bbbee be-er bebel beber beebe beele belee belem bellb belle belue belum belur bembe bemer berbe berel berle berme berre berru berum beuer beule beure bleer blere bleue bluer blume blurb blure blurr brebu breel breem breer brell breme bremm brere breu- brmmm brrrr bruer brule brull brume brumm bubbe buber buble buell bulb- bull- bulle bulul bumbu bumme burel burle burru ebber ebble ebell eberl eblul ebull ebure eeeee eeler elele eleme ellel eller ellul elmer elulu eluru embee embel ember emble embue emeer emele emell emere emerl emmer emule emure erbbe erber erem- erere euell euler eum-u eumel eurel eurre lebel leber leell leeme leere leleu lelle lemel lemer lemme lemur lerer lerum lmule lubbe luber luble lubur lulle lulul lumb- lumbe lumer lumle lumme lurer lurue mbebe mbere mbube mbule mbulu mburu mebbe meble meele meell meemu meere melbu melee melem mell- melle melub melur membe memel memer merel merer merle merre merul merur meuer meule meure mmmmm mreru mrlee muble muler mulle mulur mumbe mumle mumlu mumme mummu mureu murle murre murru murum rebbe rebel reber reeme reere relee relue remee remel remer remue rere- reree rerum reuel reuer reule reume rubee rubel ruber ruble ruele ruell ruere ruler rumbe rumer rummu ruule ubble uber- ubume ullur ulmer ulrum ululu uluru umbe- umbel umber umble umblu umbre umeer umeme urelu ureme urubu uuuuu