using System;

        public class Human

        {

         public string name;

         public int age;

         public string email;

            public Human() {}

            public Human(string name, int age, string email)

            {this.name=name ;this.age=age;this.email=email;}

            public void PrintInfo()

            {Console.WriteLine("Name{0}\nAge {1}\nE-mail {2}",name,age,email);}

        }

        public class Student:Human

        {

        public string clas;

        public int id;

        public Student(string name,int age,string email,string clas,int id):base(name,age,email)

        {this.clas=clas;this.id=id;}

        public void PrintInfo()

            {Console.WriteLine("Name{0}\nAge {1}\nE-mail {2}\nClass {3}\nID {4}",name,age,email,clas,id);}

        }       

     public class A

     {public int x=100;

      protected int y=200;

      private int z=300;

     }

public class Program:A

{

    public static void Main()

    { A a=new A();

    a.x=10;

    a.y=20;

    a.z=30;

     Program b=new Program();

     b.x=10;

     b.y=20;

     b.z=30;

    Student newStud=new Student("Nikola",17,"NIkolov@gmail.com","11B",1); 

        newStud.PrintInfo();

    }

}