196.13/50.10 MAYBE 196.13/50.10 196.13/50.10 Problem: 196.13/50.10 a(a(a(a(b(x1))))) -> b(b(a(a(a(a(a(x1))))))) 196.13/50.10 196.13/50.10 Proof: 196.13/50.10 Open 196.13/50.10 EOF