b-r-k bbook bjork bo-bo bobko bobok bobr bokko bokok bokor booko booru borbo borko borku boro- borok boroo borou borro bouko brobo brook brouk brrrr brujo bujor bujru bukk- bukor buroo burro burru buruk jouko ju-ju jubur juror juruk juuru k-rob ko-ko kobru kobuk kojur kokko kokor kokou kokur kooru korbo korju korku koror korro koruj koruk kubok kujur kukko kukok kukur kurbu kurku kuruk o-r-b oboro obrok ojuju okkur okobo okoro okubo okuku okuru ooooo orobo orujo oruku oruro ouoro ro-ro robbo robo- robor robur rokkk rorbu rouko rubor ubobo ukobu uroob urooj urour urubu uuork uuuuu