c-- ccc cce ccg cck ccn cco ccs ce- cec cee ceg cek cen ceo ces cgc cge cgg cgn cgo cgs ckc cko cks cn- cnc cne cng cnn cno cns co- coc coe cog cok con coo cos csc cse csg csk csn cso css ec- ecc ece ecg eck ecn eco ecs eec eee eeg eek een eeo ees egc ege egg egn ego egs ekc eke ekg eko eks en- enc ene eng enk enn eno ens eo- eoc eoe eog eok eon eoo eos es- esc ese esg esk esn eso ess gcc gce gcg gck gcn gco gcs ge- gec gee geg gek gen geo ges ggc ggg ggn ggo ggs gkn gko gks gnc gne gnn gno gns goc goe gog gok gon goo gos gsc gse gsg gsk gsn gso gss kcc kce kcg kck kcn kcs ke- kec kee keg kek ken keo kes kgc kgo kgs kkc kke kkk kkn kks kn- knc kne kng knk knn kno koc koe kog kok kon koo kos ksc kse ksg ksk ksn kso kss ncc nce ncg nck ncn nco ncs ne- nec nee neg nek nen neo nes ngc nge ngg ngk ngn ngo ngs nkc nke nkk nkn nko nks nnc nne nng nnk nnn nno nns no- noc noe nog nok non noo nos nsc nse nsg nsk nsn nso nss oc- occ ocg ock ocn oco ocs oec oee oeg oen oeo oes ogc oge ogg ogn ogo ogs okc oke okg okk oko oks on- onc one ong onk onn ono ons oo- ooc oog ook oon ooo oos os- osc ose osg osk osn oso oss scc sce scg sck scn sco scs se- sec see seg sek sen seo ses sgc sge sgg sgk sgn sgo sgs sk- skc ske skg skk sko sks snc sne sng snk snn sno sns soc soe sog sok son soo sos ss- ssc sse ssg ssk ssn sso sss