c-- ccc ccd ccf ccm cco ccr cdc cdd cdf cdm cdo cdr cdy cfc cfd cff cfm cfo cfr cmc cmd cmf cmm cmo cmr cmy co- coc cod cof com coo cor coy crc crd crf crm cro crr cry cyc cyd cyf cym cyo cyr dcc dcd dcf dcm dco dcr ddc ddd ddf ddm ddo ddr ddy dfc dfd dff dfm dfo dfr dmc dmd dmf dmm dmo dmr doc dod dof dom doo dor doy drc drd drm dro drr dry dy- dyc dyd dym dyo dyr dyy fcc fcd fcf fcm fco fcr fcy fdc fdd fdf fdm fdo fdr ffc ffd fff ffm ffo ffr ffy fmc fmd fmf fmm fmo fmr foc fof fom foo for foy frc frd frf frm fro frr fry fy- fyc fyo m-f m-o m-r mc- mcc mcd mcf mcm mco mcr mdc mdd mdf mdm mdo mdr mdy mfc mfd mff mfm mfo mfr mfy mmc mmd mmf mmm mmo mmr moc mod mof mom moo mor moy mrc mrd mrf mrm mro mrr mry my- myc myd myf mym myo myr oc- occ ocd ocf ocm oco ocr odc odd odf odm odo odr of- ofc ofd off ofm ofo ofr om- omc omd omf omm omo omr omy oo- ooc ood oof oom ooo oor or- orc ord orf orm oro orr ory oyd oyo rcc rcd rcf rcm rco rcr rdc rdd rdf rdm rdo rdr rdy rfc rfd rff rfm rfo rfr rmc rmd rmf rmm rmo rmr roc rod rof rom roo ror roy rrc rrd rrf rrm rrr ry- ryc ryd ryf rym ryo ryr ryy ycc ycd ycf yco ycy ydo ydy yfc yfd yff yfm yfr ymc ymm ymo yoc yod yof yom yoo yor yoy yrc yrf yro yyc yyf yyy