-er -ey a-a a-c aaa aac aad aae aag aao aar aay ac- aca acc acd ace acg aco acr acy ad- ada adc add ade adg ado adr ady aea aec aed aee aeg aeo aer aey ag- aga agc agd age agg ago agr agy aoa aoc aod aoe aog aoo aor ar- ara arc ard are arg aro arr ary ay- aya ayc ayd aye ayo ayr c-- caa cac cad cae cag cao car cay cca ccc ccd cce ccg cco ccr cda cdc cdd cde cdg cdo cdr cdy ce- cea cec ced cee ceg ceo cer cey cga cgc cgd cge cgg cgo cgr cgy co- coa coc cod coe cog coo cor coy cra crc crd cre crg cro crr cry cya cyc cyd cye cyg cyo cyr daa dac dad dae dag dao dar day dca dcc dcd dce dcg dco dcr dda ddc ddd dde ddg ddo ddr ddy de- dea dec ded dee deg deo der dey dga dgc dgd dge dgg dgr doa doc dod doe dog doo dor doy dra drc drd dre drg dro drr dry dy- dya dyc dyd dye dyo dyr dyy eaa eac ead eae eag eao ear ec- eca ecc ecd ece ecg eco ecr ed- eda edc edd ede edg edo edr edy eea eec eed eee eeg eeo eer eey ega egc egd ege egg ego egr egy eo- eoa eoc eod eoe eog eoo eor era erc erd ere erg ero err ery eya eyc eyd eye eyo eyr g-d gaa gac gad gae gag gao gar gay gca gcc gcd gce gcg gco gcr gda gdc gdd gde gdo gdr ge- gea gec ged gee geg geo ger gey gga ggc ggd ggg ggo ggr goa goc god goe gog goo gor goy gra grc grd gre grg gro grr gry gy- gya gyd gye gyo gyr oaa oac oad oae oag oao oar oc- oca occ ocd ocg oco ocr oda odc odd ode odg odo odr oea oec oed oee oeg oeo oer oey oga ogc ogd oge ogg ogo ogy oo- ooa ooc ood oog ooo oor or- ora orc ord ore org oro orr ory oya oyd oye oyo ra- raa rac rad rae rag rao rar ray rca rcc rcd rce rcg rco rcr rda rdc rdd rde rdg rdo rdr rdy re- rea rec red ree reg reo rer rey rga rgc rgd rge rgg rgo rgr roa roc rod roe rog roo ror roy rra rrc rrd rrg rrr ry- rya ryc ryd rye ryg ryo ryr ryy yaa yac yad yae yag yao yar yay yca ycc ycd yce yco ycy yda yde ydg ydo ydy yea yec yed yee yeg yeo yer yey yga ygc ygo yoc yod yoe yog yoo yor yoy yra yrc yre yrg yro yyc yye yyg yyy