bbbee be-er bebel beber beebe beele belee belep bellb belle belue belur beppe beppu berbe berel berle berre berru beuer beule beure bleep bleer blere blerp bleue bluer blurb blure blurr brebu breel breer brell brere breu- brrrr bruer brule brull bubbe buber buble buell bulb- bull- bulle bulul burel burle burru ebber ebble ebell eberl eblul ebull ebure eeeee eeler eepee elele ellel eller ellul elpee elper elulu eluru epure erbbe erber erere erpel euell euler eurel eurre lebel leber leell leere lelep leleu lelle lepel leper leppe lepre lerer leupp lubbe luber luble lubur lulle lulul luper luppe lupul lurer lurue lurup p-rep pebre peebu peele peell peere peerl pelee peler pelle pepee pepel peple peppe pepup perel perer perle perre perur peule peure plebe pleep plupp prell prelp prepl puber puble puler pull- pulle pullu puple puppe puree purel purer purle purre purul re-up rebbe rebel reber reepe reere relee relue repel reple reppe repub rere- reree reuel reuer reule rubee rubel ruber ruble rubup ruele ruell ruere ruler rupee rupel ruper ruule ubble uber- ullur ulpur ululu uluru upper urelu urubu urupe uuuuu