198.80/50.48	MAYBE
198.80/50.48	
198.80/50.48	Problem:
198.80/50.48	 a(x1) -> b(c(x1))
198.80/50.48	 a(b(b(x1))) -> c(a(a(a(x1))))
198.80/50.48	 c(c(x1)) -> x1
198.80/50.48	
198.80/50.48	Proof:
198.80/50.48	 Open
198.80/50.48	EOF