b-r-k bbook blook bloor blorb blort bloto blott blout blurb blurr blurt bluto bo-bo bobko bobok bobr bokko bokok bokor bolko boll- bollo bollu bolok bolto boluk booko boort booru borbo borko borku boro- borok boroo borot borou borro borul borut botok botou botro bottu bouko boul- boulo boult bouto brobo broll brolo brook brool broto brouk brout brrrr brull btr-t bukk- bukor bulb- bull- bulok bulou bulto bulul bulut buolt burol buroo burro burru burtt buruk burut butko buto- butor butot butou butuo butut k-rob k-t-b kbool kloot klout ko-ko kobol kobru kobuk kobul kokko kokor kokot kokou kokur kokut kolbu kollo kollu kolob kolol kolot kolur kolut koolu kooru korbo korku korol koror korro kortu koruk kotor kotto kottu kotur koulo kouto kroll kroot krout krtok krull kruto kubok kubul kukko kukok kukur kullo kullu kulob kulor kulto kulul kulur kurbu kurku kurlu kuruk kutlu kutob kuttu kutur lobbo lobo- lobor lokot lokur lollo lolol loobu lookt loruk lorut lotor lotru lotto louro lubok lubur lukko lukok lukou lukut lulul lutol lutto o-r-b obolo oboro obout obrok okbut okkur okobo okoro okrut okubo okuku okuru ollur olotu olour ooooo orbot orkut orlok orobo orolu orout ortok ortoo oruku oruro orutu otoku otolo ototo otour otrok ottur otulu oubut oullo ouoro ourol outro outto ro-ro robbo robo- robor robot robrt robur rokkk rokot rokto rollo rolok rorbu rotko roto- rotol rotor rotot rotto roubt rouko roulk roull routt rt-rk rubor rullo rutul ruutu tbolt tbtbt tbutt tllbr tobol tobor tobot tobou tokko toko- tokol tokor tokuo tokur tolbo tolko tollo toloo tolor tolu- toluk toolt torob torok torro torto tortu torul toto- totok totoo toull touro trbuk troll trott troul trout trubu trull truro ttttt tubo- tubou tubul tukul tukur tulku tulor tulou tuotu turbo turbt turko turku turok turot turro turtu turul turut tutku tutor tutto tuuru ubobo ubolt ukobu ullur ululu uluru urkut uroob urour urtlu urubu urutu utro- utror uttur uturu ututo uuork uuuuu