bbbb bbdd bbdo bblb bd-r bldr blno blob blod blon bloo bnor bnrr bobb bobo bodb bodo bold boll boln bolo bond bonn bono boob bood bool boon boor bor- bord born boro borr brdo brno brob brod brol bron broo bror brrr d-bo dbnl dbrn dddd dlbd dobb dobl dod- dodd dodo dold doll dolo dond donn dono donr doob dood dool doon door dord dorn doro dorr drno drob drod drol dron lblr lldb llll llod lloo lndn lob- lobb lobo lold loll lolo lond lono lonr loob lood lool loon loor lord lorn loro lrdd lron lrrr nbbo nddb nddo ndor nlrb nndb nnnn nobo nodo nold noll nolo non- nonn nono noo- noob nool noon nooo noor nor- norb nord norn noro norr nrlb nron nrrd nrrl obbo obol obon obor obro odbo oddd odnb odon odoo odor odrl olbo oldb oldn ollo olon olor ondo onno onod onon onor oold oolo oooo oord orbb orbo ordn ordo orlo orno oro- oron oror orro rbbb rbbr rnbr rnld rnod rob- robb robo rodd rodo rold roll rolo rond rono roob rood rool roon roor roro rrrr