-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