-er -ey c-- ccc cce ccf cco ccr cct ce- cec cee cef ceo cer cet cey cfc cfe cff cfo cfr cft co- coc coe cof coo cor cot coy crc cre crf cro crr crt cry ctc cte ctf cto ctr ctt cty cyc cye cyf cyo cyr cyt ec- ecc ece ecf eco ecr ect eec eee eef eeo eer eet eey ef- efc efe eff efo efr eft eo- eoc eoe eof eoo eor eot erc ere erf ero err ert ery etc ete etf eto etr ett ety eyc eye eyo eyr eyt fcc fce fcf fco fcr fct fcy fec fee fef feo fer fet fey ffc ffe fff ffo ffr fft ffy foc foe fof foo for fot foy frc fre frf fro frr frt fry ftc fte ftf fto ftr ftt fty fy- fyc fye fyo oc- occ ocf oco ocr oct oec oee oef oeo oer oet oey of- ofc ofe off ofo ofr oft oo- ooc oof ooo oor oot or- orc ore orf oro orr ort ory ot- otc ote otf oto otr ott oye oyo rcc rce rcf rco rcr rct re- rec ree ref reo rer ret rey rfc rfe rff rfo rfr rft roc roe rof roo ror rot roy rrc rrf rrr rrt rtc rte rtf rto rtr rtt rty ry- ryc rye ryf ryo ryr ryy tcc tce tcf tco tcr tct te- tec tee tef teo ter tet tey tfc tfe tff tfo tfr tft to- toc toe tof too tor tot toy trc tre trf tro trr trt try ttc tte ttf tto ttr ttt tty tyc tye tyf tyo tyr tyt ycc yce ycf yco ycy yec yee yef yeo yer yet yey yfc yfe yff yfr yft yoc yoe yof yoo yor yot yoy yrc yre yrf yro yrt ytc yte ytf yto ytr ytt yyc yye yyf yyt yyy