-er a-a aaa aae aag aak aao aar aau aea aee aeg aek aeo aer aeu ag- aga age agg agk ago agr agu aka ake akg akk ako akr aku aoa aoe aog aok aoo aor aou ar- ara are arg ark aro arr aru au- aua aue aug auk auo aur eaa eae eag eak eao ear eau eea eee eeg eek eeo eer ega ege egg ego egr egu eka eke ekg eko ekr eku eo- eoa eoe eog eok eoo eor eou era ere erg erk ero err eru eu- eua eue eug eur gaa gae gag gak gao gar gau ge- gea gee geg gek geo ger geu gga ggg ggo ggr ggu gka gko goa goe gog gok goo gor gou gra gre grg grk gro grr gru gu- gua gue gug guk guo gur guu ka- kaa kae kag kak kao kar kau ke- kea kee keg kek keo ker kga kgo kgu kke kkk kkr kku koa koe kog kok koo kor kou kra krg krk kro krr kru kue kug kuk kur kuu oaa oae oag oak oao oar oau oea oee oeg oeo oer oga oge ogg ogo oka oke okg okk oko okr oku oo- ooa oog ook ooo oor or- ora ore org ork oro orr oru ou- oua oue ouk ouo our ra- raa rae rag rak rao rar rau re- rea ree reg rek reo rer reu rga rge rgg rgk rgo rgr rke rkg rkk rko rku roa roe rog rok roo ror rou rra rrg rrk rrr rru rua rue rug ruk ruo rur ruu ua- uaa uae uag uak uao uar uau uea uee ueg uer uga uge ugg ugk ugo ugr ugu uka uke ukk ukr uku uoa uoe uog uok uoo uor ur- ura ure urg urk uro urr uru uua uue uug uur uuu