-tree c-tec ccccc ccett ceere ceese cerc- cerce cercs cerec cerer ceres ceret cerfs cerre cerrs cerse cerss certe certs cesce cescr cesse ceste cests cetes cette crece creer crees creft cresc crese cress crest crete crres csere cstcc ctree cttee ecser ectfe eeeee ef-ts efere efetf effer effet effts efter erecs erect erere erest erets erres erses erste ersts erte erter ertes esces escrt esect esere esref esser esses essse estce estee ester estes estet estre etest etete etree etres etter ettes fcsts feces feere feers feese feets ferce feres feret ferr- ferre ferse ferte feser fesse fest- feste fests feter fetes fette frcsc freer frees freet frere frese fress frest frets frett ftest ftrtt recce recet rect- recte rects reece reecs reefe reefs reeft reere reese reest refer refet reffe refts rere- reree reres reret resee reses reset resse reste restr rests retee reter retes rette retts rsssf s-tec scere scert screc scree scter sctrs secre secte sects seece seere seers seese seest seete sefer sefes seffe sefte serce serec seref serer seres seret serfe serff serfs serre serse serss sert- serte serts sesce seser seses sesse seste setec setee seter setse setsf sette setts sssss steer stees steet steff sterc stere sterr sters stert stete stets stree stret strrs teers teese teest teets tefe teffs terce teres teret terre terrs terse tert- tesse teste tests teter tetes tetr- tette treer trees treet trefe treff trefs trere tres- trese tress trest trete trets trett trsce tsere tsets tsrcs ttest ttttt