-er -ey c-- ccc cce ccf cco ccr ce- cec cee cef ceo cer cey cfc cfe cff cfo cfr co- coc coe cof coo cor coy crc cre crf cro crr cry cyc cye cyf cyo cyr ec- ecc ece ecf eco ecr eec eee eef eeo eer eey ef- efc efe eff efo efr eo- eoc eoe eof eoo eor erc ere erf ero err ery eyc eye eyo eyr fcc fce fcf fco fcr fcy fec fee fef feo fer fey ffc ffe fff ffo ffr ffy foc foe fof foo for foy frc fre frf fro frr fry fy- fyc fye fyo oc- occ ocf oco ocr oec oee oef oeo oer oey of- ofc ofe off ofo ofr oo- ooc oof ooo oor or- orc ore orf oro orr ory oye oyo rcc rce rcf rco rcr re- rec ree ref reo rer rey rfc rfe rff rfo rfr roc roe rof roo ror roy rrc rrf rrr ry- ryc rye ryf ryo ryr ryy ycc yce ycf yco ycy yec yee yef yeo yer yey yfc yfe yff yfr yoc yoe yof yoo yor yoy yrc yre yrf yro yyc yye yyf yyy