-er -ey c-- ccc cce ccf ccm cco ccr ce- cec cee cef cem ceo cer cey cfc cfe cff cfm cfo cfr cmc cme cmf cmm cmo cmr cmy co- coc coe cof com coo cor coy crc cre crf crm cro crr cry cyc cye cyf cym cyo cyr ec- ecc ece ecf ecm eco ecr eec eee eef eem eeo eer eey ef- efc efe eff efm efo efr em- emc eme emf emm emo emr eo- eoc eoe eof eom eoo eor erc ere erf erm ero err ery eyc eye eym eyo eyr fcc fce fcf fcm fco fcr fcy fec fee fef fem feo fer fey ffc ffe fff ffm ffo ffr ffy fmc fme fmf fmm fmo fmr foc foe fof fom foo for foy frc fre frf frm fro frr fry fy- fyc fye fyo m-f m-o m-r mc- mcc mce mcf mcm mco mcr mec mee mef mem meo mer mey mfc mfe mff mfm mfo mfr mfy mmc mme mmf mmm mmo mmr moc moe mof mom moo mor moy mrc mre mrf mrm mro mrr mry my- myc mye myf mym myo myr oc- occ ocf ocm oco ocr oec oee oef oem oeo oer oey of- ofc ofe off ofm ofo ofr om- omc ome omf omm omo omr omy oo- ooc oof oom ooo oor or- orc ore orf orm oro orr ory oye oyo rcc rce rcf rcm rco rcr re- rec ree ref rem reo rer rey rfc rfe rff rfm rfo rfr rmc rme rmf rmm rmo rmr roc roe rof rom roo ror roy rrc rrf rrm rrr ry- ryc rye ryf rym ryo ryr ryy ycc yce ycf yco ycy yec yee yef yem yeo yer yey yfc yfe yff yfm yfr ymc yme ymm ymo yoc yoe yof yom yoo yor yoy yrc yre yrf yro yyc yye yyf yyy