-er -ey a-a a-c aaa aac aae aag aao aar aas aay ac- aca acc ace acg aco acr acs acy aea aec aee aeg aeo aer aes aey ag- aga agc age agg ago agr ags agy aoa aoc aoe aog aoo aor aos ar- ara arc are arg aro arr ars ary as- asa asc ase asg aso asr ass asy ay- aya ayc aye ayo ayr ays c-- caa cac cae cag cao car cas cay cca ccc cce ccg cco ccr ccs ce- cea cec cee ceg ceo cer ces cey cga cgc cge cgg cgo cgr cgs cgy co- coa coc coe cog coo cor cos coy cra crc cre crg cro crr crs cry csa csc cse csg cso csr css csy cya cyc cye cyg cyo cyr cys eaa eac eae eag eao ear eas ec- eca ecc ece ecg eco ecr ecs eea eec eee eeg eeo eer ees eey ega egc ege egg ego egr egs egy eo- eoa eoc eoe eog eoo eor eos era erc ere erg ero err ers ery es- esa esc ese esg eso esr ess esy eya eyc eye eyo eyr eys gaa gac gae gag gao gar gas gay gca gcc gce gcg gco gcr gcs ge- gea gec gee geg geo ger ges gey gga ggc ggg ggo ggr ggs goa goc goe gog goo gor gos goy gra grc gre grg gro grr grs gry gsa gsc gse gsg gso gsr gss gy- gya gye gyo gyr gys oaa oac oae oag oao oar oas oc- oca occ ocg oco ocr ocs oea oec oee oeg oeo oer oes oey oga ogc oge ogg ogo ogs ogy oo- ooa ooc oog ooo oor oos or- ora orc ore org oro orr ors ory os- osa osc ose osg oso osr oss oya oye oyo oys ra- raa rac rae rag rao rar ras ray rca rcc rce rcg rco rcr rcs re- rea rec ree reg reo rer res rey rga rgc rge rgg rgo rgr rgs roa roc roe rog roo ror ros roy rra rrc rrg rrr rrs rsa rsc rse rsg rso rsr rss ry- rya ryc rye ryg ryo ryr rys ryy saa sac sae sag sao sar sas say sca scc sce scg sco scr scs se- sea sec see seg seo ser ses sey sga sgc sge sgg sgo sgr sgs soa soc soe sog soo sor sos soy sr- sra src sre srg sro srr srs sry ss- ssa ssc sse ssg sso ssr sss sy- sya syc sye syg syr sys yaa yac yae yag yao yar yas yay yca ycc yce yco ycs ycy yea yec yee yeg yeo yer yes yey yga ygc ygo yoc yoe yog yoo yor yos yoy yra yrc yre yrg yro yrs ysa ysc yse ysg yso ysr yss ysy yyc yye yyg yys yyy