MAYBE
0.08/0.19	MAYBE
0.08/0.19	
0.08/0.19	Problem:
0.08/0.19	 f(x,0(),0()) -> s(x)
0.08/0.19	 f(0(),y,0()) -> s(y)
0.08/0.19	 f(0(),0(),z) -> s(z)
0.08/0.19	 f(s(0()),y,z) -> f(0(),s(y),s(z))
0.08/0.19	 f(s(x),s(y),0()) -> f(x,y,s(0()))
0.08/0.19	 f(s(x),0(),s(z)) -> f(x,s(0()),z)
0.08/0.19	 f(0(),s(0()),s(0())) -> s(s(0()))
0.08/0.19	 f(s(x),s(y),s(z)) -> f(x,y,f(s(x),s(y),z))
0.08/0.19	 f(0(),s(s(y)),s(0())) -> f(0(),y,s(0()))
0.08/0.19	 f(0(),s(0()),s(s(z))) -> f(0(),s(0()),z)
0.08/0.19	 f(0(),s(s(y)),s(s(z))) -> f(0(),y,f(0(),s(s(y)),s(z)))
0.08/0.19	
0.08/0.19	Proof:
0.08/0.19	 Open
0.08/0.19	EOF