import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;

class Program extends Frame {
	Program() {
		addKeyListener(new BillentyuKezeles());
		addWindowListener(new AblakKezeles());
		setSize(400, 300);
		setVisible(true);
	}
	class BillentyuKezeles implements KeyListener {
		public void keyPressed(KeyEvent e) {
			
			switch(e.getKeyCode()) {
				case KeyEvent.VK_A : setTitle("a"); break;
				case KeyEvent.VK_B : setTitle("b"); break;
				case KeyEvent.VK_C : setTitle("c"); break;
				case KeyEvent.VK_1 : setTitle("1"); break;
				case KeyEvent.VK_2 : setTitle("2"); break;				
			}
		}
		public void keyReleased(KeyEvent e) {

		}
		public void keyTyped(KeyEvent e) {

		}
	}

	class AblakKezeles extends WindowAdapter {
		public void windowClosing(WindowEvent e) {
			System.exit(0);
		}
	}

	public static void main(String[] args) {
		new Program();
	}
}