197.35/50.30 MAYBE 197.35/50.30 197.35/50.30 Problem: 197.35/50.30 0(0(0(0(x1)))) -> 0(0(0(1(x1)))) 197.35/50.30 1(0(0(1(x1)))) -> 0(0(1(0(x1)))) 197.35/50.30 197.35/50.30 Proof: 197.35/50.30 Open 197.35/50.31 EOF