-er -ey c-- ccc ccd cce ccf cco ccr cdc cdd cde cdf cdo cdr cdy ce- cec ced cee cef ceo cer cey cfc cfd cfe cff cfo cfr co- coc cod coe cof coo cor coy crc crd cre crf cro crr cry cyc cyd cye cyf cyo cyr dcc dcd dce dcf dco dcr ddc ddd dde ddf ddo ddr ddy de- dec ded dee def deo der dey dfc dfd dfe dff dfo dfr doc dod doe dof doo dor doy drc drd dre dro drr dry dy- dyc dyd dye dyo dyr dyy ec- ecc ecd ece ecf eco ecr ed- edc edd ede edf edo edr edy eec eed eee eef eeo eer eey ef- efc efd efe eff efo efr eo- eoc eod eoe eof eoo eor erc erd ere erf ero err ery eyc eyd eye eyo eyr fcc fcd fce fcf fco fcr fcy fdc fdd fde fdf fdo fdr fec fed fee fef feo fer fey ffc ffd ffe fff ffo ffr ffy foc foe fof foo for foy frc frd fre frf fro frr fry fy- fyc fye fyo oc- occ ocd ocf oco ocr odc odd ode odf odo odr oec oed oee oef oeo oer oey of- ofc ofd ofe off ofo ofr oo- ooc ood oof ooo oor or- orc ord ore orf oro orr ory oyd oye oyo rcc rcd rce rcf rco rcr rdc rdd rde rdf rdo rdr rdy re- rec red ree ref reo rer rey rfc rfd rfe rff rfo rfr roc rod roe rof roo ror roy rrc rrd rrf rrr ry- ryc ryd rye ryf ryo ryr ryy ycc ycd yce ycf yco ycy yde ydo ydy yec yed yee yef yeo yer yey yfc yfd yfe yff yfr yoc yod yoe yof yoo yor yoy yrc yre yrf yro yyc yye yyf yyy