-ey c-- ccc cce cck cco ccs cct ce- cec cee cek ceo ces cet cey ckc cko cks ckt cky co- coc coe cok coo cos cot coy csc cse csk cso css cst csy ctc cte ctk cto cts ctt cty cyc cye cyk cyo cys cyt ec- ecc ece eck eco ecs ect eec eee eek eeo ees eet eey ekc eke eko eks ekt eky eo- eoc eoe eok eoo eos eot es- esc ese esk eso ess est esy etc ete etk eto ets ett ety eyc eye eyo eys eyt k-t kcc kce kck kcs kct ke- kec kee kek keo kes ket key kkc kke kkk kks kkt kky koc koe kok koo kos kot koy ksc kse ksk kso kss kst ktc kte ktk kto kts ktt kyc kye kyo kys kyt oc- occ ock oco ocs oct oec oee oeo oes oet oey okc oke okk oko oks oo- ooc ook ooo oos oot os- osc ose osk oso oss ost ot- otc ote otk oto ots ott oye oyo oys scc sce sck sco scs sct se- sec see sek seo ses set sey sk- skc ske skk sko sks skt sky soc soe sok soo sos sot soy ss- ssc sse ssk sso sss sst stc ste stk sto sts stt sty sy- syc sye syk sys syt tcc tce tck tco tcs tct te- tec tee tek teo tes tet tey tkc tke tkk tko tks tkt tky to- toc toe tok too tos tot toy tsc tse tsk tso tss tst tsy ttc tte ttk tto tts ttt tty tyc tye tyo tys tyt ycc yce yco ycs ycy yec yee yek yeo yes yet yey ykk yoc yoe yok yoo yos yot yoy ysc yse ysk yso yss yst ysy ytc yte ytk yto yts ytt yyc yye yys yyt yyy