bhoun bhour bo-bo bo-ho bobr bohon bohor bohun bonon bonou boorn booru borbo born- borno bornu boro- boron boroo borou borro borun bourn brobo brohn bronn broon broun brrrr bruhn brunn bruno bruun bubon bunun buoho buono burn- buron buroo burro burru burun hburn hhhhh hhour hnnbo ho-ho ho-oh hobor hobro hobub honbu honno honor hoorn hornb horno horon horro horru hubur huhuh huorn huron huuru nnooo no-no nobob nobuo nohno nohor non-u nonno nonoh noonu norbu noron norro norun nu-nu nuhuh nunon nunun nuoro nurun o-bon o-r-b obhor oboro oh-oh ohorn ohour ohrob onhbo onoon onorn onour ooooh ooooo ornon orobo orono oruro ouoro ourno rhoon ro-ro robbo robo- robon robor robun robur rohob rohru rohun ronno rorbu rubon rubor ruhnu ruhub runo- runon ubobo uh-oh uh-uh uhhoh uhhuh uhuru unnun unnur unoor unorn unruh unrun unurn uroob urour urubu uuuuu