-tree c-p-c c-tec ccccc ccett ceere cepet cerc- cerce cerec cerer ceret cerre certe cette cpctc crece creep creer crepe crept crepu crete cretu creu- creue creup cruce cruet crupe crure cteep ctree cttee cueup cuper cupr- curce curer curet curre curup cutcu cutee cuter cutup eccup eeeee eepee eperc epure erect erept erere errtu erte erter eruct erupt etete etree etter eturu eucre eurre p-rep pcept pcert pctct peece peere peert peete pepee peppe pept- pepup perce perec perer peret perre perte peruc perur petcu peter petr- petre petru pette petur peuce peure prece prete pruce prute pter- ptere ptprc ptpre ptprr ptprt ptpru puett pupet puppe purce puree purer purre purte puter putre putt- putte puttu putup re-up recce recep recet recpt rect- recte recue recur recut reece reepe reere repec repet reppe reprt reput rere- reree reret retee reter rette reuer reuet reute rucer ruere ruete rupee ruper rurec ruter rutte ruutu teepe teeup tepee tepet tepeu teppu terce teret tereu terre tert- teter tetr- tette treer treet trepp trept trere trete trett treut truce truer trupt trute ttttt tucep tucet tuctu tupee turet turre turtu turup turut tutee tutte tuuru u-cee upc-e upcut upeet upper upput upter urter uruce urucu urupe urutu uter- utter uttur uturu uuuuu