c-- ccc cch cck cco ccs ccv ch- chc chh chk cho chs chv chy ckc ckh cko cks cky co- coc coh cok coo cos cov coy csc csh csk cso css csv csy cvc cvh cvk cvo cvs cvv cyc cyk cyo cys hcc hch hck hco hcs hcv hcy hhc hhh hhk hho hhs hhv hhy hkh hkk hko hks hoc hoh hok hoo hos hov hoy hsc hsh hsk hss hsv hsy hv- hvc hvk hvo hvs hvv hvy hy- hyc hyh hyo hys hyv hyy kcc kch kck kcs khh khk kho khs khv kkc kkh kkk kks kkv kky koc koh kok koo kos koy ksc ksh ksk kso kss ksv kvh kvk kvo kvs kvv kyc kyo kys oc- occ och ock oco ocs ocv ohc ohh oho ohs okc okk oko oks oo- ooc ooh ook ooo oos oov os- osc osh osk oso oss osv ov- ovc ovh ovo ovs ovv oyo oys scc sch sck sco scs scv sh- shc shh shk sho shs shv shy sk- skc skh skk sko sks sky soc soh sok soo sos sov soy ss- ssc ssh ssk sso sss ssv svc svk svo svs svv svy sy- syc syh syk sys vcc vch vco vcs vcy vh- vhc vho vhs voc voh vok voo vos vov voy vsc vsh vsk vso vss vsv vvc vvo vvs vvv ycc ych yco ycs ycv ycy yhc yhs ykk yoc yok yoo yos yoy ysc ysk yso yss ysy yvo yvy yyc yys yyy