b-reel b-tree bbbbbb beblur beebee beeler beeter beetle belber belett beller bellet belleu bellue beltel belter beltre belull belute berbee berber bereel bereet berere berrer berret bertel bertre berube betell betelu betere betete betrue bettee bettel better bettle betutu beurre bleere blublu bluett blurre bluter brebel breere brette breuer brubru bruel brulee bruree brutel bubber bubble bubele bububu bueler buellt bulbel bulbul bull-e bullee buller bullet bultel bulter burbet burble burbur burell burler burlet burree burrel burrer burret burutu butere butler buttel butter buttle ebbert eberle eburru eebree eeuler elbert eleele ellett erbree errett ettutu eubule euller eutere lebert lebret leelee leerer leetle lerret letter lettre lubber luller lurulu lutter luttre r-tree re-let rebble rebell rebtel rebulb rebute reeler reeuel reller relleu rereel rerule reteer reteet retell retere retree retret rettel retter rettur retube returu reuele reuere reuler reulle reuter reutte rubbee rubbel rubber rubble rubell rubutu ruelle ruller rurutu ruttee rutter ruttle rutube t-tree t-tube teebee teetee teeter telele telete teleut tellee teller tellur terete terrel terrer terret terter tertre teruel tetele tetete tetter teutul trbble trebel treble trebur treete tretee trette truble truett trulle tubber tubble tubul- tubule tuelle turbel turbet turble turlet turrel turret turtle turtur tururu tutele tuteur tutter tuttle tuttul tuttut u-tube ureltu ureter urette utelle uteute