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