public class Q3
{
    public static void tryToSwap(PhoneNumber a, PhoneNumber b)
    {
	PhoneNumber    temp;

	temp = new PhoneNumber(a.areaCode, a.exchange, a.extension);

	a.areaCode  = b.areaCode;
	a.exchange  = b.exchange;
	a.extension = b.extension;

	b.areaCode  = temp.areaCode;
	b.exchange  = temp.exchange;
	b.extension = temp.extension;
    }



    public static void main(String[] args)
    {
	PhoneNumber          ahPhone, dbPhone, nhPhone;

	ahPhone = new PhoneNumber(540,568,2774);
	dbPhone = new PhoneNumber(540,568,1671);
	nhPhone = new PhoneNumber(540,568,8771);

	tryToSwap(ahPhone, dbPhone);
    }
}