-er eee eef eer ees eet eex ef- efe eff efr efs eft efx ere erf err ers ert eru es- ese esf esr ess est esu esx ete etf etr ets ett etu etx eu- eue euf eur eus eut eux ex- exe exr exs ext exu exx fee fef fer fes fet feu fex ffe fff ffr ffs fft ffu ffx fre frf frr frs frt fru fse fsf fsr fss fst fsu fsx fte ftf ftr fts ftt ftu ftx fue fuf fur fus fut fuu fux fxe fxr fxs fxt fxu fxx re- ree ref rer res ret reu rex rfe rff rfr rfs rft rfu rrf rrr rrs rrt rru rse rsf rsr rss rst rsu rsx rte rtf rtr rts rtt rtu rtx rue ruf rur rus rut ruu rux rxr rxs se- see sef ser ses set seu sex sfe sff sfr sfs sft sfu sfx sr- sre srf srr srs srt srx ss- sse ssf ssr sss sst ssu ssx ste stf str sts stt stu stx sue suf sur sus sut suu sux sxs sxt sxu t-x te- tee tef ter tes tet teu tex tfe tff tfr tfs tft tfu tfx tre trf trr trs trt tru trx tse tsf tsr tss tst tsu tsx tte ttf ttr tts ttt ttu ttx tue tuf tur tus tut tuu tux txe txf txs txt txu uee uef uer ues uet ufe uff ufr ufs uft ufu ufx ur- ure urf urr urs urt uru urx use usf usr uss ust usu usx ute utf utr uts utt utu utx uue uur uus uut uuu uxf uxr uxt uxu xee xer xes xet xeu xex xfe xfs xft xfx xrf xrt xrx xss xst xtf xtr xts xtx xue xus xxx

eeee eees eefe eers eese eete eets eetu eext efes efet effs eft- efts eftu er-x erer eres eret erfs erft erfx erre errs erse erst erts ertu erur erus esee eser eses eset esfs esse esst essu este estr ests esuf esus etee eter etes etfe etre etsu ette ettu etux euer eur- eure eurt euse exer exes exrx exte extr exts feer fees feet fefe feff fere ferr fers fert feru fese fess fest fete fetr fets fett fetu feus feux fext ffee ffff ffrr ffss fftf free fres fret frex frst frue fssf fter ftrs ftse ftsr fuet fuff fufu fur- fure furr furs furt fuse fuss fust fusu fute futs futu reef rees reet refe reff refr refs reft refu rere rers rert reru rese ress rest rete retr rets rett reue reuf reus reut reuu reux rexx rfef rrrr rsee rsre rsts rstu rtee rtes rtex rtss rtts ruer rues ruet rufe ruff ruft rure rurs ruru ruse russ rust rusu rute ruts rutt rutu rxes se-e se-f se-s se-t se-u se-x seef seer sees seet seeu seex seff seft sere serf serr sers sert seru sese sess sest set- sete setf sets sett setx seur seux sex- sexe sext sfer sfss sfsu sfts sres srtr ssee sses sset ssex ssrs sssf ssss ssts stee stef ster stes stet stex stfu stre strs stru stsf stss sttr stue stuf stur stus stut stux suee suer sues suet sueu suf- suff sufr sufs sufu sur- sure surf surr surs surt suru sus- suse suss sust susu sute sutu suus sux- suxe suxt teef teer tees teet teff teft ter- tere terf terr ters teru tese tess test tete tetr tets tett tetu tetx teut text tfrs tfss tre- tree tref tres tret treu trex trfr trst trte trtr true trus trut truu trux tses tset tsse tssf tssr tsst tsts tter ttff ttss tttt tuer tues tuet tufe tuff tuft tufu ture turf turr turs turt turu tuss tust tute tuts tutt tutu tuxs txtr uers uess uext ufer uffe ufxs ure- ures uret urex urfe urff urft urre urse urss ursu urte urts urur urus urut usee usef user uses uset usfs usse ussf ussr usss usst ussu uste usts usus uter utes uttu uutf uuuu uxue uxus xeer xefe xer- xers xert xeus xexe xfer xtsr xurs xuxu xxxx

-tree eeeee ef-ts ef-tu efere efetf effer effet effts efter efuru efuse efutu erere erest erets erres errtu erses erste ersts erte erter ertes eruts esere esref esser esses essex essse essue estee ester estes estet estre estur estus esure etest etete etext etree etres etter ettes eturu eurex eurre eurus euser exert exter extre extts extue exust exute feere feers feese feets feres feret ferr- ferre ferse ferte ferus feser fesse fest- feste fests festu feter fetes fette fetus feuer feurs feute freer frees freet freex frere frese fress frest frets frett freur frust frute fruux ftest ftrtt fu-fu fuest fuffs furrs furse furst furus fusee fuser fuses fusse fuste fusts fusus futex futsu futur fuuse reefe reefs reeft reere reese reest refer refet reffe refts refus refut rere- reree reres reret resee reses reset resse reste restr rests resue resus retee reter retes retex retsu rette retts reuer reuet reuse reuss reute rexer rexes rsssf rsust rtext ruere ruers ruete ruffe ruffs rufus ruses russe ruste rusts rustu ruter rutte ruutu seere seers seese seest seesu seete sefer sefes seffe sefte seref serer seres seret serfe serff serfs serre serse serss sert- serte serts serue serut seser seses sesse seste sestu sesue setee seter setse setsf sette setts settu setus setut seuer seure seuss seute sexer sexes sexst sext- sexte sexts sexus sssss steer stees steet steff stere sterr sters stert stesu stete stets steur stree stret streu strrs strue strut stuer stufe stuff stuft sture sturt stuse stuss stute stuue suere suers suess suest suete suets sueur sufes suffe suffr suffs suftu surer sures surfs surre surte surtr surur surus suser suses susse susus sutee suter sutes sutte suttu suxst t-rex teers teese teest teets tefe teffs teres teret tereu terex terre terrs terse tert- tesse teste tests teter tetes tetex tetr- tetsu