bholu bhool bhoun bhour bloor blorb blurb blurr bo-bo bo-ho bobr bohol bohon bohor bohun bolho boll- bollo bollu bolno bolon bonon bonou boorn booru borbo born- borno bornu boro- boron boroo borou borro borul borun boul- boulo bourn brloh brobo brohl brohn broll brolo bronn brool broon broun brrrr bruhl bruhn brull brunn bruno bruun bubon bulb- bull- bulou bulul bulun bunun buoho buono burn- burol buron buroo burro burru burun hburn hhhhh hhour hnnbo ho-ho ho-oh hobol hobor hobro hobub hohol holbr hollo holo- holon holor holou holub holul honbu honno honor hoorn hornb horno horol horon horro horru hubur huhuh hullo hulon hulun huolu huorn hurll huron huuru l-ron lobbo lobo- lobon lobor lohho lohur lollo lolol loobu loron lorun louro lubno lubon lubun lubur lulul lurun nnooo no-no nobob nobol nobuo nohno nohor non-u nonno nonoh noonu norbu noron norro norun nu-nu nuhuh nullo nunon nunun nuoro nurlu nurun o-bon o-r-b obhor oblon obolo oboro oh-oh ohorn ohour ohrob ollon ollur olour onhbo onoon onorn onour ooooh ooooo orlon ornon orobo orolu orono oruro oullo oulon oulun ouoro ourno ourol rhoon ro-ro robbo robo- robon robor robun robur rohob rohru rohun rollo rolon ronno rorbu roull rubon rubor ruhnu ruhub rullo rulon runo- runon ubobo uh-oh uh-uh uhhoh uhhuh uhuru ullur ulno- ululu uluru unnun unnur unoor unorn unrol unruh unrun unurn uroob urour urubu uuuuu