-er -ey c-- ccc ccd cce cco ccr cct cdc cdd cde cdo cdr cdt cdy ce- cec ced cee ceo cer cet cey co- coc cod coe coo cor cot coy crc crd cre cro crr crt cry ctc ctd cte cto ctr ctt cty cyc cyd cye cyo cyr cyt dcc dcd dce dco dcr dct ddc ddd dde ddo ddr ddt ddy de- dec ded dee deo der det dey doc dod doe doo dor dot doy drc drd dre dro drr drt dry dtc dtd dte dto dtr dtt dty dy- dyc dyd dye dyo dyr dyy ec- ecc ecd ece eco ecr ect ed- edc edd ede edo edr edt edy eec eed eee eeo eer eet eey eo- eoc eod eoe eoo eor eot erc erd ere ero err ert ery etc etd ete eto etr ett ety eyc eyd eye eyo eyr eyt oc- occ ocd oco ocr oct odc odd ode odo odr odt oec oed oee oeo oer oet oey oo- ooc ood ooo oor oot or- orc ord ore oro orr ort ory ot- otc otd ote oto otr ott oyd oye oyo rcc rcd rce rco rcr rct rdc rdd rde rdo rdr rdt rdy re- rec red ree reo rer ret rey roc rod roe roo ror rot roy rrc rrd rrr rrt rtc rtd rte rto rtr rtt rty ry- ryc ryd rye ryo ryr ryy tcc tcd tce tco tcr tct tdc tdd tde tdo tdr tdt tdy te- tec ted tee teo ter tet tey to- toc tod toe too tor tot toy trc trd tre tro trr trt try ttc ttd tte tto ttr ttt tty tyc tyd tye tyo tyr tyt ycc ycd yce yco ycy yde ydo ydt ydy yec yed yee yeo yer yet yey yoc yod yoe yoo yor yot yoy yrc yre yro yrt ytc ytd yte yto ytr ytt yyc yye yyt yyy