-tree eeeee eepee ekers ekker epees eppes erept erere eresk erest erets erres erses erste ersts erte erter ertes esere esker esp-r esper espre esser esses essse estee estep ester estes estet estre eteke etest etete etree etrek etres etter ettes k-p-r k-set keeks keepe keeps keere keest keets keppe kerek kerep keres keret kerre kerrs kerse kersp kerss keser kesse keste ketek keter kette kreek kreep krees kreke krepe kreps kresk kress krest krete p-rep peeke peeks peeps peere peers peert peese peesk peest peete peets pekes peket pekre pepee pepes peppe pepst pept- perer peres peret perke perks perps perre perse persp perst perte pesek peses peske pesse peste pests peter petes petr- petre pette petts ppers pre-k prees preke preps prese press prest prete pssst pssts pter- ptere pters ptpre ptprk ptprr ptprs ptprt reeks reepe reere reese reesk reest rekke repet reppe repps reprt repts rere- reree reres reret resee reses reset reske resse reste restr rests retee reter retes rette retts rrsps rt-rk seeke seeks seeps seere seers seese seest seete seker sekes sekke sepet sept- septs serer seres seret serke serpe serps serre serse serss sert- serte serts seser seses sesse seste setee seter setse sette setts skeer skees skeet skepe skepp skeps skere skers skete skrte speek speer spees speet speke spekt spere sperk sperr spert spete spets spree spres spret sssss steek steep steer stees steet steke step- stepe stepp steps stept stere sterk sterr sters stert stete stets stker stree strek strep stret strrs sttep teepe teers teese teest teets tekes teket tekke tepee tepes tepet tepke terek teres teret terps terre terrs terse tersk tert- tespe tesse teste tests teter tetes tetr- tette tpkes tppts treer trees treet treks trepp trept trere tres- trese tress trest trete trets trett trsek tsere tsets ttest ttttt