-er -ey c-- ccc ccd cce ccm cco ccr ccx cdc cdd cde cdm cdo cdr cdx cdy ce- cec ced cee cem ceo cer cex cey cmc cmd cme cmm cmo cmr cmx cmy co- coc cod coe com coo cor cox coy crc crd cre crm cro crr crx cry cxc cxo cxr cxx cyc cyd cye cym cyo cyr dcc dcd dce dcm dco dcr dcx ddc ddd dde ddm ddo ddr ddx ddy de- dec ded dee dem deo der dex dey dmc dmd dme dmm dmo dmr dmx doc dod doe dom doo dor dox doy drc drd dre drm dro drr drx dry dxc dxd dxo dxr dxx dy- dyc dyd dye dym dyo dyr dyy ec- ecc ecd ece ecm eco ecr ecx ed- edc edd ede edm edo edr edx edy eec eed eee eem eeo eer eex eey em- emc emd eme emm emo emr emx eo- eoc eod eoe eom eoo eor erc erd ere erm ero err ery ex- exc exd exe exo exr exx exy eyc eyd eye eym eyo eyr m-o m-r mc- mcc mcd mce mcm mco mcr mcx mdc mdd mde mdm mdo mdr mdx mdy mec med mee mem meo mer mex mey mmc mmd mme mmm mmo mmr mmx moc mod moe mom moo mor mox moy mrc mrd mre mrm mro mrr mrx mry mxc mxd mxr my- myc myd mye mym myo myr myx oc- occ ocd ocm oco ocr ocx odc odd ode odm odo odr oec oed oee oem oeo oer oex oey om- omc omd ome omm omo omr omx omy oo- ooc ood oom ooo oor oox or- orc ord ore orm oro orr orx ory ox- oxc oxo oxx oxy oyd oye oyo rcc rcd rce rcm rco rcr rcx rdc rdd rde rdm rdo rdr rdx rdy re- rec red ree rem reo rer rex rey rmc rmd rme rmm rmo rmr rmx roc rod roe rom roo ror rox roy rrc rrd rrm rrr rxr ry- ryc ryd rye rym ryo ryr ryy xcd xcr xcx xdc xde xdm xdr xed xee xem xer xex xmc xmd xmm xmo xmr xmx xoc xod xom xoo xor xox xrc xrd xrx xry xxo xxx xxy xyr xyy ycc ycd yce yco ycy yde ydo ydy yec yed yee yem yeo yer yex yey ymc yme ymm ymo yoc yod yoe yom yoo yor yox yoy yrc yre yro yxe yxy yyc yye yyy