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