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