c-- ccc ccd ccf cch cck cco cdc cdd cdf cdh cdk cdo cdy cfc cfd cff cfh cfk cfo ch- chc chd chf chh chk cho chy ckc ckd ckh cko cky co- coc cod cof coh cok coo coy cyc cyd cyf cyk cyo dcc dcd dcf dck dco ddc ddd ddf ddh ddk ddo ddy dfc dfd dff dfh dfk dfo dh- dhc dhd dhf dhh dhk dho dkc dkk dko doc dod dof doh dok doo doy dy- dyc dyd dyk dyo dyy fcc fcd fcf fck fco fcy fdc fdd fdf fdh fdk fdo ffc ffd fff ffh ffk ffo ffy fhc fhf fhh fho fkc fkf fkk foc fof foh fok foo foy fy- fyc fyk fyo hcc hcd hcf hch hck hco hcy hdc hdd hdf hdh hdk hdo hdy hfc hfd hff hfh hfk hfo hfy hhc hhd hhf hhh hhk hho hhy hkd hkf hkh hkk hko hoc hod hof hoh hok hoo hoy hy- hyc hyd hyh hyo hyy kcc kcd kch kck kdc kdf kdh kdk kdo kdy kfc kfd kff kfh kfo khf khh khk kho kkc kkh kkk kky koc kod kof koh kok koo koy kyc kyd kyo oc- occ ocd ocf och ock oco odc odd odf odh odo of- ofc ofd off ofo ohc ohd ohf ohh oho okc okd okk oko oo- ooc ood oof ooh ook ooo oyd oyo ycc ycd ycf ych yco ycy ydo ydy yfc yfd yff yhc ykk yoc yod yof yok yoo yoy yyc yyf yyy