198.14/50.18	MAYBE
198.14/50.18	
198.14/50.18	Problem:
198.14/50.18	 a(a(x1)) -> a(b(x1))
198.14/50.18	 b(a(c(x1))) -> c(c(a(a(a(x1)))))
198.14/50.18	
198.14/50.18	Proof:
198.14/50.18	 Open
198.26/50.18	EOF