-er -ey a-a a-c aaa aac aae aag aao aar aay ac- aca acc ace acg aco acr acy aea aec aee aeg aeo aer aey ag- aga agc age agg ago agr agy aoa aoc aoe aog aoo aor ar- ara arc are arg aro arr ary ay- aya ayc aye ayo ayr c-- caa cac cae cag cao car cay cca ccc cce ccg cco ccr ce- cea cec cee ceg ceo cer cey cga cgc cge cgg cgo cgr cgy co- coa coc coe cog coo cor coy cra crc cre crg cro crr cry cya cyc cye cyg cyo cyr eaa eac eae eag eao ear ec- eca ecc ece ecg eco ecr eea eec eee eeg eeo eer eey ega egc ege egg ego egr egy eo- eoa eoc eoe eog eoo eor era erc ere erg ero err ery eya eyc eye eyo eyr gaa gac gae gag gao gar gay gca gcc gce gcg gco gcr ge- gea gec gee geg geo ger gey gga ggc ggg ggo ggr goa goc goe gog goo gor goy gra grc gre grg gro grr gry gy- gya gye gyo gyr oaa oac oae oag oao oar oc- oca occ ocg oco ocr oea oec oee oeg oeo oer oey oga ogc oge ogg ogo ogy oo- ooa ooc oog ooo oor or- ora orc ore org oro orr ory oya oye oyo ra- raa rac rae rag rao rar ray rca rcc rce rcg rco rcr re- rea rec ree reg reo rer rey rga rgc rge rgg rgo rgr roa roc roe rog roo ror roy rra rrc rrg rrr ry- rya ryc rye ryg ryo ryr ryy yaa yac yae yag yao yar yay yca ycc yce yco ycy yea yec yee yeg yeo yer yey yga ygc ygo yoc yoe yog yoo yor yoy yra yrc yre yrg yro yyc yye yyg yyy