MAYBE
0.08/0.18	MAYBE
0.08/0.18	
0.08/0.18	Problem:
0.08/0.18	 ge(x,0()) -> true()
0.08/0.18	 ge(0(),s(y)) -> false()
0.08/0.18	 ge(s(x),s(y)) -> ge(x,y)
0.08/0.18	 rev(x) -> if(x,eq(0(),length(x)),nil(),0(),length(x))
0.08/0.18	 if(x,true(),z,c,l) -> z
0.08/0.18	 if(x,false(),z,c,l) -> help(s(c),l,x,z)
0.08/0.18	 help(c,l,cons(x,y),z) -> if(append(y,cons(x,nil())),ge(c,l),cons(x,z),c,l)
0.08/0.18	 append(nil(),y) -> y
0.08/0.18	 append(cons(x,y),z) -> cons(x,append(y,z))
0.08/0.18	 length(nil()) -> 0()
0.08/0.18	 length(cons(x,y)) -> s(length(y))
0.08/0.18	
0.08/0.18	Proof:
0.08/0.18	 Open
0.08/0.19	EOF