MAYBE
44.63/13.02	MAYBE
44.63/13.02	
44.63/13.02	Problem:
44.63/13.02	 a(x1) -> b(c(x1))
44.63/13.02	 a(b(x1)) -> x1
44.63/13.02	 a(b(b(x1))) -> b(b(a(a(x1))))
44.63/13.02	
44.63/13.02	Proof:
44.63/13.02	 Open
44.63/13.02	EOF