-er eee eef eer eet ef- efe eff efr eft ere erf err ert eru ete etf etr ett etu eu- eue euf eur eut fee fef fer fet feu ffe fff ffr fft ffu fre frf frr frt fru fte ftf ftr ftt ftu fue fuf fur fut fuu re- ree ref rer ret reu rfe rff rfr rft rfu rrf rrr rrt rru rte rtf rtr rtt rtu rue ruf rur rut ruu te- tee tef ter tet teu tfe tff tfr tft tfu tre trf trr trt tru tte ttf ttr ttt ttu tue tuf tur tut tuu uee uef uer uet ufe uff ufr uft ufu ur- ure urf urr urt uru ute utf utr utt utu uue uur uut uuu

eeee eefe eete eetu efet eft- eftu erer eret erft erre ertu erur etee eter etfe etre ette ettu euer eur- eure eurt feer feet fefe feff fere ferr fert feru fete fetr fett fetu ffee ffff ffrr fftf free fret frue fter fuet fuff fufu fur- fure furr furt fute futu reef reet refe reff refr reft refu rere rert reru rete retr rett reue reuf reut reuu rfef rrrr rtee ruer ruet rufe ruff ruft rure ruru rute rutt rutu teef teer teet teff teft ter- tere terf terr teru tete tetr tett tetu teut tre- tree tref tret treu trfr trte trtr true trut truu tter ttff tttt tuer tuet tufe tuff tuft tufu ture turf turr turt turu tute tutt tutu ufer uffe ure- uret urfe urff urft urre urte urur urut uter uttu uutf uuuu

-tree eeeee ef-tu efere efetf effer effet efter efuru efutu erere errtu erte erter etete etree etter eturu eurre feere feret ferr- ferre ferte feter fette feuer feute freer freet frere frett freur frute ftrtt fu-fu futur reefe reeft reere refer refet reffe refut rere- reree reret retee reter rette reuer reuet reute ruere ruete ruffe ruter rutte ruutu tefe teret tereu terre tert- teter tetr- tette treer treet trefe treff trere trete trett treut truer truff trute ttttt tuffe tufte turet turre turtu turut tutee tutte tuuru ufere urter urutu uter- utter uttur uturu uuuuu

effere effete effutu efreet efter- erfurt errett ettutu eutere ferfer ferrer ferret ferrur fertee ferter fetter feture feuter frefre frette freure fterer fterre furfur furrer furrfu futret futter future r-tree reefer reeffe refeet refeff refert refete refret refter refute reteer reteet retere retree retret retter rettur returf returu reuere reuter reutte rufete ruffer ruffet rufter rurutu ruttee rutter t-tree teetee teeter terete terrer terret terter tertre tetete tetter treete trefet trefte tretee trette truett trufte tuffet tufter turfer turret turtur tururu tuteur tutter tuttut ufreet ureter urette uruffe uteute

ferrere ferrure freeter fretter furrure futerer futureu referee referer refrete refuter rerefer reteere reterre retrete rettert reutter terere terreer terrere tettete treetee trettre tut-tut utterer

ferreter ferrette fetterer feuterer referree referrer teruteru treefree treffurt

ruff-tree teuf-teuf tuff-tuff

ferretfeet