-tree c-p-c c-tec ccccc ccett ccnet ceene ceere cence cenpf cenpn cenpt cent- centr cepet cerc- cerce cerec ceren cerer ceret cerne cerre certe ceten cette cnnfn cnnnn cntrc cpcfc cpctc crece creen creep creer creft cren- crepe crept crete crnce crnec crner cteep cten- ctene ctree cttee e-ten eccen ectfe eeeee eence eener eenet eepee eeten efere efetf effer effet efnet efren eften efter encre enent enete enfce enfer ennet enper enten enter entre epeen epene eperc eptfe erect ereen erept erere ernen ernet erte erter etern etete etnre etree etten etter fcent feere fence fener fenne ferce feren feret ferr- ferre ferte feter fette frcpc freep freer freet frere frett ftrtt n-p-n ncftp ncree necr- nect- neece neere nefen nefer neffe nefre nefte nente neper neppe nepte neree neret nerre nerte neten netne netpc nette nnfcc ntete p-n-p p-rep pcept pcert pctct peece peene peent peere peert peete pence pene- pener penne penre pent- pente pepee peppe pept- perce perec peren perer peret perne pernt perre perte peter petr- petre pette pnetc pptnt prece preef preen preff prene prent prepn prete prntr pter- ptere ptprc ptpre ptprf ptprn ptprr ptprt recce recen recep recet recpt rect- recte reece reefe reeft reene reepe reere refen refer refet reffe refne rence renee rener renet renfe renne rente repec repen repet reppe reprt rere- reree reret retee reter retnr rette rnpep rperf rtenn tecn- teepe tefe tefen tencc tence tenen tener tenet tenne tenpn tente tepee tepet terce teret terne terre tert- teten teter tetr- tette tnftp tntnt treen treer treet trefe treff trenc trene trent trepp trept trere trete trett ttnet ttttt