-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 erte erter etete etite etree etter ettie feere feier feret ferie ferit ferr- ferre ferri ferte feter feti- fetii fetir fette fieee fieri fifer fifie firee firei firer firie firit firre fitit fitri fitte freei freep freer freet freir freit frere frett frier fripp frite fritt ftrtt ieiri iepe ieper ierei iette if-- ifere iffet ifrit ifttt iiiee iiiii iitti iperf ipeti ipiti ippee ippei irete irite irrep irrit itete itfet itfit itire itrip itter ittre ittti p-rep peere peeri peert peete peire peirt pepee peppe peppi pept- perer peret peri- perie perit perre perri perte perti peter petie petit petr- petre petri pette petti piere pieri piert piiri piper pipet pipit pippi pipri pirie pirre pirri piter pitie pitip pitre pitri pitti 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 reiff repet repit reppe reprt rere- reree reret rerip rerir retee reter retie retip rette ri-fi riefe rieti rifer riife riper ripit rippe ririe rperf rripe teepe tefe teffi tepee tepet tepit teret terif terre terri tert- teter tetr- tetri tette ti-ti tieit tiere tieri tierp tiffe tiifp tiper tipet tipit tippi tiree tirer tiret tirit titer titii titre titte titti treer treet trefe treff treie treif treip treit trepp trept trere treri trete trett triei trier triet trife triip tripe tripi tripp tript trit- trite tritt ttttt