YES
O(n^2)
TRS:
 {w(r(x)) -> r(w(x)),
  b(r(x)) -> r(b(x)),
  b(w(x)) -> w(b(x))}
 Natural interpretation:
  Strict:
   {w(r(x)) -> r(w(x)),
    b(r(x)) -> r(b(x)),
    b(w(x)) -> w(b(x))}
  Weak:
   {}
  Interpretation class: deltarestricted
  [b](delta, X0) = + 1*X0 + 0 + 1*X0*delta + 0*delta
  [w](delta, X0) = + 1*X0 + 1 + 1*X0*delta + 0*delta
  [r](delta, X0) = + 1*X0 + 1 + 0*X0*delta + 0*delta
  b_tau_1(delta) = delta/(1 + 1 * delta)
  w_tau_1(delta) = delta/(1 + 1 * delta)
  r_tau_1(delta) = delta/(1 + 0 * delta)
  
  Qed