3. Grupul de litere incepe cu:

AB-45-A??AB-45-B??AB-45-C??AB-45-D??AB-45-E??AB-45-F??AB-45-G??AB-45-H??AB-45-I??
AB-45-J??AB-45-K??AB-45-L??AB-45-M??AB-45-N??AB-45-O??AB-45-P??AB-45-Q??AB-45-R??
AB-45-S??AB-45-T??AB-45-U??AB-45-V??AB-45-W??AB-45-X??AB-45-Y??AB-45-Z??