3. Grupul de litere incepe cu:

BN-57-A??BN-57-B??BN-57-C??BN-57-D??BN-57-E??BN-57-F??BN-57-G??BN-57-H??BN-57-I??
BN-57-J??BN-57-K??BN-57-L??BN-57-M??BN-57-N??BN-57-O??BN-57-P??BN-57-Q??BN-57-R??
BN-57-S??BN-57-T??BN-57-U??BN-57-V??BN-57-W??BN-57-X??BN-57-Y??BN-57-Z??