MAYBE
0.08/0.18	MAYBE
0.08/0.18	
0.08/0.18	Problem:
0.08/0.18	 app(nil(),k) -> k
0.08/0.18	 app(l,nil()) -> l
0.08/0.18	 app(cons(x,l),k) -> cons(x,app(l,k))
0.08/0.18	 sum(cons(x,nil())) -> cons(x,nil())
0.08/0.18	 sum(cons(x,cons(y,l))) -> sum(cons(a(x,y,h()),l))
0.08/0.18	 a(h(),h(),x) -> s(x)
0.08/0.18	 a(x,s(y),h()) -> a(x,y,s(h()))
0.08/0.18	 a(x,s(y),s(z)) -> a(x,y,a(x,s(y),z))
0.08/0.18	 a(s(x),h(),z) -> a(x,z,z)
0.08/0.18	
0.08/0.18	Proof:
0.08/0.18	 Open
0.08/0.19	EOF