using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {

        }

        public static string code(string numeroUtilisateur)
        {
            string str = "";
            int num = 0;
            for (int i = 0; i < numeroUtilisateur.Length; i++)
            {
                if (numeroUtilisateur[i] != '-')
                {
                    str = str + "BCDFGHJKMPQRTVWXY2346789"[Convert.ToInt16((int)(numeroUtilisateur[i] + i)) % 0x17];
                    num++;
                    if ((num % 3) == 0)
                    {
                        str = str + "-";
                    }
                }
            }
            if (str.LastIndexOf('-') == (str.Length - 1))
            {
                str = str.Substring(0, str.Length - 1);
            }
            return str;
        }





    }
}