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eeee eefe eero eete eetu eeze efeo efet efor eft- eftu efze eore eoto erer eret erez erft eroe eroo erre erro ertu ertz erur etee eter etfe etoe etre etro ette etto ettu etuz euer eur- eure euro eurt ezer ezuz ezzo feer feet fefe feff fefo feof fere fero ferr fert feru ferz fete fetr fett fetu ffee ffff ffrr fftf foer fofo foof foot for- fore foro forr fort fote foto fott four fout free freo fret froe frot frou frue fruz fter fuet fuff fufu fuor fur- fure furo furr furt fute futo futu futz fuze fuzz fzzt o-eo oere oetz oeuf ofer off- offe offo offr offu ofor ofoz ofre ofuz ooer ooff oooo oore oort ooze ore- oreo orer orfe orff orfu oro- oroe orof oror orot oroz orro orte orto orzo orzu otee oter oto- otoe otof otoo otor otre otro otte otto ottu otur ouer oufe ouff our- oure ouro ourt out- oute outo ouu- ouze ouzo ozee ozer ozet reef reet refe reff refr reft refu reof reot reou rere rero rert reru rete reto retr rett retz reue reuf reut reuu reze rezu rfef roer roet rofe roff rofo roof roor root rooz rore roro rort roru rote roto rotr rott roue rouf rout rouz roze rozz rrrr rtee ruer ruet ruez rufe ruff rufo ruft rure ruro ruru rute ruto rutt rutu ruze teef teer teet teez teff teft teor teoz ter- tere terf tero terr teru tete teto tetr tett tetu tetz teut tezu tezz tfot toee toer toet toff tofo toft tofu toof toor toot tore torf toro torr tort toru tote toto totr tott tour tout toze tozo tre- tree tref treo tret treu trez trfr troe troo trot trou trte trtr true trut truu tteo tter ttff ttoe tttt tuer tuet tufe tuff tufo tuft tufu tuor ture turf turo turr turt turu tute tuto tutt tutu tuuo tuzu tuzz tzur tzut tzzt uetz ufer uffe uofo uor- uore ure- uret urfe urff urft uro- uroo urre urte urur urut uruz uter utfo utor utto uttu uutf uuuu uzer z-ro zeff zerf zero zert zete zeto zeze zoet zoff zoo- zoot zore zoro zort zote zott zotz zozo zozu zrze zuft zuoz zurf zurr zuru zuzu zzzz

-tree eeeee ef-tu efere efetf effer effet efore efter efuru efutu eofor eorre erere eretz eroor erore eroto error errtu erte erter etete etoro etour etree etter eturu euro- eurre euzet feeor feere feeze fefor feoff feret feroz ferr- ferre ferro ferte feter feto- fetor fette feuer feute foetz foore foote fore- foreo foret forez forro forte forto forur forze fotte fotur fouee fouet foure fouro freer freet frere frett freur froot frore frote froze frute fruto frutz ftrtt fu-fu fuero furo- furor furze futur fuzee fuzer fuzze o-fer offer offof offre offto ofoto ofour ofter oo-er ooooo oreo- orere orero orfeo orfeu orfoe orfor oroer orout orret orter ortet ortoo ortze oruro orutu otere otero ototo otour otter ottur oture ouert ouoro oure- outer outof outre outro outto ozero ozoro reefe reeft reere reetz reeze refer refet reffe reffo refut rere- reree reret rerez retee reter retro rette retto reuer reuet reute reuze rezzo ro-ro roero roffe rofor rooer roofe rooft roore roote rooue rorer roter roto- rotor rotot rotte rotto rotz rotzo rouer rouet rouez roufe roure route routt rouze rozet ruere ruete ruetz ruffe ruffo rufo- ruter rutte ruutu tefe teret tereu teror terre terro tert- teruo terzo teter tetr- tetro tette teuto toeof toerr toeto tofet toffo tofor tofte toore tooze toreo toret torez torre torro torte torto tortu torue toter toto- totoe totoo totte toure touro toute touze tozee tozer treer treet trefe treff trere trete trett treut troee trofe troff troft trooz trott troue trout truer truff truro trute ttttt tuero tuffe tufte tuotu turet turot turre turro turtu turut turze tutee tuteo tutor tutte tutto tuuru tzere tzero tzute uetze ufere ufofu uouee ureo- urour urroz urter urutu urzut uter- utero utro- utror utter uttur uturu ututo utzoo uuuuu uzere z-out z-ter zeero zeror zerre zerto zetor zetou zeuet zfeet zfort zorro zotto zu-zu zufre zzzzz

e-four effere effete effoff effore effort effutu efreet efter- eototo erfurt eroto- errett errour etoeot etrez ettore ettutu euroto eururo eutere f-zero feeror feetof feofor ferez ferfer feroze ferrer ferret ferrez ferro-