a-ii a-ya aaaa aaab aaad aaai aaba aabb aabd aabi aaby aada aadi aaib aaii abaa abab abad abai abay abb- abba abbb abbi abby abda abdi abdy abia abib abid abiy abyy adaa adab adad adai aday adba adbi adda addd addi addy adia adib adya aiai aiba aida aidb aidi aidy aiia aiib aiid ayad ayay ayda ayya ba-i baaa baad baba babb babi baby bada badb badd badi bady baia baib baid baya bayi bbad bbay bbbb bbdd bday bdii biad biba bibb bibi bida bidi biya byyd daab daad daba dabb dada dadi dady daia daid daya dayi dday dddd dia- diab diad diba dibb diby dida didi didy diii diya diyi dya- dyab dyad dydd i-by iaaa iaai iaba iadb iaia ibad ibia ibid ibyi idad idda idia idid iida iiii iyai yaba yada yaid yaya ydad yday yida yidi yyyy