a-be aaaa aaab aaae aaba aabb aabt aaea aata aatt abaa abab abae abat abb- abba abbb abbe abbt abee abet abez abta abza aeta aett at-t ataa atab atae atat atea atee atez atta atte aza- azab azat azaz azet azza baaa baat baaz baba babb babe baez bata bate batt batz baza baze bbbb bbeb bbet beat beba bebb bebe beeb beet beta bete bett betz beze btaa bttb bzzt bzzz eaba eata eate ebba eeea eeee eeta eete eeze etat etee etta ette taa- taat taba tabb tabe tata tatb tate tatt tatz taza taze tazz tbta teat teaz teba teet teez teta tete tett tetz teza tezz ttab ttbb tttt tzzt zaat zaba zaza zeae zeba zebe zeta zete zeze zzzz