a-ii aaaa aaab aaai aaba aabb aabi aabt aaib aaii aaoo aata aatt abaa abab abai abat abb- abba abbb abbi abbo abbt abia abib abit aboa abob aboo abot abta aiai aiba aibo aiia aiib aioi aita aiti aitt aoba at-t ataa atab atai atat atia atit atob atoi atot atta atti atto ba-i baaa baat baba babb babi babo baia baib baio bait bata bati bato batt bbbb biao biat biba bibb bibi bibo bio- bioi biot bita bito bitt boab boai boat boba bobb bobi bobo boi- boii boit boob boot bota botb boti boto bott btaa btob bttb iaaa iaai iaat iaba iaia iata iati ibat ibia ibot ibtb iiii iiio iiit iioi iioo iita iitt ioba iobi ioii ioio ioit iooi iooo iota ioto itaa itai itat itia itoi itoo itta itto obai obba obbo obia obit oboi obot oiba oiii oita oiti ooaa ooba oobi ooia oooo ootb otit oto- otoo otta otti otto taa- taat taba tabb tabi tabo taia taio tait taoa tata tatb tati tato tatt tbit tbta tiaa tiab tiao tiba tibi tiit tita titi tito titt toab toat toba tobi tobo tobt toit tooa toot tota toti toto tott ttab ttbb tttt