a-ii aaaa aaab aaad aaai aaba aabb aabd aabi aabt aada aadi aadt aaib aaii aata aatt abaa abab abad abai abat abb- abba abbb abbi abbt abda abdi abia abib abid abit abta adaa adab adad adai adat adba adbi adda addd addi adia adib adit adta aiai aiba aida aidb aidi aidt aiia aiib aiid aita aiti aitt at-t ataa atab atad atai atat atdi atdt atia atid atit atta atti ba-i baaa baad baat baba babb babi bada badb badd badi baia baib baid bait bata bati batt bbad bbbb bbdd bdii biad biat biba bibb bibi bida bidi bita bitd bitt btaa btdt bttb daab daad daba dabb dabt dada dadi daia daid dait data dati datt dbit dbtt dddd dia- diab diad diat diba dibb dida didi diii dita diti ditt dtaa iaaa iaai iaat iaba iadb iadt iaia iata iati ibad ibat ibia ibid ibtb idad idat idda idia idid idta iida iiii iiit iita iitt itaa itai itat itia itta taa- taat taba tabb tabi tada taia tait tata tatb tati tatt tbit tbta tddb tiaa tiab tiba tibi tidd tiit tita titi titt ttab ttbb tttt