YES

1 decompositions
 #0 -----------
   1: f(g(x)) -> h(g(x),g(x))
   2: f(s(x)) -> h(s(x),s(x))
   3: g(x) -> s(x)

@Parallel Closedness
--- R
   1: f(g(x)) -> h(g(x),g(x))
   2: f(s(x)) -> h(s(x),s(x))
   3: g(x) -> s(x)

--- S
   1: f(g(x)) -> h(g(x),g(x))
   2: f(s(x)) -> h(s(x),s(x))
   3: g(x) -> s(x)