-er eee eem eer ees eet eex em- eme emm emr ems emt emu emx ere erm err ers ert eru es- ese esm esr ess est esu esx ete etm etr ets ett etu etx eu- eue eur eus eut eux ex- exe exr exs ext exu exx m-r mee mem mer mes met meu mex mme mmm mmr mms mmt mmu mmx mre mrm mrr mrs mrt mru mrx mse msm msr mss mst msu msx mte mtm mtr mts mtt mtu mtx mue mum mur mus mut muu mux mxr mxs mxu re- ree rem rer res ret reu rex rme rmm rmr rms rmt rmx rrm rrr rrs rrt rru rse rsm rsr rss rst rsu rsx rte rtm rtr rts rtt rtu rtx rue rum rur rus rut ruu rux rxr rxs se- see sem ser ses set seu sex sme smm smr sms smt smu smx sr- sre srm srr srs srt srx ss- sse ssm ssr sss sst ssu ssx ste stm str sts stt stu stx sue sum sur sus sut suu sux sxm sxs sxt sxu t-x te- tee tem ter tes tet teu tex tme tmm tmr tms tmt tmu tmx tre trm trr trs trt tru trx tse tsm tsr tss tst tsu tsx tte ttm ttr tts ttt ttu ttx tue tum tur tus tut tuu tux txe txs txt txu uee uem uer ues uet um- ume umm umr ums umt umu ur- ure urm urr urs urt uru urx use usm usr uss ust usu usx ute utm utr uts utt utu utx uue uum uur uus uut uuu uxr uxt uxu xee xem xer xes xet xeu xex xmm xmr xms xmt xmu xmx xrt xrx xsm xss xst xtm xtr xts xtx xue xus xxx

eeee eees eems eers eese eete eets eetu eext emer emes emet emeu emex emme emms emmu emre emrs emse emst emte emts emus er-x erem erer eres eret erme erms erre errs erse erst erts ertu erum erur erus esee esem eser eses eset esme esmr esmt esse esst essu este estr ests esus etee etem eter etes etre etrm etsu ette ettu etux euer eums eur- eure eurt euse exer exes exmr exrx exte extr exts exum meem meer mees meet meme memr mems memu memx mer- mere merm mers mert meru mes- mese mesr mess mest met- mete mets mett metu meum meus meux mexx mmes mmmm mmms mmse mmst mmsu mmts mmus mmxx mree mres mrse mrtm mrts mrtt msee msem msex msmm msms msmu msrt mssm mssr msst mstr msts msus mtre mtrr mtss mtst mttr mtts muee mues muet mume mumm mums mumu mure murr murs murt muru muse muss must musu mute muts mutt mutu muut muxe muxu reem rees reet reme rems rere rers rert reru rese ress rest rete retr rets rett reue reus reut reuu reux rexx rmst rmtu rrrr rrum rsee rsme rsmx rsre rsts rstu rsum rtee rtes rtex rtms rtss rtts ruer rues ruet rume rumm rums rumt rure rurs ruru ruse russ rust rusu rute ruts rutt rutu rxes se-e se-s se-t se-u se-x seem seer sees seet seeu seex seme sems semu sere serm serr sers sert seru sese sess sest set- sete sets sett setx seur seux sex- sexe sext smee smet smrt smss smte smtu smur smus smut srem sres srtr ssee ssem sses sset ssex ssrm ssrs sssm ssss ssts stee stem ster stes stet stex stms stmt stre strs stru stsm stss sttr stue stum stur stus stut stux suee suer sues suet sueu sum- sume sums sumu sur- sure surr surs surt suru sus- suse suss sust susu sute sutu suum suus sux- suxe suxt teem teer tees teet teme tems temu ter- tere term terr ters teru tese tess test tete tetr tets tett tetu tetx teut text tmtt tmux tre- tree trem tres tret treu trex trms trmu trst trte trtr true trus trut truu trux tses tset tsse tssm tssr tsst tstm tsts tsum tter ttms ttss tttt tuer tues tuet tume tums tumu ture turm turr turs turt turu tusm tuss tust tute tuts tutt tutu tuum tuxs txtr uers uess uext umer umes umet umms umsu umts umus umut ure- ures uret urex urre urse urss ursu urte urts urum urur urus urut usee user uses uset usme usmm usms usse ussr usss usst ussu uste ustm usts usus uter utes uttu uuuu uxem uxue uxus xeer xeme xemu xer- xers xert xeus xexe xmms xtsr xurs xuxu xxxx

-tree eeeee emeer emere emert emese emeus emmer emmet emtee emure erem- erere erest erets ermes erres errtu erses erste ersts erte erter ertes eruts esere esmes esser esses essex essse essue estee ester estes estet estre estur estus esure etest etete etext etree etres etter ettes eturu eum-u eurex eurre eurus euser exeem exeme exert exmes exmet exter extre extts extue exust exute m-set meees meems meemu meere meers meese meest meete meets memer memes memex memus merer meres meret merms merre merse merss merte merur merus mesee mesem meses messe meste mesue mesum mesur mesus mesut meter metes metr- metre metrx metse metsu mette metts metur metus meuer meure meuse meute mexer mmmmm mreru mrmet mt-te mt-tm mt-tr mt-tt mtree mtume muese mumme mummu mures muret mureu murex murre murru murse murum murus murut musee muser muses muset musme musts mustu muter mutes mutet mutex mutsu mutts mutum mutus muuse muxer muxes reeme reere reese reest remee remer remet remex remse remue remus remux rere- reree reres reret rerum resee reses reset resse reste restr rests resue resus retee retem reter retes retex retsu rette retts reuer reuet reume reuse reuss reute rexer rexes rmutt rsust rtems rtext ruere ruers ruete rumer rumes rumex rummu rumst rus-m ruses russe ruste rusts rustu ruter rutte ruutu seeem seeme seems seere seers seese seest seesu seete seeum semee semes semet semex semme semum semur serer