a-be a-ii aaaa aaab aaae aaai aaba aabb aabi aabt aaea aaib aaii aaoe aaoo aata aatt abaa abab abae abai abat abb- abba abbb abbe abbi abbo abbt abee abet abia abib abie abit aboa abob aboo abot abta aebi aeio aeit aeta aeto aett aiai aiba aibo aiea aiee aiet aiia aiib aioi aita aite aiti aitt aoba at-t ataa atab atae atai atat atea atee atei ateo atia atie atit atob atoe atoi atot atta atte atti atto ba-i baaa baat baba babb babe babi babo baia baib baie baio bait bata bate bati bato batt bbbb bbeb bbet beat beba bebb bebe bebi bebo beeb beet beia beit beo- beot beta bete beti beto bett biao biat biba bibb bibe bibi bibo bieb biet bio- bioi biot bita bite bito bitt boab boai boat boba bobb bobe bobi bobo boea boee boeo boet boi- boie boii boit boob booe boot bota botb bote boti boto bott btaa btie btob bttb eaba eata eate eati ebba ebbo ebit eboe eboo eeea eeee eeta eete eiao eiei eita eitb eiti eito eota eoto etai etat etee etio etoe etta ette etti etto i-be iaaa iaai iaat iaba iaea iaia iata iate iati ibat ibea ibet ibia ibie ibot ibtb ieat ieet ieie ieio ieta iett iiie iiii iiio iiit iioi iioo iita iitt ioba iobi ioee ioii ioio ioit iooi iooo iota iote ioto itaa itai itat itbe itea itet itia itie itoi itoo itta itto o-eo oate obai obba obbo obea obet obia obie obit oboe oboi obot oeta oeti oiba oiii oita oiti ooaa ooba oobe oobi ooia oooo ootb otea otee otit oto- otoe otoo otta otte otti otto taa- taat taba tabb tabe tabi tabo taia taio tait taoa tata tatb tate tati tato tatt tbit tbta teat teba tebo teet teia teie teta tete teti teto tett tiaa tiab tiao tiba tibi tie- tiea tiee tiei tieo tiet tiit tita tite titi tito titt toab toat toba tobe tobi tobo tobt toea toee toei toet toie toit tooa toot tota tote toti toto tott ttab ttbb tteo ttoe tttt