3. Grupul de litere incepe cu:

BN-31-A??BN-31-B??BN-31-C??BN-31-D??BN-31-E??BN-31-F??BN-31-G??BN-31-H??BN-31-I??
BN-31-J??BN-31-K??BN-31-L??BN-31-M??BN-31-N??BN-31-O??BN-31-P??BN-31-Q??BN-31-R??
BN-31-S??BN-31-T??BN-31-U??BN-31-V??BN-31-W??BN-31-X??BN-31-Y??BN-31-Z??