bloor blorb blow- blown blurb blurr bo-bo bobr boll- bollo bollu bolno bolon bolow bonon bonou boorn booru borbo born- borno bornu boro- boron boroo borou borow borro borul borun boul- boulo bourn bowln bowon bowow brobo broll brolo bronn brool broon broun brown brrrr brull brunn bruno bruun bubon bulb- bull- bulou bulow bulul bulun bunun buono burn- burol buron buroo burow burro burru burun bwool l-ron lbowo lobbo lobo- lobon lobor lollo lolol loobu loron lorun louro lowno lowon lubno lubon lubow lubun lubur lulul lurun nnooo no-no nobob nobol nobuo non-u nonno noonu norbu noron norro norun nowlu nowon nowor nu-nu nullo nunon nunun nuoro nurlu nurun o-bon o-r-b oblon obolo oboow oboro obowo obrow ollon ollur olour onbow onlow onnow onoon onorn onour ooooo orlon orlow ornon orobo orolu orono orrow oruro oullo oulon oulun ouoro ourno ourol owbon ro-ro robbo robo- robon robor robun robur rollo rolon ronno rorbu roull rubon rubor rullo rulon runo- runon runow ubobo ullur ulno- ulowo ululu uluru unbow unnun unnur unoor unorn unown unrol unrow unrun unurn unwon uroob urour urowo urubu uuuuu worow wowow wurno wwwww