YES
O(n^2)
TRS:
 {
     d(x) -> e(u(x)),
  d(u(x)) -> c(x),
  c(u(x)) -> b(x),
  b(u(x)) -> a(e(x)),
  v(e(x)) -> x
 }
 Natural interpretation:
  Strict:
   {
       d(x) -> e(u(x)),
    d(u(x)) -> c(x),
    c(u(x)) -> b(x),
    b(u(x)) -> a(e(x)),
    v(e(x)) -> x
   }
  Weak:
   {}
  Interpretation class: deltarestricted
  [a](delta, X0) = + 0*X0 + 0 + 1*X0*delta + 0*delta
  [v](delta, X0) = + 1*X0 + 0 + 0*X0*delta + 1*delta
  [b](delta, X0) = + 0*X0 + 0 + 1*X0*delta + 0*delta
  [c](delta, X0) = + 0*X0 + 0 + 1*X0*delta + 0*delta
  [d](delta, X0) = + 0*X0 + 1 + 1*X0*delta + 1*delta
  [u](delta, X0) = + 0*X0 + 1 + 1*X0*delta + 0*delta
  [e](delta, X0) = + 1*X0 + 0 + 0*X0*delta + 0*delta
  a_tau_1(delta) = delta/(0 + 1 * delta)
  v_tau_1(delta) = delta/(1 + 0 * delta)
  b_tau_1(delta) = delta/(0 + 1 * delta)
  c_tau_1(delta) = delta/(0 + 1 * delta)
  d_tau_1(delta) = delta/(0 + 1 * delta)
  u_tau_1(delta) = delta/(0 + 1 * delta)
  e_tau_1(delta) = delta/(1 + 0 * delta)
  
  Qed