^2)}
        
        {b, b^2, b^4, b^2a, b^2ab, b^2a(b^4)}
        
        {b, b^2, b^4, b^7, b^2a, b^2ab}
      - {b, b^2, b^2a, b^2ab, b^2(a^2)b} (8 descendants)
        
        {b, b^2, b^2a, b^2ab, b^2(a^2)b, b^2aba}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, b^5, b^2a, b^2ab, b^2(a^2)b}
        
        {b, b^2, b^2a, b^2ab, b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2(a^2)b, b^2abab}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^3), b^2(a^2)b}
        
        {b, b^2, b^2a, b^2ab, b^2(a^2)b, b^2aba(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^4), b^2(a^2)b}
      - {b, b^2, b^2a, b^2ab, b^2aba} (11 descendants)
        
        {b, b^2, b^2a, b^2ab, b^2a(b^2), b^2aba}
        
        {b, b^2, b^5, b^2a, b^2ab, b^2aba}
        
        {b, b^2, b^2a, b^2ab, b^2(a^2)(b^2), b^2aba}
        
        {b, b^2, b^2a, b^2ab, b^2aba, b^2ab(a^2)}
        
        {b, b^2, b^2a, b^2ab, b^2aba, b^2abab}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^3), b^2aba}
        
        {b, b^2, b^2a, b^2ab, b^2aba, b^2ab(a^2)b}
        
        {b, b^2, b^2a, b^2ab, b^2aba, b^2aba(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^4), b^2aba}
        
        {b, b^2, b^2a, b^2ab, b^2aba, b^2ab(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2aba, b^2aba(b^3)}
      - {b, b^2, b^2a, b^2ab, b^2a(b^2)} (10 descendants)
        
        {b, b^2, b^5, b^2a, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^2), b^2abab}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^2), b^2a(b^2)a}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^2), b^2aba(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^2), b^2a(b^2)ab}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^2), b^2a(b^4)}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^2), b^2a(b^2)a(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^2), b^2a(b^5)}
      - {b, b^2, b^5, b^2a, b^2ab} (5 descendants)
        
        {b, b^2, b^5, b^2a, b^2ab, b^2(a^2)(b^2)}
        
        {b, b^2, b^5, b^2a, b^2ab, b^2abab}
        
        {b, b^2, b^5, b^2a, b^2ab, b^2a(b^3)}
        
        {b, b^2, b^5, b^2a, b^2ab, b^2aba(b^2)}
        
        {b, b^2, b^5, b^2a, b^2ab, b^2a(b^4)}
      - {b, b^2, b^2a, b^2ab, b^2(a^2)(b^2)} (4 descendants)
        
        {b, b^2, b^2a, b^2ab, b^2(a^2)(b^2), b^2abab}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2(a^2)(b^2), b^2aba(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^4), b^2(a^2)(b^2)}
      - {b, b^2, b^2a, b^2ab, b^2abab} (3 descendants)
        
        {b, b^2, b^2a, b^2ab, b^2a(b^3), b^2abab}
        
        {b, b^2, b^2a, b^2ab, b^2abab, b^2aba(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^4), b^2abab}
      - {b, b^2, b^2a, b^2ab, b^2a(b^3)} (2 descendants)
        
        {b, b^2, b^2a, b^2ab, b^2a(b^3), b^2aba(b^2)}
        
        {b, b^2, b^2a, b^2ab, b^2a(b^3), b^2a(b^4)}
      - {b, b^2, b^2a, b^2ab, b^2aba(b^2)} (1 descendant)
        
        {b, b^2, b^2a, b^2ab, b^2a(b^4), b^2aba(b^2)}
      - {b, b^2, b^2a, b^2ab, b^2a(b^4)} (0 descendants)
    - {b, b^2, b^4, b^2a} (6 descendants)
      - {b, b^2, b^4, b^2a, b^2(a^2)b} (6 descendants)
        
        {b, b^2, b^4, b^2a, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, b^4, b^5, b^2a, b^2(a^2)b}
        
        {b, b^2, b^4, b^2a, b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, b^4, b^2a, b^2a(b^3), b^2(a^2)b}
        
        {b, b^2, b^4, b^7, b^2a, b^2(a^2)b}
        
        {b, b^2, b^4, b^2a, b^2(a^2)b, b^2(a^2)(b^4)}
      - {b, b^2, b^4, b^2a, b^2a(b^2)} (5 descendants)
        
        {b, b^2, b^4, b^5, b^2a, b^2a(b^2)}
        
        {b, b^2, b^4, b^2a, b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^4, b^2a, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^4, b^7, b^2a, b^2a(b^2)}
        
        {b, b^2, b^4, b^2a, b^2a(b^2), b^2a(b^5)}
      - {b, b^2, b^4, b^5, b^2a} (5 descendants)
        
        {b, b^2, b^4, b^5, b^2a, b^2(a^2)(b^2)}
        
        {b, b^2, b^4, b^5, b^2a, b^2a(b^3)}
        
        {b, b^2, b^4, b^5, b^2a, b^5a}
        
        {b, b^2, b^4, b^5, b^7, b^2a}
        
        {b, b^2, b^4, b^5, b^8, b^2a}
      - {b, b^2, b^4, b^2a, b^2(a^2)(b^2)} (2 descendants)
        
        {b, b^2, b^4, b^2a, b^2a(b^3), b^2(a^2)(b^2)}
        
        {b, b^2, b^4, b^7, b^2a, b^2(a^2)(b^2)}
      - {b, b^2, b^4, b^2a, b^2a(b^3)} (1 descendant)
        
        {b, b^2, b^4, b^7, b^2a, b^2a(b^3)}
      - {b, b^2, b^4, b^7, b^2a} (0 descendants)
    - {b, b^2, b^2a, b^2(a^2)b} (4 descendants)
      - {b, b^2, b^2a, b^2a(b^2), b^2(a^2)b} (3 descendants)
        
        {b, b^2, b^5, b^2a, b^2a(b^2), b^2(a^2)b}
        
        {b, b^2, b^2a, b^2a(b^2), b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2a(b^2), b^2a(b^3), b^2(a^2)b}
      - {b, b^2, b^5, b^2a, b^2(a^2)b} (2 descendants)
        
        {b, b^2, b^5, b^2a, b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, b^5, b^2a, b^2a(b^3), b^2(a^2)b}
      - {b, b^2, b^2a, b^2(a^2)b, b^2(a^2)(b^2)} (2 descendants)
        
        {b, b^2, b^2a, b^2a(b^3), b^2(a^2)b, b^2(a^2)(b^2)}
        
        {b, b^2, b^2a, b^2(a^2)b, b^2(a^2)(b^2), b^2(a^2)(b^2)a}
      - {b, b^2, b^2a, b^2a(b^3), b^2(a^2)b} (0 descendants)
    - {b, b^2, b^2a, b^2a(b^2)} (3 descendants)
      - {b, b^2, b^5, b^2a, b^2a(b^2)} (2 descendants)
        
        {b, b^2, b^5, b^2a, b^2a(b^2), b^2(a^2)(b^2)}
        
        {b, b^2, b^5, b^2a, b^2a(b^2), b^2a(b^3)}
      - {b, b^2, b^2a, b^2a(b^2), b^2(a^2)(b^2)} (1 descendant)
        
        {b, b^2, b^2a, b^2a(b^2), b^2a(b^3), b^2(a^2)(b^2)}
      - {b, b^2, b^2a, b^2a(b^2), b^2a(b^3)} (2 descendants)
        
        {b, b^2, b^2a, b^2a(b^2), b^2a(b^3), b^2a(b^3)a}
        
        {b, b^2, b^2a, b^2a(b^2), b^2a(b^3), b^2a(b^3)a(b^2)}
    - {b, b^2, b^5, b^2a} (2 descendants)
      - {b, b^2, b^5, b^2a, b^2(a^2)(b^2)} (1 descendant)
        
        {b, b^2, b^5, b^2a, b^2a(b^3), b^2(a^2)(b^2)}
      - {b, b^2, b^5, b^2a, b^2a(b^3)} (0 descendants)
    - {b, b^2, b^2a, b^2(a^2)(b^2)} (1 descendant)
      - {b, b^2, b^2a, b^2a(b^3), b^2(a^2)(b^2)} (0 descendants)
    - {b, b^2, b^2a, b^2a(b^3)} (0 descendants)
  - {b, b^2, b^3} (14 descendants)
    - {b, b^2, b^3, a(b^3)} (18 descendants)
      - {b, b^2, b^3, a(b^3), ba(b^2)} (17 descendants)
        
        {b, b^2, b^3, a(b^3), ba(b^2), b^2ab}
        
        {b, b^2, b^3, a(b^3), b^3a, ba(b^2)}
        
        {b, b^2, b^3, b^4, a(b^3), ba(b^2)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), ba(b^2)}
        
        {b, b^2, b^3, a(b^3), ba(b^2), ba(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), ba(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, a(b^3), ba(b^2)}
        
        {b, b^2, b^3, a(b^3), ba(b^2), b(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), ba(b^2)}
        
        {b, b^2, b^3, a(b^3), ba(b^2), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), ba(b^2)}
        
        {b, b^2, b^3, a(b^3), ba(b^2), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^2), b^4a(b^3)}
      - {b, b^2, b^3, a(b^3), b^2ab} (16 descendants)
        
        {b, b^2, b^3, a(b^3), b^3a, b^2ab}
        
        {b, b^2, b^3, b^4, a(b^3), b^2ab}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^2ab}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^2ab}
        
        {b, b^2, b^3, a(b^3), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), b^2ab, b^3ab}
        
        {b, b^2, b^3, b^5, a(b^3), b^2ab}
        
        {b, b^2, b^3, a(b^3), b(a^2)(b^3), b^2ab}
        
        {b, b^2, b^3, a(b^3), b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), b^2ab}
        
        {b, b^2, b^3, a(b^3), b^2ab, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), b^2ab}
        
        {b, b^2, b^3, a(b^3), b^2ab, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2ab, b^4a(b^3)}
      - {b, b^2, b^3, a(b^3), b^3a} (21 descendants)
        
        {b, b^2, b^3, b^4, a(b^3), b^3a}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^3a}
        
        {b, b^2, b^3, a(b^3), b^3a, ba(b^3)}
        
        {b, b^2, b^3, a(b^3), b^3a, b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), b^3a, b^3(a^2)}
        
        {b, b^2, b^3, a(b^3), b^3a, b^3ab}
        
        {b, b^2, b^3, b^5, a(b^3), b^3a}
        
        {b, b^2, b^3, a(b^3), b^3a, b(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^3a, b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), b^3a, b^3(a^2)b}
        
        {b, b^2, b^3, a(b^3), b^3a, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), b^3a}
        
        {b, b^2, b^3, a(b^3), b^3a, b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^3a, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, a(b^3), b^3a, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), b^3a}
        
        {b, b^2, b^3, a(b^3), b^3a, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^3a, b^3a(b^4)}
        
        {b, b^2, b^3, a(b^3), b^3a, b^4a(b^3)}
        
        {b, b^2, b^3, a(b^3), b^3a, b^3(a^3)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^3a, b^3aba(b^3)}
      - {b, b^2, b^3, b^4, a(b^3)} (26 descendants)
        
        {b, b^2, b^3, b^4, a(b^3), a^2(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^3), ba(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, b^4, a(b^3), b^3ab}
        
        {b, b^2, b^3, b^4, a(b^3), b^4a}
        
        {b, b^2, b^3, b^4, b^5, a(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), b(a^2)(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), ba(b^4)}
        
        {b, b^2, b^3, b^4, a(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^4, a(b^3), b^4ab}
        
        {b, b^2, b^3, b^4, b^6, a(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), b^2a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, a(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), b^3a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^3), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, a(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), b^4(a^2)(b^3)}
        
        {b, b^2, b^3, b^4, a(b^3), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^3), b^5a(b^3)}
        
        {b, b^2, b^3, b^4, b^9, a(b^3)}
      - {b, b^2, b^3, a(b^3), a^2(b^3)} (18 descendants)
        
        {b, b^2, b^3, a(b^3), a^2(b^3), ba(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, a(b^3), a^2(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), a^3(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), a^2(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b(a^3)(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), a^2(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^2(a^3)(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^4a(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^3(a^3)(b^3)}
        
        {b, b^2, b^3, a(b^3), a^2(b^3), b^4(a^2)(b^3)}
      - {b, b^2, b^3, a(b^3), ba(b^3)} (17 descendants)
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, a(b^3), ba(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), aba(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), ba(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), baba(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), ba(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^2aba(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^4a(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^3aba(b^3)}
        
        {b, b^2, b^3, a(b^3), ba(b^3), b^5a(b^3)}
      - {b, b^2, b^3, a(b^3), b^2a(b^2)} (11 descendants)
        
        {b, b^2, b^3, a(b^3), b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, a(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), b(a^2)(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), b^2a(b^2), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, a(b^3), b^2a(b^2), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a(b^2), b^4a(b^3)}
      - {b, b^2, b^3, a(b^3), b^3ab} (10 descendants)
        
        {b, b^2, b^3, b^5, a(b^3), b^3ab}
        
        {b, b^2, b^3, a(b^3), b(a^2)(b^3), b^3ab}
        
        {b, b^2, b^3, a(b^3), b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, a(b^3), b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), b^3ab}
        
        {b, b^2, b^3, a(b^3), b^2(a^2)(b^3), b^3ab}
        
        {b, b^2, b^3, a(b^3), b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), b^3ab}
        
        {b, b^2, b^3, a(b^3), b^3ab, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^3ab, b^4a(b^3)}
      - {b, b^2, b^3, b^5, a(b^3)} (10 descendants)
        
        {b, b^2, b^3, b^5, a(b^3), b(a^2)(b^3)}
        
        {b, b^2, b^3, b^5, a(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, b^5, a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^6, a(b^3)}
        
        {b, b^2, b^3, b^5, a(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^5, a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, a(b^3)}
        
        {b, b^2, b^3, b^5, a(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^5, a(b^3), b^4a(b^3)}
        
        {b, b^2, b^3, b^5, b^9, a(b^3)}
      - {b, b^2, b^3, a(b^3), b(a^2)(b^3)} (8 descendants)
        
        {b, b^2, b^3, a(b^3), b(a^2)(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), b(a^2)(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), b(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b(a^2)(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b(a^2)(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), b(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b(a^2)(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b(a^2)(b^3), b^4a(b^3)}
      - {b, b^2, b^3, a(b^3), b^2a(b^3)} (7 descendants)
        
        {b, b^2, b^3, a(b^3), b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, a(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2a(b^3), b^4a(b^3)}
      - {b, b^2, b^3, a(b^3), b^3a(b^2)} (6 descendants)
        
        {b, b^2, b^3, b^6, a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, a(b^3), b^2(a^2)(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, a(b^3), b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, a(b^3), b^3a(b^2), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^3a(b^2), b^4a(b^3)}
      - {b, b^2, b^3, b^6, a(b^3)} (5 descendants)
        
        {b, b^2, b^3, b^6, a(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, b^6, a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, a(b^3)}
        
        {b, b^2, b^3, b^6, a(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^6, a(b^3), b^4a(b^3)}
      - {b, b^2, b^3, a(b^3), b^2(a^2)(b^3)} (4 descendants)
        
        {b, b^2, b^3, a(b^3), b^2(a^2)(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), b^2(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2(a^2)(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^2(a^2)(b^3), b^4a(b^3)}
      - {b, b^2, b^3, a(b^3), b^3a(b^3)} (3 descendants)
        
        {b, b^2, b^3, b^7, a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, a(b^3), b^3a(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, a(b^3), b^3a(b^3), b^4a(b^3)}
      - {b, b^2, b^3, b^7, a(b^3)} (2 descendants)
        
        {b, b^2, b^3, b^7, a(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^7, a(b^3), b^4a(b^3)}
      - {b, b^2, b^3, a(b^3), b^3(a^2)(b^3)} (1 descendant)
        
        {b, b^2, b^3, a(b^3), b^3(a^2)(b^3), b^4a(b^3)}
      - {b, b^2, b^3, a(b^3), b^4a(b^3)} (0 descendants)
    - {b, b^2, b^3, ba(b^2)} (12 descendants)
      - {b, b^2, b^3, ba(b^2), b^2ab} (12 descendants)
        
        {b, b^2, b^3, b^3a, ba(b^2), b^2ab}
        
        {b, b^2, b^3, b^4, ba(b^2), b^2ab}
        
        {b, b^2, b^3, ba(b^2), ba(b^3), b^2ab}
        
        {b, b^2, b^3, ba(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, ba(b^2), b^2ab, b^3ab}
        
        {b, b^2, b^3, b^5, ba(b^2), b^2ab}
        
        {b, b^2, b^3, ba(b^2), b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, ba(b^2), b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba(b^2), b^2ab}
        
        {b, b^2, b^3, ba(b^2), b^2ab, b^2aba(b^2)}
        
        {b, b^2, b^3, ba(b^2), b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba(b^2), b^2ab}
      - {b, b^2, b^3, b^3a, ba(b^2)} (15 descendants)
        
        {b, b^2, b^3, b^4, b^3a, ba(b^2)}
        
        {b, b^2, b^3, b^3a, ba(b^2), ba(b^3)}
        
        {b, b^2, b^3, b^3a, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), ba(b^2)}
        
        {b, b^2, b^3, b^3a, ba(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, b^3a, ba(b^2)}
        
        {b, b^2, b^3, b^3a, ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^3a, ba(b^2), b^3(a^2)b}
        
        {b, b^2, b^3, b^3a, ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^3a, ba(b^2)}
        
        {b, b^2, b^3, b^3a, ba(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^3a, ba(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^3a, ba(b^2)}
        
        {b, b^2, b^3, b^3a, ba(b^2), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, ba(b^2), b^3a(b^4)}
      - {b, b^2, b^3, b^4, ba(b^2)} (20 descendants)
        
        {b, b^2, b^3, b^4, a(b^4), ba(b^2)}
        
        {b, b^2, b^3, b^4, ba(b^2), ba(b^3)}
        
        {b, b^2, b^3, b^4, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, b^4, ba(b^2), b^3ab}
        
        {b, b^2, b^3, b^4, b^4a, ba(b^2)}
        
        {b, b^2, b^3, b^4, b^5, ba(b^2)}
        
        {b, b^2, b^3, b^4, ba(b^2), ba(b^4)}
        
        {b, b^2, b^3, b^4, ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^4, ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^4, ba(b^2), b^4ab}
        
        {b, b^2, b^3, b^4, b^6, ba(b^2)}
        
        {b, b^2, b^3, b^4, ba(b^2), b^2a(b^4)}
        
        {b, b^2, b^3, b^4, ba(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^4, ba(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, ba(b^2)}
        
        {b, b^2, b^3, b^4, ba(b^2), b^3a(b^4)}
        
        {b, b^2, b^3, b^4, ba(b^2), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, ba(b^2)}
        
        {b, b^2, b^3, b^4, ba(b^2), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, ba(b^2)}
      - {b, b^2, b^3, ba(b^2), ba(b^3)} (8 descendants)
        
        {b, b^2, b^3, ba(b^2), ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, ba(b^2), ba(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, ba(b^2), ba(b^3)}
        
        {b, b^2, b^3, ba(b^2), ba(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, ba(b^2), ba(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba(b^2), ba(b^3)}
        
        {b, b^2, b^3, ba(b^2), ba(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba(b^2), ba(b^3)}
      - {b, b^2, b^3, ba(b^2), b^2a(b^2)} (9 descendants)
        
        {b, b^2, b^3, ba(b^2), b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, ba(b^2), b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, ba(b^2), b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, ba(b^2), b^2a(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, b^3, ba(b^2), b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^3, ba(b^2), b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, b^3, ba(b^2), b^3ab} (7 descendants)
        
        {b, b^2, b^3, b^5, ba(b^2), b^3ab}
        
        {b, b^2, b^3, ba(b^2), b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, ba(b^2), b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba(b^2), b^3ab}
        
        {b, b^2, b^3, ba(b^2), b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba(b^2), b^3ab}
        
        {b, b^2, b^3, ba(b^2), b^3ab, b^3aba(b^2)}
      - {b, b^2, b^3, b^5, ba(b^2)} (7 descendants)
        
        {b, b^2, b^3, b^5, ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^5, ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^6, ba(b^2)}
        
        {b, b^2, b^3, b^5, ba(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, ba(b^2)}
        
        {b, b^2, b^3, b^5, ba(b^2), b^5a(b^2)}
        
        {b, b^2, b^3, b^5, b^9, ba(b^2)}
      - {b, b^2, b^3, ba(b^2), b^2a(b^3)} (4 descendants)
        
        {b, b^2, b^3, ba(b^2), b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, ba(b^2), b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba(b^2), b^2a(b^3)}
      - {b, b^2, b^3, ba(b^2), b^3a(b^2)} (3 descendants)
        
        {b, b^2, b^3, b^6, ba(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, ba(b^2), b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba(b^2), b^3a(b^2)}
      - {b, b^2, b^3, b^6, ba(b^2)} (2 descendants)
        
        {b, b^2, b^3, b^6, ba(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, ba(b^2)}
      - {b, b^2, b^3, ba(b^2), b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^7, ba(b^2), b^3a(b^3)}
      - {b, b^2, b^3, b^7, ba(b^2)} (0 descendants)
    - {b, b^2, b^3, b^2ab} (11 descendants)
      - {b, b^2, b^3, b^3a, b^2ab} (15 descendants)
        
        {b, b^2, b^3, b^4, b^3a, b^2ab}
        
        {b, b^2, b^3, b^3a, ba(b^3), b^2ab}
        
        {b, b^2, b^3, b^3a, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^2ab}
        
        {b, b^2, b^3, b^3a, b^2ab, b^3ab}
        
        {b, b^2, b^3, b^5, b^3a, b^2ab}
        
        {b, b^2, b^3, b^3a, b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, b^3a, b^2ab, b^3(a^2)b}
        
        {b, b^2, b^3, b^3a, b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^3a, b^2ab}
        
        {b, b^2, b^3, b^3a, b^2ab, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^3a, b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^3a, b^2ab}
        
        {b, b^2, b^3, b^3a, b^2ab, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, b^2ab, b^3a(b^4)}
      - {b, b^2, b^3, b^4, b^2ab} (20 descendants)
        
        {b, b^2, b^3, b^4, a(b^4), b^2ab}
        
        {b, b^2, b^3, b^4, ba(b^3), b^2ab}
        
        {b, b^2, b^3, b^4, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, b^4, b^2ab, b^3ab}
        
        {b, b^2, b^3, b^4, b^4a, b^2ab}
        
        {b, b^2, b^3, b^4, b^5, b^2ab}
        
        {b, b^2, b^3, b^4, ba(b^4), b^2ab}
        
        {b, b^2, b^3, b^4, b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, b^4, b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^2ab, b^4ab}
        
        {b, b^2, b^3, b^4, b^6, b^2ab}
        
        {b, b^2, b^3, b^4, b^2ab, b^2a(b^4)}
        
        {b, b^2, b^3, b^4, b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^2ab, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, b^2ab}
        
        {b, b^2, b^3, b^4, b^2ab, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^2ab, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^2ab}
        
        {b, b^2, b^3, b^4, b^2ab, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^2ab}
      - {b, b^2, b^3, ba(b^3), b^2ab} (9 descendants)
        
        {b, b^2, b^3, ba(b^3), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, ba(b^3), b^2ab, b^3ab}
        
        {b, b^2, b^3, b^5, ba(b^3), b^2ab}
        
        {b, b^2, b^3, ba(b^3), b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, ba(b^3), b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba(b^3), b^2ab}
        
        {b, b^2, b^3, ba(b^3), b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba(b^3), b^2ab}
        
        {b, b^2, b^3, ba(b^3), b^2ab, b^2aba(b^3)}
      - {b, b^2, b^3, b^2ab, b^2a(b^2)} (9 descendants)
        
        {b, b^2, b^3, b^2ab, b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, b^2ab, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^2ab, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, b^2ab, b^2a(b^2), b^2a(b^2)ab}
        
        {b, b^2, b^3, b^2ab, b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^3, b^2ab, b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, b^3, b^2ab, b^3ab} (6 descendants)
        
        {b, b^2, b^3, b^5, b^2ab, b^3ab}
        
        {b, b^2, b^3, b^2ab, b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, b^2ab, b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2ab, b^3ab}
        
        {b, b^2, b^3, b^2ab, b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2ab, b^3ab}
      - {b, b^2, b^3, b^5, b^2ab} (7 descendants)
        
        {b, b^2, b^3, b^5, b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, b^5, b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^6, b^2ab}
        
        {b, b^2, b^3, b^5, b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, b^2ab}
        
        {b, b^2, b^3, b^5, b^2ab, b^2a(b^5)}
        
        {b, b^2, b^3, b^5, b^9, b^2ab}
      - {b, b^2, b^3, b^2ab, b^2a(b^3)} (4 descendants)
        
        {b, b^2, b^3, b^2ab, b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2ab, b^2a(b^3)}
        
        {b, b^2, b^3, b^2ab, b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2ab, b^2a(b^3)}
      - {b, b^2, b^3, b^2ab, b^3a(b^2)} (3 descendants)
        
        {b, b^2, b^3, b^6, b^2ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^2ab, b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2ab, b^3a(b^2)}
      - {b, b^2, b^3, b^6, b^2ab} (2 descendants)
        
        {b, b^2, b^3, b^6, b^2ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, b^2ab}
      - {b, b^2, b^3, b^2ab, b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^7, b^2ab, b^3a(b^3)}
      - {b, b^2, b^3, b^7, b^2ab} (0 descendants)
    - {b, b^2, b^3, b^3a} (15 descendants)
      - {b, b^2, b^3, b^4, b^3a} (26 descendants)
        
        {b, b^2, b^3, b^4, a(b^4), b^3a}
        
        {b, b^2, b^3, b^4, b^3a, ba(b^3)}
        
        {b, b^2, b^3, b^4, b^3a, b^2a(b^2)}
        
        {b, b^2, b^3, b^4, b^3a, b^3(a^2)}
        
        {b, b^2, b^3, b^4, b^3a, b^3ab}
        
        {b, b^2, b^3, b^4, b^3a, b^4a}
        
        {b, b^2, b^3, b^4, b^5, b^3a}
        
        {b, b^2, b^3, b^4, b^3a, ba(b^4)}
        
        {b, b^2, b^3, b^4, b^3a, b^2a(b^3)}
        
        {b, b^2, b^3, b^4, b^3a, b^3(a^2)b}
        
        {b, b^2, b^3, b^4, b^3a, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^3a, b^4ab}
        
        {b, b^2, b^3, b^4, b^6, b^3a}
        
        {b, b^2, b^3, b^4, b^3a, b^2a(b^4)}
        
        {b, b^2, b^3, b^4, b^3a, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^4, b^3a, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^3a, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, b^3a}
        
        {b, b^2, b^3, b^4, b^3a, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^4, b^3a, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^3a, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^3a}
        
        {b, b^2, b^3, b^4, b^3a, b^3(a^2)(b^4)}
        
        {b, b^2, b^3, b^4, b^3a, b^3a(b^5)}
        
        {b, b^2, b^3, b^4, b^3a, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^3a}
      - {b, b^2, b^3, b^3a, ba(b^3)} (13 descendants)
        
        {b, b^2, b^3, b^3a, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), ba(b^3)}
        
        {b, b^2, b^3, b^3a, ba(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, b^3a, ba(b^3)}
        
        {b, b^2, b^3, b^3a, ba(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, b^3a, ba(b^3), b^3(a^2)b}
        
        {b, b^2, b^3, b^3a, ba(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^3a, ba(b^3)}
        
        {b, b^2, b^3, b^3a, ba(b^3), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^3a, ba(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^3a, ba(b^3)}
        
        {b, b^2, b^3, b^3a, ba(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, ba(b^3), b^3a(b^4)}
      - {b, b^2, b^3, b^3a, b^2a(b^2)} (12 descendants)
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^2a(b^2)}
        
        {b, b^2, b^3, b^3a, b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, b^3a, b^2a(b^2)}
        
        {b, b^2, b^3, b^3a, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^3a, b^2a(b^2), b^3(a^2)b}
        
        {b, b^2, b^3, b^3a, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^3a, b^2a(b^2)}
        
        {b, b^2, b^3, b^3a, b^2a(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^3a, b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^3a, b^2a(b^2)}
        
        {b, b^2, b^3, b^3a, b^2a(b^2), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, b^2a(b^2), b^3a(b^4)}
      - {b, b^2, b^3, b^3a, b^3(a^2)} (16 descendants)
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3ab}
        
        {b, b^2, b^3, b^5, b^3a, b^3(a^2)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3(a^3)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3(a^2)b}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^3a, b^3(a^2)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3(a^3)b}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^3a, b^3(a^2)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3(a^3)(b^2)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3a(b^4)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3(a^3)(b^3)}
        
        {b, b^2, b^3, b^3a, b^3(a^2), b^3(a^2)(b^4)}
      - {b, b^2, b^3, b^3a, b^3ab} (15 descendants)
        
        {b, b^2, b^3, b^5, b^3a, b^3ab}
        
        {b, b^2, b^3, b^3a, b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, b^3a, b^3ab, b^3(a^2)b}
        
        {b, b^2, b^3, b^3a, b^3ab, b^3aba}
        
        {b, b^2, b^3, b^3a, b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^3a, b^3ab}
        
        {b, b^2, b^3, b^3a, b^3ab, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^3a, b^3ab, b^3abab}
        
        {b, b^2, b^3, b^3a, b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^3a, b^3ab}
        
        {b, b^2, b^3, b^3a, b^3ab, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, b^3ab, b^3aba(b^2)}
        
        {b, b^2, b^3, b^3a, b^3ab, b^3a(b^4)}
        
        {b, b^2, b^3, b^3a, b^3ab, b^3aba(b^3)}
        
        {b, b^2, b^3, b^3a, b^3ab, b^3a(b^5)}
      - {b, b^2, b^3, b^5, b^3a} (10 descendants)
        
        {b, b^2, b^3, b^5, b^3a, b^2a(b^3)}
        
        {b, b^2, b^3, b^5, b^3a, b^3(a^2)b}
        
        {b, b^2, b^3, b^5, b^3a, b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^6, b^3a}
        
        {b, b^2, b^3, b^5, b^3a, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^5, b^3a, b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, b^3a}
        
        {b, b^2, b^3, b^5, b^3a, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^5, b^3a, b^3a(b^4)}
        
        {b, b^2, b^3, b^5, b^9, b^3a}
      - {b, b^2, b^3, b^3a, b^2a(b^3)} (8 descendants)
        
        {b, b^2, b^3, b^3a, b^2a(b^3), b^3(a^2)b}
        
        {b, b^2, b^3, b^3a, b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^3a, b^2a(b^3)}
        
        {b, b^2, b^3, b^3a, b^2a(b^3), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^3a, b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^3a, b^2a(b^3)}
        
        {b, b^2, b^3, b^3a, b^2a(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, b^2a(b^3), b^3a(b^4)}
      - {b, b^2, b^3, b^3a, b^3(a^2)b} (7 descendants)
        
        {b, b^2, b^3, b^3a, b^3a(b^2), b^3(a^2)b}
        
        {b, b^2, b^3, b^6, b^3a, b^3(a^2)b}
        
        {b, b^2, b^3, b^3a, b^3(a^2)b, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^3a, b^3a(b^3), b^3(a^2)b}
        
        {b, b^2, b^3, b^7, b^3a, b^3(a^2)b}
        
        {b, b^2, b^3, b^3a, b^3(a^2)b, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, b^3a(b^4), b^3(a^2)b}
      - {b, b^2, b^3, b^3a, b^3a(b^2)} (6 descendants)
        
        {b, b^2, b^3, b^6, b^3a, b^3a(b^2)}
        
        {b, b^2, b^3, b^3a, b^3a(b^2), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^3a, b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^3a, b^3a(b^2)}
        
        {b, b^2, b^3, b^3a, b^3a(b^2), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, b^3a(b^2), b^3a(b^4)}
      - {b, b^2, b^3, b^6, b^3a} (5 descendants)
        
        {b, b^2, b^3, b^6, b^3a, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^6, b^3a, b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, b^3a}
        
        {b, b^2, b^3, b^6, b^3a, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^6, b^3a, b^3a(b^4)}
      - {b, b^2, b^3, b^3a, b^3(a^2)(b^2)} (4 descendants)
        
        {b, b^2, b^3, b^3a, b^3a(b^3), b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^7, b^3a, b^3(a^2)(b^2)}
        
        {b, b^2, b^3, b^3a, b^3(a^2)(b^2), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, b^3a(b^4), b^3(a^2)(b^2)}
      - {b, b^2, b^3, b^3a, b^3a(b^3)} (3 descendants)
        
        {b, b^2, b^3, b^7, b^3a, b^3a(b^3)}
        
        {b, b^2, b^3, b^3a, b^3a(b^3), b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^3a, b^3a(b^3), b^3a(b^4)}
      - {b, b^2, b^3, b^7, b^3a} (2 descendants)
        
        {b, b^2, b^3, b^7, b^3a, b^3(a^2)(b^3)}
        
        {b, b^2, b^3, b^7, b^3a, b^3a(b^4)}
      - {b, b^2, b^3, b^3a, b^3(a^2)(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^3a, b^3a(b^4), b^3(a^2)(b^3)}
      - {b, b^2, b^3, b^3a, b^3a(b^4)} (0 descendants)
    - {b, b^2, b^3, b^4} (20 descendants)
      - {b, b^2, b^3, b^4, a(b^4)} (25 descendants)
        
        {b, b^2, b^3, b^4, a(b^4), ba(b^3)}
        
        {b, b^2, b^3, b^4, a(b^4), b^2a(b^2)}
        
        {b, b^2, b^3, b^4, a(b^4), b^3ab}
        
        {b, b^2, b^3, b^4, a(b^4), b^4a}
        
        {b, b^2, b^3, b^4, b^5, a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), a^2(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), ba(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), b^2a(b^3)}
        
        {b, b^2, b^3, b^4, a(b^4), b^3a(b^2)}
        
        {b, b^2, b^3, b^4, a(b^4), b^4ab}
        
        {b, b^2, b^3, b^4, b^6, a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), b(a^2)(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), b^2a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), b^3a(b^3)}
        
        {b, b^2, b^3, b^4, a(b^4), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), b^2(a^2)(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), b^3a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), b^3(a^2)(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, a(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), b^4(a^2)(b^4)}
        
        {b, b^2, b^3, b^4, a(b^4), b^5a(b^4)}
      - {b, b^2, b^3, b^4, ba(b^3)} (18 descendants)
        
        {b, b^2, b^3, b^4, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, b^4, ba(b^3), b^3ab}
        
        {b, b^2, b^3, b^4, b^4a, ba(b^3)}
        
        {b, b^2, b^3, b^4, b^5, ba(b^3)}
        
        {b, b^2, b^3, b^4, ba(b^3), ba(b^4)}
        
        {b, b^2, b^3, b^4, ba(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, b^4, ba(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^4, ba(b^3), b^4ab}
        
        {b, b^2, b^3, b^4, b^6, ba(b^3)}
        
        {b, b^2, b^3, b^4, ba(b^3), b^2a(b^4)}
        
        {b, b^2, b^3, b^4, ba(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^4, ba(b^3), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, ba(b^3)}
        
        {b, b^2, b^3, b^4, ba(b^3), b^3a(b^4)}
        
        {b, b^2, b^3, b^4, ba(b^3), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, ba(b^3)}
        
        {b, b^2, b^3, b^4, ba(b^3), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, ba(b^3)}
      - {b, b^2, b^3, b^4, b^2a(b^2)} (17 descendants)
        
        {b, b^2, b^3, b^4, b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^4, b^4a, b^2a(b^2)}
        
        {b, b^2, b^3, b^4, b^5, b^2a(b^2)}
        
        {b, b^2, b^3, b^4, ba(b^4), b^2a(b^2)}
        
        {b, b^2, b^3, b^4, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^4, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^2a(b^2), b^4ab}
        
        {b, b^2, b^3, b^4, b^6, b^2a(b^2)}
        
        {b, b^2, b^3, b^4, b^2a(b^2), b^2a(b^4)}
        
        {b, b^2, b^3, b^4, b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^2a(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, b^2a(b^2)}
        
        {b, b^2, b^3, b^4, b^2a(b^2), b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^2a(b^2), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^2a(b^2)}
        
        {b, b^2, b^3, b^4, b^2a(b^2), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^2a(b^2)}
      - {b, b^2, b^3, b^4, b^3ab} (16 descendants)
        
        {b, b^2, b^3, b^4, b^4a, b^3ab}
        
        {b, b^2, b^3, b^4, b^5, b^3ab}
        
        {b, b^2, b^3, b^4, ba(b^4), b^3ab}
        
        {b, b^2, b^3, b^4, b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, b^4, b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^3ab, b^4ab}
        
        {b, b^2, b^3, b^4, b^6, b^3ab}
        
        {b, b^2, b^3, b^4, b^2a(b^4), b^3ab}
        
        {b, b^2, b^3, b^4, b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^3ab, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, b^3ab}
        
        {b, b^2, b^3, b^4, b^3ab, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^3ab, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^3ab}
        
        {b, b^2, b^3, b^4, b^3ab, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^3ab}
      - {b, b^2, b^3, b^4, b^4a} (21 descendants)
        
        {b, b^2, b^3, b^4, b^5, b^4a}
        
        {b, b^2, b^3, b^4, b^4a, ba(b^4)}
        
        {b, b^2, b^3, b^4, b^4a, b^2a(b^3)}
        
        {b, b^2, b^3, b^4, b^4a, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^4a, b^4(a^2)}
        
        {b, b^2, b^3, b^4, b^4a, b^4ab}
        
        {b, b^2, b^3, b^4, b^6, b^4a}
        
        {b, b^2, b^3, b^4, b^4a, b^2a(b^4)}
        
        {b, b^2, b^3, b^4, b^4a, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^4a, b^4(a^2)b}
        
        {b, b^2, b^3, b^4, b^4a, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, b^4a}
        
        {b, b^2, b^3, b^4, b^4a, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^4a, b^4(a^2)(b^2)}
        
        {b, b^2, b^3, b^4, b^4a, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^4a}
        
        {b, b^2, b^3, b^4, b^4a, b^4(a^2)(b^3)}
        
        {b, b^2, b^3, b^4, b^4a, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^4a}
        
        {b, b^2, b^3, b^4, b^4a, b^4(a^2)(b^4)}
        
        {b, b^2, b^3, b^4, b^4a, b^4a(b^5)}
      - {b, b^2, b^3, b^4, b^5} (27 descendants)
        
        {b, b^2, b^3, b^4, b^5, a(b^5)}
        
        {b, b^2, b^3, b^4, b^5, ba(b^4)}
        
        {b, b^2, b^3, b^4, b^5, b^2a(b^3)}
        
        {b, b^2, b^3, b^4, b^5, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^5, b^4ab}
        
        {b, b^2, b^3, b^4, b^5, b^5a}
        
        {b, b^2, b^3, b^4, b^5, b^6}
        
        {b, b^2, b^3, b^4, b^5, ba(b^5)}
        
        {b, b^2, b^3, b^4, b^5, b^2a(b^4)}
        
        {b, b^2, b^3, b^4, b^5, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^5, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^5, b^5ab}
        
        {b, b^2, b^3, b^4, b^5, b^7}
        
        {b, b^2, b^3, b^4, b^5, b^2a(b^5)}
        
        {b, b^2, b^3, b^4, b^5, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^5, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^5, b^5a(b^2)}
        
        {b, b^2, b^3, b^4, b^5, b^8}
        
        {b, b^2, b^3, b^4, b^5, b^3a(b^5)}
        
        {b, b^2, b^3, b^4, b^5, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^5, b^5a(b^3)}
        
        {b, b^2, b^3, b^4, b^5, b^9}
        
        {b, b^2, b^3, b^4, b^5, b^4a(b^5)}
        
        {b, b^2, b^3, b^4, b^5, b^5a(b^4)}
        
        {b, b^2, b^3, b^4, b^5, b^10}
        
        {b, b^2, b^3, b^4, b^5, b^5a(b^5)}
        
        {b, b^2, b^3, b^4, b^5, b^11}
      - {b, b^2, b^3, b^4, ba(b^4)} (13 descendants)
        
        {b, b^2, b^3, b^4, ba(b^4), b^2a(b^3)}
        
        {b, b^2, b^3, b^4, ba(b^4), b^3a(b^2)}
        
        {b, b^2, b^3, b^4, ba(b^4), b^4ab}
        
        {b, b^2, b^3, b^4, b^6, ba(b^4)}
        
        {b, b^2, b^3, b^4, ba(b^4), b^2a(b^4)}
        
        {b, b^2, b^3, b^4, ba(b^4), b^3a(b^3)}
        
        {b, b^2, b^3, b^4, ba(b^4), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, ba(b^4)}
        
        {b, b^2, b^3, b^4, ba(b^4), b^3a(b^4)}
        
        {b, b^2, b^3, b^4, ba(b^4), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, ba(b^4)}
        
        {b, b^2, b^3, b^4, ba(b^4), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, ba(b^4)}
      - {b, b^2, b^3, b^4, b^2a(b^3)} (12 descendants)
        
        {b, b^2, b^3, b^4, b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^2a(b^3), b^4ab}
        
        {b, b^2, b^3, b^4, b^6, b^2a(b^3)}
        
        {b, b^2, b^3, b^4, b^2a(b^3), b^2a(b^4)}
        
        {b, b^2, b^3, b^4, b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^2a(b^3), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, b^2a(b^3)}
        
        {b, b^2, b^3, b^4, b^2a(b^3), b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^2a(b^3), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^2a(b^3)}
        
        {b, b^2, b^3, b^4, b^2a(b^3), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^2a(b^3)}
      - {b, b^2, b^3, b^4, b^3a(b^2)} (11 descendants)
        
        {b, b^2, b^3, b^4, b^3a(b^2), b^4ab}
        
        {b, b^2, b^3, b^4, b^6, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^2a(b^4), b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^3a(b^2), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^3a(b^2), b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^3a(b^2), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^3a(b^2)}
        
        {b, b^2, b^3, b^4, b^3a(b^2), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^3a(b^2)}
      - {b, b^2, b^3, b^4, b^4ab} (10 descendants)
        
        {b, b^2, b^3, b^4, b^6, b^4ab}
        
        {b, b^2, b^3, b^4, b^2a(b^4), b^4ab}
        
        {b, b^2, b^3, b^4, b^3a(b^3), b^4ab}
        
        {b, b^2, b^3, b^4, b^4ab, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, b^4ab}
        
        {b, b^2, b^3, b^4, b^3a(b^4), b^4ab}
        
        {b, b^2, b^3, b^4, b^4ab, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^4ab}
        
        {b, b^2, b^3, b^4, b^4ab, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^4ab}
      - {b, b^2, b^3, b^4, b^6} (10 descendants)
        
        {b, b^2, b^3, b^4, b^6, b^2a(b^4)}
        
        {b, b^2, b^3, b^4, b^6, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^6, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^6, b^7}
        
        {b, b^2, b^3, b^4, b^6, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^6, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^6, b^8}
        
        {b, b^2, b^3, b^4, b^6, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^6, b^9}
        
        {b, b^2, b^3, b^4, b^6, b^11}
      - {b, b^2, b^3, b^4, b^2a(b^4)} (8 descendants)
        
        {b, b^2, b^3, b^4, b^2a(b^4), b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^2a(b^4), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, b^2a(b^4)}
        
        {b, b^2, b^3, b^4, b^2a(b^4), b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^2a(b^4), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^2a(b^4)}
        
        {b, b^2, b^3, b^4, b^2a(b^4), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^2a(b^4)}
      - {b, b^2, b^3, b^4, b^3a(b^3)} (7 descendants)
        
        {b, b^2, b^3, b^4, b^3a(b^3), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^7, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^3a(b^3), b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^3a(b^3), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^3a(b^3)}
        
        {b, b^2, b^3, b^4, b^3a(b^3), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^3a(b^3)}
      - {b, b^2, b^3, b^4, b^4a(b^2)} (6 descendants)
        
        {b, b^2, b^3, b^4, b^7, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^3a(b^4), b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^4a(b^2), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^4a(b^2)}
        
        {b, b^2, b^3, b^4, b^4a(b^2), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^4a(b^2)}
      - {b, b^2, b^3, b^4, b^7} (5 descendants)
        
        {b, b^2, b^3, b^4, b^7, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^7, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^7, b^8}
        
        {b, b^2, b^3, b^4, b^7, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^7, b^9}
      - {b, b^2, b^3, b^4, b^3a(b^4)} (4 descendants)
        
        {b, b^2, b^3, b^4, b^3a(b^4), b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^8, b^3a(b^4)}
        
        {b, b^2, b^3, b^4, b^3a(b^4), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^3a(b^4)}
      - {b, b^2, b^3, b^4, b^4a(b^3)} (3 descendants)
        
        {b, b^2, b^3, b^4, b^8, b^4a(b^3)}
        
        {b, b^2, b^3, b^4, b^4a(b^3), b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^9, b^4a(b^3)}
      - {b, b^2, b^3, b^4, b^8} (2 descendants)
        
        {b, b^2, b^3, b^4, b^8, b^4a(b^4)}
        
        {b, b^2, b^3, b^4, b^8, b^9}
      - {b, b^2, b^3, b^4, b^4a(b^4)} (1 descendant)
        
        {b, b^2, b^3, b^4, b^9, b^4a(b^4)}
      - {b, b^2, b^3, b^4, b^9} (0 descendants)
    - {b, b^2, b^3, ba(b^3)} (8 descendants)
      - {b, b^2, b^3, ba(b^3), b^2a(b^2)} (7 descendants)
        
        {b, b^2, b^3, ba(b^3), b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^5, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, ba(b^3), b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, ba(b^3), b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba(b^3), b^2a(b^2)}
        
        {b, b^2, b^3, ba(b^3), b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba(b^3), b^2a(b^2)}
      - {b, b^2, b^3, ba(b^3), b^3ab} (7 descendants)
        
        {b, b^2, b^3, b^5, ba(b^3), b^3ab}
        
        {b, b^2, b^3, ba(b^3), b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, ba(b^3), b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba(b^3), b^3ab}
        
        {b, b^2, b^3, ba(b^3), b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba(b^3), b^3ab}
        
        {b, b^2, b^3, ba(b^3), b^3ab, b^3aba(b^3)}
      - {b, b^2, b^3, b^5, ba(b^3)} (7 descendants)
        
        {b, b^2, b^3, b^5, ba(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, b^5, ba(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^6, ba(b^3)}
        
        {b, b^2, b^3, b^5, ba(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, ba(b^3)}
        
        {b, b^2, b^3, b^5, ba(b^3), b^5a(b^3)}
        
        {b, b^2, b^3, b^5, b^9, ba(b^3)}
      - {b, b^2, b^3, ba(b^3), b^2a(b^3)} (4 descendants)
        
        {b, b^2, b^3, ba(b^3), b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, ba(b^3), b^2a(b^3)}
        
        {b, b^2, b^3, ba(b^3), b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba(b^3), b^2a(b^3)}
      - {b, b^2, b^3, ba(b^3), b^3a(b^2)} (3 descendants)
        
        {b, b^2, b^3, b^6, ba(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, ba(b^3), b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, ba(b^3), b^3a(b^2)}
      - {b, b^2, b^3, b^6, ba(b^3)} (2 descendants)
        
        {b, b^2, b^3, b^6, ba(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, ba(b^3)}
      - {b, b^2, b^3, ba(b^3), b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^7, ba(b^3), b^3a(b^3)}
      - {b, b^2, b^3, b^7, ba(b^3)} (0 descendants)
    - {b, b^2, b^3, b^2a(b^2)} (7 descendants)
      - {b, b^2, b^3, b^2a(b^2), b^3ab} (6 descendants)
        
        {b, b^2, b^3, b^5, b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^2a(b^2), b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, b^2a(b^2), b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a(b^2), b^3ab}
        
        {b, b^2, b^3, b^2a(b^2), b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a(b^2), b^3ab}
      - {b, b^2, b^3, b^5, b^2a(b^2)} (6 descendants)
        
        {b, b^2, b^3, b^5, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^5, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^6, b^2a(b^2)}
        
        {b, b^2, b^3, b^5, b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, b^2a(b^2)}
        
        {b, b^2, b^3, b^5, b^9, b^2a(b^2)}
      - {b, b^2, b^3, b^2a(b^2), b^2a(b^3)} (4 descendants)
        
        {b, b^2, b^3, b^2a(b^2), b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a(b^2), b^2a(b^3)}
        
        {b, b^2, b^3, b^2a(b^2), b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a(b^2), b^2a(b^3)}
      - {b, b^2, b^3, b^2a(b^2), b^3a(b^2)} (3 descendants)
        
        {b, b^2, b^3, b^6, b^2a(b^2), b^3a(b^2)}
        
        {b, b^2, b^3, b^2a(b^2), b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a(b^2), b^3a(b^2)}
      - {b, b^2, b^3, b^6, b^2a(b^2)} (2 descendants)
        
        {b, b^2, b^3, b^6, b^2a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, b^2a(b^2)}
      - {b, b^2, b^3, b^2a(b^2), b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^7, b^2a(b^2), b^3a(b^3)}
      - {b, b^2, b^3, b^7, b^2a(b^2)} (0 descendants)
    - {b, b^2, b^3, b^3ab} (6 descendants)
      - {b, b^2, b^3, b^5, b^3ab} (7 descendants)
        
        {b, b^2, b^3, b^5, b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, b^5, b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^6, b^3ab}
        
        {b, b^2, b^3, b^5, b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, b^3ab}
        
        {b, b^2, b^3, b^5, b^3ab, b^3a(b^5)}
        
        {b, b^2, b^3, b^5, b^9, b^3ab}
      - {b, b^2, b^3, b^2a(b^3), b^3ab} (4 descendants)
        
        {b, b^2, b^3, b^2a(b^3), b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^6, b^2a(b^3), b^3ab}
        
        {b, b^2, b^3, b^2a(b^3), b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a(b^3), b^3ab}
      - {b, b^2, b^3, b^3ab, b^3a(b^2)} (3 descendants)
        
        {b, b^2, b^3, b^6, b^3ab, b^3a(b^2)}
        
        {b, b^2, b^3, b^3ab, b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^3ab, b^3a(b^2)}
      - {b, b^2, b^3, b^6, b^3ab} (2 descendants)
        
        {b, b^2, b^3, b^6, b^3ab, b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, b^3ab}
      - {b, b^2, b^3, b^3ab, b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^7, b^3ab, b^3a(b^3)}
      - {b, b^2, b^3, b^7, b^3ab} (0 descendants)
    - {b, b^2, b^3, b^5} (6 descendants)
      - {b, b^2, b^3, b^5, b^2a(b^3)} (5 descendants)
        
        {b, b^2, b^3, b^5, b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^6, b^2a(b^3)}
        
        {b, b^2, b^3, b^5, b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, b^2a(b^3)}
        
        {b, b^2, b^3, b^5, b^9, b^2a(b^3)}
      - {b, b^2, b^3, b^5, b^3a(b^2)} (4 descendants)
        
        {b, b^2, b^3, b^5, b^6, b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^7, b^3a(b^2)}
        
        {b, b^2, b^3, b^5, b^9, b^3a(b^2)}
      - {b, b^2, b^3, b^5, b^6} (4 descendants)
        
        {b, b^2, b^3, b^5, b^6, b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^6, b^7}
        
        {b, b^2, b^3, b^5, b^6, b^9}
        
        {b, b^2, b^3, b^5, b^6, b^10}
      - {b, b^2, b^3, b^5, b^3a(b^3)} (2 descendants)
        
        {b, b^2, b^3, b^5, b^7, b^3a(b^3)}
        
        {b, b^2, b^3, b^5, b^9, b^3a(b^3)}
      - {b, b^2, b^3, b^5, b^7} (2 descendants)
        
        {b, b^2, b^3, b^5, b^7, b^9}
        
        {b, b^2, b^3, b^5, b^7, b^11}
      - {b, b^2, b^3, b^5, b^9} (0 descendants)
    - {b, b^2, b^3, b^2a(b^3)} (4 descendants)
      - {b, b^2, b^3, b^2a(b^3), b^3a(b^2)} (3 descendants)
        
        {b, b^2, b^3, b^6, b^2a(b^3), b^3a(b^2)}
        
        {b, b^2, b^3, b^2a(b^3), b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^7, b^2a(b^3), b^3a(b^2)}
      - {b, b^2, b^3, b^6, b^2a(b^3)} (2 descendants)
        
        {b, b^2, b^3, b^6, b^2a(b^3), b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, b^2a(b^3)}
      - {b, b^2, b^3, b^2a(b^3), b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^7, b^2a(b^3), b^3a(b^3)}
      - {b, b^2, b^3, b^7, b^2a(b^3)} (0 descendants)
    - {b, b^2, b^3, b^3a(b^2)} (3 descendants)
      - {b, b^2, b^3, b^6, b^3a(b^2)} (2 descendants)
        
        {b, b^2, b^3, b^6, b^3a(b^2), b^3a(b^3)}
        
        {b, b^2, b^3, b^6, b^7, b^3a(b^2)}
      - {b, b^2, b^3, b^3a(b^2), b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^7, b^3a(b^2), b^3a(b^3)}
      - {b, b^2, b^3, b^7, b^3a(b^2)} (0 descendants)
    - {b, b^2, b^3, b^6} (2 descendants)
      - {b, b^2, b^3, b^6, b^3a(b^3)} (1 descendant)
        
        {b, b^2, b^3, b^6, b^7, b^3a(b^3)}
      - {b, b^2, b^3, b^6, b^7} (1 descendant)
        
        {b, b^2, b^3, b^6, b^7, b^11}
    - {b, b^2, b^3, b^3a(b^3)} (1 descendant)
      - {b, b^2, b^3, b^7, b^3a(b^3)} (0 descendants)
    - {b, b^2, b^3, b^7} (0 descendants)
  - {b, b^2, ba(b^2)} (4 descendants)
    - {b, b^2, ba(b^2), b^2ab} (4 descendants)
      - {b, b^2, b^4, ba(b^2), b^2ab} (6 descendants)
        
        {b, b^2, b^4, ba(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, b^4, b^5, ba(b^2), b^2ab}
        
        {b, b^2, b^4, ba(b^2), b^2ab, b^2aba(b^2)}
        
        {b, b^2, b^4, ba(b^2), b^2ab, b^2a(b^4)}
        
        {b, b^2, b^4, ba(b^2), b^2ab, b^4a(b^2)}
        
        {b, b^2, b^4, b^7, ba(b^2), b^2ab}
      - {b, b^2, ba(b^2), b^2ab, b^2a(b^2)} (5 descendants)
        
        {b, b^2, b^5, ba(b^2), b^2ab, b^2a(b^2)}
        
        {b, b^2, ba(b^2), b^2ab, b^2a(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, ba(b^2), b^2ab, b^2a(b^2), b^2aba(b^2)}
        
        {b, b^2, ba(b^2), b^2ab, b^2a(b^2), b^2a(b^2)ab}
        
        {b, b^2, ba(b^2), b^2ab, b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, b^5, ba(b^2), b^2ab} (1 descendant)
        
        {b, b^2, b^5, ba(b^2), b^2ab, b^2aba(b^2)}
      - {b, b^2, ba(b^2), b^2ab, b^2aba(b^2)} (0 descendants)
    - {b, b^2, b^4, ba(b^2)} (4 descendants)
      - {b, b^2, b^4, ba(b^2), b^2a(b^2)} (5 descendants)
        
        {b, b^2, b^4, b^5, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, ba(b^2), b^2a(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, b^4, ba(b^2), b^2a(b^2), b^4a(b^2)}
        
        {b, b^2, b^4, b^7, ba(b^2), b^2a(b^2)}
        
        {b, b^2, b^4, ba(b^2), b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, b^4, b^5, ba(b^2)} (4 descendants)
        
        {b, b^2, b^4, b^5, ba(b^2), ba(b^5)}
        
        {b, b^2, b^4, b^5, ba(b^2), b^4a(b^2)}
        
        {b, b^2, b^4, b^5, b^7, ba(b^2)}
        
        {b, b^2, b^4, b^5, b^8, ba(b^2)}
      - {b, b^2, b^4, ba(b^2), b^4a(b^2)} (1 descendant)
        
        {b, b^2, b^4, b^7, ba(b^2), b^4a(b^2)}
      - {b, b^2, b^4, b^7, ba(b^2)} (0 descendants)
    - {b, b^2, ba(b^2), b^2a(b^2)} (3 descendants)
      - {b, b^2, b^5, ba(b^2), b^2a(b^2)} (3 descendants)
        
        {b, b^2, b^5, ba(b^2), b^2a(b^2), ba(b^2)a(b^2)}
        
        {b, b^2, b^5, ba(b^2), b^2a(b^2), b^2a(b^2)a(b^2)}
        
        {b, b^2, b^5, ba(b^2), b^2a(b^2), b^5a(b^2)}
      - {b, b^2, ba(b^2), b^2a(b^2), ba(b^2)a(b^2)} (1 descendant)
        
        {b, b^2, ba(b^2), b^2a(b^2), ba(b^2)a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, ba(b^2), b^2a(b^2), b^2a(b^2)a(b^2)} (0 descendants)
    - {b, b^2, b^5, ba(b^2)} (0 descendants)
  - {b, b^2, b^2ab} (3 descendants)
    - {b, b^2, b^4, b^2ab} (4 descendants)
      - {b, b^2, b^4, b^2ab, b^2a(b^2)} (5 descendants)
        
        {b, b^2, b^4, b^5, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^4, b^2ab, b^2a(b^2), b^2a(b^2)ab}
        
        {b, b^2, b^4, b^2ab, b^2a(b^2), b^2a(b^4)}
        
        {b, b^2, b^4, b^7, b^2ab, b^2a(b^2)}
        
        {b, b^2, b^4, b^2ab, b^2a(b^2), b^2a(b^2)a(b^2)}
      - {b, b^2, b^4, b^5, b^2ab} (4 descendants)
        
        {b, b^2, b^4, b^5, b^2ab, b^2a(b^4)}
        
        {b, b^2, b^4, b^5, b^2ab, b^5ab}
        
        {b, b^2, b^4, b^5, b^7, b^2ab}
        
        {b, b^2, b^4, b^5, b^8, b^2ab}
      - {b, b^2, b^4, b^2ab, b^2a(b^4)} (1 descendant)
        
        {b, b^2, b^4, b^7, b^2ab, b^2a(b^4)}
      - {b, b^2, b^4, b^7, b^2ab} (0 descendants)
    - {b, b^2, b^2ab, b^2a(b^2)} (3 descendants)
      - {b, b^2, b^5, b^2ab, b^2a(b^2)} (3 descendants)
        
        {b, b^2, b^5, b^2ab, b^2a(b^2), b^2a(b^2)ab}
        
        {b, b^2, b^5, b^2ab, b^2a(b^2), b^2a(b^2)a(b^2)}
        
        {b, b^2, b^5, b^2ab, b^2a(b^2), b^2a(b^5)}
      - {b, b^2, b^2ab, b^2a(b^2), b^2a(b^2)ab} (1 descendant)
        
        {b, b^2, b^2ab, b^2a(b^2), b^2a(b^2)ab, b^2a(b^2)a(b^2)}
      - {b, b^2, b^2ab, b^2a(b^2), b^2a(b^2)a(b^2)} (0 descendants)
    - {b, b^2, b^5, b^2ab} (0 descendants)
  - {b, b^2, b^4} (3 descendants)
    - {b, b^2, b^4, b^2a(b^2)} (2 descendants)
      - {b, b^2, b^4, b^5, b^2a(b^2)} (4 descendants)
        
        {b, b^2, b^4, b^5, b^7, b^2a(b^2)}
        
        {b, b^2, b^4, b^5, b^2a(b^2), b^2a(b^5)}
        
        {b, b^2, b^4, b^5, b^2a(b^2), b^5a(b^2)}
        
        {b, b^2, b^4, b^5, b^8, b^2a(b^2)}
      - {b, b^2, b^4, b^7, b^2a(b^2)} (0 descendants)
    - {b, b^2, b^4, b^5} (2 descendants)
      - {b, b^2, b^4, b^5, b^7} (2 descendants)
        
        {b, b^2, b^4, b^5, b^7, b^8}
        
        {b, b^2, b^4, b^5, b^7, b^10}
      - {b, b^2, b^4, b^5, b^8} (1 descendant)
        
        {b, b^2, b^4, b^5, b^8, b^11}
    - {b, b^2, b^4, b^7} (0 descendants)
  - {b, b^2, b^2a(b^2)} (1 descendant)
    - {b, b^2, b^5, b^2a(b^2)} (0 descendants)
  - {b, b^2, b^5} (0 descendants)
- {b, bab} (2 descendants)
  - {b, b^3, bab} (4 descendants)
    - {b, b^3, bab, babab} (4 descendants)
      - {b, b^3, bab, ba(b^3), babab} (4 descendants)
        
        {b, b^3, bab, ba(b^3), b^3ab, babab}
        
        {b, b^3, b^5, bab, ba(b^3), babab}
        
        {b, b^3, bab, ba(b^3), babab, bababab}
        
        {b, b^3, bab, ba(b^3), babab, baba(b^3)}
      - {b, b^3, bab, b^3ab, babab} (3 descendants)
        
        {b, b^3, b^5, bab, b^3ab, babab}
        
        {b, b^3, bab, b^3ab, babab, bababab}
        
        {b, b^3, bab, b^3ab, babab, b^3abab}
      - {b, b^3, b^5, bab, babab} (2 descendants)
        
        {b, b^3, b^5, bab, babab, bababab}
        
        {b, b^3, b^5, b^7, bab, babab}
      - {b, b^3, bab, babab, bababab} (1 descendant)
        
        {b, b^3, bab, babab, bababab, babababab}
    - {b, b^3, bab, ba(b^3)} (2 descendants)
      - {b, b^3, bab, ba(b^3), b^3ab} (3 descendants)
        
        {b, b^3, b^5, bab, ba(b^3), b^3ab}
        
        {b, b^3, bab, ba(b^3), b^3ab, ba(b^3)ab}
        
        {b, b^3, bab, ba(b^3), b^3ab, b^3a(b^3)}
      - {b, b^3, b^5, bab, ba(b^3)} (2 descendants)
        
        {b, b^3, b^5, bab, ba(b^3), ba(b^5)}
        
        {b, b^3, b^5, b^7, bab, ba(b^3)}
    - {b, b^3, bab, b^3ab} (1 descendant)
      - {b, b^3, b^5, bab, b^3ab} (2 descendants)
        
        {b, b^3, b^5, bab, b^3ab, b^5ab}
        
        {b, b^3, b^5, b^7, bab, b^3ab}
    - {b, b^3, b^5, bab} (1 descendant)
      - {b, b^3, b^5, b^7, bab} (1 descendant)
        
        {b, b^3, b^5, b^7, b^9, bab}
  - {b, bab, babab} (1 descendant)
    - {b, bab, babab, bababab} (1 descendant)
      - {b, bab, babab, bababab, babababab} (1 descendant)
        
        {b, bab, babab, bababab, babababab, bababababab}
- {b, b^3} (1 descendant)
  - {b, b^3, b^5} (1 descendant)
    - {b, b^3, b^5, b^7} (1 descendant)
      - {b, b^3, b^5, b^7, b^9} (1 descendant)
        
        {b, b^3, b^5, b^7, b^9, b^11}