c-- ccc cck cco ccr ccu ccz ckc cko cky co- coc cok coo cor cou coy coz crc crk cro crr cru cry crz cuc cuk cuo cur cuu cuy cuz cyc cyk cyo cyr cz- czc czk czo k-z kcc kck kcr kcu kkc kkk kkr kku kky koc kok koo kor kou koy koz krc krk kro krr kru kry kuc kuk kur kuu kuy kyc kyo kyr kyu kyz kzo kzy oc- occ ock oco ocr ocu ocz okc okk oko okr oku oo- ooc ook ooo oor or- orc ork oro orr oru ory orz ou- ouc ouk ouo our oyo ozo ozu ozz rcc rco rcr rcu rkc rkk rko rku rky rkz roc rok roo ror rou roy roz rrc rrk rrr rru ruc ruk ruo rur ruu ruy ruz ry- ryc ryk ryo ryr ryu ryy ryz rzo rzy ucc uck uco ucr ucu ukc ukk ukr uku ukz uoc uok uoo uor ur- urc urk uro urr uru ury urz uuc uur uuu uyc uyo uyu uzo uzu ycc yco ycu ycy ykk yoc yok yoo yor you yoy yrc yro yru yuk yuo yur yuu yuy yyc yyu yyy yyz yzr yzu yzy zco zo- zoc zok zoo zor zou zro zuc zuk zur zuz zzr zzy zzz