-er a-a aaa aae aag aao aap aar aea aee aeg aeo aep aer ag- aga age agg ago agp agr aoa aoe aog aoo aop aor ap- apa ape apg apo app apr ar- ara are arg aro arp arr eaa eae eag eao eap ear eea eee eeg eeo eep eer ega ege egg ego egp egr eo- eoa eoe eog eoo eop eor ep- epa epe epg epo epp epr era ere erg ero erp err g-p gaa gae gag gao gap gar ge- gea gee geg geo gep ger gga ggg ggo ggp ggr goa goe gog goo gop gor gpa gpe gpg gpo gpp gpr gra gre grg gro grp grr oaa oae oag oao oap oar oea oee oeg oeo oep oer oga oge ogg ogo ogp oo- ooa oog ooo oop oor op- opa ope opg opo opp opr or- ora ore org oro orp orr p-p paa pae pag pao pap par pea pee peg peo pep per pga pge pgg pgo pgp pgr poa poe pog poo pop por ppa ppe ppg ppo ppp ppr pra pre prg pro prp prr ra- raa rae rag rao rap rar re- rea ree reg reo rep rer rga rge rgg rgo rgp rgr roa roe rog roo rop ror rpa rpe rpg rpo rpp rpr rra rrg rrp rrr