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