MAYBE
72.71/34.70	MAYBE
72.71/34.70	
72.71/34.70	Problem:
72.71/34.70	 a(x1) -> x1
72.71/34.70	 a(b(x1)) -> b(c(a(x1)))
72.71/34.70	 c(c(a(x1))) -> a(b(a(x1)))
72.71/34.70	
72.71/34.70	Proof:
72.71/34.70	 Open
72.71/34.70	EOF