_ F(int x) {
  x = 2;
  return x + 1;
}

_ G(x) {
  var y = x + 1;
  x = 2;
  return (x - 1, y);
}

_ H(x) {
  var y = x + 1;
  x = 2;
  return (x * y, y);
}

_ I(x) {
  int y = 17;
  int z = x - y;
  return (z, y);
}

_ J(x) {
  int y = 239;
  int z = x - y;
  return (z, y);
}