3. Grupul de litere incepe cu:

PH-90-A??PH-90-B??PH-90-C??PH-90-D??PH-90-E??PH-90-F??PH-90-G??PH-90-H??PH-90-I??
PH-90-J??PH-90-K??PH-90-L??PH-90-M??PH-90-N??PH-90-O??PH-90-P??PH-90-Q??PH-90-R??
PH-90-S??PH-90-T??PH-90-U??PH-90-V??PH-90-W??PH-90-X??PH-90-Y??PH-90-Z??