MAYBE
38.46/11.37	MAYBE
38.46/11.37	
38.46/11.37	Problem:
38.46/11.37	 a(x1) -> x1
38.46/11.37	 a(x1) -> b(b(c(x1)))
38.46/11.37	 a(c(b(x1))) -> c(a(a(x1)))
38.46/11.37	 c(x1) -> x1
38.46/11.37	
38.46/11.37	Proof:
38.46/11.37	 Open
38.46/11.39	EOF