-er eee eef eek eer eet ef- efe eff efr eft eke ekf ekr ekt eku ere erf erk err ert eru ete etf etk etr ett etu eu- eue euf eur eut fee fef fek fer fet feu ffe fff ffk ffr fft ffu fkf fkk fkt fre frf frk frr frt fru fte ftf ftk ftr ftt ftu fue fuf fuk fur fut fuu k-t ke- kee kef kek ker ket kff kfu kke kkk kkr kkt kku krf krk krr krt kru kte ktf ktk ktr ktt ktu kue kuk kur kut kuu re- ree ref rek rer ret reu rfe rff rfk rfr rft rfu rke rkf rkk rkt rku rrf rrk rrr rrt rru rte rtf rtk rtr rtt rtu rue ruf ruk rur rut ruu te- tee tef tek ter tet teu tfe tff tfk tfr tft tfu tke tkk tkr tkt tre trf trk trr trt tru tte ttf ttk ttr ttt ttu tue tuf tuk tur tut tuu uee uef uer uet ufe uff ufr uft ufu uke ukf ukk ukr uku ur- ure urf urk urr urt uru ute utf utk utr utt utu uue uur uut uuu

eeee eefe eeke eete eetu efet efke eft- eftu ekek eker eket ekur erer eret erft erke erre ertu erur etee eter etfe etre ette ettu euer eur- eure eurt f--k feek feer feet fefe feff feke fere ferk ferr fert feru fete fetr fett fetu ffee ffff ffrr fftf free fret frue fter fuet fuff fufu fuke fukk fuku fur- fure furr furt fute futu keef keek keer keet keff kefr keft keke keku ker- kere kerf kerk kerr kert keru ket- kete ketf ketk ketr kett ketu keur kfer kfff kffk kfre kfrr kfru kfte kftk kftt kftu kfut kkfr kkft kkkk kkre kkrf kkrk kkrr kkrt kktk kktu kkut kkuu kree kref krek kret kreu krfe krff krft krke krkk krkr krku krre krrf krrk krrr krrt krtk krtr krue kruf kruk krur ktee ktek ktke ktkk ktkr ktkt ktku ktre ktrf ktrk ktrr ktrt ktru kttf kttk kttr kttt kttu ktuf kuek kueu kuff kufr kuke kukk kuku kure kurk kurr kurt kuru kute kutf kutr kutt kutu kuuk kuur kuuu reef reek reet refe reff refr reft refu reke rekt rere rert reru rete retr rett reue reuf reuk reut reuu rfef rkkf rrrr rtee ruer ruet rufe ruff ruft ruke rukk ruku rure ruru rute rutt rutu teef teek teer teet teff teft teke ter- tere terf terk terr teru tete tetr tett tetu teuk teut tre- tree tref trek tret treu trfr trte trtr true truk trut truu tter ttff tttt tuer tuet tufe tuff tuft tufu tuke ture turf turk turr turt turu tute tutt tutu ufer uffe ufuk ukek ukeu ukur ure- uret urfe urff urft urke urre urte uruk urur urut uter uttu uutf uuuu

-tree eeeee ef-tu efere efetf effer effet efter efuru efutu ekker ekuku ekuru erere errtu erte erter eruke eteke etete etree etrek etter eturu eurre feere feret ferr- ferre ferte feter fette feuer feute freek freer freet freke frere frett freur frute ftrtt fu-fu futur k-ute keefe keere kefee kerek keret kerre kertu ketek keter kette kreef kreek kreke krete kreuk kruft kukur kurek kurku kurre kurte kuruk kutte kuttu kutur reefe reeft reere refer refet reffe refut rekke rere- reree reret retee reter rette reuer reuet reute rt-rk ruere ruete ruffe rukke ruter rutte ruutu tefe teket tekke terek teret tereu terre tert- teter tetr- tette treer treet trefe treff trere trete trett treut truer truff truke trute ttttt tuffe tufte tukur turek turet turku turre turtu turut tutee tutku tutte tuuru ufere ukeke ukert urker urkut urter urutu uter- utter uttur uturu uuuuu

effere effete effutu efreet efter- erfurt erketu errett ettutu eutere fekete ferfer ferrer ferret ferrur fertee fertek ferter fetter feture feuter frefre frette freure fterer fterre fuerte furfur furrer furrfu futret futter future k-tree keefer keeffe keeker kekkut kereft kereru kerker kerkuk kertee ketter ketuke keuruu krefft kreker kretek kukere kurree kururu kutke kutter r-tree reefer reeffe reeker refeet refeff refert refete refret refter refute rekrut reteer reteet retere retree retret retter rettur returf returu reuere reuter reutte rufete ruffer ruffet rufter rukutu rurkee rurutu ruttee rutter t-tree teetee teeter tekrur terete terrer terret terter tertre tetete tetter treete trefet trefte treker tretee trette tretuk truett trufte truker tuffet tufter tuktuk turfer turker turret turtuk turtur tururu tuteur tutter tuttut ufreet ureter urette uruffe uteute utukku utukur

ekekete erukkur ferrere ferrure freeter fretter furrure futerer futureu kee-kee kreeker kurkure referee referer refrete refuter rekeure rerefer reteere reterre retrete rettert reutter terere terreer terrere tettete treetee trekker trettre tuk-tuk tut-tut utterer

ferreter ferrette fetterer feuterer ketterer kukukuku kukuruku kurukuru referree referrer rekeuere teketeke teruteru treefree treffurt tukutuku

keek-keek ruff-tree teuf-teuf tuff-tuff tuku-tuku

ferretfeet kukkurukuu terukkuttu