b-r-k bbook bhook bhoun bhour bkorn bo-bo bo-ho bobko bobok bobr bohok bohon bohor bohun bokko bokok bokor bokun bonon bonou booko boonk boorn booru borbo borko borku born- borno bornu boro- borok boron boroo borou borro borun bouko bourn brobo brohn bronk bronn brook broon brouk broun brrrr bruhn brunk brunn bruno bruun bubon bukk- buknu bukor bunko bunuk bunun buoho buono burn- buron buroo burro burru buruk burun hburn hhhhh hhour hnnbo ho-ho ho-oh hobor hobro hobub hokku honbu honko honno honor hoorn hornb horno horon horro horru hubur huhuh hukok huork huorn hurko hurok huron huuru k-rob khoku khonb khoro khour khuru khuur knokk knork knorr knurr ko-ko kobru kobuk kobun kohon kokko kokor kokou kokur konbu konno konnu konro konur koonu koorn kooru korbo korku korno koron koror korro koruk korun kouno krnuo krohn kronk kroon kroun krunk kruun kubok kukko kukok kukur kunku kunur kurbu kurku kuruk nkubu nnooo no-no nobob nobuo nohno nohor nokko nokon non-u nonno nonoh noonu norbu norok noron norro norun nu-nu nuhuh nunon nunun nuoro nuruk nurun o-bon o-r-b obhor oboro obrok oh-oh oh-ok ohorn ohour ohrob okkur okobo okoho okoro okubo okuku okuru onhbo onoon onorn onour ooooh ooooo ornon orobo orono oruku oruro ouoro ourno rhoon ro-ro robbo robo- robon robor robun robur rohob rohru rohun rokkk rokon ronk- ronko ronno ronok rookh rorbu rouko rubon rubor ruhnu ruhub runo- runon ubobo uh-oh uh-uh uhhoh uhhuh uhuru ukobu unkur unnun unnur unoor unorn unruh unrun unurn urkun urnok uroob urour urubu uuork uuuuu