bbbb bbdd bbdo bd-r bnor bnrr bobb bobo bodb bodo bokn boko bond bonk bonn bono boob bood book boon boor bor- bord bork born boro borr brdo brkb brno brob brod brok bron broo bror brrr d-bo dbrn dddd dobb dod- dodd dodo doko dond donk donn dono donr doob dood dook doon door dord dork dorn doro dorr drno drob drod dron kbbb kbbd kbbk kbbo kbbr kbdb kbdn kbdo kbdr kbkb kbkk kbko kbkr kbnd kbnn kbno kbnr kbob kbod kbok kbon kboo kbrb kbrd kbrk kbrn kbro kdbb kdbn kdbr kddb kddd kddk kddr kdkb kdkd kdkk kdkn kdko kdkr kdnd kdnk kdnn kdno kdnr kdok kdrb kdro kkbb kkbd kkbn kkbo kkbr kkdd kkdo kkkk kknb kknd kknn kkno kkob kkon kkoo kkor kkrb kkrk kkrn kkro kkrr knbb knbn knbr kndb kndd kndk kndn kndo kndr knkk knnb knnd knnk knnr knob knod knok knon knor knrb knrk knro kobb kobk kobn kobo kobr kodk kodo kokb kokk kokn koko kokr kond konk kono koob kook koon kooo koor korb kord kork korn koro korr krbb krbd krbk krbr krdd krdo krdr krkd krkk krkn krko krkr krnb krnd krnk krnn krno krob krod krok kroo kror krrb krrk krrn krro krrr nbbo nddb nddo ndor nkok nkor nndb nnnn nobo nodo noko non- nonn nono noo- noob nook noon nooo noor nor- norb nord nork norn noro norr nron nrrd obbo obkb obok obon obor obro odbo oddd odnb odon odoo odor okko okno okok okon okor okro ondo onno onod onon onor oooo oord orbb orbo ordn ordo orko orno oro- orok oron oror orro rbbb rbbr rnbr rnod rob- robb robo rodd rodo rokk roko rokr rond ronk rono roob rood rook roon roor rork roro rrrr