a-be a-ha aaaa aaab aaae aaah aaba aabb aabh aabt aaea aaha aata aatt abaa abab abae abat abb- abba abbb abbe abbt abee abet abha abta aeta aett ahab ahah ahat ahet ahha ahta ahte at-t ataa atab atae atat atea atee atha athe atta atte baaa baah baat baba babb babe baha baht bata bate bath batt bbbb bbeb bbet beah beat beba bebb bebe beeb beet beta bete beth bett bhat bhet btaa bttb eaba eabh eata eate eath ebba eeea eeee eeta eete eeth ehaa ehea eheh ehte etah etat etee eth- etha ethe etta ette haab haat haba habe habt haet haha haht hata hatb hate hath hatt heah heat hebb hebe heeb heet hehe heta hete heth hett hhaa hhat hhhh htab htea htet taa- taat taba tabb tabe taha tahe tata tatb tate tath tatt tbta teat teba teet teta tete teth tett thaa thae that the- thea theb thee thet thtb ttab ttbb tttt