bbbb bblb bboy bbyo bibb bibi bibl bibo bili bill bilo bilu bily bio- bioi biol biou blio blob bloo blou bloy blub bly- bobb bobi bobo bobu boby boi- boii boil boiu boli boll bolo bolu boly boob bool boul bouy boyi boyl boyo bubb bubi bubo bubu buiu bulb buli bull bulu buol buoy buyi buyl buyo buyu byil byob byoi byol byul i-by ibly ibuy ibyi iiii iiio iioi iioo ilio ill- illi illo illy iloo iluy iobi ioby ioii ioio iolo iooi iooo iuiu libo libu liii lilb lili lill lilo lilu lily lio- liyl liyu llll lloo lob- lobb lobi lobo loby loiu loli loll lolo loly loob lool loui loul louu luby luli lull lulu luyi lyly lyo- obbo obby oblu oboi obol oboy oiii oily oiyl olbo olby olib olio olli ollo olly oobi ooby oolo oooo ouii oulu ouu- oyly oyou ubbi ubbo ubii ubli ublo ubly ulli ullo ully ulo- ulul uulu uuuu yili yill ylli yobi yobo yoli yoll yolo yoly yool youb youi youl yoyo yubu yuli yulo yulu yuyu yyyy