c-- ccc ccg ccm cco ccs cgc cgg cgm cgo cgs cmc cmg cmm cmo cms co- coc cog com coo cos csc csg csm cso css gcc gcg gcm gco gcs ggc ggg ggm ggo ggs gmc gmg gmm gmo gms goc gog gom goo gos gsc gsg gsm gso gss m-o mc- mcc mcg mcm mco mcs mgc mgm mgo mgs mmc mmg mmm mmo mms moc mog mom moo mos msc msg msm mso mss oc- occ ocg ocm oco ocs ogc ogg ogo ogs om- omc omg omm omo oms oo- ooc oog oom ooo oos os- osc osg osm oso oss scc scg scm sco scs sgc sgg sgm sgo sgs smc smg smm smo sms soc sog som soo sos ss- ssc ssg ssm sso sss