using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<int> options = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };

        int length = 6;

        int result = 1;

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

        {

            result *= options.Count - i;

        }

        Console.WriteLine(result);

    }

}