c-- ccc ccd cch cck cco ccr cdc cdd cdh cdk cdo cdr cdy ch- chc chd chh chk cho chr chy ckc ckd ckh cko cky co- coc cod coh cok coo cor coy crc crd crh crk cro crr cry cyc cyd cyk cyo cyr dcc dcd dck dco dcr ddc ddd ddh ddk ddo ddr ddy dh- dhc dhd dhh dhk dho dhr dkc dkk dko dkr doc dod doh dok doo dor doy drc drd drk dro drr dry dy- dyc dyd dyk dyo dyr dyy hcc hcd hch hck hco hcr hcy hdc hdd hdh hdk hdo hdr hdy hhc hhd hhh hhk hho hhr hhy hkd hkh hkk hko hkr hoc hod hoh hok hoo hor hoy hr- hrc hrd hrh hrk hro hrr hy- hyc hyd hyh hyo hyr hyy kcc kcd kch kck kcr kdc kdh kdk kdo kdr kdy khh khk kho khr kkc kkh kkk kkr kky koc kod koh kok koo kor koy krc krd krk kro krr kry kyc kyd kyo kyr oc- occ ocd och ock oco ocr odc odd odh odo odr ohc ohd ohh oho ohr okc okd okk oko okr oo- ooc ood ooh ook ooo oor or- orc ord orh ork oro orr ory oyd oyo rcc rcd rch rco rcr rdc rdd rdh rdo rdr rdy rh- rhc rhd rhh rho rhr rkc rkk rko rky roc rod roh rok roo ror roy rrc rrd rrh rrk rrr ry- ryc ryd ryk ryo ryr ryy ycc ycd ych yco ycy ydo ydy yhc ykk yoc yod yok yoo yor yoy yrc yro yyc yyy