a-ak a-be a-ok aaaa aaab aaae aaba aabb aabt aaea aaka aake aaoe aaoo aata aatk aatt abaa abab abae abak abat abb- abba abbb abbe abbo abbt abee abet aboa abob abok aboo abot abta aeka aeta aeto aett akaa akae akao akee akka akko akok akot akte aoba at-t ataa atab atae atak atat atea atee ateo atka atkt atob atoe atok atot atta atte atto baaa baak baat baba babb babe babo baek bak- baka bake bako bakt bata bate bato batt bbbb bbeb bbet beak beat beba bebb bebe bebo beeb beek beet beka beke beko beo- beok beot beta bete beto bett boab boak boat boba bobb bobe bobo boea boee boeo boet boka boke boko boob booe book boot bota botb bote boto bott btaa btek btob bttb eaba eata eate ebba ebbo eboe eboo eeea eeee eeka eeke eeta eete eka- ekab ekeb ekek eket ekka ekoa ekta eoka eota eoto etak etat etee etka etoe etok etta ette etto kaaa kaab kaak kaat kaba kabb kabe kabo kaeo kaet kaka kake kakk kako kakt kaoa kaok kat- kata katb kate katk kato katt kbaa kbab kbae kbak kbat kbba kbbb kbbe kbbk kbbo kbbt kbeb kbee kbek kbeo kbet kbkb kbkk kbko kboa kbob kboe kbok kboo kbot kbta kbtb kbte kbtk kbto kbtt kea- keak keat keba kebb kebe kebt keek keet keka kekb keke keko keok ket- keta kete ketk keto kett kkaa kkat kkba kkbb kkbe kkbo kkbt kkea kkkk kkoa kkob kkoo kkot kktk koab koae koak koba kobb kobe kobk kobo koea koka kokb koke kokk koko koob kook kooo koot kota kotb kote kotk koto kott ktaa ktae ktak ktao ktat ktba ktbb ktbt ktea ktee ktek ktkb ktke ktkk ktko ktkt ktob ktoe ktok ktoo ktot kttk ktto kttt o-eo oake oate obak obba obbo obea obet obkb oboe obok obot oeta okak oket okka okko okok okot okta okto ooaa ooak ooba oobe oooo ootb otak otea otee oto- otoe otok otoo otta otte otto taa- taat taba tabb tabe tabo taka take takk tako takt taoa tata tatb tate tato tatt tbta teak teat teba tebo teek teet teka teke teok teta tete teto tett toab toat toba tobe tobo tobt toea toee toek toet toka toke toko tooa took toot tota tote toto tott ttab ttbb tteo ttoe tttt