-ey c-- ccc cce ccf cck cco ce- cec cee cef cek ceo cey cfc cfe cff cfk cfo ckc cko cky co- coc coe cof cok coo coy cyc cye cyf cyk cyo ec- ecc ece ecf eck eco eec eee eef eek eeo eey ef- efc efe eff efo ekc eke ekf eko eky eo- eoc eoe eof eok eoo eyc eye eyo fcc fce fcf fck fco fcy fec fee fef fek feo fey ffc ffe fff ffk ffo ffy fkc fkf fkk foc foe fof fok foo foy fy- fyc fye fyk fyo kcc kce kck ke- kec kee kef kek keo key kfc kff kfo kkc kke kkk kky koc koe kof kok koo koy kyc kye kyo oc- occ ocf ock oco oec oee oef oeo oey of- ofc ofe off ofo okc oke okk oko oo- ooc oof ook ooo oye oyo ycc yce ycf yco ycy yec yee yef yek yeo yey yfc yfe yff ykk yoc yoe yof yok yoo yoy yyc yye yyf yyy