-tree bbbee bbser bbuss be-er beber bebes beebe beebs beeps beers beest beete beets beeut beppe beppu berbe beres beret berre berru berse berte berts berus besee beset besse beste bests besut betee beter betes betre betrs bett- bette betts betus beuer beure beust beute brebu breer brees breet brere brers brese bress brest brets brett breu- brrrr bruer brues bruet bruse bruss brust brute bsure btr-t btstu bubbe buber burbs bures buret burps burrs burru burse burst burte burts burtt burus burut buser buses busse bussu buste busts busur busut busuu buter butes butte butts butut ebber ebbet ebers ebert ebure eeeee eepee epees epeus eppes epptb epubs epure erbbe erber erebs erept erere erest erets erres errtu erses erste ersts erte erter ertes erubs erupt eruts esbus esere esp-r esper espre esser esses essse essue estee estep ester estes estet estre estur estus esure etest etete etree etres etter ettes eturu eurre eurus euser p-rep pbers pebre peebu peeps peere peers peert peese peest peete peets pepee pepes peppe pepst pept- pepup perer peres peret perps perre perse persp perst perte perur perus peses pesse peste pests pesut petbe peter petes petr- petre petru pette petts petur petus peure peurs ppers prees preps prese press prest prete preus pruss prute pssst pssts pter- ptere pters ptprb ptpre ptprr ptprs ptprt ptpru puber pubes puets puett pupet puppe puree purer pures purre purrs purse purte purus puter putre putt- putte putts puttu putup puurs re-up rebbe reber rebet rebts rebus rebut reepe reere reese reest repet reppe repps reprt repts repub repus reput rere- reree reres reret resee reses reset resse reste restr rests resue resup resus retee reter retes retsu rette retts reuer reuet reups reuse reuss reute rrsps rsust rubee ruber rubes rubup rubus ruere ruers ruete rupee ruper rupes rupse ruses ruspe russe ruste rusts rustu ruter rutte ruutu s-bus sebbe sebes sebet seebe seeps seere seers seese seest seesu seete seeup sepet sept- septs septu serbs serer seres seret serpe serps serre serse serss sert- serte serts serue serup serut seser seses sesse seste sestu sesue setee seter setse sette setts settu setup setus setut seuer seure seuss seute speer spees speet spere sperr spert spete spets speus spree spres spret sprue sprut spues spure spurr spurs spurt spuse spute sputs srprb sssrb sssss steep steer stees steet step- stepb stepe stepp steps stept stere sterr sters stert stesu stete stets steur strbe strbp streb stree strep stret streu strrs strub strue strut sttep stube stubs stuer stupe stupp stups sturb sture sturt stuse stuss stute stuue subbu suber subss subst suere suers suess suest suete suets sueur super supes supet suppe supps supre supts supur suput surer sures surpu surre surte surtr surur surus suser suses susse susus sutee suter sutes sutte suttu tbsps tbtbt tbutt teber tebet teebs teepe teers teese teest teets teeup tepee tepes tepet tepeu teppu teres teret tereu terps terre terrs terse tert- tespe tesse teste tests teter tetes tetr- tetsu tette teuts tppts treer trees treet trepp trept trere tres- trese tress trest trete trets trett treus treut trubs trubu truer trues trups trupt truse truss trust trute truus tsebe tsere tsets tsuru tsuur ttest ttttt ttusb tubbs tuber tubes tupee turbe turbt turet turps turre turse turss turst tursu turtu turup turut tutee tutte tutus tuuru uber- ubers upeet upper upput upse- upset upter urbes ursus urter urubu urupe urutu usees users usest useup usses uster ustup ustur usure usurp usutu uter- utter uttur utube uturu uuuuu