c-- ccc cck ccn cco ccr ccz ckc cko cky cn- cnc cnn cno cnr cny co- coc cok con coo cor coy coz crc crk crn cro crr cry crz cyc cyk cyn cyo cyr cz- czc czk czo k-z kcc kck kcn kcr kkc kkk kkn kkr kky kn- knc knk knn kno knr koc kok kon koo kor koy koz krc krk krn kro krr kry kyc kyn kyo kyr kyz kzo kzy ncc nck ncn nco ncr nkc nkk nkn nko nkr nky nnc nnk nnn nno nnz no- noc nok non noo nor noy noz nrc nrk nrn nro nrr nry nrz nyc nyk nyn nyo nyy nzo nzz oc- occ ock ocn oco ocr ocz okc okk oko okr on- onc onk onn ono onr ony oo- ooc ook oon ooo oor or- orc ork orn oro orr ory orz oyo ozo ozz rcc rcn rco rcr rkc rkk rko rky rkz rnc rnn rno rnr rny rnz roc rok ron roo ror roy roz rrc rrk rrn rrr ry- ryc ryk ryn ryo ryr ryy ryz rzo rzy ycc yco ycy ykk ykn ynk ynn yny yoc yok yon yoo yor yoy yrc yrn yro yyc yyy yyz yzr yzy zco znc znn zno zo- zoc zok zon zoo zor zro zzr zzy zzz