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