c-- ccc ccn cco ccr ccs cn- cnc cnn cno cnr cns cny co- coc con coo cor cos coy crc crn cro crr crs cry csc csn cso csr css csy cyc cyn cyo cyr cys ncc ncn nco ncr ncs nnc nnn nno nns no- noc non noo nor nos noy nrc nrn nro nrr nrs nry nsc nsn nso nsr nss nsy nyc nyn nyo nys nyy oc- occ ocn oco ocr ocs on- onc onn ono onr ons ony oo- ooc oon ooo oor oos or- orc orn oro orr ors ory os- osc osn oso osr oss oyo oys rcc rcn rco rcr rcs rnc rnn rno rnr rns rny roc ron roo ror ros roy rrc rrn rrr rrs rsc rsn rso rsr rss ry- ryc ryn ryo ryr rys ryy scc scn sco scr scs snc snn sno snr sns sny soc son soo sor sos soy sr- src srn sro srr srs sry ss- ssc ssn sso ssr sss sy- syc syn syr sys ycc yco ycs ycy ynn yns yny yoc yon yoo yor yos yoy yrc yrn yro yrs ysc yso ysr yss ysy yyc yys yyy