-ey c-- ccc cce cck cco ccs ccv ce- cec cee cek ceo ces cev cey ckc cko cks cky co- coc coe cok coo cos cov coy csc cse csk cso css csv csy cvc cve cvk cvo cvs cvv cyc cye cyk cyo cys ec- ecc ece eck eco ecs ecv eec eee eek eeo ees eev eey ekc eke eko eks ekv eky eo- eoc eoe eok eoo eos es- esc ese esk eso ess esv esy evc eve evo evs evv evy eyc eye eyo eys kcc kce kck kcs ke- kec kee kek keo kes kev key kkc kke kkk kks kkv kky koc koe kok koo kos koy ksc kse ksk kso kss ksv kvk kvo kvs kvv kyc kye kyo kys oc- occ ock oco ocs ocv oec oee oeo oes oey okc oke okk oko oks oo- ooc ook ooo oos oov os- osc ose osk oso oss osv ov- ovc ove ovo ovs ovv oye oyo oys scc sce sck sco scs scv se- sec see sek seo ses sev sey sk- skc ske skk sko sks sky soc soe sok soo sos sov soy ss- ssc sse ssk sso sss ssv svc sve svk svo svs svv svy sy- syc sye syk sys v-e vcc vce vco vcs vcy vec vee vek veo ves vey voc voe vok voo vos vov voy vsc vse vsk vso vss vsv vvc vvo vvs vvv vye ycc yce yco ycs ycv ycy yec yee yek yeo yes yev yey ykk yoc yoe yok yoo yos yoy ysc yse ysk yso yss ysy yve yvo yvy yyc yye yys yyy