c-- ccc cch cck cco ccp ccs ch- chc chh chk cho chp chs ckc ckh cko cks co- coc coh cok coo cop cos cpc cph cpk cpo cpp cps csc csh csk cso csp css hcc hch hck hco hcp hcs hhc hhh hhk hho hhp hhs hkh hkk hko hkp hks hoc hoh hok hoo hop hos hpc hph hpk hpo hpp hps hsc hsh hsk hsp hss kcc kch kck kcp kcs khh khk kho khs kkc kkh kkk kkp kks koc koh kok koo kop kos kpc kph kpk kpo kpp kps ksc ksh ksk kso ksp kss oc- occ och ock oco ocp ocs ohc ohh oho ohp ohs okc okk oko okp oks oo- ooc ooh ook ooo oop oos op- opc oph opk opo opp ops os- osc osh osk oso osp oss p-p pcc pch pck pco pcp pcs phc phk pho php phs pkc pko pkp pks poc poh pok poo pop pos ppc pph ppk ppo ppp pps ps- psc psh psk pso psp pss scc sch sck sco scp scs sh- shc shh shk sho shp shs sk- skc skh skk sko skp sks soc soh sok soo sop sos spc sph spk spo spp sps ss- ssc ssh ssk sso ssp sss