-er a-a aaa aae aag aak aao aap aar aea aee aeg aek aeo aep aer ag- aga age agg agk ago agp agr aka ake akg akk ako akp akr aoa aoe aog aok aoo aop aor ap- apa ape apg apk apo app apr ar- ara are arg ark aro arp arr eaa eae eag eak eao eap ear eea eee eeg eek eeo eep eer ega ege egg ego egp egr eka eke ekg eko ekp ekr eo- eoa eoe eog eok eoo eop eor ep- epa epe epg epo epp epr era ere erg erk ero erp err g-p gaa gae gag gak gao gap gar ge- gea gee geg gek geo gep ger gga ggg ggo ggp ggr gka gko gkp goa goe gog gok goo gop gor gpa gpe gpg gpk gpo gpp gpr gra gre grg grk gro grp grr ka- kaa kae kag kak kao kap kar ke- kea kee keg kek keo kep ker kga kgo kgp kke kkk kkp kkr koa koe kog kok koo kop kor kpa kpe kpk kpo kpp kpr kra krg krk kro krp krr oaa oae oag oak oao oap oar oea oee oeg oeo oep oer oga oge ogg ogo ogp oka oke okg okk oko okp okr oo- ooa oog ook ooo oop oor op- opa ope opg opk opo opp opr or- ora ore org ork oro orp orr p-p paa pae pag pak pao pap par pea pee peg pek peo pep per pga pge pgg pgk pgo pgp pgr pka pke pkg pko pkp pkr poa poe pog pok poo pop por ppa ppe ppg ppk ppo ppp ppr pra pre prg prk pro prp prr ra- raa rae rag rak rao rap rar re- rea ree reg rek reo rep rer rga rge rgg rgk rgo rgp rgr rke rkg rkk rko rkp roa roe rog rok roo rop ror rpa rpe rpg rpk rpo rpp rpr rra rrg rrk rrp rrr