-er -ey a-a a-c a-t aaa aac aae aao aar aat aay ac- aca acc ace aco acr act acy aea aec aee aeo aer aet aey aoa aoc aoe aoo aor aot ar- ara arc are aro arr art ary at- ata atc ate ato atr att ay- aya ayc aye ayo ayr ayt c-- caa cac cae cao car cat cay cca ccc cce cco ccr cct ce- cea cec cee ceo cer cet cey co- coa coc coe coo cor cot coy cra crc cre cro crr crt cry cta ctc cte cto ctr ctt cty cya cyc cye cyo cyr cyt eaa eac eae eao ear eat ec- eca ecc ece eco ecr ect eea eec eee eeo eer eet eey eo- eoa eoc eoe eoo eor eot era erc ere ero err ert ery eta etc ete eto etr ett ety eya eyc eye eyo eyr eyt oaa oac oae oao oar oat oc- oca occ oco ocr oct oea oec oee oeo oer oet oey oo- ooa ooc ooo oor oot or- ora orc ore oro orr ort ory ot- ota otc ote oto otr ott oya oye oyo ra- raa rac rae rao rar rat ray rca rcc rce rco rcr rct re- rea rec ree reo rer ret rey roa roc roe roo ror rot roy rra rrc rrr rrt rta rtc rte rto rtr rtt rty ry- rya ryc rye ryo ryr ryy taa tac tae tao tar tat tay tca tcc tce tco tcr tct te- tea tec tee teo ter tet tey to- toa toc toe too tor tot toy tra trc tre tro trr trt try tta ttc tte tto ttr ttt tty tya tyc tye tyo tyr tyt yaa yac yae yao yar yat yay yca ycc yce yco ycy yea yec yee yeo yer yet yey yoc yoe yoo yor yot yoy yra yrc yre yro yrt yta ytc yte yto ytr ytt yyc yye yyt yyy