3. Grupul de litere incepe cu:

BR-27-A??BR-27-B??BR-27-C??BR-27-D??BR-27-E??BR-27-F??BR-27-G??BR-27-H??BR-27-I??
BR-27-J??BR-27-K??BR-27-L??BR-27-M??BR-27-N??BR-27-O??BR-27-P??BR-27-Q??BR-27-R??
BR-27-S??BR-27-T??BR-27-U??BR-27-V??BR-27-W??BR-27-X??BR-27-Y??BR-27-Z??