bbb bbd bbk bbn bbo bby bdb bdd bdk bdo bdy bkb bkk bkn bko bnb bnd bnk bnn bno bob bod bok bon boo boy by- byd byk byn byo dbb dbd dbk dbn dbo dby ddb ddd ddk ddn ddo ddy dkb dkk dko dnb dnd dnk dnn dno dny dob dod dok don doo doy dy- dyb dyd dyk dyn dyo dyy kbb kbd kbk kbn kbo kdb kdk kdo kdy kkb kkk kkn kky kn- knd knk knn kno kob kod kok kon koo koy kyd kyn kyo nbb nbd nbk nbn nbo ndb ndd ndk ndn ndo ndy nkk nkn nko nky nnb nnk nnn nno no- nob nod nok non noo noy nyd nyk nyn nyo nyy ob- obb obd obk obn obo oby odb odd odn odo okb okd okk oko on- onb ond onk onn ono ony oo- oob ood ook oon ooo oyd oyo yby ydn ydo ydy ykk ykn ynd ynk ynn yny yob yod yok yon yoo yoy yyb yyy