bbbb bbdd bd-r bdii bdmi bdrm bibb bibi bidi bidr bidu birb bird biri birr biru bmdb bmir bmmi brdm brid brim brrm brrr brud brum bubb bubi bubu budb budd budi budu buid buir buiu bum- bumb bur- burb burd buri burm burr buru dddd ddub dibb didi didu diii dimi dimm dimu dird dirr dmrb drib drub drui drum druu dub- dubb dubu dudd dudu duid duir dumb dumi dumm duri duru duur ibbm ibid ibim ibrd ibri idbm iddm idid idir idub iiii iium imbi imdb imdi imid imir immi imri imrr irbm iri- irid irri iuiu mbdb mbim mddm mdii mdud mid- midi miii mim- mimd mimi mird miri mirr miru miui mmdb mmdi mmii mmmd mmmm mrbb mrbm mrdd mrmd mrud mubi mudd mudi mudu muid muir mumm mumu murd muri murr muru rbbb rbbr rdbm rib- ribu ridd ridi rimi rimm rimu riri rrrr rrum rubb rubi rubu rudd rudi ruid rumb rumi rumm rurd ruri ruru ruud ubbi ubid ubii ubir ubud uddi udid udim udir uirr umb- umbi umri urbi urdu urib urim uriu urmi urri urum urur uuri uuuu