-tree eeeee eepee eerie eetti eipri eirie eiter eitri eppie epure erept erere erier erite eritu erixx errtu erte erter erupt etete etext etite etree etter ettie eturu eurex eurre exept exert exite exper exptr exter extre extue exute ieiri iepe ieper ierei iette iiiee iiiii iitti iperu ipeti ipiti ippee ippei iprex irete irite irpex irrep irrit irupi itete itext itire itrip itter ittre ittti itu-r itu-t ituri ituru itutu iuput iurie p-rep peere peeri peert peete peire peirt peixe pepee peppe peppi pept- pepup perer peret peri- perie perit perre perri perte perti perur peter petie petit petr- petre petri petru pette petti petur peure pexip piere pieri piert pieup piiri piper pipet pipex pipit pippi pipri pirex pirie pirix pirre pirri pirui piter pitie pitip pitre pitri pitru pitti piuri piuru piute pixie pixiu ppxii preie prete preti preux prier priit prite priti pritt prute pter- ptere pteri ptpre ptprr ptprt ptpru pueri puett pupet puppe pupri puree purer purex purie purre purte puter putit putre putt- putte putti puttu putup puuri re-up reepe reere reeti repet repit reppe reprt reput rere- reree reret rerip rerir retee reter retex retie retip rette reuer reuet reuir reute reuti rexer rieti rieux riper ripit rippe ripup ririe rirpu riuer rripe rtext ruere ruete ruiru rupee ruper rupie rupit ruter rutte ruutu t-rex teepe teeup tepee tepet tepeu tepit teppu tepui teret tereu terex terre terri tert- teter tetex tetr- tetri tette texte ti-ti tieit tiere tieri tierp tieup tieut tiexi tiper tipet tipit tippi tippu tipup tiree tirer tiret tirit tirru tirur titer titii titre titte titti titup tixte treer treet treie treip treit treix trepp trept trere treri trete trett treut treux triei trier triet trieu triip tripe tripi tripp tript trit- trite tritt truer truex truit trupt trute truxe ttttt tueie tueit tuire tuite tupee tuppi turei turet turie turit turre turri turtu turup turut tutee tutie tutte tutti tuuei tuuri tuuru uitti upeet upier upper uppie upput upter uptie ureit urite urter uruit urupe ururi uruti urutu uter- uteri utier utter uttur uturu uuuuu xerte xetex xexeu xexex xtext xtree xxiii xxxii xxxix