-er eee eeo eer eet eex eo- eoe eoo eor eot eou ere ero err ert eru ete eto etr ett etu etx eu- eue eur eut eux ex- exe exo exr ext exu exx oee oeo oer oet oex oo- ooo oor oot oox or- ore oro orr ort oru orx ot- ote oto otr ott otu ou- oue ouo our out ox- oxo oxt oxx re- ree reo rer ret reu rex roe roo ror rot rou rox rrr rrt rru rte rto rtr rtt rtu rtx rue ruo rur rut ruu rux rxr t-x te- tee teo ter tet teu tex to- toe too tor tot tou tox tre tro trr trt tru trx tte tto ttr ttt ttu ttx tue tuo tur tut tuu tux txe txt txu uee uer uet uoe uoo uor uot uox ur- ure uro urr urt uru urx ute uto utr utt utu utx uue uur uut uuu uxo uxr uxt uxu xee xer xet xeu xex xoo xor xot xox xrt xrx xtr xtx xue xxo xxx

eeee eero eete eetu eext eore eoto eoux er-x erer eret eroe eroo erre erro ertu erur etee eter etoe etox etre etro ette etto ettu etux euer eur- eure euro eurt exer exo- exor exrx exte extr o-eo oere ooer oooo oore oort ore- oreo orer orex oro- oroe oror orot orro orte orto otee oter oto- otoe otoo otor otre otro otte otto ottu otur ouer our- oure ouro ourt out- oute outo ouu- oxer oxo- oxox oxxo reet reot reou rere rero rert reru rete reto retr rett reue reut reuu reux rexx roer roet roor root roox rore roro rort roru rote roto rotr rott roue rout roux roxo rrrr rtee rtex ruer ruet rure ruro ruru rute ruto rutt rutu teer teet teor ter- tere tero terr teru tete teto tetr tett tetu tetx teut text toee toer toet toor toot tore toro torr tort toru torx tote toto totr tott tour tout tox- toxo toxt tre- tree treo tret treu trex troe troo trot trou trox trte trtr true trut truu trux tteo tter ttoe tttt tuer tuet tuor ture turo turr turt turu tute tuto tutt tutu tuuo txtr uext uor- uore ure- uret urex uro- uroo urox urre urte urur urut uter utor utto uttu uuuu uxor uxue xeer xer- xero xert xexe xoro xote xout xoxo xtro xuxu xxxo xxxx

-tree eeeee eorre erere eroor erore eroto error errtu erte erter etete etext etoro etour etree etter eturu eurex euro- eurre exert exore exort exout exter extre extro extue exute oo-er ooooo oreo- orere orero orexo oroer orout oroux orret orter ortet ortoo oruro orutu otere otero ototo otour otter ottur oture ouert ouoro oure- outer outre outro outto oxter reere reorx rere- reree reret retee reter retex retox retro rette retto reuer reuet reute rexer ro-ro roero roeux rooer roore roote rooue rorer roter roto- rotor rotot rotox rotte rotto rouer rouet roure route routt rtext ruere ruete ruter rutte ruutu t-rex teret tereu terex teror terre terro tert- teruo teter tetex tetr- tetro tette teuto texor texte toerr toeto toore toreo toret torre torro torte torto tortu torue torxe toter totex toto- totoe totoo totte toure touro toute toxo- treer treet trere trete trett treut treux troee trott troue trout truer truex truro trute truxe ttttt tuero tuotu turet turot turre turro turtu turut tutee tuteo tutor tutte tutto tuuru uouee ureo- urour urter urutu uter- utero utro- utror utter uttur uturu ututo uuuuu x-out xero- xerox xerte xetex xexeu xexex xootr xorro xotox xoxox xtext xtort xtree

e-text eototo eroto- errett errour etoeot etreux ettore ettutu euroto eururo eutere exeter exorte extort extro- oerter oooooo orrour ottoor ouerre ouroux outour outter outtro oxeote r-tree reroot reteer reteet reteoo retere retore retort retour retree retret retro- retrot retter rettur returu reuere reuour reuter reutte rooter rootte rorter rotour rotout rotrou rotter roture router routot rurutu rutour ruttee rutter t-tree teetee teeter terete terreo terrer terret terrex terror terrot terrou terter tertre tetete tetter texter textor toeout toetoe tooter tootoo torero tororo torret torrox tortor tortou tortue totoro totrot totter tourer touret tourou tourte touter toutou toutuo treete tretee trette trotro trotte trueto truett trutex tuotuo turret turtur tururu tuteur tutour tutter tuttut ure-ox ureter urette urouer uroure urtext utero- uteute utroor x-tree xerert xooter xoxoxo

e-tutor eeeroer exterro orrouer ottetto ottrott ourouer outroot reexert reroute reteere reterre retrete rettert rettore reutter rextout rootout rootrot roturer routeto roxette terere tereto- terreer terrere terrour tettete textour texture toe-out toe-toe too-too tootrue toreout torrert tortour torture tototoo treetee tretour trettre tro-tro trotout trottee trotter trouter tut-tut tutorer urretxu utterer ututo-e xeroxer xxxxxxx

eurotort exorture extorter extortor re-route rerouter retorter teetoter terutero teruteru toetotoe toottoot tore-out torotoro tortuero torturee torturer totterer tourette tourtour treeroot trotteur turretot turturro uretero- utterrot xoxoxoxo

euroroute exerttrex retexture retrotort rotrooter terretour teru-tero tortoreto tourrette tuotuorou tuttototo

outerroute rotorooter toe-to-toe tutortrout

roto-rooter tootertutor

teetertotter xxxxxxxxxxxx

teeter-totter tetter-totter