-tree c-cor c-p-c c-pop c-tec ccccc ccett ceco- ceere ceoce ceoor cepet cepot ceppo cerc- cerce cerco cerec cerer ceret cero- ceroc cerou cerre cerro certe ceto- cette co-co co-op cocc- cocce cocco coceo cocto cocur coepe coete coeur cooee cooer coope coopt coore coote copce copec coper coppe coppo copr- copre copro copte copto copur coput corce core- coree corer coreu coro- corop corot corpe corre corte corto coter cott- cotte cotto cottu couco couer coupe coure court couru couto coutu cpctc crece creep creer creo- creop creot crepe crept crepu crete cretu creu- creue creup croce croco crooe croop croot cropc crope cropo crore crote crott croup crout cruce cruet cruor crupe crure cteep ctree cttee cuero cueto cueup cuoco cuore cuper cupr- cupro curce curer curet curre curro curto curup cutco cutcu cutee cuter cutro cutto cutup e-pro eccup ecorp ecto- ector ectot eeeee eepee eorre epcot eperc epopt epote epure erect erept erere eroor erore eroto error errtu erte erter eruct erupt etete etoro etour etree etter eturu eucre euro- europ eurre occur ocoee ocote ocree octet octo- octor oeco- oeppo oo-er oocre ooooo opepe opere opper opter opto- optot optto orcet orcop oreco oreo- orere orero oroco oroer orout orret orter ortet ortoo oruce oruro orutu otere otero otoce ototo otour otpor otter ottur oture ouert ouoro ource oure- outer outre outro outto p-rep pcept pcert pctct pecco peece peere peert peete pepco pepee peppe pept- pepto pepup perce perec perer peret perot perou perre perro perte perto peruc perur petco petcu peter petr- petre petro petru pette petto petur peuce peure po-po pocop poete pooer poope poopo poore poort poote popco poper popet popop poppe poppo popup porco porcu porec porer poret poro- porro porte porto portu porur potco potec potee poter potoc potoo potop potor potpe potro potte potto pottu pouce pouer poupe poure prece preco preop prete preto proer proor proot prop- prope propp propr propt prore prot- proto prout prtor pruce prute pter- ptere ptero ptprc ptpre ptpro ptprr ptprt ptpru puero puett pupet puppe puppo purce puree purer puro- purre purte putco puter putor putre putt- putte putto puttu putuo putup r-co- re-up recce recco recep recet recpt rect- recte recto recue recur recut reece reepe reere repco repec repet repop repor repot reppe repro reprt reput rere- reree reret retee reter retop retro rette retto reuer reuet reute ro-ro rocco rocor rocou roero rooer roope roore roote rooue roper roppe rorer roter roto- rotor rotot rotte rotto rouer rouet roure route routt rprop rptor rucer ruere ruete rupee ruper rurec ruter rutte ruutu t-pop t-top tecou teepe teeup teoco tepco tepee tepet tepeu tepor teppo teppu terce terco teret tereu teror terre terro tert- teruo teter tetr- tetro tette teuto tocco toco- tocut toece toerr toeto toore topcu topee toper topet topo- topor topot toppo topto topup torce toreo toret torpe torpo torre torro torte torto tortu torue toter toto- totoe totoo totop totte totup toupe toure touro toute tprot treco treer treet trepp trept trere trete trett treut troco troee troop trop- trope tropo trott troue troup trout truce truco truer trupt truro trute ttttt tucep tucet tuctu tuero tuotu tupee tupou turco turet turoc turot turre turro turtu turup turut tutee tuteo tutor tutte tutto tuuru u-cee u-pop ucero uouee upc-e upcot upcut upeet upper upput upter uptop ureo- urour urter uruce urucu urupe urutu uter- utero utro- utrop utror utter uttur uturu ututo uuuuu