MAYBE
0.09/0.17	MAYBE
0.09/0.17	
0.09/0.17	Problem:
0.09/0.17	 -(x,0()) -> x
0.09/0.17	 -(s(x),s(y)) -> -(x,y)
0.09/0.17	 +(0(),y) -> y
0.09/0.17	 +(s(x),y) -> s(+(x,y))
0.09/0.17	 *(x,0()) -> 0()
0.09/0.17	 *(x,s(y)) -> +(x,*(x,y))
0.09/0.17	 p(s(x)) -> x
0.09/0.17	 f(s(x)) -> f(-(p(*(s(x),s(x))),*(s(x),s(x))))
0.09/0.17	
0.09/0.17	Proof:
0.09/0.17	 Open
0.09/0.17	EOF