b-tree bbbbbb bebite beebee beefer beeter befree befret behefe beheft behete behite behter beiber berbee berber bereet bereft berere berhet berith berrer berret berrie berthe bertie bertre betere betete betire bettee better bettie bibber bibiri bieber biheet biribi birthe biteit bitier bitter bittie breefe breere breeth breite brethe brette bribe- bribee briber bribir bribri briefe bthree ebbert ebbeth ebr-ii ebrie eebree eerier effeir effere effete efreet efter- efther eibert eifert either er-rif erbree erebti erfeth erreth errett ethere ethete ethier febri- feerie feerth feifer feirie feithe ferber ferfer ferier ferrer ferret ferri- ferrie fertee ferter ferthe fether fethre fetter ffrith fibber fieber fiebre fiefie fierte fiftie fireth firret fitbit fitter fittie fittit frebie freeth frefre freire freith frette frieth fterer fterie fterre ftireh hebete heebee heebie heehee heeter heffer hefter hehehe hehheh heibri heifer heirie herber herbet herbie herbri hereft hereti herher herier herire herrie herter herthe hertie heter- hether hetire hetter hibhib hierer hififi hirter hither hithte hitite hittee hitter hitthe i-beft i-bere i-bete i-free i-tree if-bet iffier ifhebe ifreet iherir ihitit irrite ittiri r-tree rebbit rebite reefer reeffe refeet refeff refert refete refire refrei refret refter rehber rehete rehire reiber reiter reteer reteet retere rether retief retire retree retret retter ribber ribbet ribbie ribbit ribibe ribier rieber rieter riette rietti riffer rififi rifter rither rititi ritter t-tree te-hee tebbit tebeth teebee teehee teerth teetee teeter teethe tefibi tehiri teirei terete teribe terihi terrer terret terrie terrif territ terter tertre tetete tethee tether tetteh tetter thebit theefe thefbi thefth theire theref therei therhi theri- thetee thethe thibet thibie thieft thiete thifte thirre thithi threet threfe threff threit threte thrett thrief thrift tibbit tiber- tibere tiberi tibert tibeti tibiri tibrie tiefer tierer tieret tiete tiethe tietie tiff-f tireth tirret tirrit titbit titfer tither titiri tittee titter tittie treete trefet trefte trehet treife tretee tretie trette tribit trieth trifet triibe triter