a-ii a-ya a-yo aaaa aaab aaai aaba aabb aabi aaby aaib aaii aaoo abaa abab abai abay abb- abba abbb abbi abbo abby abia abib abiy aboa abob aboo aboy abyy aiai aiba aibo aiia aiib aioi aoba ay-o ayao ayay ayoo ayya ba-i baaa baba babb babi babo baby baia baib baio baya bayi bayo bbay bbbb bboy bbyo biao biba bibb bibi bibo bio- bioi biya boab boai boba bobb bobi bobo boby boi- boii boob boya boyi boyo byoa byob byoi i-by iaaa iaai iaba iaia ibia ibyi iiii iiio iioi iioo ioba iobi ioby ioii ioio iooi iooo iyai obai obay obba obbo obby obia oboi oboy oiba oiii ooaa ooba oobi ooby ooia oooo yaba yabo yaoi yaya yayo yoba yobi yobo yoyo yyyy