YES
O(n^2)
TRS:
 {h(x, x) -> x,
  f(x, y) -> h(x, y),
  f(x, y) -> h(y, x)}
 Natural interpretation:
  Strict:
   {h(x, x) -> x,
    f(x, y) -> h(x, y),
    f(x, y) -> h(y, x)}
  Weak:
   {}
  Interpretation class: deltarestricted
  [f](delta, X1, X0) = + 1*X0 + 1*X1 + 0 + 0*X0*delta + 0*X1*delta + 2*delta
  [h](delta, X1, X0) = + 1*X0 + 1*X1 + 0 + 0*X0*delta + 0*X1*delta + 1*delta
  f_tau_1(delta) = delta/(1 + 0 * delta)f_tau_2(delta) = delta/(1 + 0 * delta)
  h_tau_1(delta) = delta/(1 + 0 * delta)h_tau_2(delta) = delta/(1 + 0 * delta)
  
  Qed