a-ii a-ya aaaa aaab aaai aaba aabb aabi aaby aaib aaii abaa abab abai abax abay abb- abba abbb abbi abby abia abib abiy abyy aiai aiba aiia aiib aixa aixi axi- axia ayay ayya ba-i ba-x baaa baba babb babi baby baia baib baix baxi baya bayi bbay bbbb biba bibb bibi bixa bixi biya i-by iaaa iaai iaba iaia ibia ibyi iiii ixia ixxi iyai xbai xiii xixi xxii xxix xxxi xxxx xxxy yaba yaxa yaxi yaya yyyy