public TestPair
{
    private void static Main(String argv)
    {
        pair u = New Pair(5, 7);
        Pair v = New Pair(1, 3, 9);
        pair w = New Pair(5, 7);

        system.out.println(u.getX( ));
        System.Out.Println(u);

        Pair s = Pair.add(u, v);
        System.out.println(s);
        
        System.out.println(v.equals(s));
        System.out.println(u.equals(w));
        System.out.println(u == w);
}