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bbbb bbbs bbeb bbet bbhs bebb bebe beeb beer bees beet behr behs bere berr bers bert beru bes- bese besh bess best bete beth bets bett betu beur bher bhet bhhs bhrt bhur bhut bhuu breb bree brer bres bret brhs brrr brrs brsb brsr brst brue bruh brus brut bseb bsee bser bses bset bshs bsse bsts bths btrt btss bttb btus bubb bube bubs bubu buer bueu buhe buhr buhs bur- burb bure burh burr burs burt buru buse bush buss bust busu but- bute buts butt buus ebbr ebbs eber ebes ebhs ebru ebur ebus eeee eees eehs eers eese eete eeth eets eetu eheh eher eheu ehhs ehre ehte erbb erbe ereb erer eres eret erhs erhu erre errs erse ersh erst erth erts ertu erub eruh erur erus esbs esee eser eses eset eshs eshu esse essh esst essu este esth estr ests esus etbr etee eter etes eth- ethe eths etre etsu ette ettu euer eur- eure eurt euse euth hbbs hbes hbhs hbrs hbss hbtu hebb hebe hebr heeb heer hees heet hehe hehs herb here herr hers hert heru hesh hess hest hete heth hets hett hetu heue heur heus hhhh hhhs hhus hree hrhs hrtb hrte hses hset hshs hsse hste hsts hsur htet hths httr hubb hube hubs huer hues huet huhs huhu hure hurr hurs hurt huru huse hush huss hust hute huth huts hutt hutu huub huus rbbb rbbr rbbs rbhs rbss rbst rebb rebe rebs rebu reeb rees reet rehb rehe rehs reht rere rers rert reru rese resh ress rest rete reth retr rets rett reue reus reut reuu rheb rhee rhes rhet rhhs rhue rhus rrhs rrrr rsee rshs rsre rsts rstu rtee rtes rths rtss rtts rubb rube rubs rubu ruer rues ruet ruhe ruhh ruhr ruhs rure rurs ruru ruse rush russ rust rusu rute ruth ruts rutt rutu sbbs sber sbhs sbse sbst sbus se-e se-h se-s se-t se-u sebe sebs sebt seeb seeh seer sees seet seeu sehe sehr sehs serb sere serr sers sert seru sese sesh sess sest set- sete seth sets sett seur shbs shbt she- sheb shee sheh sher shes shet sheu shhh shhs shre shrs shts shub shue shur shus shut shuu sreb sres srhs srtr srub ssbr ssee sses sset sshs ssrs sssb sssh ssss sstb ssth ssts stbs stee ster stes stet sths stre strs stru stss sttr stub stue stur stus stut sub- subb subh subs suee suer sues suet sueu suhb suhr sur- sure surr surs surt suru sus- suse suss sust susu sute sutu suus tbbs tbhs tbrb tbst tebu teer tees teet tehr ter- tere terr ters teru tese tesh tess test tete teth tetr tets tett tetu teut thbs the- theb thee ther thes thet theu thre thru thse thsr thss thtb thtr thts thue thur thus tre- tree tres tret treu trhs trst trte trtr trub true trus trut truu tses tset tshb tshe tshs tsse tssr tsst tsts ttbb tter ttss tttt tubb tube tubr tubs tubu tuer tues tuet tuhs tuht tuhu turb ture turr turs turt turu tush tuss tust tute tuts tutt tutu ubbe uber ubet uers uess uher uhrs uhss uhuh urbe urbs ure- ureh ures uret urre urrh urse urss ursu urte urth urts urur urus urut usbe usbr usbs usee user uses uset ushr ushs ushu ussb usse ussr usss usst ussu ustb uste usts usus uter utes uthe uttu uuuu

-tree bbbee bbser bbuss be-er beber bebes beebe beebs beers beest beete beeth beets beeut beher behet behue berbe bereh beres beret berhe berre berru berse berte berth berts berus besee beset beshe besse beste bests besut betee beter betes bethe beths betre betrs bett- bette betts betus beuer beure beust beute beuth bheer bhees brebu breer brees breet brere brers brese bresh bress brest breth brets brett breu- brrrr brths