YES

1 decompositions
 #0 -----------
   1: a() -> a'()
   2: h(x,a'(),y) -> h(x,y,y)
   3: h(x,y,a'()) -> h(x,y,y)
   4: g() -> f()
   5: h(f(),a(),a()) -> h(g(),a(),a())
   6: h(g(),a(),a()) -> h(f(),a(),a())

@Parallel Closedness
--- R
   1: a() -> a'()
   2: h(x,a'(),y) -> h(x,y,y)
   3: h(x,y,a'()) -> h(x,y,y)
   4: g() -> f()
   5: h(f(),a(),a()) -> h(g(),a(),a())
   6: h(g(),a(),a()) -> h(f(),a(),a())

--- S
   1: a() -> a'()
   2: h(x,a'(),y) -> h(x,y,y)
   3: h(x,y,a'()) -> h(x,y,y)
   4: g() -> f()
   5: h(f(),a(),a()) -> h(g(),a(),a())
   6: h(g(),a(),a()) -> h(f(),a(),a())