-er -ey a-a a-c a-t aaa aac aae aag aan aao aar aat aay ac- aca acc ace acg acn aco acr act acy aea aec aee aeg aen aeo aer aet aey ag- aga agc age agg agn ago agr agt agy an- ana anc ane ang ann ano anr ant any aoa aoc aoe aog aon aoo aor aot ar- ara arc are arg arn aro arr art ary at- ata atc ate atg atn ato atr att ay- aya ayc aye ayn ayo ayr ayt c-- caa cac cae cag can cao car cat cay cca ccc cce ccg ccn cco ccr cct ce- cea cec cee ceg cen ceo cer cet cey cga cgc cge cgg cgn cgo cgr cgt cgy cn- cna cnc cne cng cnn cno cnr cnt cny co- coa coc coe cog con coo cor cot coy cra crc cre crg crn cro crr crt cry cta ctc cte ctg ctn cto ctr ctt cty cya cyc cye cyg cyn cyo cyr cyt eaa eac eae eag ean eao ear eat ec- eca ecc ece ecg ecn eco ecr ect eea eec eee eeg een eeo eer eet eey ega egc ege egg egn ego egr egt egy en- ena enc ene eng enn eno enr ent eny eo- eoa eoc eoe eog eon eoo eor eot era erc ere erg ern ero err ert ery eta etc ete etg etn eto etr ett ety eya eyc eye eyn eyo eyr eyt gaa gac gae gag gan gao gar gat gay gca gcc gce gcg gcn gco gcr gct ge- gea gec gee geg gen geo ger get gey gga ggc ggg ggn ggo ggr ggt gna gnc gne gnn gno gnr gnt goa goc goe gog gon goo gor got goy gra grc gre grg grn gro grr grt gry gta gtc gte gtg gtn gto gtr gtt gty gy- gya gye gyn gyo gyr naa nac nae nag nan nao nar nat nay nca ncc nce ncg ncn nco ncr nct ne- nea nec nee neg nen neo ner net ney nga ngc nge ngg ngn ngo ngt nna nnc nne nng nnn nno nnt no- noa noc noe nog non noo nor not noy nra nrc nre nrg nrn nro nrr nrt nry nta ntc nte ntg ntn nto ntr ntt nya nyc nye nyg nyn nyo nyt nyy oaa oac oae oag oan oao oar oat oc- oca occ ocg ocn oco ocr oct oea oec oee oeg oen oeo oer oet oey oga ogc oge ogg ogn ogo ogt ogy on- ona onc one ong onn ono onr ont ony oo- ooa ooc oog oon ooo oor oot or- ora orc ore org orn oro orr ort ory ot- ota otc ote otg otn oto otr ott oya oye oyo ra- raa rac rae rag ran rao rar rat ray rca rcc rce rcg rcn rco rcr rct re- rea rec ree reg ren reo rer ret rey rga rgc rge rgg rgn rgo rgr rgt rna rnc rng rnn rno rnr rnt rny roa roc roe rog ron roo ror rot roy rra rrc rrg rrn rrr rrt rta rtc rte rtg rtn rto rtr rtt rty ry- rya ryc rye ryg ryn ryo ryr ryy taa tac tae tag tan tao tar tat tay tca tcc tce tcg tcn tco tcr tct te- tea tec tee teg ten teo ter tet tey tga tgc tge tgg tgn tgo tgr tgt tgy tna tnc tne tng tnn tno tnr tnt to- toa toc toe tog ton too tor tot toy tra trc tre trg trn tro trr trt try tta ttc tte ttg ttn tto ttr ttt tty tya tyc tye tyg tyn tyo tyr tyt yaa yac yae yag yan yao yar yat yay yca ycc yce yco ycy yea yec yee yeg yen yeo yer yet yey yga ygc ygo yna yne yng ynn yny yoc yoe yog yon yoo yor yot yoy yra yrc yre yrg yrn yro yrt yta ytc yte ytn yto ytr ytt yyc yye yyg yyt yyy