b-r-k bbook bkorn bo-bo bobko bobok bobr bogno bogon bogor bokko bokok bokor bongo bonon booko boong boonk boorn borbo borgo borko born- borno boro- borok boron boroo borro brobo brong bronk bronn brook broon brrrr gboko go-go go-on go-oo gobbo gogok gogon gogro gongo gonnn gonno gono- goobo goong gorgo gorno grogg grokk grong gronk grono grook groon grrrr k-rob knokk knork knorr ko-ko kogon kogro kokko kokor kongo konno konro koorn korbo korng korno koron koror korro kronk kroon ngoko ngong ngoro nnooo no-go no-no nobob nokko nokon nonno norok noron norro o-bon o-r-b oboro obrok ognon ogogo ogron okobo okoro okrog ongon onoon onorn ooooo orgon ornon orobo orono orrgo ro-ro robbo robo- robon robor rogno rokkk rokon rongo ronk- ronko ronno ronok roong