MAYBE 53.32/21.45 MAYBE 53.32/21.45 53.32/21.45 Problem: 53.32/21.45 a(a(x1)) -> a(b(b(c(x1)))) 53.32/21.45 a(b(x1)) -> x1 53.32/21.45 c(b(x1)) -> a(c(x1)) 53.32/21.45 53.32/21.45 Proof: 53.32/21.45 Open 53.32/21.45 EOF