b-r-k bbook bcock bo-bo bobko boboc bobok bobr bocor bokko bokok bokor boock booco booko booru borbo borck borko borku boro- borok boroo borou borro bouck bouko brcko brobo brock brook brouk brrrr bruck bucco bucko bucku bucur bukk- bukor burck burcu buroo burro burru buruc buruk c-cor ccccc co-bo co-co cocc- cocco cocur cokk- corbo corbu coro- couco courb couru crock croco crook crouk cruck cruor cubo- cubub cucuk cukor cuoco curro k-rob ko-ko kobru kobuk kokko kokor kokou kokur kooru korbo korck korku koror korro koruk krock kubok kucuk kukko kukok kukur kurbu kurku kuruc kuruk o-r-b obock oboro obrok occur ockro ocr-b okkur okobo okoc okoro okubo okuku okuru ooooo orobo oroco oruku oruro ouoro r-co- ro-ro robbo robo- robor robur rocco rocko rocor rocou rokkk rorbu rouko rubor ubobo ukobu uroob urour urubu urucu uuork uuuuu