-er -ey a-a a-c aaa aac aae aaf aao aar aay ac- aca acc ace acf aco acr acy aea aec aee aef aeo aer aey af- afa afc afe aff afo afr afy aoa aoc aoe aof aoo aor ar- ara arc are arf aro arr ary ay- aya ayc aye ayf ayo ayr c-- caa cac cae caf cao car cay cca ccc cce ccf cco ccr ce- cea cec cee cef ceo cer cey cfa cfc cfe cff cfo cfr co- coa coc coe cof coo cor coy cra crc cre crf cro crr cry cya cyc cye cyf cyo cyr eaa eac eae eaf eao ear ec- eca ecc ece ecf eco ecr eea eec eee eef eeo eer eey ef- efa efc efe eff efo efr eo- eoa eoc eoe eof eoo eor era erc ere erf ero err ery eya eyc eye eyo eyr faa fac fae faf fao far fay fca fcc fce fcf fco fcr fcy fea fec fee fef feo fer fey ffa ffc ffe fff ffo ffr ffy foa foc foe fof foo for foy fra frc fre frf fro frr fry fy- fya fyc fye fyo oaa oac oae oaf oao oar oc- oca occ ocf oco ocr oea oec oee oef oeo oer oey of- ofa ofc ofe off ofo ofr oo- ooa ooc oof ooo oor or- ora orc ore orf oro orr ory oya oye oyo ra- raa rac rae raf rao rar ray rca rcc rce rcf rco rcr re- rea rec ree ref reo rer rey rfa rfc rfe rff rfo rfr roa roc roe rof roo ror roy rra rrc rrf rrr ry- rya ryc rye ryf ryo ryr ryy yaa yac yae yaf yao yar yay yca ycc yce ycf yco ycy yea yec yee yef yeo yer yey yfa yfc yfe yff yfr yoc yoe yof yoo yor yoy yra yrc yre yrf yro yyc yye yyf yyy