c-- ccc cce ccg ccm cco ccs ce- cec cee ceg cem ceo ces cgc cge cgg cgm cgo cgs cmc cme cmg cmm cmo cms co- coc coe cog com coo cos csc cse csg csm cso css ec- ecc ece ecg ecm eco ecs eec eee eeg eem eeo ees egc ege egg egm ego egs em- emc eme emg emm emo ems eo- eoc eoe eog eom eoo eos es- esc ese esg esm eso ess gcc gce gcg gcm gco gcs ge- gec gee geg gem geo ges ggc ggg ggm ggo ggs gmc gme gmg gmm gmo gms goc goe gog gom goo gos gsc gse gsg gsm gso gss m-o mc- mcc mce mcg mcm mco mcs mec mee meg mem meo mes mgc mge mgm mgo mgs mmc mme mmg mmm mmo mms moc moe mog mom moo mos msc mse msg msm mso mss oc- occ ocg ocm oco ocs oec oee oeg oem oeo oes ogc oge ogg ogo ogs om- omc ome omg omm omo oms oo- ooc oog oom ooo oos os- osc ose osg osm oso oss scc sce scg scm sco scs se- sec see seg sem seo ses sgc sge sgg sgm sgo sgs smc sme smg smm smo sms soc soe sog som soo sos ss- ssc sse ssg ssm sso sss