3. Grupul de litere incepe cu:

AB-72-A??AB-72-B??AB-72-C??AB-72-D??AB-72-E??AB-72-F??AB-72-G??AB-72-H??AB-72-I??
AB-72-J??AB-72-K??AB-72-L??AB-72-M??AB-72-N??AB-72-O??AB-72-P??AB-72-Q??AB-72-R??
AB-72-S??AB-72-T??AB-72-U??AB-72-V??AB-72-W??AB-72-X??AB-72-Y??AB-72-Z??