bbb bbc bbd bbn bbo bby bcb bcc bcd bcn bco bcy bdb bdc bdd bdo bdy bnb bnc bnd bnn bno bob boc bod bon boo boy by- byc byd byn byo c-- cbb cbc cbd cbn cbo cby ccb ccc ccd ccn cco cdb cdc cdd cdn cdo cdy cn- cnb cnc cnd cnn cno cny co- cob coc cod con coo coy cyb cyc cyd cyn cyo dbb dbc dbd dbn dbo dby dcb dcc dcd dcn dco ddb ddc ddd ddn ddo ddy dnb dnc dnd dnn dno dny dob doc dod don doo doy dy- dyb dyc dyd dyn dyo dyy nbb nbc nbd nbn nbo ncb ncc ncd ncn nco ndb ndc ndd ndn ndo ndy nnb nnc nnn nno no- nob noc nod non noo noy nyc nyd nyn nyo nyy ob- obb obc obd obn obo oby oc- ocb occ ocd ocn oco odb odc odd odn odo on- onb onc ond onn ono ony oo- oob ooc ood oon ooo oyd oyo ybc yby ycc ycd yco ycy ydn ydo ydy ynd ynn yny yob yoc yod yon yoo yoy yyb yyc yyy