public ThreeSubscriber(KeyboardManager manager)
 {
     manager.Button3Pressed += PrintNum;
 }
 public DigiSubscriber(KeyboardManager manager)
 {
     manager.ButtonNumberPressed += Print;
 }
 public LogSubscriber(KeyboardManager manager)
 {
     manager.KeyPressed += Print;
 }
 public FiveSubscriber(KeyboardManager manager)
 {
     manager.Button5Pressed += PrintNum;
 }