b-r-k bbook bo-bo bobko bobok bobov bobr bokko bokok bokor bokov booko bookz borbo borko boro- borok boroo borov borro borvo bozok bozoo bozov brobo brook brrrr k-rob ko-ko kokko kokor korbo koror korro kovor o-r-b oboro obrok obrov obzor okobo okoro ooooo oovoo orobo ozoro ro-ro robbo robo- robor rokkk rozov v-bob v-bor vokov vozok vrbov zokor zorbo zorko zorro zovko zzzzz