-tree c-met c-tec ccccc ccett cecum ceere cemec cemre cerc- cerce cerec cerer ceret cerre certe cetme cette cmere crece creem creer creme crete cretu creu- creue cruce cruet crume crure ctcum ctree cttee cumec cumm- curce curer curet curre cutcu cutee cuter ecume eeeee eemct emcee emeer emere emert emmer emmet emtec emtee emure erect erem- erere errtu erte erter eruct etete etree etter eturu eucre eum-u eurre mccue mcree mecum meece meemu meere meete memer merce merer meret merre merte merur meter metr- metre mette metur meuer meure meute mmccc mmmcc mmmmm mreru mrmet mt-tc mt-te mt-tm mt-tr mt-tt mtree mtume muctc mucum mucur mumcu mumme mummu muret mureu murre murru murum murut muter mutet mutum recce recet rect- recte recue recur recut reece reeme reere remee remer remet remue rere- reree reret rerum retee retem reter rette reuer reuet reume reute rmutt rucer ruere ruete rumer rummu rurec ruter rutte ruutu tecum teeme teemu terce terem teret tereu terme terre tert- teter tetr- tette treer treet treme trere trete trett treut truce truer trume trute ttttt tucet tuctu tucum tumut turem turet turre turtu turut tutee tutte tuuru u-cee umeer umeme ureme urter uruce urucu urutu uter- utmer utrum utter uttur uturu uuuuu