-tree c-p-c c-tec ccccc ccell ccett cclef ccrcl ccrel cctrl ceele ceere cefcu celer cell- celle celte cepet cerc- cerce cerec cerer ceret cerre certe cette cfler cfu-e clcff cleef cleer cleet clefe cleft clepe clept clerc clere clete clett clue- cluer clufe cluff clupe clurr clute clutt cpcfc cpctc crece creel creep creer creft crele crell crepe crept crepu crete cretu creu- creue creul creup crrel cruce cruel cruet crufe cruft crule crull crupe crure ctcfl cteep ctree ctrlc cttee ctulu cueup cufeu cuffe cufre culet culle cullu culpe culur cupel cuper cuple cupr- cupul curce curel curer curet curle curll curlu curre curup cutcu cutee cuter cutle cutup cuuel eccle eccup ectfe eeeee eeler eepee ef-tu efere efetf effer effet eftel efter efuru efutu elect eleet elele eleut ellel eller ellet ellul elpee elper elrec elulu eluru elute eperc eptfe epure erect erept erere erpel errtu erte ertel erter eruct erupt etete etree ettel etter ettle eturu eucre euell euler eurel eurre fclef feele feere felce felet felle felte feltt felup ferce ferel feret ferle ferr- ferre ferte fetel feter fette feuer feule feute flect fleer fleet flere flert flete flett fleur fluce fluff flure flurr flurt flute frcpc freel freep freer freet frere frett freur fruct frute ftlee ftrtt fu-fu fulle fullf fulup furel futur lecce leece leell leere leert lefeu leffe leful lelep leleu lelle lepel leper lepet leppe lepre lept- lerer letre lette letup letur leuc- leuce leupp lucee lucet lucre lucur lufre lufte lulec lulle lulte luluc lulul luper luppe lupul lurer lurue lurup lute- luter lutte p-rep pcell pcept pcert pctct pecel pecul peece peele peell peere peerl peert peete pelee peler pelet pelle pepee pepel peple peppe pept- pepup perce perec perel perer peret perle perre perte peruc perur petcu peter petr- petre petru pette petur peuce peule peure pfuel pleep pleet plete pleut pluff plupp plut- plute prece preef preff prell prelp prepl prete pruce prute pter- ptere ptprc ptpre ptprf ptprr ptprt ptpru pucel puett pulce puler pull- pulle pullu pulut pupet puple puppe purce puree purel purer purle purre purte purul puter putre putt- putte puttu putup re-up recce recep recet recpt rect- recte recue recur recut reece reefe reeft reepe reere refel refer refet reffe refut relee relet relte relue repec repel repet reple reppe reprt reput rere- reree reret retee retel reter rette reuel reuer reuet reule reute rperf rucer rucul ruele ruell ruere ruete ruffe ruler rupee rupel ruper rurec ruter rutle rutte rutul ruule ruutu tcell tecul teele teell teepe teeup tefe telce tele- telec telep teler teleu tell- telle tepee tepet tepeu teppu terce teret tereu terre tert- tetel teter tetle tetr- tette tlell tlett tpler treer treet trefe treff trele trepp trept trere trete trett treut truce truel truer truff trule trull trupt trute ttttt tucep tucet tuctu tuelf tuell tuelt tuffe tufte tulce tulet tulle tupee tuple turel turet turle turre turtu turul turup turut tutee tutel tutle tutte tuuru u-cee uccel uccle ucell uclue uelfe ufere ulcer ullet ullur ulpur ultre ululu uluru upc-e upcut upeet upper upput upter urcel urelu urtel urter urtlu uruce urucu urupe urutu uter- utter uttur uturu uuuuu