MAYBE
0.08/0.17	MAYBE
0.08/0.17	
0.08/0.17	Problem:
0.08/0.17	 p(s(x)) -> x
0.08/0.17	 fac(0()) -> s(0())
0.08/0.17	 fac(s(x)) -> times(s(x),fac(p(s(x))))
0.08/0.17	
0.08/0.17	Proof:
0.08/0.17	 Open
0.08/0.18	EOF