-er -ey c-- ccc cce ccf cco ccr ccs ce- cec cee cef ceo cer ces cey cfc cfe cff cfo cfr cfs co- coc coe cof coo cor cos coy crc cre crf cro crr crs cry csc cse csf cso csr css csy cyc cye cyf cyo cyr cys ec- ecc ece ecf eco ecr ecs eec eee eef eeo eer ees eey ef- efc efe eff efo efr efs eo- eoc eoe eof eoo eor eos erc ere erf ero err ers ery es- esc ese esf eso esr ess esy eyc eye eyo eyr eys fcc fce fcf fco fcr fcs fcy fec fee fef feo fer fes fey ffc ffe fff ffo ffr ffs ffy foc foe fof foo for fos foy frc fre frf fro frr frs fry fsc fse fsf fso fsr fss fy- fyc fye fyo oc- occ ocf oco ocr ocs oec oee oef oeo oer oes oey of- ofc ofe off ofo ofr ofs oo- ooc oof ooo oor oos or- orc ore orf oro orr ors ory os- osc ose osf oso osr oss oye oyo oys rcc rce rcf rco rcr rcs re- rec ree ref reo rer res rey rfc rfe rff rfo rfr rfs roc roe rof roo ror ros roy rrc rrf rrr rrs rsc rse rsf rso rsr rss ry- ryc rye ryf ryo ryr rys ryy scc sce scf sco scr scs se- sec see sef seo ser ses sey sfc sfe sff sfo sfr sfs soc soe sof soo sor sos soy sr- src sre srf sro srr srs sry ss- ssc sse ssf sso ssr sss sy- syc sye syr sys ycc yce ycf yco ycs ycy yec yee yef yeo yer yes yey yfc yfe yff yfr yfs yoc yoe yof yoo yor yos yoy yrc yre yrf yro yrs ysc yse yso ysr yss ysy yyc yye yyf yys yyy