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