-er eee eef eeo eer eet ef- efe eff efo efr eft eo- eoe eof eoo eor eot ere erf ero err ert erz ete etf eto etr ett etz eze ezf ezo ezr ezz fee fef feo fer fet fez ffe fff ffo ffr fft ffz foe fof foo for fot foz fre frf fro frr frt fte ftf fto ftr ftt ftz oee oef oeo oer oet of- ofe off ofo ofr oft ofz oo- oof ooo oor oot or- ore orf oro orr ort orz ot- ote otf oto otr ott otz oze ozo ozt ozz re- ree ref reo rer ret rez rfe rff rfo rfr rft rfz roe rof roo ror rot roz rrf rrr rrt rte rtf rto rtr rtt rtz rze rzo te- tee tef teo ter tet tez tfe tff tfo tfr tft to- toe tof too tor tot toz tre trf tro trr trt trz tte ttf tto ttr ttt tze tzf zee zef zeo zer zet zez zfr zo- zoe zof zoo zor zot zro zte ztr zzr zzt zzz

eeee eefe eero eete eeze efeo efet efor eft- efze eore eoto erer eret erez erft eroe eroo erre erro ertz etee eter etfe etoe etre etro ette etto ezer ezzo feer feet fefe feff fefo feof fere fero ferr fert ferz fete fetr fett ffee ffff ffrr fftf foer fofo foof foot for- fore foro forr fort fote foto fott free freo fret froe frot fter fzzt o-eo oere oetz ofer off- offe offo offr ofor ofoz ofre ooer ooff oooo oore oort ooze ore- oreo orer orfe orff oro- oroe orof oror orot oroz orro orte orto orzo otee oter oto- otoe otof otoo otor otre otro otte otto ozee ozer ozet reef reet refe reff refr reft reof reot rere rero rert rete reto retr rett retz reze rfef roer roet rofe roff rofo roof roor root rooz rore roro rort rote roto rotr rott roze rozz rrrr rtee teef teer teet teez teff teft teor teoz ter- tere terf tero terr tete teto tetr tett tetz tezz tfot toee toer toet toff tofo toft toof toor toot tore torf toro torr tort tote toto totr tott toze tozo tre- tree tref treo tret trez trfr troe troo trot trte trtr tteo tter ttff ttoe tttt tzzt z-ro zeff zerf zero zert zete zeto zeze zoet zoff zoo- zoot zore zoro zort zote zott zotz zozo zrze zzzz

-tree eeeee efere efetf effer effet efore efter eofor eorre erere eretz eroor erore eroto error erte erter etete etoro etree etter feeor feere feeze fefor feoff feret feroz ferr- ferre ferro ferte feter feto- fetor fette foetz foore foote fore- foreo foret forez forro forte forto forze fotte freer freet frere frett froot frore frote froze ftrtt o-fer offer offof offre offto ofoto ofter oo-er ooooo oreo- orere orero orfeo orfoe orfor oroer orret orter ortet ortoo ortze otere otero ototo otter ozero ozoro reefe reeft reere reetz reeze refer refet reffe reffo rere- reree reret rerez retee reter retro rette retto rezzo ro-ro roero roffe rofor rooer roofe rooft roore roote rorer roter roto- rotor rotot rotte rotto rotz rotzo rozet tefe teret teror terre terro tert- terzo teter tetr- tetro tette toeof toerr toeto tofet toffo tofor tofte toore tooze toreo toret torez torre torro torte torto toter toto- totoe totoo totte tozee tozer treer treet trefe treff trere trete trett troee trofe troff troft trooz trott ttttt tzere tzero z-ter zeero zeror zerre zerto zetor zfeet zfort zorro zotto zzzzz

effere effete effoff effore effort efreet efter- eototo eroto- errett etoeot etrez ettore f-zero feeror feetof feofor ferez ferfer feroze ferrer ferret ferrez ferro- fertee ferter fetter fetzer foerre foeto- foetor foofoo footer foozer forrer forrot fortee forter freeez freeof freeto freeze frefre frette froofe fterer fterre oerter oferre offeet oftfor oofotr oooooo ottoor ozette ozzero r-tree reefer reeffe refeet refeff refert refete refoot refret refter reroof reroot reteer reteet reteoo retere retore retort retree retret retro- retrot retter roofer rooter rootof rootte roozer rorter rotter rozzer t-tree t-zero teeoff teetee teeter terete terfez terreo terrer terret terror terrot terter tertre terzet tetete tetter to-fro toetoe toffee tofore toofer tooter tootoo toozoo torero torfer tororo torret tortor totoro totrot totter tozero treeof treete trefet trefor trefot trefte tretee trette troffe trooze trotro trotte tzetze zertz zezere zoozoo zorzor zotero

eeeroer errorof ezeroto feoffee feoffer feoffor feretto ferrere ferrero foo-foo footrot forfere forfete forfree forfret forroot fortore freefor freeter freezer fretter off-off offeree offerer offeror ofzorro orzotto ottetto ottrott reefort refeoff referee referer referto refrete refroze reoffer rerefer reteere reterre retrete rettert rettore rootfor rootrot tee-off terere tereto- terreer terrere tettete to-fere to-fret toe-toe too-too toreoff torfere torrert tototoo treetee trefoot trettre tro-tro troffer trotoff trottee trotter

erezee feeoffee ferreter ferrette ferretto fetterer forefeet forefoot forereef freeotfe froterer ofterror referree referrer refreeze retorter rooftree teetoter terzetto toetotoe toottoot torotoro totterer treefort treefree treeroot treffort trezerer zerofeet zerozero

errorfree fetterfoe fore-foot fortoffee retrotort roof-tree rotrooter rozerotte tortoreto zero-zero

eforeffort ferretfeet rotorooter toe-to-toe

footforfoot roto-rooter toro-ferrer

teetertotter

teeter-totter tetter-totter