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