-tree c-tec ccccc ccett ceere cerc- cerce cerec cerer ceret cerke cerre certe cette crece creek creer creke crete cretu creu- creue cruce cruck cruet cruke crure ctree cttee cucuk cuker curce curer curet curre cutcu cutee cuter ecker eecke eeeee ekker ekuku ekuru erect erere erkec errtu erte erter eruct eruke eteke etete etree etrek etter eturu eucre eurre k-ute kecer keere kekec kerek keret kerre kertu ketek keter kette kreek kreke krete kreuk kucer kucuk kukec kukur kurek kurku kurre kurte kuruc kuruk kutte kuttu kutur recce recet recke rect- recte recue recur recut reece reere rekke rere- reree reret retee reter rette reuer reuet reute rt-rk rucer ruere ruete rukke rurec ruter rutte ruutu tcutk teket tekke terce terek teret tereu terre tert- teter tetr- tette treck treer treet trere trete trett treut truce truck truer truke trute ttttt tucet tucke tuctu tukur turck turek turet turku turre turtu turut tutee tutku tutte tuuru u-cee uceku ukeke ukert urker urkut urter uruce urucu urutu uter- utter uttur uturu uuuuu