-er eee eef eek eeo eer eet ef- efe eff efo efr eft eke ekf eko ekr ekt eo- eoe eof eok eoo eor eot ere erf erk ero err ert ete etf etk eto etr ett fee fef fek feo fer fet ffe fff ffk ffo ffr fft fkf fkk fkt foe fof fok foo for fot fre frf frk fro frr frt fte ftf ftk fto ftr ftt k-t ke- kee kef kek keo ker ket kff kfo kke kkk kkr kkt koe kof kok koo kor kot krf krk kro krr krt kte ktf ktk kto ktr ktt oee oef oeo oer oet of- ofe off ofo ofr oft oke okk oko okr oo- oof ook ooo oor oot or- ore orf ork oro orr ort ot- ote otf otk oto otr ott re- ree ref rek reo rer ret rfe rff rfk rfo rfr rft rke rkf rkk rko rkt roe rof rok roo ror rot rrf rrk rrr rrt rte rtf rtk rto rtr rtt te- tee tef tek teo ter tet tfe tff tfk tfo tfr tft tke tkk tko tkr tkt to- toe tof tok too tor tot tre trf trk tro trr trt tte ttf ttk tto ttr ttt

eeee eefe eeke eero eete efeo efet efke efor eft- ekek eker eket eore eoto erer eret erft erke eroe eroo erre erro etee eter etfe etoe etok etre etro ette etto f--k feek feer feet fefe feff fefo feke feko feof fere ferk fero ferr fert fete fetr fett ffee ffff ffrr fftf foer fofo foke foof fook foot for- fore fork foro forr fort fote foto fott free freo fret froe frot fter keef keek keer keet keff kefr keft keke keko keok ker- kere kerf kerk kero kerr kert ket- kete ketf ketk keto ketr kett kfer kfff kffk kfok kfoo kfor kfre kfro kfrr kfte kftk kftt kkfr kkft kkkk kkoo kkor kkot kkre kkrf kkrk kkro kkrr kkrt kktk kofe koff kofk kofo koft koke kokf kokk koko kokr kook kooo koor koot kore korf kork koro korr kort kote kotk koto kotr kott kree kref krek kreo kret krfe krff krfo krft krke krkk krko krkr kroe krof krok kroo kror krre krrf krrk krro krrr krrt krtk krto krtr ktee ktek ktfo ktke ktkk ktko ktkr ktkt ktoe ktok ktoo ktor ktot ktre ktrf ktrk ktro ktrr ktrt kttf kttk ktto kttr kttt o-eo oere ofek ofer off- offe offo offr ofor ofre oker oket okko okok okor okot okre okro okto ooer ooff oooo oore oort ore- orek oreo orer orfe orff orke orko oro- oroe orof orok oror orot orro orte orto otee oter oto- otoe otof otok otoo otor otre otro otte otto reef reek reet refe reff refr reft reke reko rekt reof reot rere rero rert rete reto retr rett rfef rkkf roer roet rofe roff rofo roke rokk roko rokr roof rook roor root rore rork roro rort rote rotk roto rotr rott rrrr rtee teef teek teer teet teff teft teke teok teor ter- tere terf terk tero terr tete teto tetr tett tfot tkof toee toek toer toet toff tofo toft toke toko toof took toor toot tore torf tork toro torr tort tote toto totr tott tre- tree tref trek treo tret trfr troe troo trot trte trtr tteo tter ttff ttoe tttt

-tree eeeee efere efetf effer effet efore efter ekeko ekker ektor eofor eorre erere erkko eroor erore eroto error erte erter eteke etete etoko etoro etree etrek etter feeor feere fefor feoff feret ferr- ferre ferro ferte feter feto- fetor fette fokke fokto foore foote fore- foreo foret forro forte forto fotte freek freer freet freke frere frett froot frore frote ftrtt keefe keere kefee kerek keret kerre ketek keter keto- kette ketto ko-ko kofte koker koket kokko kokor kokot kokre korek korff korke koror korro korte kotor kotto kre-o kreef kreek kreke kreo- krete kroft kroke kroot krtok o-fer offek offer offof offre offto ofoto ofter okeke okere oketo okker okoro oo-er ooooo oreo- orere orero orfeo orfoe orfor oroer oroke orret orter ortet ortok ortoo otere otero ototo otrok otter reefe reeft reere refer refet reffe reffo rekke rere- reree reret retee reter retro rette retto ro-ro roero roffe rofor rokee roker roket rokke rokkk rokot rokto rooer roofe rooft rooke roore roote rorer rorke roter rotko roto- rotor rotot rotte rotto rt-rk teeko tefe teket tekke tekko terek teret terok teror terre terro tert- teter tetr- tetro tette toeof toerr toeto tofet toffo tofor tofte toker tokke tokko toko- tokor tooke toore toreo toret torke torok torre torro torte torto toter toto- totoe totok totoo totte treer treet trefe treff trere trete trett troee trofe troff troft troke trott tteok ttttt

effere effete effoff effore effort efreet efter- ekero eototo eroto- errett etoeot ettore feeror feetof fekete feofor ferfer feroke ferrer ferret ferro- fertee fertek ferter fetter foerre foeto- foetor fokker foofoo fooker footer forker forket forrer forrot fortee forter freeof freeto frefre frette froofe fterer fterre k-tree keefer keeffe keeker keokee kereft kerker kertee kertok ketter koffee kokoro kokott kookoo kootoo koreke korere korero korkor kororo korrek kotoko kotter kottke krefft kreker kretek krokek kroket krotte ktetor oerter oferre offeet oftfor okeefe okerer oofotr ookroo oooooo ottoor r-tree reefer reeffe reeker reekof refeet refeff refert refete refoot refret refter reroof reroot reteer reteet reteoo retere retook retore retort retree retret retro- retrot retter rokete rokker rokket rokkor roofer rooker rooter rootof rootte rorek rorter rotork rotter t-tree teeoff teetee teeter teketo terete terreo terrer terret terror terrot terter tertre tetete tetter to-eke to-fro toetoe toffee tofore toofer tookto tooter tootoo torero torfer torker tororo torret tortor totoro totrot totter treeof treete trefet trefor trefot trefte treker tretee trette troffe troker trotro trotte

eeeroer ekekete errorof feoffee feoffer feoffor feretto ferrere ferrero foo-foo footrot forfere forfete forfree forfret forroot fortore freefor freeter fretter kee-kee koorete kor-kor korkoro korokke korrekt kottoor kreeker