c-- ccc cch cck cco ccr ccu ch- chc chh chk cho chr chu ckc ckh cko co- coc coh cok coo cor cou crc crh crk cro crr cru cuc cuh cuk cuo cur cuu hcc hch hck hco hcr hhc hhh hhk hho hhr hhu hkh hkk hko hkr hku hoc hoh hok hoo hor hou hr- hrc hrh hrk hro hrr hru huc huh huk huo hur huu kcc kch kck kcr kcu khh khk kho khr khu kkc kkh kkk kkr kku koc koh kok koo kor kou krc krk kro krr kru kuc kuh kuk kur kuu oc- occ och ock oco ocr ocu ohc ohh oho ohr ohu okc okk oko okr oku oo- ooc ooh ook ooo oor or- orc orh ork oro orr oru ou- ouc ouh ouk ouo our rcc rch rco rcr rcu rh- rhc rhh rho rhr rhu rkc rkk rko rku roc roh rok roo ror rou rrc rrh rrk rrr rru ruc ruh ruk ruo rur ruu ucc uch uck uco ucr ucu uhc uhh uho uhr uhu ukc ukk ukr uku uoc uok uoo uor ur- urc urk uro urr uru uuc uur uuu