MAYBE
0.08/0.18	MAYBE
0.08/0.18	
0.08/0.18	Problem:
0.08/0.18	 lt(0(),s(x)) -> true()
0.08/0.18	 lt(x,0()) -> false()
0.08/0.18	 lt(s(x),s(y)) -> lt(x,y)
0.08/0.18	 minus(x,y) -> help(lt(y,x),x,y)
0.08/0.18	 help(true(),x,y) -> s(minus(x,s(y)))
0.08/0.18	 help(false(),x,y) -> 0()
0.08/0.18	
0.08/0.18	Proof:
0.08/0.18	 Open
0.08/0.18	EOF