using System;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    public static void Main()

    {

        var orderId = 352547274;

        var md5Hasher = MD5.Create();

        var hash = md5Hasher.ComputeHash(Encoding.UTF8.GetBytes(orderId.ToString()));

        var longCode = Math.Abs(BitConverter.ToInt32(hash, 0)).ToString();

        var orcCode = int.Parse(longCode.Substring(0, 4));

        Console.WriteLine(orcCode);

    }

}