c-- ccc cch cck cco ccp ccr ch- chc chh chk cho chp chr ckc ckh cko co- coc coh cok coo cop cor cpc cph cpk cpo cpp cpr crc crh crk cro crp crr hcc hch hck hco hcp hcr hhc hhh hhk hho hhp hhr hkh hkk hko hkp hkr hoc hoh hok hoo hop hor hpc hph hpk hpo hpp hpr hr- hrc hrh hrk hro hrp hrr kcc kch kck kcp kcr khh khk kho khr kkc kkh kkk kkp kkr koc koh kok koo kop kor kpc kph kpk kpo kpp kpr krc krk kro krp krr oc- occ och ock oco ocp ocr ohc ohh oho ohp ohr okc okk oko okp okr oo- ooc ooh ook ooo oop oor op- opc oph opk opo opp opr or- orc orh ork oro orp orr p-p pcc pch pck pco pcp pcr phc phk pho php phr pkc pko pkp pkr poc poh pok poo pop por ppc pph ppk ppo ppp ppr prc prh prk pro prp prr rcc rch rco rcp rcr rh- rhc rhh rho rhp rhr rkc rkk rko rkp roc roh rok roo rop ror rpc rph rpk rpo rpp rpr rrc rrh rrk rrp rrr