b-tree bbbbbb bebite beebee beeter beiber berbee berber bereet berere berrer berret berrie bertie bertre betere betete betire bettee better bettie betwit bewire bewter bibber bibiri bieber birewe biribi biteit bitier bitter bittie biwere biwite biwiti breere breite brette brewer brewet brewit bribe- bribee briber bribir bribri bweiti ebbert ebr-ii ebrie eebree eerier eibert erbree erebti errett ewerer i-bere i-bete i-tree irrite ittiri itwere r-tree rebbit rebite rebrew reiber reiter reteer reteet retere retire retree retret retter rewere rewire ribber ribbet ribbie ribbit ribibe ribier rieber rieter riette rietti rititi ritter t-tree te-wit tebbit teebee teetee teeter teewit teirei terete teribe terrer terret terrie territ terter tertre tetete tetter tibbit tiber- tibere tiberi tibert tibeti tibiri tibrie tierer tieret tiete tietie tirret tirrit tirwit titbit titiri tittee titter tittie treete treewe tretee tretie trette trewit tribit triibe triter twibit webber webbie webbii weebit weerie weewee weiete weiter weiwei wereit werrei werrie werrit wertew wetere weteri wetter wewere wietie wirier wirrie wittee witter wreitt wrette writee writer