-tree bbbee bbser be-er beber bebes beebe beebs beeps beers beest beete beets beppe berbe beres beret berre berse berte berts besee beset besse beste bests betee beter betes betre betrs bett- bette betts breer brees breet brere brers brese bress brest brets brett brrrr btr-t ebber ebbet ebers ebert eeeee eepee epees eppes epptb erbbe erber erebs erept erere erest erets erres erses erste ersts erte erter ertes esere esp-r esper espre esser esses essse estee estep ester estes estet estre etest etete etree etres etter ettes p-rep pbers pebre peeps peere peers peert peese peest peete peets pepee pepes peppe pepst pept- perer peres peret perps perre perse persp perst perte peses pesse peste pests petbe peter petes petr- petre pette petts ppers prees preps prese press prest prete pssst pssts pter- ptere pters ptprb ptpre ptprr ptprs ptprt rebbe reber rebet rebts reepe reere reese reest repet reppe repps reprt repts rere- reree reres reret resee reses reset resse reste restr rests retee reter retes rette retts rrsps sebbe sebes sebet seebe seeps seere seers seese seest seete sepet sept- septs serbs serer seres seret serpe serps serre serse serss sert- serte serts seser seses sesse seste setee seter setse sette setts speer spees speet spere sperr spert spete spets spree spres spret srprb sssrb sssss steep steer stees steet step- stepb stepe stepp steps stept stere sterr sters stert stete stets strbe strbp streb stree strep stret strrs sttep tbsps tbtbt teber tebet teebs teepe teers teese teest teets tepee tepes tepet teres teret terps terre terrs terse tert- tespe tesse teste tests teter tetes tetr- tette tppts treer trees treet trepp trept trere tres- trese tress trest trete trets trett tsebe tsere tsets ttest ttttt