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