bbbee bcell be-er bebel beber becel becue beebe beele beffe befur belce belec belee belef bellb belle belue belur berbe bercu berec berel berle berre berru beuer beule beure bleer blere bleue bluer bluff blufr blurb blure blurr brebu brece breef breel breer brell brere breu- brrrr bruce bruer bruff brule brull bubbe buber buble bucur buell buffe bufle bulb- bull- bulle bulul burcu burel burle burru buruc cbeff cblue ccccc ccell cclef ccrcl ccrel cebec ceber ceele ceere cefcu celeb celer cell- celle cerbu cerc- cerce cerec cerer cerre cfler cfu-e clcff cleef cleer clefe clerc clere clubb clue- cluer clufe cluff clurr crebe crece creel creer crele crell creu- creue creul crrel cruce cruel crufe crule crull crure cubbe cubeb cubel cuber cubub cufeu cuffe cufre culbe culle cullu culur curce curel curer curle curll curlu curre cuuel ebber ebble ebell eberl eblul ebull ebure eccle eeeee eeler efere effer efuru elele ellel eller ellul elrec elulu eluru erbbe erber erere eucre euell euler eurel eurre fclef febel feble febre feele feere felce felle ferce ferel ferle ferr- ferre feuer feule fleer flere fleur fluce fluff flurb flure flurr freel freer frere freur fu-fu fulbe fulle fullf furel lebce lebec lebel leber lecce leece leell leere lefeu leffe leful leleu lelle lerer leuc- leuce lubbe luber luble lubur lucee lucre lucur lufre lulec lulle luluc lulul lurer lurue rebbe rebec rebel reber recce recue recur reece reefe reere refel refer reffe relee relue rere- reree reuel reuer reule rubee rubel ruber ruble rucer rucul ruele ruell ruere ruffe ruler rurec ruule u-cee ubble uber- uccel uccle ucell uclue uelfe ufere ulcer ullur ululu uluru urcel urelu urubu uruce urucu uuuuu