-tree bbbee be-er beber bebti beebe beeft beeri beete beffe befie befit beibi beier beife beire beite berbe berei beret berie berit berre berri berte berti betee beter betie betre bett- bette betti bibbe biber bibie bibri biebe biefe biere bieri biert bieti bifer biffi birie biter bitit bitte bitti breef breer breet breit brere brett bribe brief brier brite britt brrrr btr-t e-fit ebber ebbet ebbie ebert ebibe eeeee eerie eetti efere eferi efetf effer effet effie efrei efter eirie eiter eitri erbbe erber erere erier eriff erite erte erter etete etite etree etter ettie febre feere feier feret ferie ferit ferr- ferre ferri ferte feter feti- fetii fetir fette fiber fibr- fibre fieee fieri fifer fifie firee firei firer firie firit firre fitit fitri fitte freei freer freet freir freit frere frett frier frite fritt ftrtt i-bet ibert ibeti iebet ieiri ierei iette if-- ifere iffet ifrit ifttt iiiee iiiii iitti irbit irete irite irrit itbit itete itfet itfit itire itter ittre ittti rebbe reber rebet rebit reefe reeft reere reeti refer refet reffe refit reiff rere- reree reret rerir retee reter retie rette ri-fi ribbi riber ribet ribie riefe rieti rifer riife ririe tbeti tbtbt teber tebet tebi- tefe teffi teret terif terre terri tert- teter tetr- tetri tette ti-ti tibbi tiber tibet tieit tiere tieri tiffe tiree tirer tiret tirit titer titii titre titte titti treer treet trefe treff treib treie treif treit trere treri trete trett tribe trieb triei trier triet trife trit- trite tritt ttttt