c-- ccc cch cck cco ccs ch- chc chh chk cho chs chy ckc ckh cko cks cky co- coc coh cok coo cos coy csc csh csk cso css csy cyc cyk cyo cys hcc hch hck hco hcs hcy hhc hhh hhk hho hhs hhy hkh hkk hko hks hoc hoh hok hoo hos hoy hsc hsh hsk hss hsy hy- hyc hyh hyo hys hyy kcc kch kck kcs khh khk kho khs kkc kkh kkk kks kky koc koh kok koo kos koy ksc ksh ksk kso kss kyc kyo kys oc- occ och ock oco ocs ohc ohh oho ohs okc okk oko oks oo- ooc ooh ook ooo oos os- osc osh osk oso oss oyo oys scc sch sck sco scs sh- shc shh shk sho shs shy sk- skc skh skk sko sks sky soc soh sok soo sos soy ss- ssc ssh ssk sso sss sy- syc syh syk sys ycc ych yco ycs ycy yhc yhs ykk yoc yok yoo yos yoy ysc ysk yso yss ysy yyc yys yyy