-er eee eef eeo eer eet ef- efe eff efo efr eft eo- eoe eof eoo eor eot ere erf ero err ert ete etf eto etr ett fee fef feo fer fet ffe fff ffo ffr fft foe fof foo for fot fre frf fro frr frt fte ftf fto ftr ftt oee oef oeo oer oet of- ofe off ofo ofr oft oo- oof ooo oor oot or- ore orf oro orr ort ot- ote otf oto otr ott re- ree ref reo rer ret rfe rff rfo rfr rft roe rof roo ror rot rrf rrr rrt rte rtf rto rtr rtt te- tee tef teo ter tet tfe tff tfo tfr tft to- toe tof too tor tot tre trf tro trr trt tte ttf tto ttr ttt

eeee eefe eero eete efeo efet efor eft- eore eoto erer eret erft eroe eroo erre erro etee eter etfe etoe etre etro ette etto feer feet fefe feff fefo feof fere fero ferr fert 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 o-eo oere ofer off- offe offo offr ofor ofre ooer ooff oooo oore oort ore- oreo orer orfe orff oro- oroe orof oror orot orro orte orto otee oter oto- otoe otof otoo otor otre otro otte otto reef reet refe reff refr reft reof reot rere rero rert rete reto retr rett rfef roer roet rofe roff rofo roof roor root rore roro rort rote roto rotr rott rrrr rtee teef teer teet teff teft teor ter- tere terf tero terr tete teto tetr tett tfot toee toer toet toff tofo toft toof toor toot tore torf toro torr tort tote toto totr tott tre- tree tref treo tret trfr troe troo trot trte trtr tteo tter ttff ttoe tttt

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

effere effete effoff effore efreet efter- eototo eroto- errett etoeot ettore feeror feetof feofor ferfer ferrer ferret ferro- fertee ferter fetter foerre foeto- foetor foofoo footer forrer forrot fortee forter freeof freeto frefre frette froofe fterer fterre oerter oferre offeet oftfor oofotr oooooo ottoor 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 rorter rotter t-tree teeoff teetee teeter terete terreo terrer terret terror terrot terter tertre tetete tetter to-fro toetoe toffee tofore toofer tooter tootoo torero torfer tororo torret tortor totoro totrot totter treeof treete trefet trefor trefot trefte tretee trette troffe trotro trotte

eeeroer errorof feoffee feoffer feoffor feretto ferrere ferrero foo-foo footrot forfere forfete forfree forfret forroot fortore freefor freeter fretter off-off offeree offerer offeror ottetto ottrott reefort refeoff referee referer referto refrete 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

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

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

eforeffort ferretfeet rotorooter toe-to-toe

footforfoot roto-rooter toro-ferrer

teetertotter

teeter-totter tetter-totter