-er -ey a-a a-c a-t aaa aac aae aag aao aar aat aay ac- aca acc ace acg aco acr act acy aea aec aee aeg aeo aer aet aey ag- aga agc age agg ago agr agt agy aoa aoc aoe aog aoo aor aot ar- ara arc are arg aro arr art ary at- ata atc ate atg ato atr att ay- aya ayc aye ayo ayr ayt c-- caa cac cae cag cao car cat cay cca ccc cce ccg cco ccr cct ce- cea cec cee ceg ceo cer cet cey cga cgc cge cgg cgo cgr cgt cgy co- coa coc coe cog coo cor cot coy cra crc cre crg cro crr crt cry cta ctc cte ctg cto ctr ctt cty cya cyc cye cyg cyo cyr cyt eaa eac eae eag eao ear eat ec- eca ecc ece ecg eco ecr ect eea eec eee eeg eeo eer eet eey ega egc ege egg ego egr egt egy eo- eoa eoc eoe eog eoo eor eot era erc ere erg ero err ert ery eta etc ete etg eto etr ett ety eya eyc eye eyo eyr eyt gaa gac gae gag gao gar gat gay gca gcc gce gcg gco gcr gct ge- gea gec gee geg geo ger get gey gga ggc ggg ggo ggr ggt goa goc goe gog goo gor got goy gra grc gre grg gro grr grt gry gta gtc gte gtg gto gtr gtt gty gy- gya gye gyo gyr oaa oac oae oag oao oar oat oc- oca occ ocg oco ocr oct oea oec oee oeg oeo oer oet oey oga ogc oge ogg ogo ogt ogy oo- ooa ooc oog ooo oor oot or- ora orc ore org oro orr ort ory ot- ota otc ote otg oto otr ott oya oye oyo ra- raa rac rae rag rao rar rat ray rca rcc rce rcg rco rcr rct re- rea rec ree reg reo rer ret rey rga rgc rge rgg rgo rgr rgt roa roc roe rog roo ror rot roy rra rrc rrg rrr rrt rta rtc rte rtg rto rtr rtt rty ry- rya ryc rye ryg ryo ryr ryy taa tac tae tag tao tar tat tay tca tcc tce tcg tco tcr tct te- tea tec tee teg teo ter tet tey tga tgc tge tgg tgo tgr tgt tgy to- toa toc toe tog too tor tot toy tra trc tre trg tro trr trt try tta ttc tte ttg tto ttr ttt tty tya tyc tye tyg tyo tyr tyt yaa yac yae yag yao yar yat yay yca ycc yce yco ycy yea yec yee yeg yeo yer yet yey yga ygc ygo yoc yoe yog yoo yor yot yoy yra yrc yre yrg yro yrt yta ytc yte yto ytr ytt yyc yye yyg yyt yyy