using System;

public class Program

{

    public static void Main()

    {

        int br=0;

for(int first=1;first<16;first++)

{

    for(int second=first+1;second<17;second++)

    {

        for(int third=second+1;third<18;third++)

        {

            for(int fourth=third+1;fourth<19;fourth++)

            {

                for(int fifth=fourth+1;fifth<20;fifth++)

                {

                    for(int sixth=fifth+1;sixth<21;sixth++)

                    {       

                    Console.WriteLine("{0}, {1}, {2}, {3}, {4} , {5}", first, second, third, fourth, fifth , sixth);

                    br++;

                }

            }

        }

    }

}

​

}

        Console.WriteLine("Broqt na vsichki kombinacii v toto 6/20 e {0}" ,br);

    }

}

​

​