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