c-- ccc ccd ccm ccn cco ccs cdc cdd cdm cdn cdo cds cmc cmd cmm cmn cmo cms cn- cnc cnd cnm cnn cno cns co- coc cod com con coo cos csc csd csm csn cso css dcc dcd dcm dcn dco dcs ddc ddd ddm ddn ddo dds dmc dmd dmm dmn dmo dms dnc dnd dnm dnn dno dns doc dod dom don doo dos dsc dsd dsm dsn dso dss m-o mc- mcc mcd mcm mcn mco mcs mdc mdd mdm mdn mdo mds mmc mmd mmm mmn mmo mms mnc mnm mnn mno mns moc mod mom mon moo mos msc msd msm msn mso mss ncc ncd ncm ncn nco ncs ndc ndd ndm ndn ndo nds nmc nmd nmm nmn nmo nms nnc nnm nnn nno nns no- noc nod nom non noo nos nsc nsd nsm nsn nso nss oc- occ ocd ocm ocn oco ocs odc odd odm odn odo ods om- omc omd omm omn omo oms on- onc ond onn ono ons oo- ooc ood oom oon ooo oos os- osc osd osm osn oso oss scc scd scm scn sco scs sdc sdd sdm sdn sdo sds smc smd smm smn smo sms snc snd snm snn sno sns soc sod som son soo sos ss- ssc ssd ssm ssn sso sss