-er a-a aaa aae aag aap aar aea aee aeg aep aer ag- aga age agg agp agr ap- apa ape apg app apr ar- ara are arg arp arr eaa eae eag eap ear eea eee eeg eep eer ega ege egg egp egr ep- epa epe epg epp epr era ere erg erp err g-p gaa gae gag gap gar ge- gea gee geg gep ger gga ggg ggp ggr gpa gpe gpg gpp gpr gra gre grg grp grr p-p paa pae pag pap par pea pee peg pep per pga pge pgg pgp pgr ppa ppe ppg ppp ppr pra pre prg prp prr ra- raa rae rag rap rar re- rea ree reg rep rer rga rge rgg rgp rgr rpa rpe rpg rpp rpr rra rrg rrp rrr