-er -ey a-a a-c aaa aac aae aag aan aao aar aay ac- aca acc ace acg acn aco acr acy aea aec aee aeg aen aeo aer aey ag- aga agc age agg agn ago agr agy an- ana anc ane ang ann ano anr any aoa aoc aoe aog aon aoo aor ar- ara arc are arg arn aro arr ary ay- aya ayc aye ayn ayo ayr c-- caa cac cae cag can cao car cay cca ccc cce ccg ccn cco ccr ce- cea cec cee ceg cen ceo cer cey cga cgc cge cgg cgn cgo cgr cgy cn- cna cnc cne cng cnn cno cnr cny co- coa coc coe cog con coo cor coy cra crc cre crg crn cro crr cry cya cyc cye cyg cyn cyo cyr eaa eac eae eag ean eao ear ec- eca ecc ece ecg ecn eco ecr eea eec eee eeg een eeo eer eey ega egc ege egg egn ego egr egy en- ena enc ene eng enn eno enr eny eo- eoa eoc eoe eog eon eoo eor era erc ere erg ern ero err ery eya eyc eye eyn eyo eyr gaa gac gae gag gan gao gar gay gca gcc gce gcg gcn gco gcr ge- gea gec gee geg gen geo ger gey gga ggc ggg ggn ggo ggr gna gnc gne gnn gno gnr goa goc goe gog gon goo gor goy gra grc gre grg grn gro grr gry gy- gya gye gyn gyo gyr naa nac nae nag nan nao nar nay nca ncc nce ncg ncn nco ncr ne- nea nec nee neg nen neo ner ney nga ngc nge ngg ngn ngo nna nnc nne nng nnn nno no- noa noc noe nog non noo nor noy nra nrc nre nrg nrn nro nrr nry nya nyc nye nyg nyn nyo nyy oaa oac oae oag oan oao oar oc- oca occ ocg ocn oco ocr oea oec oee oeg oen oeo oer oey oga ogc oge ogg ogn ogo ogy on- ona onc one ong onn ono onr ony oo- ooa ooc oog oon ooo oor or- ora orc ore org orn oro orr ory oya oye oyo ra- raa rac rae rag ran rao rar ray rca rcc rce rcg rcn rco rcr re- rea rec ree reg ren reo rer rey rga rgc rge rgg rgn rgo rgr rna rnc rng rnn rno rnr rny roa roc roe rog ron roo ror roy rra rrc rrg rrn rrr ry- rya ryc rye ryg ryn ryo ryr ryy yaa yac yae yag yan yao yar yay yca ycc yce yco ycy yea yec yee yeg yen yeo yer yey yga ygc ygo yna yne yng ynn yny yoc yoe yog yon yoo yor yoy yra yrc yre yrg yrn yro yyc yye yyg yyy