YES

(VAR x x0 x1 y z)
(RULES
  r(x) -> x
  R(x0) -> x0
  s(x0) -> x0
  T(x0) -> x0
  S(x0) -> x0
  t(x0) -> x0
  i(f(x1,x0)) -> f(i(x0),i(x1))
  i(i(x0)) -> x0
  f(x1,f(i(x1),x0)) -> x0
  f(i(x1),f(x1,x0)) -> x0
  i(e()) -> e()
  f(x,e()) -> x
  f(e(),x) -> x
  f(i(x),x) -> e()
  f(x,i(x)) -> e()
  f(f(x,y),z) -> f(x,f(y,z))
)

(COMMENT
Termination is shown by LPO with precedence:

  i > f > t > T > r > s > R > S > e
)