c-- ccc cch cck cco ccs ccu ch- chc chh chk cho chs chu ckc ckh cko cks co- coc coh cok coo cos cou csc csh csk cso css csu cuc cuh cuk cuo cus cuu hcc hch hck hco hcs hhc hhh hhk hho hhs hhu hkh hkk hko hks hku hoc hoh hok hoo hos hou hsc hsh hsk hss hsu huc huh huk huo hus huu kcc kch kck kcs kcu khh khk kho khs khu kkc kkh kkk kks kku koc koh kok koo kos kou ksc ksh ksk kso kss ksu kuc kuh kuk kus kuu oc- occ och ock oco ocs ocu ohc ohh oho ohs ohu okc okk oko oks oku oo- ooc ooh ook ooo oos os- osc osh osk oso oss osu ou- ouc ouh ouk ouo ous scc sch sck sco scs scu sh- shc shh shk sho shs shu sk- skc skh skk sko sks sku soc soh sok soo sos sou ss- ssc ssh ssk sso sss ssu suc suh suk suo sus suu ucc uch uck uco ucs ucu uhc uhh uho uhs uhu ukc ukk uku uoc uok uoo uos usc ush usk uso uss usu uuc uus uuu