MAYBE 30.27/10.18 MAYBE 30.27/10.18 30.27/10.18 Problem: 30.27/10.18 a(x1) -> x1 30.27/10.18 a(b(x1)) -> b(a(c(b(c(x1))))) 30.27/10.18 b(x1) -> a(x1) 30.27/10.18 c(c(x1)) -> x1 30.27/10.18 30.27/10.18 Proof: 30.27/10.18 Open 30.27/10.19 EOF