/** A class to represent at Dog.
 */
public class Dog  {
  String name;
  String sound;

  /** Constructor.
   * @param _name the name of the animal.
   * @param _sound what sound the animal makes.   
   */
  Dog( String _name, String _sound ) {
    this.name = _name;
    this.sound = _sound;
    }
    
    
   /** When the animal wants to bug a human, it says...
   * @return The sound of the animal, bugging its owner.
   */
  public String speak() {
    return this.sound + ", " + this.sound + ".";
    }


}