-er -ey c-- ccc ccd cce cco ccr cdc cdd cde cdo cdr cdy ce- cec ced cee ceo cer cey co- coc cod coe coo cor coy crc crd cre cro crr cry cyc cyd cye cyo cyr dcc dcd dce dco dcr ddc ddd dde ddo ddr ddy de- dec ded dee deo der dey doc dod doe doo dor doy drc drd dre dro drr dry dy- dyc dyd dye dyo dyr dyy ec- ecc ecd ece eco ecr ed- edc edd ede edo edr edy eec eed eee eeo eer eey eo- eoc eod eoe eoo eor erc erd ere ero err ery eyc eyd eye eyo eyr oc- occ ocd oco ocr odc odd ode odo odr oec oed oee oeo oer oey oo- ooc ood ooo oor or- orc ord ore oro orr ory oyd oye oyo rcc rcd rce rco rcr rdc rdd rde rdo rdr rdy re- rec red ree reo rer rey roc rod roe roo ror roy rrc rrd rrr ry- ryc ryd rye ryo ryr ryy ycc ycd yce yco ycy yde ydo ydy yec yed yee yeo yer yey yoc yod yoe yoo yor yoy yrc yre yro yyc yye yyy