eeuler efeler effere effete effutu efreet efter- eleele ellett erfurt errett ettutu euller eutere feeler feller felter feltre ferfel ferfer ferlut ferrel ferrer ferret ferrur fertee ferter ferule fetter fettle feture feuter fleete fletre fleure flurre flurte fluter flutte freele frefre frelte fretel frette freure fterer fterre fueler fuerte fuffle fuller furfur furler furlet furrer furrfu furtle futrel futret futter future leeful leelee leerer leetle leffel lefter lefull lerret letter lettre luffer lufful luller lurulu lutter luttre r-tree re-let reefer reeffe reeler reeuel refeel refeet refeff refell refelt refert refete reflee reflet reflue refret refter refuel refurl refute releef reller relleu rereel rerule reteer reteet retell retere retree retret rettel retter rettur returf returu reuele reuere reuler reulle reuter reutte rueful ruelle rufete ruffer ruffet ruffle rufter ruller rurutu ruttee rutter ruttle t-tree teetee teeter telefe telele telete teleut telfer tellee teller tellur terete terrel terrer terret terter tertre teruel tetele tetete tetter teufel teutul treete trefet trefle trefte tretee trette truett trufel trufle trufte truful trulle tuelft tuelle tufele tuffet tuffle tufter turfel turfer turlet turrel turret turtle turtur tururu tutele tuteur tutter tuttle tuttul tuttut tuuelf ufreet ureltu ureter urette uruffe utelle uteute