class Dog extends Animal {

  /** A Constructor when given a name and a sound.
   */
  public Dog( String nom, String sound ) {
    super( nom, sound );
    }

  /** The sound *most* dogs make. */
  private static final String DEFAULT_SOUND = "arf";

  /** A constructor given a name only.
   */
  public Dog( String nom ) {
    this( nom, DEFAULT_SOUND );  // Call the two-argument constructor.
    }

    
    
  public String wagTail() {
    return this.name + ": " + "[OhBoyOhBoyOhBoy!]";
    }

  public String speak() {
    return  this.wagTail();
    }

  }