c-- ccc ccn cco ccs cn- cnc cnn cno cns cny co- coc con coo cos coy csc csn cso css csy cyc cyn cyo cys ncc ncn nco ncs nnc nnn nno nns no- noc non noo nos noy nsc nsn nso nss nsy nyc nyn nyo nys nyy oc- occ ocn oco ocs on- onc onn ono ons ony oo- ooc oon ooo oos os- osc osn oso oss oyo oys scc scn sco scs snc snn sno sns sny soc son soo sos soy ss- ssc ssn sso sss sy- syc syn sys ycc yco ycs ycy ynn yns yny yoc yon yoo yos yoy ysc yso yss ysy yyc yys yyy