c-- ccc cce ccg cck cco ccs ce- cec cee ceg cek ceo ces cgc cge cgg cgo cgs ckc cko cks co- coc coe cog cok coo cos csc cse csg csk cso css ec- ecc ece ecg eck eco ecs eec eee eeg eek eeo ees egc ege egg ego egs ekc eke ekg eko eks eo- eoc eoe eog eok eoo eos es- esc ese esg esk eso ess gcc gce gcg gck gco gcs ge- gec gee geg gek geo ges ggc ggg ggo ggs gko gks goc goe gog gok goo gos gsc gse gsg gsk gso gss kcc kce kcg kck kcs ke- kec kee keg kek keo kes kgc kgo kgs kkc kke kkk kks koc koe kog kok koo kos ksc kse ksg ksk kso kss oc- occ ocg ock oco ocs oec oee oeg oeo oes ogc oge ogg ogo ogs okc oke okg okk oko oks oo- ooc oog ook ooo oos os- osc ose osg osk oso oss scc sce scg sck sco scs se- sec see seg sek seo ses sgc sge sgg sgk sgo sgs sk- skc ske skg skk sko sks soc soe sog sok soo sos ss- ssc sse ssg ssk sso sss