bbbb bbdd bbdo bboy bbyo bdii bibb bibi bibo bidi bido bidu bio- bioi biou bobb bobi bobo bobu boby bodb bodi bodo bodu body boi- boid boii boiu boob bood boud bouy boyd boyi boyo bubb bubi bubo bubu budb budd budi budo budu budy buid buiu buoy buyi buyo buyu byob byod byoi byyd d-bo dboy dddd ddub dibb dibo diby didi dido didu didy diii diou diyi diyu dobb dobi dobu doby dod- dodd dodi dodo dody doid doob dood doub doud douy doyo dub- dubb dubu duby dudd dudo dudu duid duo- dybu dydd dyio dyo- dyoo dyou i-by ibdo ibid ibuy ibyi iddo idid idio idub iduo iiii iiio iioi iioo iobi ioby iod- iodd iodo ioii ioio iooi iooo iuiu obbo obby obid oboi oboy odbo oddd oddi oddy odio odiu odoo odou oido oiii oobi ooby oodi ooid oooo ouii ouu- oyou ubbi ubbo ubid ubii ubod ubud uddi udid udoo uuuu uydo yidi yidu yiud yobi yobo yodo yood youb youd youi yoyo yubu yudo yudu yuyu yyyy