b-reel bbbbbb beblur becure becurl beebee beefer beeler befell beflee befree belber beller belleu bellue belull berbee berber bercel bereel berere berrer berube beurre bleere blublu blurre brebel breefe breere breuer brubru bruel brulee bruree bubber bubble bubele bububu bueler buffel buffer buffle bulbel bulbul bull-e bullee buller burble burbur burcer burell burfee burler burree burrel burrer c-clef c-cube cebell cecele ceecee ceeler celler cellu- celure cercle cerler ceruce cerule cleber cleefe cleere clerre cleure clucer crelle cruell cubbel cubber cubube cucube cucurb cuffee cuffer cuffle culler curber curble curfur curler currer curule eberle ebrulf eburru eculee eebree eeuler efeler effere elbeuf eleele erbree eubule euller feeble feeler felber feller ferber ferfel ferfer ferrel ferrer ferrur ferule fleble fleece fleure fluber flurre freele frefre freure fubble fueler fuffle fulcre fuller furber furfur furler furrer furrfu leccer lecerf leeful leelee leerer leffel lefull lubber lubefu lucule luffer lufful luller lurulu rebbec rebble rebell rebeuc rebuff rebulb reclue recrue recuer recule recull recurb recure reefer reeffe reeler reeuel refeel refeff refell reflee reflue refuce refuel refurb refurl relece releef reller relleu reluce rereel rerule reuele reuere reuler reulle rubbee rubbel rubber rubble rubell rueful ruelle ruffec ruffer ruffle ruller ullucu uruffe