c-- ccc ccn cco ccs cct cn- cnc cnn cno cns cnt cny co- coc con coo cos cot coy csc csn cso css cst csy ctc ctn cto cts ctt cty cyc cyn cyo cys cyt ncc ncn nco ncs nct nnc nnn nno nns nnt no- noc non noo nos not noy nsc nsn nso nss nst nsy ntc ntn nto nts ntt nyc nyn nyo nys nyt nyy oc- occ ocn oco ocs oct on- onc onn ono ons ont ony oo- ooc oon ooo oos oot os- osc osn oso oss ost ot- otc otn oto ots ott oyo oys scc scn sco scs sct snc snn sno sns snt sny soc son soo sos sot soy ss- ssc ssn sso sss sst stc stn sto sts stt sty sy- syc syn sys syt tcc tcn tco tcs tct tnc tnn tno tns tnt to- toc ton too tos tot toy tsc tsn tso tss tst tsy ttc ttn tto tts ttt tty tyc tyn tyo tys tyt ycc yco ycs ycy ynn yns yny yoc yon yoo yos yot yoy ysc yso yss yst ysy ytc ytn yto yts ytt yyc yys yyt yyy