a-ha aaaa aaab aaac aaah aaba aabb aabc aabh aabt aaca aacb aacc aach aact aacu aaha aata aatc aatt abaa abab abac abat abau abb- abba abbb abbt abca abcb abcc abch abct abha abta abtu abua abut ac-t acaa acab acac acat acba acca accc acch acct accu acha achh acht achu acta actc acth actt actu acu- acut ahab ahac ahah ahat ahau ahha ahta ahua at-t ataa atab atac atat atca atcc atch atha atta attu atua atub atuc auaa auca auch auct auht aut- auth baaa baah baat baba babb babu bac- baca bacc bach bact baha baht bahu bata batc bath batt batu bau- bbau bbbb bbch bcaa bcat bcbc bcca bccc bctc bcuc bhat bhca bhcc bhut bhuu btaa btcc bttb buat buba bubb bubu buca bucc buch bucu buha but- buta butt caaa caab caac caah caat caba cabu cac- caca cacc cach caha caht cat- cata catb catc cath catt catu cauc caut cbac cbat cbbc cbca cbcc cbct cbcu cbha cbta cbtc ccaa ccab ccac ccat ccba ccbc ccca cccb cccc cccu ccha cctb cctc cctt ccuc ccut chaa chab chac chah chat chau chca chch chha chtt chua chub chut ctab ctba ctca ctta cuau cub- cuba cubb cuca cucc cut- cuta cutc cuth cutt haab haat haba habt habu haha haht hata hatb hath hatt hatu hau- haut hbtu hcat hcbc hcca hccb hccc hcch hhaa hhat hhhh htab htcc huac huah huba hubb huch hucu huhu huta huth hutt hutu huub taa- taat taba tabb tabc tabu taca tacc tach tact taha tahu tata tatb tath tatt tatu taua taub tauc taut tbca tbcb tbcc tbta tcca tccc tccu tch- tcha tchh tchu tctc thaa that thau thca thch thtb ttab ttbb tttt tuat tuba tubb tubu tuca tucc tuch tuht tuhu tuta tutt tutu uabc uaca uata uath uatu uaua ubac ubba ucat ucbc ucca ucha ucua ucut uhta uhuh utac utah utau utha uttu uuta uuuu