a-ii aaaa aaab aaai aaba aabb aabi aaib aaii aaoo abaa abab abai abau abb- abba abbb abbi abbo abia abib abiu aboa abob aboo abou abua aiai aiba aibo aiia aiib aioi aiui aoba aqai aqu- aqua aquo auaa ba-i baaa baba babb babi babo babu baia baib baio baqa bau- bbau bbbb bbbq biao biba bibb bibi bibo bio- bioi biou biqi boab boai boba bobb bobi bobo bobu boi- boii boiu boob boua buba bubb bubi bubo bubq bubu buiu buqa iaaa iaai iaba iaia ibia iiii iiio iioi iioo ioba iobi ioii ioio iooi iooo iuiu oaau obai obba obbo obia oboi oboq oiba oiii ooaa ooba oobi ooia oooo oqui ouii ouu- qabo qiao qibo qobu qoob qqqq quaa quab quai quba qubi qubo quia quib quob quoi quu- uaua ubba ubbi ubbo ubii uqao uuuu