-tree e-fit eeeee eepee eerie eetti efere eferi efetf effer effet effie efrei efter eipri eirie eiter eitri eppie eptfe erept erere erier eriff erite erixx erte erter etete etext etite etree etter ettie exept exert exite exper exptr exter extre feere feier feret ferie ferit ferr- ferre ferri ferte feter feti- fetii fetir fette fexpr ffxii fieee fieri fifer fifie firee firei firer firie firit firre fitit fitri fitte fixer fixie fixit freei freep freer freet freex freir freit frere frett frier fripp frite fritt frixe ftrtt ieiri iepe ieper ierei iette if-- ifere iffet ifrit ifttt iiiee iiiii iitti iperf ipeti ipiti ippee ippei iprex irete irite irpex irrep irrit itete itext itfet itfit itire itrip itter ittre ittti p-rep peere peeri peert peete peire peirt peixe pepee peppe peppi pept- perer peret peri- perie perit perre perri perte perti peter petie petit petr- petre petri pette petti pexip piere pieri piert piiri piper pipet pipex pipit pippi pipri pirex pirie pirix pirre pirri piter pitie pitip pitre pitri pitti pixie ppxii preef preff preie preif prete preti prief prier prife priit prite priti pritt pter- ptere pteri ptpre ptprf ptprr ptprt reefe reeft reepe reere reeti refer refet reffe refit refix reiff repet repit reppe reprt rere- reree reret rerip rerir retee reter retex retie retip rette rexer ri-fi riefe rieti rifer riife riper ripit rippe ririe rperf rripe rtext t-rex teepe tefe teffi tepee tepet tepit teret terex terif terre terri tert- teter tetex tetr- tetri tette texte tfifx ti-ti tieit tiere tieri tierp tiexi tiffe tiifp tiper tipet tipit tippi tiree tirer tiret tirit titer titii titre titte titti tixte treer treet trefe treff treie treif treip treit treix trepp trept trere treri trete trett triei trier triet trife triip tripe tripi tripp tript trit- trite tritt ttttt xerif xerte xetex xexex xfire xtext xtree xxiii xxxii xxxix