bbbb bbdd bbdo bd-r bnor bnrr bobb bobo bodb bodo bond bonn bono boob bood boon boor bor- bord born boro borr brdo brno brob brod bron broo bror brrr d-bo dbrn dddd dobb dod- dodd dodo dond donn dono donr doob dood doon door dord dorn doro dorr drno drob drod dron nbbo nddb nddo ndor nndb nnnn nobo nodo non- nonn nono noo- noob noon nooo noor nor- norb nord norn noro norr nron nrrd obbo obon obor obro odbo oddd odnb odon odoo odor ondo onno onod onon onor oooo oord orbb orbo ordn ordo orno oro- oron oror orro rbbb rbbr rnbr rnod rob- robb robo rodd rodo rond rono roob rood roon roor roro rrrr