using System;

using System.Collections.Generic;

​

public class FairRandom {

    private int lastNumber = 3;

    private Random rnd = new Random();

    public int Next() {

        if (lastNumber == 6) {

            lastNumber = rnd.Next(1,3);

            return lastNumber;

        }

        else if (lastNumber == 1) {

            lastNumber = rnd.Next(5,7);

            return lastNumber;

        }

        else {

            lastNumber = rnd.Next(1,7); 

            return lastNumber;

        }

    }

}

public class Program

{

    public static void Main()

    {

        FairRandom rnd = new FairRandom();

        for (int i=0;i<100;i++)

            Console.WriteLine(rnd.Next());

    }

}