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