class A
{
    public void show()
    {
        System.out.println("A");
    }
}

class B extends A
{
    public void show()
    {
        System.out.println("B");
    }
}

public class mc_q03
{
    public static void main(String[] args)
    {
        A obj = new B();
	obj.show();
    }
}