MAYBE
0.08/0.18	MAYBE
0.08/0.18	
0.08/0.18	Problem:
0.08/0.18	 -(x,0()) -> x
0.08/0.18	 -(s(x),s(y)) -> -(x,y)
0.08/0.18	 +(0(),y) -> y
0.08/0.18	 +(s(x),y) -> s(+(x,y))
0.08/0.18	 *(x,0()) -> 0()
0.08/0.18	 *(x,s(y)) -> +(x,*(x,y))
0.08/0.18	 f(s(x),y) -> f(-(*(s(x),s(y)),s(*(s(x),y))),*(y,y))
0.08/0.18	
0.08/0.18	Proof:
0.08/0.18	 Open
0.08/0.18	EOF