195.40/49.95	MAYBE
195.40/49.95	
195.40/49.95	Problem:
195.40/49.95	 a(x1) -> x1
195.40/49.95	 a(b(x1)) -> b(c(a(a(x1))))
195.40/49.95	 c(b(x1)) -> x1
195.40/49.95	 c(c(x1)) -> b(x1)
195.40/49.95	
195.40/49.95	Proof:
195.40/49.95	 Open
195.40/49.95	EOF