interface Animal { public void noise(); };
class Dog implements Animal {
  public void noise() { System.out.println("Ruff Ruff"); }
};
class Tiger implements Animal {
  public void noise() { System.out.println("Glug Glug"); }
};
class Main {
  public static void main(String[] args) {
    Animal pappy = new Dog(); pappy.noise();
    Animal tora = new Tiger(); tora.noise();
  }
}
/* end */