a-be aaaa aaab aaae aaba aabb aabt aaea aaoe aaoo aata aatt abaa abab abae abaj abat abb- abba abbb abbe abbo abbt abee abet aboa abob aboo abot abta aeta aeto aett ajab ajao ajat ajba ajee ajet ajob ajoo ajot aoba at-t ataa atab atae atat atea atee ateo atob atoe atot atta atte atto baaa baat baba babb babe babo baja bata bate bato batt bbbb bbeb bbet beat beba bebb bebe bebo beeb beej beet beja beo- beot beta bete beto bett bjoa boab boat boba bobb bobe bobo boea boee boeo boet bojo bojt boob booe boot bota botb bote boto bott btaa btob bttb eaba eata eate ebba ebbo eboe eboo eeea eeee eeta eete ejob ejoo ejot eota eoto etat etee etoe etta ette etto jaba jabo jaja jato jbaa jbob jeat jebb jebe jeet jeta jetb jete jett joab joao joba jobe jobo joea joee jojo joot jota joto jott o-eo oate obba obbo obea obet obja oboe obot oeta ojea ooaa ooba oobe oooo ootb otea otee oto- otoe otoo otta otte otto taa- taat taba tabb tabe tabo tajo taoa tata tatb tate tato tatt tbta teat teba tebo teej teet teja tejo teta tete teto tett toab toat toba tobe tobo tobt toea toee toet toja tojo tooa toot tota tote toto tott ttab ttbb tteo ttoe tttt