-tree eeeee eepee eerie eetti eipri eirie eiter eitri eppie epure erept erere erier erite eritu errtu erte erter erupt etete etite etree etter ettie eturu eurre ieiri iepe ieper ierei iette iiiee iiiii iitti iperu ipeti ipiti ippee ippei irete irite irrep irrit irupi itete itire itrip itter ittre ittti itu-r itu-t ituri ituru itutu iuput iurie p-rep peere peeri peert peete peire peirt 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 piere pieri piert pieup piiri piper pipet pipit pippi pipri pirie pirre pirri pirui piter pitie pitip pitre pitri pitru pitti piuri piuru piute preie prete preti prier priit prite priti pritt prute pter- ptere pteri ptpre ptprr ptprt ptpru pueri puett pupet puppe pupri puree purer 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 retie retip rette reuer reuet reuir reute reuti rieti riper ripit rippe ripup ririe rirpu riuer rripe ruere ruete ruiru rupee ruper rupie rupit ruter rutte ruutu teepe teeup tepee tepet tepeu tepit teppu tepui teret tereu terre terri tert- teter tetr- tetri tette ti-ti tieit tiere tieri tierp tieup tieut tiper tipet tipit tippi tippu tipup tiree tirer tiret tirit tirru tirur titer titii titre titte titti titup treer treet treie treip treit trepp trept trere treri trete trett treut triei trier triet trieu triip tripe tripi tripp tript trit- trite tritt truer truit trupt trute 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