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