using System;

public class Program

{

    public static void Main()

    {

        string mac_address = "SEP FFFF 0000";

        string mac_value = "0009";

        int start = int.Parse(mac_value);

        start = start + 1;

        string new_mac = start.ToString().PadLeft(4,'0');

        Console.WriteLine(new_mac);

    }

}