a-be aaaa aaab aaae aaap aaba aabb aabp aabt aaea aaep aapa aapt aata aatt aaup abaa abab abae abap abat abau abb- abba abbb abbe abbt abee abet abpa abpp abta abtu abua abue abut aeap aeta aett apap apat apba apea apep apet apeu appa appt appu apta apte aptt apua apup at-t ataa atab atae atap atat atea atee atep atta atte attp attu atua atub auaa aube aut- aute baaa baat baba babb babe babu bapa bape bapp bapt bapu bata bate batt batu bau- bbau bbbb bbeb bbet beap beat beau beba bebb bebe beeb beep beet beta bete bett betu bpea btaa btbp bttb buat buba bubb bube bubu buea bueu bupa but- buta bute butt eaba eapp eata eate ebba eeea eeee eeta eete eetu epaa epee eppa eppp epta epte epub etap etat etee etta ette ettu etua euba paap paat paba pabt pabu paea paep papa papb pape papp pata pate patt patu paua paup paut pbpa peab peap peat peau peba peep peet pepa pepe peta pete pett peut ppap pppa pppp ppta pptt ptab pu-e pube pubu puet pueu pupa pupe pupu put- puta pute putt putu taa- taat taba tabb tabe tabu tapa tape tapp tapt tapu tata tatb tate tatt tatu taua taub taue taut tbta tbtp teat teba tebu teet tepa tepe tepp tepu teta tete tett tetu teut tpap tpau tppa tppp tpte tptp tput ttab ttbb tttt tuae tuat tuba tubb tube tubu tuet tupa tupe tupu tuta tute tutt tutu uata uatu uaua ubba ubbe ubet ueba upat upbe uppa uppe uppp uppu upup utau utep utpa uttu uuta uuuu