-er eee eef eek eer eet ef- efe eff efr eft eke ekf ekr ekt ere erf erk err ert ete etf etk etr ett fee fef fek fer fet ffe fff ffk ffr fft fkf fkk fkt fre frf frk frr frt fte ftf ftk ftr ftt k-t ke- kee kef kek ker ket kff kke kkk kkr kkt krf krk krr krt kte ktf ktk ktr ktt re- ree ref rek rer ret rfe rff rfk rfr rft rke rkf rkk rkt rrf rrk rrr rrt rte rtf rtk rtr rtt te- tee tef tek ter tet tfe tff tfk tfr tft tke tkk tkr tkt tre trf trk trr trt tte ttf ttk ttr ttt

eeee eefe eeke eete efet efke eft- ekek eker eket erer eret erft erke erre etee eter etfe etre ette f--k feek feer feet fefe feff feke fere ferk ferr fert fete fetr fett ffee ffff ffrr fftf free fret fter keef keek keer keet keff kefr keft keke ker- kere kerf kerk kerr kert ket- kete ketf ketk ketr kett kfer kfff kffk kfre kfrr kfte kftk kftt kkfr kkft kkkk kkre kkrf kkrk kkrr kkrt kktk kree kref krek kret krfe krff krft krke krkk krkr krre krrf krrk krrr krrt krtk krtr ktee ktek ktke ktkk ktkr ktkt ktre ktrf ktrk ktrr ktrt kttf kttk kttr kttt reef reek reet refe reff refr reft reke rekt rere rert rete retr rett rfef rkkf rrrr rtee teef teek teer teet teff teft teke ter- tere terf terk terr tete tetr tett tre- tree tref trek tret trfr trte trtr tter ttff tttt

-tree eeeee efere efetf effer effet efter ekker erere erte erter eteke etete etree etrek etter feere feret ferr- ferre ferte feter fette freek freer freet freke frere frett ftrtt keefe keere kefee kerek keret kerre ketek keter kette kreef kreek kreke krete reefe reeft reere refer refet reffe rekke rere- reree reret retee reter rette rt-rk tefe teket tekke terek teret terre tert- teter tetr- tette treer treet trefe treff trere trete trett ttttt

effere effete efreet efter- errett fekete ferfer ferrer ferret fertee ferter fetter frefre frette fterer fterre k-tree keefer keeffe keeker kereft kerker kertee ketter krefft kreker kretek r-tree reefer reeffe reeker refeet refeff refert refete refret refter reteer reteet retere retree retret retter t-tree teetee teeter terete terrer terret terter tertre tetete tetter treete trefet trefte treker tretee trette

ekekete ferrere freeter fretter kee-kee kreeker referee referer refrete rerefer reteere reterre retrete rettert terere terreer terrere tettete treetee trekker trettre

ferreter ferrette fetterer ketterer referree referrer teketeke treefree

keek-keek

ferretfeet