b-r-k bbook bhook bhoot bhour bo-bo bo-ho bobko bobok bobr bohok bohor bohot bokko bokok bokor booko boort booru booth borbo borko borku boro- borok boroo borot borou borro borth borut botok botou botro bottu bouko bouth bouto brobo brook broth broto brouk brout brrrr btr-t bukk- bukor buoho buroo burro burru burtt buruk burut butko buto- butoh butor butot butou butuo butut hhhhh hhour ho-ho ho-oh hobor hobro hobub hohot hokku hookt hoort horro horru horth horto hothr hotot hotto houtu hthrt hubur huhuh hukok huork hurko hurok hurtt hurtu hutor hutto huttu huuru k-rob k-t-b khoku khoro khour khuru khutu khuur ko-ko kobru kobuk kohut kokko kokor kokot kokou kokur kokut kooru korbo korku koror korro korth kortu koruk kotor kotto kottu kotur kouth kouto kroot krout krtok kruth kruto kubok kukko kukok kukur kurbu kurku kurth kuruk kutho kutkh kutob kuttu kutur o-r-b obhor oboro oboth obout obrok oh-oh oh-ok ohbot ohour ohrob ohrot okbut okkur okobo okoho okoro okrut okubo okuku okuru ooooh ooooo orbot orkut orobo orout orth- ortho ortok ortoo oruku oruro orutu othou othur otoku ototo otour otrok ottur oubut ouoro outro outto ro-ro robbo robo- robor robot robrt robur rohob rohru rokkk rokot rokto rookh rorbu rotho rotko roto- rotor rotot rotto roubt rouko routh routt rt-rk rubor ruhub ruthu ruuth ruutu t-hub tbtbt tbutt thoro thorr thort thoru thoth thour thout throb throo throt throu thrub thurt thuru to-ho tobor tobot tobou tohku tohot tokko toko- tokor tokuo tokur tookh tooth torht torob torok torro torto tortu toto- totok totoo touho touro trbuk troth trott trout trubu truro truth ttttt tubo- tubou tukur tuotu turbo turbt turko turku turok turot turro turtu turut tutku tutor tutto tuuru ubobo uh-oh uh-uh uhhoh uhhuh uhuru ukobu urkut uroob urour urubu urutu utkhu utro- utror uttur uturu ututo uuork uuuuu