YES TRS: g(x,y) -> x g(x,y) -> y f(s(x),y,y) -> f(y,x,s(x)) linear polynomial interpretations on N: g_A(x1,x2) = x1 + x2 g#_A(x1,x2) = x1 + x2 f_A(x1,x2,x3) = x1 + x3 f#_A(x1,x2,x3) = x1 + x2 s_A(x1) = x1 + 1 s#_A(x1) = 0 precedence: f > g = s