-ey c-- ccc cce cck cco ccs ce- cec cee cek ceo ces cey ckc cko cks cky co- coc coe cok coo cos coy csc cse csk cso css csy cyc cye cyk cyo cys ec- ecc ece eck eco ecs eec eee eek eeo ees eey ekc eke eko eks eky eo- eoc eoe eok eoo eos es- esc ese esk eso ess esy eyc eye eyo eys kcc kce kck kcs ke- kec kee kek keo kes key kkc kke kkk kks kky koc koe kok koo kos koy ksc kse ksk kso kss kyc kye kyo kys oc- occ ock oco ocs oec oee oeo oes oey okc oke okk oko oks oo- ooc ook ooo oos os- osc ose osk oso oss oye oyo oys scc sce sck sco scs se- sec see sek seo ses sey sk- skc ske skk sko sks sky soc soe sok soo sos soy ss- ssc sse ssk sso sss sy- syc sye syk sys ycc yce yco ycs ycy yec yee yek yeo yes yey ykk yoc yoe yok yoo yos yoy ysc yse ysk yso yss ysy yyc yye yys yyy