fun h (x, y, z) =
  fun f (x) =
      if x =? 0 then z
      else g (x - 1)
      fi
  and g (x) =
      if x =? 0 then y
      else f (x - 1)
      fi;
  g (x)

val main =
    print_int (h (2, 20, 42));
    print_int (h (3, 20, 42))