MAYBE 210.43/57.08 MAYBE 210.43/57.08 210.43/57.08 Problem: 210.43/57.08 b(b(x1)) -> b(a(b(x1))) 210.43/57.08 b(b(a(b(x1)))) -> b(a(b(a(a(b(b(x1))))))) 210.43/57.08 b(a(b(x1))) -> b(a(a(b(x1)))) 210.43/57.08 b(a(a(b(a(b(x1)))))) -> b(b(x1)) 210.43/57.08 210.43/57.08 Proof: 210.43/57.08 Open 210.43/57.08 EOF