MAYBE
91.47/55.32	MAYBE
91.47/55.32	
91.47/55.32	Problem:
91.47/55.32	 a(x1) -> b(b(x1))
91.47/55.32	 b(b(c(x1))) -> c(b(c(a(x1))))
91.47/55.32	 c(c(x1)) -> x1
91.47/55.32	
91.47/55.32	Proof:
91.47/55.32	 Open
91.47/55.32	EOF