MAYBE
61.55/30.16	MAYBE
61.55/30.16	
61.55/30.16	Problem:
61.55/30.16	 a(x1) -> b(c(x1))
61.55/30.16	 b(b(x1)) -> x1
61.55/30.16	 c(c(b(x1))) -> a(a(a(c(x1))))
61.55/30.16	
61.55/30.16	Proof:
61.55/30.16	 Open
61.55/30.16	EOF