a-ii aaaa aaab aaai aaba aabb aabi aabt aaib aaii aata aatt abaa abab abai abat abax abb- abba abbb abbi abbt abia abib abit abta aiai aiba aiia aiib aita aiti aitt aixa aixi at-t at-x ataa atab atai atat atax atia atit atta atti axat axi- axia ba-i ba-x baaa baat baba babb babi baia baib bait baix bata bati batt baxi baxt bbbb biat biba bibb bibi bita bitt bitx bixa bixi btaa bttb iaaa iaai iaat iaba iaia iata iati ibat ibia ibtb iiii iiit iita iitt itaa itai itat itia itta ixia ixxi taa- taat taba tabb tabi taia tait taix tata tatb tati tatt tax- taxa taxi taxt tbit tbta tiaa tiab tiax tiba tibi tiit tita titi titt tixt ttab ttbb tttt txaa txii xait xbai xiii xita xixi xxii xxix xxxi xxxx