3. Grupul de litere incepe cu:

BR-60-A??BR-60-B??BR-60-C??BR-60-D??BR-60-E??BR-60-F??BR-60-G??BR-60-H??BR-60-I??
BR-60-J??BR-60-K??BR-60-L??BR-60-M??BR-60-N??BR-60-O??BR-60-P??BR-60-Q??BR-60-R??
BR-60-S??BR-60-T??BR-60-U??BR-60-V??BR-60-W??BR-60-X??BR-60-Y??BR-60-Z??