b-r-k bbook bkorn bo-bo bobko bobok bobr bokko bokok bokor bokun bonon bonou bonut booko boonk boont boorn boort booru borbo borko borku born- borno bornt bornu boro- borok boron boroo borot borou borro borun borut botok boton botou botro bottu botun bouko bourn bouto brobo bronk bronn bront brook broon broto brouk broun brout brrrr brunk brunn bruno brunt bruun btr-t btron bubon bukk- buknu bukor bunko bunuk bunun bunut buono burn- burnt buron buroo burro burru burtt buruk burun burut butko butno buto- buton butor butot butou butuo butut k-rob k-t-b knokk knork knorr knott knout knurr ko-ko kobru kobuk kobun kokko kokor kokot kokou kokur kokut konbu konno konnu konro konur koonu koorn kooru korbo korku korno koron koror korro kortu koruk korun koton kotor kotto kottu kotur kouno kouto krnuo kronk kroon kroot kroun krout krtok krunk kruto kruun kubok kukko kukok kukur kunku kunur kurbu kurku kuruk kutno kutob kuttu kutur nkotb nkubu nnooo no-no nobob nobuo nobut nokko nokon non-u nonno nonot noonu noort norbu norok noron norro nortt norun notno noto- notok noton notto nourt ntoro nu-nu nunon nunun nuoro nuruk nurun nuton nutuk o-bon o-r-b oboro obout obrok okbut okkur okobo okoro okrut okubo okuku okuru onont onoon onorn onoto onour onout onto- ontoo ontur ooooo orbot orkut ornon ornot orobo orono orout ortok orton ortoo oruku oruro orutu otoku otono ototo otour otrok ottur oubut ouoro ourno outon outro outto ro-ro robbo robo- robon robor robot robrt robun robur rokkk rokon rokot rokto ronk- ronko ronno ronok ronto rorbu rotko roto- roton rotor rotot rotto rotun roubt rouko rount routt rt-rk rubon rubor runo- runon runto ruutu t-nut tbtbt tbutt tntnt tobon tobor tobot tobou tokko toko- tokor tokuo tokur tonbu tono- tonto torob torok toron torro torto tortu torun toto- totok toton totoo tourn touro trbuk tronk trono troon trott trout trubu trunk truro ttttt tubo- tubon tubou tukur tunku tunon tuotu turbo turbt turko turku turn- turno turnt turnu turok turon turot turro turtu turut tutku tutor tutto tutun tuuru ubobo ukobu unkur unnun unnur unnut unoor unorn unrun unurn urkun urkut urnok uroob urour urubu urutu utro- utror uttur uturn uturu ututo uuork uuuuu