c-- ccc cce cck ccn ccs ccv ce- cec cee cek cen ces cev ckc cks cn- cnc cne cnn cns cnv csc cse csk csn css csv cvc cve cvk cvn cvs cvv ec- ecc ece eck ecn ecs ecv eec eee eek een ees eev ekc eke eks ekv en- enc ene enk enn ens env es- esc ese esk esn ess esv evc eve evn evs evv kcc kce kck kcn kcs ke- kec kee kek ken kes kev kkc kke kkk kkn kks kkv kn- knc kne knk knn ksc kse ksk ksn kss ksv kvk kvn kvs kvv ncc nce nck ncn ncs ncv ne- nec nee nek nen nes nev nkc nke nkk nkn nks nnc nne nnk nnn nns nnv nsc nse nsk nsn nss nsv nvc nve nvk nvn nvv scc sce sck scn scs scv se- sec see sek sen ses sev sk- skc ske skk sks snc sne snk snn sns snv ss- ssc sse ssk ssn sss ssv svc sve svk svn svs svv v-e vcc vce vcn vcs vec vee vek ven ves vn- vns vnv vsc vse vsk vsn vss vsv vvc vvs vvv