-er -ey c-- ccc ccd cce cco ccr ccv cdc cdd cde cdo cdr cdv cdy ce- cec ced cee ceo cer cev cey co- coc cod coe coo cor cov coy crc crd cre cro crr crv cry cvc cvd cve cvo cvr cvv cyc cyd cye cyo cyr dcc dcd dce dco dcr dcv ddc ddd dde ddo ddr ddy de- dec ded dee deo der dev dey doc dod doe doo dor dov doy drc drd dre dro drr drv dry dvc dvd dve dvr dy- dyc dyd dye dyo dyr dyy ec- ecc ecd ece eco ecr ecv ed- edc edd ede edo edr edy eec eed eee eeo eer eev eey eo- eoc eod eoe eoo eor erc erd ere ero err erv ery evc evd eve evo evr evv evy eyc eyd eye eyo eyr oc- occ ocd oco ocr ocv odc odd ode odo odr odv oec oed oee oeo oer oey oo- ooc ood ooo oor oov or- orc ord ore oro orr orv ory ov- ovc ovd ove ovo ovv oyd oye oyo rcc rcd rce rco rcr rcv rdc rdd rde rdo rdr rdv rdy re- rec red ree reo rer rev rey roc rod roe roo ror rov roy rrc rrd rrr rvc rvd rve rvo rvr rvv rvy ry- ryc ryd rye ryo ryr ryy v-e vcc vcd vce vco vcr vcy vdc vdd vde vdo vdr vdv vec ved vee veo ver vey voc vod voe voo vor vov voy vrc vrd vre vrr vry vvc vvo vvr vvv vyd vye ycc ycd yce yco ycv ycy yde ydo ydy yec yed yee yeo yer yev yey yoc yod yoe yoo yor yoy yrc yre yro yve yvo yvr yvy yyc yye yyy