using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Random metaRandom = new Random();

        int checksRequired = 0;

        List<byte> requiredMatches = new List<byte>(){ 7, 5, 0, 4 };

        List<byte> limits = new List<byte>(){ 7, 6, 8, 12 };

        List<int> randomInts = new List<int>(){0, 0, 0, 0};

        Random r = null;

        int seed = 0;

        for (int i = 0; i < 100000; i++)

        {

            checksRequired++;

            seed = metaRandom.Next();

            r = new Random(seed);

            for (int j = 0; j < requiredMatches.Count; j++)

            {

                randomInts[j] = r.Next(0, limits[j] + 1);

            }

            bool discrepancy = false;

            for (int j = 0; j < requiredMatches.Count; j++)

            {

                if (randomInts[j] != requiredMatches[j]) 

                { 

                    discrepancy = true;

                    break;

                }

                if (j > 0)

                {

                    //Console.WriteLine(j + 1);

                }

            }

            if (!discrepancy)

            {

                break;

            }

        }

        Console.WriteLine(checksRequired);

    }

}