c-- ccc ccg cck cco ccs ccz cgc cgg cgo cgs ckc cko cks co- coc cog cok coo cos coz csc csg csk cso css csz cz- czc czk czo gcc gcg gck gco gcs ggc ggg ggo ggs ggz gko gks goc gog gok goo gos goz gsc gsg gsk gso gss gzo k-z kcc kcg kck kcs kgc kgo kgs kkc kkk kks koc kog kok koo kos koz ksc ksg ksk kso kss kzo oc- occ ocg ock oco ocs ocz ogc ogg ogo ogs okc okg okk oko oks oo- ooc oog ook ooo oos os- osc osg osk oso oss ozo ozs ozz scc scg sck sco scs sgc sgg sgk sgo sgs sk- skc skg skk sko sks soc sog sok soo sos soz ss- ssc ssg ssk sso sss ssz z-g zco zcs zgg zgs zks zo- zoc zog zok zoo zos zsg zsz zzs zzz