a-be aaaa aaab aaae aaap aaba aabb aabp aabt aaea aaep aaoe aaoo aapa aapo aapt aata aatt aaup abaa abab abae abap abat abau abb- abba abbb abbe abbo abbt abee abet aboa abob aboo abot abou abpa abpp abta abtu abua abue abut aeap aeta aeto aett aoba aoeu aopo aout apao apap apat apba apea apep apet apeu apo- apoe apoo apop apot apou appa appt appu apta apte aptt apua apup at-t ataa atab atae atap atat atea atee ateo atep atob atoe atop atot atta atte atto attp attu atua atub auaa aube aut- aute auto baaa baat baba babb babe babo babu bapa bape bapp bapt bapu bata bate bato batt batu bau- bbau bbbb bbeb bbet beap beat beau beba bebb bebe bebo beeb beep beet beo- beot bepo beta bete beto bett betu boab boat boba bobb bobe bobo bobu boea boee boeo boep boet boob booe boop boot bopa bope bopp bota botb bote boto bott boua boue boup bout bpea bpoe bpot btaa btbp btob bttb buat buba bubb bube bubo bubu buea bueu bupa but- buta bute buto butt eaba eaop eapp eata eate ebba ebbo eboe eboo ebpo eeea eeee eeta eete eetu eota eoto epaa epee epot eppa eppo eppp epta epte epub etap etat etee etoe etta ette etto ettu etua euba o-eo oaau oate obba obbo obea obet oboe obot oepa oeta ooaa ooba oobe oooo ootb ootp opap opep opet opo- oppa oppo opto opua otap otea otee otep oto- otoe otoo otpp otta otte otto ottu ouat ouea oupa oupe out- outa outb oute outo ouu- paap paat paba pabt pabu paea paep papa papb pape papp pata pate pato patt patu paua paup paut pbpa peab peap peat peau peba peep peet peou pepa pepe pepo peta pete peto pett peut poat poba pobo poea poet poop poot pop- popa pope popo popp popt pota pote poto pott potu poup pout ppap ppoa pppa pppo pppp ppta pptt ptab ptop pu-e puao pube pubu pueo puet pueu pupa pupe pupu put- puta pute puto putt putu taa- taat taba tabb tabe tabo tabu taoa taou tapa tape tapo tapp tapt tapu tata tatb tate tato tatt tatu taua taub taue taut tbta tbtp teat teba tebo tebu teet tepa tepe tepp tepu teta tete teto tett tetu teut toab toat toau toba tobe tobo tobt tobu toea toee toet tooa toot top- topa tope topo topp topt topu tota tote toto tott toup tout tpap tpau tppa tppp tpte tptp tput ttab ttbb tteo ttoe ttop tttt tuae tuao tuat tuba tubb tube tubo tubu tuet tupa tupe tupo tupu tuta tute tuto tutt tutu tuuo uata uatu uaua ubba ubbe ubbo ubet ueba upat upbe uppa uppe uppp uppu upto upup utau utep utpa utto uttu uuta uuuu