196.02/50.19	MAYBE
196.02/50.19	
196.02/50.19	Problem:
196.02/50.19	 a(x1) -> x1
196.02/50.19	 a(b(x1)) -> b(c(a(x1)))
196.02/50.19	 b(c(c(x1))) -> c(b(a(x1)))
196.02/50.19	
196.02/50.19	Proof:
196.02/50.19	 Open
196.02/50.19	EOF