-aaa- aaaah aabaa aabba aabra aahaa aarah aarau aaroh abaab ababa ababu abara abaru abbar abbou abbur abhar abhor aboab abobo aboha abora abrar abura aburr ahhaa ahhha ahoah ahora ahrab ahrar ahura ahuru ar-ab arab- araba arabo arara araru arbab arbar arbor arhar aroab aroar aroba aroha aroor arora arrah arrau arrha arrou arrua aruaa aruba arura aruru aurar auro- auroa auror aurra babar babau baboo babou babra babur bahar bahau bahor bahra bahua bahur baobh baoro baraa barab barao barar barba barbu barha baro- baroa baroo baror barra barro barru barua baubo baura bauru bhara bhaur bhora bhour bo-bo bo-ho boaro bobar bobr bohor bohra booba boora booru borah borau borba borbo boro- boroa boroo borou borra borro bouar bouba boura brobo broha brora brrar brrrr bubba buoho buraa burah burao buroo burra burro burru h-bar ha-ha habab habba habbo habra habro habru hahha harab harar harau harbo haroa harra harro harua haruo harur hauho hhhhh hhour ho-ho ho-oh hobab hobah hobba hobor hobro hobub hooah hooha hoora horah horra horro horru hruba huara hubba hubur huhuh huraa hurab hurao hurra huuru o-r-b oaror obaba obara obhor obora oboro obrab oh-oh ohaba ohara oharu ohoba ohour ohrob ohura ooooh ooooo oorah oraba orara orobo oroha oroua oruro ouara ouoro ourba ra-ra raaba raaor rabab rabah rabba rabha rabor rabou rahab rharb ro-ro robab robar robbo robo- robor robur rohob rohru rooah rooba rorbu rorra rouba roura ruaha rubab rubba rubor rubra ruhab ruhub uaroo ubobo uh-oh uh-uh uhhoh uhhuh uhura uhuru uraba urbar uroob urour urrao urubu uuuuu