-tree e-pro eeeee eepee ef-tu efere efetf effer effet efore efter efuru efutu eofor eorre epopt epote eptfe epure erept erere eroor erore eroto error errtu erte erter erupt etete etoro etour etree etter eturu euro- europ eurre feeor feere fefor feoff feret ferr- ferre ferro ferte feter feto- fetor fette feuer feute foore foote fore- foreo foret forro forte forto forur fotte fotur fouee fouet foupe foure fouro fprot freep freer freet frere frett freur froop froot frore frote froup frute fruto ftrtt fu-fu fuero furo- furor futop futur o-fer oeppo offer offof offre offto ofoto ofour ofpop ofter oo-er ooooo opepe opere opper opter opto- optot optto oreo- orere orero orfeo orfeu orfoe orfor oroer orout orret orter ortet ortoo oruro orutu otere otero ototo otour otpor otter ottur oture ouert ouoro oure- outer outof outre outro outto p-rep peere peert peete pepee peppe pept- pepto pepup perer peret perot perou perre perro perte perto perur peter petr- petre petro petru pette petto petur peure pforp po-po poete pooer poope poopo poore poort poote poper popet popop poppe poppo popup porer poret poro- porro porte porto portu porur potee poter potof potoo potop potor potpe potro potte potto pottu pouer pouff poupe poure preef preff preop prete preto proer profe proff proft proof proor proot prop- prope propp propr propt prore prot- proto prout prtor prute pter- ptere ptero ptpre ptprf ptpro ptprr ptprt ptpru puero puett pupet puppe puppo puree purer puro- purre purte puter putor putre putt- putte putto puttu putuo putup re-up reefe reeft reepe reere refer refet reffe reffo refut repet repop repor repot reppe repro reprt reput rere- reree reret retee reter retop retro rette retto reuer reuet reute ro-ro roero roffe rofor rooer roofe rooft roope roore roote rooue roper roppe rorer roter roto- rotor rotot rotte rotto rouer rouet roufe roure route routt rperf rprop rptor ruere ruete ruffe ruffo rufo- rupee ruper ruter rutte ruutu t-pop t-top teepe teeup tefe tepee tepet tepeu tepor teppo teppu teret tereu teror terre terro tert- teruo teter tetr- tetro tette teuto toeof toerr toeto tofet toffo tofop tofor tofte toore topee toper topet topo- topof topor topot toppo topto topup toreo toret torpe torpo torre torro torte torto tortu torue toter toto- totoe totoo totop totte totup toupe toure touro toute tprot treer treet trefe treff trepp trept trere trete trett treut troee trofe troff troft troop trop- trope tropo trott troue troup trout truer truff trupt truro trute ttttt tuero tuffe tufte tuotu tupee tupou turet turot turre turro turtu turup turut tutee tuteo tutor tutte tutto tuuru u-pop ufere ufofu uouee upeet upfor upoff upper upput upter uptop ureo- urour urter urupe urutu uter- utero utro- utrop utror utter uttur uturu ututo uuuuu