bbb bbc bbd bbk bbn bbo bby bcb bcc bcd bck bcn bco bcy bdb bdc bdd bdk bdo bdy bkb bkc bkk bkn bko bnb bnc bnd bnk bnn bno bob boc bod bok bon boo boy by- byc byd byk byn byo c-- cbb cbc cbd cbk cbn cbo cby ccb ccc ccd cck ccn cco cdb cdc cdd cdk cdn cdo cdy ckb ckc ckd cko cky cn- cnb cnc cnd cnn cno cny co- cob coc cod cok con coo coy cyb cyc cyd cyk cyn cyo dbb dbc dbd dbk dbn dbo dby dcb dcc dcd dck dcn dco ddb ddc ddd ddk ddn ddo ddy dkb dkc dkk dko dnb dnc dnd dnk dnn dno dny dob doc dod dok don doo doy dy- dyb dyc dyd dyk dyn dyo dyy kbb kbc kbd kbk kbn kbo kcb kcc kcd kck kcn kdb kdc kdk kdo kdy kkb kkc kkk kkn kky kn- knc knd knk knn kno kob koc kod kok kon koo koy kyc kyd kyn kyo nbb nbc nbd nbk nbn nbo ncb ncc ncd nck ncn nco ndb ndc ndd ndk ndn ndo ndy nkc nkk nkn nko nky nnb nnc nnk nnn nno no- nob noc nod nok non noo noy nyc nyd nyk nyn nyo nyy ob- obb obc obd obk obn obo oby oc- ocb occ ocd ock ocn oco odb odc odd odn odo okb okc okd okk oko on- onb onc ond onk onn ono ony oo- oob ooc ood ook oon ooo oyd oyo ybc yby ycc ycd yco ycy ydn ydo ydy ykk ykn ynd ynk ynn yny yob yoc yod yok yon yoo yoy yyb yyc yyy