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-tree eeeee eepee ef-ts ef-tu efere efetf effer effet effts efter efuru efuse efutu epees epeus eppes eptfe epure erept erere erest erets erres errtu erses erste ersts erte erter ertes erupt eruts esere esp-r esper espre esref esser esses essse essue estee estep ester estes estet estre estur estus esure etest etete etree etres etter ettes eturu eurre eurus euser feere feers feese feets feres feret ferr- ferre ferse ferte ferus