195.88/50.09	MAYBE
195.88/50.09	
195.88/50.09	Problem:
195.88/50.09	 a(x1) -> x1
195.88/50.09	 a(b(x1)) -> b(c(a(a(a(x1)))))
195.88/50.09	 a(c(c(x1))) -> b(x1)
195.88/50.09	
195.88/50.09	Proof:
195.88/50.09	 Open
195.88/50.09	EOF