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