bbbee be-er beber becue beebe beez berbe bercu berec berre berru berze beuer beure bezer brebu brece breer brere breu- breze brrrr bruce bruer bruzz bubbe buber bucur bucze burcu burru buruc buzzr ccccc cebec ceber ceere cerbu cerc- cerce cerec cerer cerre crebe crece creer creu- creue cruce crure cruze cubbe cubeb cuber cubub curce curer curre ebber ebure eeeee erbbe erber erere eucre eurre rebbe rebec reber recce recue recur reece reere reeze rere- reree rerez reuer reuze rubee ruber rucer ruere rurec u-cee uber- ubrez urubu uruce urucu uuuuu uzere z-urc zbucz zbure zebec zebre zebub zerbe zerre zu-zu zuber zucer zucre zzzzz