MAYBE
31.80/10.33	MAYBE
31.80/10.33	
31.80/10.33	Problem:
31.80/10.33	 a(x1) -> x1
31.80/10.33	 a(a(x1)) -> b(x1)
31.80/10.33	 b(x1) -> x1
31.80/10.33	 b(c(x1)) -> c(c(b(a(x1))))
31.80/10.33	 c(x1) -> x1
31.80/10.33	
31.80/10.33	Proof:
31.80/10.33	 Open
31.80/10.33	EOF