c-- ccc ccd ccn cco ccs cdc cdd cdn cdo cds cdy cn- cnc cnd cnn cno cns cny co- coc cod con coo cos coy csc csd csn cso css csy cyc cyd cyn cyo cys dcc dcd dcn dco dcs ddc ddd ddn ddo dds ddy dnc dnd dnn dno dns dny doc dod don doo dos doy dsc dsd dsn dso dss dsy dy- dyc dyd dyn dyo dys dyy ncc ncd ncn nco ncs ndc ndd ndn ndo nds ndy nnc nnn nno nns no- noc nod non noo nos noy nsc nsd nsn nso nss nsy nyc nyd nyn nyo nys nyy oc- occ ocd ocn oco ocs odc odd odn odo ods on- onc ond onn ono ons ony oo- ooc ood oon ooo oos os- osc osd osn oso oss oyd oyo oys scc scd scn sco scs sdc sdd sdn sdo sds sdy snc snd snn sno sns sny soc sod son soo sos soy ss- ssc ssd ssn sso sss sy- syc syd syn sys ycc ycd yco ycs ycy ydn ydo yds ydy ynd ynn yns yny yoc yod yon yoo yos yoy ysc yso yss ysy yyc yys yyy