-tree eeeee ef-ts efere efetf effer effet effts efter erere erest erets erres erses erste ersts erte erter ertes esere esref esser esses essse estee ester estes estet estre etest etete etree etres etter ettes feere feers feese feets feres feret ferr- ferre ferse ferte feser fesse fest- feste fests feter fetes fette freer frees freet frere frese fress frest frets frett ftest ftrtt 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 seere seers seese seest seete sefer sefes seffe sefte seref serer seres seret serfe serff serfs serre serse serss sert- serte serts seser seses sesse seste setee seter setse setsf sette setts sssss steer stees steet steff stere sterr sters stert stete stets stree stret strrs teers teese teest teets tefe teffs 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 tsere tsets ttest ttttt