c-- ccc cck ccn cco ccr ccs ckc cko cks cky cn- cnc cnn cno cnr cns cny co- coc cok con coo cor cos coy crc crk crn cro crr crs cry csc csk csn cso csr css csy cyc cyk cyn cyo cyr cys kcc kck kcn kcr kcs kkc kkk kkn kkr kks kky kn- knc knk knn kno knr koc kok kon koo kor kos koy krc krk krn kro krr krs kry ksc ksk ksn kso ksr kss kyc kyn kyo kyr kys ncc nck ncn nco ncr ncs nkc nkk nkn nko nkr nks nky nnc nnk nnn nno nns no- noc nok non noo nor nos noy nrc nrk nrn nro nrr nrs nry nsc nsk nsn nso nsr nss nsy nyc nyk nyn nyo nys nyy oc- occ ock ocn oco ocr ocs okc okk oko okr oks on- onc onk onn ono onr ons ony oo- ooc ook oon ooo oor oos or- orc ork orn oro orr ors ory os- osc osk osn oso osr oss oyo oys rcc rcn rco rcr rcs rkc rkk rko rks rky rnc rnn rno rnr rns rny roc rok ron roo ror ros roy rrc rrk rrn rrr rrs rsc rsk rsn rso rsr rss ry- ryc ryk ryn ryo ryr rys ryy scc sck scn sco scr scs sk- skc skk sko skr sks sky snc snk snn sno snr sns sny soc sok son soo sor sos soy sr- src srk srn sro srr srs sry ss- ssc ssk ssn sso ssr sss sy- syc syk syn syr sys ycc yco ycs ycy ykk ykn ynk ynn yns yny yoc yok yon yoo yor yos yoy yrc yrn yro yrs ysc ysk yso ysr yss ysy yyc yys yyy