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