a-ha aaaa aaab aaac aaad aaah aaba aabb aabc aabd aabh aabt aaca aacb aacc aacd aach aact aacu aada aadc aadt aadu aaha aata aatc aatt abaa abab abac abad abat abau abb- abba abbb abbt abca abcb abcc abcd abch abct abda abdu abha abta abtu abua abud abut ac-t acaa acab acac acad acat acba acca accc accd acch acct accu acda acdb acdc acdt acha achh acht achu acta actc acth actt actu acu- acut adaa adab adac adad adah adat adba adbc adcc adda addc addd addu adha adhd adhu adta adua adub ahab ahac ahad ahah ahat ahau ahha ahta ahua at-t ataa atab atac atad atat atca atcc atch atdt atha atta attu atua atub atuc auaa auca auch auct audc audh auht aut- auth baaa baad baah baat baba babb babu bac- baca bacc bach bact bada badb badd badh badu baha baht bahu bata batc bath batt batu bau- baud bbad bbau bbbb bbch bbdd bcaa bcat bcbc bcca bccc bcda bchd bctc bcuc bdbc bddc bddh bhat bhca bhcc bhut bhuu btaa btcc btdt bttb buad buat buba bubb bubu buca bucc buch bucu buda budb budd budu buha but- buta butt c-cd caaa caab caac caah caat caba cabu cac- caca cacc cach cada cadc cadd cadu caha caht cat- cata catb catc catd cath catt catu cauc caut cbac cbat cbbc cbca cbcc cbct cbcu cbdb cbdc cbha cbta cbtc ccaa ccab ccac ccad ccat ccba ccbc ccca cccb cccc cccu ccdc ccdh ccha cctb cctc cctt ccuc ccut cdaa cdac cdad cdba cdda cddb chaa chab chac chad chah chat chau chca chch chha chtt chua chub chud chut ctab ctba ctca ctta cuau cub- cuba cubb cuca cucc cuda cut- cuta cutc cuth cutt daab daad daau daba dabb dabt dabu daca dact dada dadu daha dahu data datt datu daub daud daut dbcc dbtt dcbc dcca dccb dccc dcct dccu dcdb dctc dddd ddub dhaa dhad dhat dhau dtaa dtac dtcc dthd duaa duab duad duah duat dub- duba dubb dubc dubh dubu duca duch duct duda dudd dudu duha duhu duta duut haab haad haat haba habt habu hada hadh hadu haha haht hata hatb hath hatt hatu hau- haud haut hbcd hbtu hcat hcbc hcca hccb hccc hcch hdca hdda hdtt hhaa hhat hhhh htab htcc huac huah huba hubb huch hucu huda hudd hudu huhu huta huth hutt hutu huub taa- taat taba tabb tabc tabu taca tacc tach tact tada taha tahu tata tatb tath tatt tatu taua taub tauc taut tbca tbcb tbcc tbcd tbta tcad tcca tccc tccu tcdd tch- tcha tchh tchu tctc tdac tddb thaa thad that thau thca thch thtb thud ttab ttbb tttt tuat tuba tubb tubu tuca tucc tuch tudu tuht tuhu tuta tutt tutu uabc uaca uata uath uatu uaua ubac ubba ubud ucad ucat ucbc ucca ucdc ucdd ucha ucua ucut udaa udad udau udbc udca uh-d uhta uhuh utac utah utau utha uttu uuta uuuu