c-- ccc ccd ccm cco ccr ccx cdc cdd cdm cdo cdr cdx cdy cmc cmd cmm cmo cmr cmx cmy co- coc cod com coo cor cox coy crc crd crm cro crr crx cry cxc cxo cxr cxx cyc cyd cym cyo cyr dcc dcd dcm dco dcr dcx ddc ddd ddm ddo ddr ddx ddy dmc dmd dmm dmo dmr dmx doc dod dom doo dor dox doy drc drd drm dro drr drx dry dxc dxd dxo dxr dxx dy- dyc dyd dym dyo dyr dyy m-o m-r mc- mcc mcd mcm mco mcr mcx mdc mdd mdm mdo mdr mdx mdy mmc mmd mmm mmo mmr mmx moc mod mom moo mor mox moy mrc mrd mrm mro mrr mrx mry mxc mxd mxr my- myc myd mym myo myr myx oc- occ ocd ocm oco ocr ocx odc odd odm odo odr om- omc omd omm omo omr omx omy oo- ooc ood oom ooo oor oox or- orc ord orm oro orr orx ory ox- oxc oxo oxx oxy oyd oyo rcc rcd rcm rco rcr rcx rdc rdd rdm rdo rdr rdx rdy rmc rmd rmm rmo rmr rmx roc rod rom roo ror rox roy rrc rrd rrm rrr rxr ry- ryc ryd rym ryo ryr ryy xcd xcr xcx xdc xdm xdr xmc xmd xmm xmo xmr xmx xoc xod xom xoo xor xox xrc xrd xrx xry xxo xxx xxy xyr xyy ycc ycd yco ycy ydo ydy ymc ymm ymo yoc yod yom yoo yor yox yoy yrc yro yxy yyc yyy