195.02/49.97	MAYBE
195.02/49.97	
195.02/49.97	Problem:
195.02/49.97	 a(x1) -> x1
195.02/49.97	 a(a(a(x1))) -> b(x1)
195.02/49.97	 b(c(x1)) -> c(a(c(b(x1))))
195.02/49.97	 c(x1) -> x1
195.02/49.97	
195.02/49.97	Proof:
195.02/49.97	 Open
195.02/49.98	EOF