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