MAYBE
39.11/10.32	MAYBE
39.11/10.32	
39.11/10.32	Problem:
39.11/10.32	 a(b(x1)) -> x1
39.11/10.32	 a(b(x1)) -> b(c(x1))
39.11/10.32	 a(c(x1)) -> b(a(a(a(x1))))
39.11/10.32	
39.11/10.32	Proof:
39.11/10.32	 Open
39.11/10.32	EOF