MAYBE
151.01/55.36	MAYBE
151.01/55.36	
151.01/55.36	Problem:
151.01/55.36	 a(c(x1)) -> a(x1)
151.01/55.36	 a(c(b(c(x1)))) -> c(b(c(c(x1))))
151.01/55.36	 c(x1) -> b(a(a(x1)))
151.01/55.36	
151.01/55.36	Proof:
151.01/55.36	 Open
151.01/55.37	EOF