using System;

using System.Collections.Generic;

​

class A{

    public int x;

    protected int y;

    private int z;

}

​

class B: A{

    private int d;

    protected int e;

    public void Foo(){

        d=2;

        e=2;

        x=2;

        y=2;

    }

​

}

​

public class Program{

    public static void Main(){

        B B= new B();

        B.x=1;

        B.Foo();

​

    }

}