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