using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(GenerateUnlockCode("1981E76B5A7AA0EDBB4536CAE"));

    }

    private static string GenerateUnlockCode(string registrationNumber)

    {

        return SwapCharacters("500500XPLTB17EX300001010X" + registrationNumber, 7, 2, 3, 4, 5, 6, 1, 8, 9, 1, 5, 2);    

    }

    private static string SwapCharacters(string value, int position1, int position2, int position3, int position4, int position5, int position6, int position7, int position8, int position9, int position10, int position11, int position12)

    {

        char[] array = value.ToCharArray();

        char c = array[position1];

        array[position1] = array[position8];

        array[position8] = array[position6];

        array[position6] = array[position12];

        array[position12] = array[position7];

        array[position7] = array[position2];

        array[position2] = array[position11];

        array[position11] = array[position4];

        array[position4] = array[position10];

        array[position10] = array[position9];

        array[position9] = array[position3];

        array[position3] = array[position5];

        array[position5] = c;

        return new string(array);

    }

}