-er -up eee eep eer ees eet ep- epe epp epr eps ept epu ere erp err ers ert eru es- ese esp esr ess est esu ete etp etr ets ett etu eu- eue eup eur eus eut p-p pee pep per pes pet peu ppe ppp ppr pps ppt ppu pre prp prr prs prt pru ps- pse psp psr pss pst psu pt- pte ptp ptr pts ptt ptu pue pup pur pus put puu re- ree rep rer res ret reu rpe rpp rpr rps rpt rpu rrp rrr rrs rrt rru rse rsp rsr rss rst rsu rte rtp rtr rts rtt rtu rue rup rur rus rut ruu se- see sep ser ses set seu spe spp spr sps spt spu sr- sre srp srr srs srt ss- sse ssp ssr sss sst ssu ste stp str sts stt stu sue sup sur sus sut suu te- tee tep ter tes tet teu tpe tpp tpr tps tpt tpu tre trp trr trs trt tru tse tsp tsr tss tst tsu tte ttp ttr tts ttt ttu tue tup tur tus tut tuu uee uep uer ues uet up- upe upp upr ups upt upu ur- ure urp urr urs urt uru use usp usr uss ust usu ute utp utr uts utt utu uue uur uus uut uuu

eeee eees eeps eers eese eete eets eetu epee eper epes eppp epps eprp eprs epsp epss epte epus erer eres eret erpe erps erre errs erse erst erts ertu erur erus esee eser eses eset espe espp esps esse essp esst essu este estp estr ests esus etee eter etes etre etsu ette ettu euer eur- eure eurt euse peep peer pees peet pepe peps per- pere perp perr pers pert peru pese pess pest pesu pete petr pets pett peur peut pper pppp ppps ppru ppss ppts pptt ppur pre- pree prep pres pret preu prps prrs prse prss prtp prtr prue prus prut pruu pspp pspr psps psrp psse psst psts pstu pter pu-e puer puet pueu pupe pups pupu pur- pure purp purr purs puru puss pust put- pute puts putt putu reep rees reet repe repp repr reps rept repu rere rers rert reru rese resp ress rest rete retr rets rett reue reup reus reut reuu rpet rpps rpts rrrr rrsp rsee rsps rsre rstp rsts rstu rtee rtes rtps rtss rttp rtts ruer rues ruet rupe rupp rupt rure rurp rurs ruru ruse russ rust rusu rute ruts rutt rutu se-e se-s se-t se-u seep seer sees seet seeu sepe sepp sepr seps sept sepu sere serp serr sers sert seru sese sess sest set- sete sets sett seur spee sper spes spet spps sprs spse spsp spss spst sptr spts spue spur spus sput sres srps srpt srsp srtp srtr ssee ssep sses sset sspe ssps sspt ssrs ssss sstp ssts stee step ster stes stet stpp stps stre strs stru stss sttr stue stup stur stus stut suee suer sues suet sueu sup- supe supp supr sups supt sur- sure surp surr surs surt suru sus- suse susp suss sust susu sute sutu suus teer tees teet tepe tepp tepu ter- tere terp terr ters teru tese tesp tess test tete tetr tets tett tetu teut tper tppp tppr tprs tpte tptp tptr tput tre- tree tres tret treu trpe trpp trps trst trte trtr true trus trut truu tses tset tsps tspt tsse tssr tsst tsts tsup tter ttss tttt tuer tues tuet tupe tups tupu ture turp turr turs turt turu tuss tust tute tuts tutt tutu u-rp uers uess uppe uppp uppu upse upup ure- ures uret urre urse urss ursu urte urts urup urur urus urut usee user uses uset uspp usps usse ussr usss usst ussu uste ustp usts usus utep uter utes uttu uuuu

-tree eeeee eepee epees epeus eppes epure erept erere erest erets erres errtu erses erste ersts erte erter ertes erupt eruts 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 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 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 ptpre ptprr ptprs ptprt ptpru puets puett pupet puppe puree purer pures purre purrs purse purte purus puter putre putt- putte putts puttu putup puurs re-up reepe reere reese reest repet reppe repps reprt repts 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 ruere ruers ruete rupee ruper rupes rupse ruses ruspe russe ruste rusts rustu ruter rutte ruutu seeps seere seers seese seest seesu seete seeup sepet sept- septs septu 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 sssss steep steer stees steet step- stepe stepp steps stept stere sterr sters stert stesu stete stets steur stree strep stret streu strrs strue strut sttep stuer stupe stupp stups sture sturt stuse stuss stute stuue 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 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