MAYBE 41.11/11.27 MAYBE 41.11/11.27 41.11/11.27 Problem: 41.11/11.27 a(b(x1)) -> x1 41.11/11.27 b(c(x1)) -> a(a(x1)) 41.11/11.27 c(a(x1)) -> b(b(c(c(x1)))) 41.11/11.27 41.11/11.27 Proof: 41.11/11.27 Open 41.11/11.27 EOF