c-- ccc cch cck ccs ch- chc chh chk chs chy ckc ckh cks cky csc csh csk css csy cyc cyk cys hcc hch hck hcs hcy hhc hhh hhk hhs hhy hkh hkk hks hsc hsh hsk hss hsy hy- hyc hyh hys hyy kcc kch kck kcs khh khk khs kkc kkh kkk kks kky ksc ksh ksk kss kyc kys scc sch sck scs sh- shc shh shk shs shy sk- skc skh skk sks sky ss- ssc ssh ssk sss sy- syc syh syk sys ycc ych ycs ycy yhc yhs ykk ysc ysk yss ysy yyc yys yyy