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