import java.awt.event.*;
import java.awt.*;
public class MyActionListener implements ActionListener
{
	public void actionPerformed(ActionEvent e)
	{
		Button bt=(Button)(e.getSource());
		if(bt.getLabel().equals("exit"))
		{
			System.exit(0);
		}
		else
		{
			bt.setLabel("no");
		}
	}
}