196.33/50.20	MAYBE
196.33/50.20	
196.33/50.20	Problem:
196.33/50.20	 a(x1) -> x1
196.33/50.20	 a(b(x1)) -> c(a(a(x1)))
196.33/50.20	 c(c(x1)) -> b(c(b(a(x1))))
196.33/50.20	
196.33/50.20	Proof:
196.33/50.20	 Open
196.33/50.21	EOF