MAYBE
31.71/10.18	MAYBE
31.71/10.18	
31.71/10.18	Problem:
31.71/10.18	 a(x1) -> x1
31.71/10.18	 a(b(x1)) -> a(c(b(b(a(a(x1))))))
31.71/10.18	 b(x1) -> x1
31.71/10.18	 c(c(x1)) -> x1
31.71/10.18	
31.71/10.18	Proof:
31.71/10.18	 Open
31.71/10.19	EOF