-tree eeeee eepee ef-ts efere efetf effer effet effts efter epees eppes eptfe erept erere erest erets erres erses erste ersts erte erter ertes esere esp-r esper espre esref esser esses essse estee estep ester estes estet estre etest etete etree etres etter ettes feere feers feese feets feres feret ferr- ferre ferse ferte feser fesse fest- feste fests feter fetes fette freep freer frees freet frere frese fress frest frets frett ftest ftpfs ftrtt p-rep peeps peere peers peert peese peest peete peets pepee pepes peppe pepst pept- perer peres peret perfs perps perre perse persp perst perte peses pesse peste pests peter petes petr- petre pette petts ppers preef prees preff prefs preps prese press prest prete pssst pssts pter- ptere pters ptpre ptprf ptprr ptprs ptprt reefe reefs reeft reepe reere reese reest refer refet reffe refts repet reppe repps reprt repts rere- reree reres reret resee reses reset resse reste restr rests retee reter retes rette retts rperf rrsps rsssf seeps seere seers seese seest seete sefer sefes seffe sefte sepet sept- septs seref serer seres seret serfe serff serfs serpe serps serre serse serss sert- serte serts seser seses sesse seste setee seter setse setsf sette setts speer spees speet spere sperr spert spete spets spree spres spret sssss steep steer stees steet steff step- stepe stepp steps stept stere sterr sters stert stete stets stree strep stret strrs sttep teepe teers teese teest teets tefe teffs tepee tepes tepet teres teret terps terre terrs terse tert- tespe tesse teste tests teter tetes tetr- tette tppts treer trees treet trefe treff trefs trepp trept trere tres- trese tress trest trete trets trett tsere tsets ttest ttttt