-tree c-tec ccccc ccett ceere cerc- cerce cerec cerer ceret cerre certe cette crece creer crete cretu creu- creue creux cruce cruet cruex crure ctree cttee curce curer curet curre cutcu cutee cuter cutex eeeee erect erere errtu erte erter eruct etete etext etree etter eturu eucre eurex eurre excur exect execx exert exter extre extue exute recce recet rect- recte recue recur recut reece reere rere- reree reret retee reter retex rette reuer reuet reute rexer rtext rucer ruere ruete rurec ruter rutte ruutu t-rex terce teret tereu terex terre tert- teter tetex tetr- tette texte treer treet trere trete trett treut treux truce truer truex trute truxe ttttt tucet tuctu turet turre turtu turut tutee tutte tuuru u-cee urter uruce urucu urutu uter- utter uttur uturu uuuuu xerte xetec xetex xexeu xexex xtext xtree