a-be a-ha aaaa aaab aaac aaae aaah aaba aabb aabc aabh aabt aaca aacb aacc aace aach aact aaea aaec aaha aata aatc aatt abaa abab abac abae abat abb- abba abbb abbe abbt abca abcb abcc abch abct abec abee abet abha abta ac-t acaa acab acac acae acat acba acca accc acce acch acct ace- acea acec aceh acet acha ache achh acht acta actc acte acth actt aeac aecb aect aeta aetc aett ahab ahac ahah ahat ahet ahha ahta ahte at-t ataa atab atac atae atat atca atcc atch atea atec atee atha athe atta atte baaa baah baat baba babb babe bac- baca bacc bace bach bact baha baht bata batc bate bath batt bbbb bbch bbeb bbet bcaa bcat bcbc bcca bccc bcec bcet bche bctc beah beat beba bebb bebe beca bech beeb beet beta betc bete beth bett bhat bhca bhcc bhet btaa btcc btec bttb caaa caab caac caah caat caba cabe cac- caca cacc cace cach caec caha cahe caht cat- cata catb catc cate cath catt cbac cbat cbbc cbca cbcc cbce cbct cbea cbec cbee cbet cbha cbta cbtc ccaa ccab ccac ccat ccba ccbc ccca cccb cccc ccee ccha cche cctb cctc cctt ceac ceat ceba cec- ceca cece cect ceeb ceec cet- ceta cete chaa chab chac chae chah chat chca chce chch chea cheb chec chee cheh chet chha chtt ctab ctae ctba ctca ctec ctta eaba eabh eaca eacc each eaec eata eate eath ebac ebba ebbc ebcc ecaa ecac ecat ecbc ecbe ecca eccb eccc ecce ecct echa eche echt ect- ecta ectc ecth eeca eeea eeee eeta eetc eete eeth ehaa ehcc ehea eheh ehte etah etat etbc etcc etch etec etee eth- etha ethe etta ette haab haat haba habe habt hace haec haet haha haht hata hatb hate hath hatt hcat hcbc hcca hccb hccc hcch heah heat hebb hebe heca hech hect heeb heet hehe heta hete heth hett hhaa hhat hhhh htab htcc htea htet taa- taat taba tabb tabc tabe taca tacc tace tach tact taec taha tahe tata tatb tate tath tatt tbca tbcb tbcc tbce tbta tcca tccc tch- tcha tche tchh tctc teac teat teba teca tech tect teec teet teta tete teth tett thaa thae that thca thch the- thea theb thec thee thet thtb ttab ttbb tttt