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