c-- ccc cch cck ccn cco ccs ch- chc chh chk chn cho chs ckc ckh cko cks cn- cnc cnh cnn cno cns co- coc coh cok con coo cos csc csh csk csn cso css hcc hch hck hcn hco hcs hhc hhh hhk hhn hho hhs hkh hkk hkn hko hks hnc hnh hnk hnn hno hns hoc hoh hok hon hoo hos hsc hsh hsk hsn hss kcc kch kck kcn kcs khh khk khn kho khs kkc kkh kkk kkn kks kn- knc knk knn kno koc koh kok kon koo kos ksc ksh ksk ksn kso kss ncc nch nck ncn nco ncs nhc nhh nhk nhn nhs nkc nkk nkn nko nks nnc nnh nnk nnn nno nns no- noc noh nok non noo nos nsc nsh nsk nsn nso nss oc- occ och ock ocn oco ocs ohc ohh ohn oho ohs okc okk oko oks on- onc onh onk onn ono ons oo- ooc ooh ook oon ooo oos os- osc osh osk osn oso oss scc sch sck scn sco scs sh- shc shh shk shn sho shs sk- skc skh skk sko sks snc snk snn sno sns soc soh sok son soo sos ss- ssc ssh ssk ssn sso sss