bbbee be-er beber bebic becic beciu becue beebe beeri beibi beice beier beire berbe bercu berec berei berie beriu berre berri berru beuer beure bibbe biber bibic bibie bibri bicer biebe biere bieri birie birur biure brebu brece breer brere breu- bribe brice briec brier brrrr bruce bruer bruiu bruri bubbe buber bucci bucic bucie bucur buici buire burcu buric burie burri burru buruc ccccc cccii cciii cebec ceber ceci- cecie cecri ceere cerbu cerc- cerce cerci cerec cerer ceric cerie cerre ciber cibir cicer ciceu circe ciric cirie cirr- cirri crebe crece creer creu- creue cribb cribe crice crier cruce crure cubbe cubeb cuber cubi- cubic cubie cubub cucei cucui cuire curbi curce curer curic curie curre curri ebber ebbie ebibe ebure eeeee eerie eirie erbbe erber erere ericb erice erier eriic eubie eucre euric eurre ibbur icbrr iceci icici icier icube iecee ieiri ierei iiiee iiiii ircii irece iurie rcirc rebbe rebec reber recce recue recur reece reere reice rere- reree reric rerir reuer reuir ribbi ribce riber ribie ricci ricer riceu ririe riuer rubbi rubee ruber rubie rucci rucer ruere ruiru rurec ruric u-cee uber- ubirr urbic ureic uribe uric- urric urubu uruce urucu ururi uuuuu