b-tree bbbbbb bebite beebee beefer beegee beeter befree befret begbie begger begift begirt beiber beiger berbee berber bereet bereft berege berere berger bergie berrer berret berrie bertie bertre betere betete betire bettee better bettie bibber biberg bibiri bieber bierge bigbee bigbet bigger biggie biggit bigrig birger birgit birgte biribi biteit bitier bitrig bitter bittie breefe breege breere breger bregge breite brette bribe- bribee briber bribir bribri briefe brigge brigit ebbert ebr-ii ebrie eebree eerier effeir effere effete efreet efter- egbere egbert egerie eggert eggier eibert eifert eirigi er-rif erbree erebti errett etgert etiger febri- feerie feifer feirie ferber ferfer fergee fergie fergit ferier ferrer ferret ferri- ferrie fertee ferter fertig fetter fibber fieber fiebre fiefie fierte fiftie figger firret fitbit fitter fittie fittig fittit frebie frefre fregit freire frette fterer fterie fterre gbegbe gebbet gebbie gebbit gebert geegee gegger geggie geiger gerber gerege gereri gergei gerger gerret gerrie gerrit gertie gertte getfit getter gettie gibber gibbet gibbit gibert gibett gibier gibret giftee gifter giftie gigger gigget giggit gigiri gitige gitter gittie greefe greete greffe greger gregge gregre greife greiff greige greter grette griebe griefe grieff griege griffe grifte grigri gteter i-beft i-bere i-bete i-free i-tree if-bet iffier ifiget ifreet igbere igbeti igeret igetit igf-ii igreet irrite ittiri r-tree rebbit rebite reefer reeffe refeet refeff refert refete refire refrei refret refter regeti reggie regift regret reiber reiter reteer reteet retere retief retire retree retret retrig retter rettig ribber ribbet ribbie ribbit ribibe ribier rieber rieger rieter riette rietti riffer rififi rifter rigett rigger rigget rititi ritter t-tree tebbit teebee teetee teeter tefibi teirei terete teribe terrer terret terrie terrif territ terter tertre tetete tetter tibbit tiber- tibere tiberi tibert tibeti tibiri tibrie tiefer tierer tieret tiete tietie tiff-f tigger tirret tirrit titbit titfer titiri tittee titter tittie treete trefet trefte treget treife tretee tretie trette tribit trifet triger trigit triibe triigi triter