Valideringskod
      *   *****   *     *   *****    *****   
      *  *     *  **    *  *     *  *     *  
      *  *        * *   *        *  *     *  
      *  *        *  *  *       *   *     *  
      *  *        *   * *     **    *   * *  
*     *  *     *  *    **   **      *    *   
 *****    *****   *     *  *******   **** *