b-reel b-tree bbbbbb beblur beebee beeker beeler beeter beetle bekele bekker belbek belber belett belker beller bellet belleu bellue beltek beltel belter beltre belull belute berbee berber bereel bereet bereke berere berkel berker berkut berrer berret bertel bertre berube betell betelu betere betete betrue bettee bettel better bettle betutu beurre bleere bleket blublu bluett blurre bluter brebel breere brekke brette breuer brubru bruel bruker bruket brulee bruree brutel bubber bubble bubele bububu bueler buellt bukett bukkur bukler bukuru bulbel bulbul bulker bull-e bullee buller bullet bultel bulter burbet burble burbur burell burket burkut burler burlet burree burrel burrer burret burtle buruku burutu butere butler buttel butter buttle ebbert eberle eburru eebree eeuler ekuele elbert eleele elekte ellett erbree erketu errett ettutu eubule euller eutere k-tree kebber kebele keeble keeker keekle keeler keelut kekkut kekule kelbke kelebe kelkel kellee keller kelter kerbel kerber kereru kerker kerkuk kertee ketler ketter kettle ketuke keuruu kleber kleeer kleket klub-u krekel kreker kretek kubeer kubler kukere kullur kulter kultuk kultur kululu kurell kurkul kurree kururu kutke kutter kuttle kuuele lebbek lebert lebret leelee leerer leetle lekker lerret letter lettre lubber lukulu luller lurker lurulu lutter luttre r-tree re-let rebble rebell rebtel rebuke rebulb rebute reeker reeler reeuel rekrut releke reller relleu rereel rerule reteer reteet retell retere retree retret rettel retter rettur retube returu reubke reuele reuere reuler reulle reuter reutte rubbee rubbel rubber rubble rubell rubutu ruelle rukkle rukutu ruller rurkee rurutu ruttee rutter ruttle rutube t-tree t-tube teebee teetee teeter tekrur telele telete teleut tellee teller tellur terete terkel terrel terrer terret terter tertre teruel tetele tetete tetter teutul trbble trebek trebel treble trebur treete treker tretee trette tretuk truble truett truker trulle tubber tubble tubul- tubule tuelle tuktuk turbel turbet turble turkel turker turkle turlet turrel turret turtle turtuk turtur tururu tutele tuteur tutter tuttle tuttul tuttut u-tube ureltu ureter urette urkulu utelle uteute utukku utukur