a-be aaaa aaab aaad aaae aaap aaba aabb aabd aabp aabt aada aade aadt aadu aaea aaep aapa aapt aata aatt aaup abaa abab abad abae abap abat abau abb- abba abbb abbe abbt abda abdu abed abee abet abpa abpd abpp abta abtu abua abud abue abut adaa adab adad adae adap adat adba adda addd adde addu adea adeb adee adet adp- adta adua adub adue aeap aede aedt aeta aett apap apat apba apda apdd apdu apea aped apep apet apeu appa appd appt appu apta apte aptt apua apud apup at-t ataa atab atad atae atap atat atdt atea ated atee atep atta atte attp attu atua atub auaa aube aude aut- aute baaa baad baat baba babb babe babu bada badb badd bade badu baed bapa bape bapp bapt bapu bata bate batt batu bau- baud bbad bbau bbbb bbdd bbeb bbet bead beap beat beau beba bebb bebe beda bede bedu beeb beed beep beet beta bete bett betu bpda bpea btaa btbp btdt bttb buad buat buba bubb bube bubu buda budb budd bude budu buea bueu bupa but- buta bute butt daab daad daae daap daau daba dabb dabp dabt dabu dada dade dadu daeb daeu dapa dape dapp dapu data date datp datt datu daub daud daue daut dbpd dbtt dddd ddub dead deae deap deau deba debe debt debu deda dedd dede dedu deeb deed deep deet depa depe depp dept deta dete deua deue deut dpaa dpdt dppa dtaa dtap dtdp dted dttp duaa duab duad duat dub- duba dubb dube dubu duda dudd dude dudu duet dupa dupe duta dute dutp duut eaba eada eadb eadd eadp eapp eata eate ebba ebed edad edda edde eddp ede- edea edta edup eede eedu eeea eeee eeta eete eetu epaa epad epee eppa eppp epta epte epub etap etat etee etta ette ettu etua euba eude paap paat paba pabt pabu pada padd pade padu paea paep papa papb pape papp pata patd pate patt patu paua paud paup paut pbed pbpa pdea pdpa peab peap peat peau peba ped- peda pede peed peep peet pepa pepd pepe peta pete pett peut ppad ppap pppa pppd pppp ppta pptt ptab ptpd pu-e pube pubu pudu pued puet pueu pupa pupe pupu put- puta pute putt putu taa- taat taba tabb tabe tabu tada tade tapa tape tapp tapt tapu tata tatb tate tatt tatu taua taub taue taut tbta tbtp tdap tddb tead teat teba tebu teda tedd tede teed teet tepa tepe tepp tepu teta tete tett tetu teut tpap tpau tpdu tped tppa tppd tppp tpte tptp tput ttab ttbb tttt tuae tuat tuba tubb tube tubu tude tudu tuet tupa tupe tupu tuta tute tutt tutu uata uatu uaua ubba ubbe ubet ubud udaa udad udau udea udet udpd ueba ueda upat upbe upda uped uppa uppe uppp uppu upup utau utep utpa utpd uttu uuta uuuu