bbbee be-er beber becue beebe beez begee begge begue begur berbe bercu berec bereg berge berre berru berze beuer beure bezer brebu brece breer breg- brege bregg brere breu- breze brrrr bruce bruer bruge brugg bruzz brzeg bubbe buber bucur bucze buger bugge bugre burcu burge burgu burru buruc buzzr ccccc cebec ceber ceere cegge cerbu cerc- cerce cerec cerer cerge cerre crebe crece creer cregg creu- creue cruce crure cruze cubbe cubeb cuber cubub curce curer curre curug ebber eberg ebure eeeee egger erbbe erber erceg erege erere eucre eurre gberg gberu geber gebre gebur gebze geere geeze gegge gerbe gerce gerre gerze gezer grebe grece grecu greer grege gregg grgur grrrr grubb grube grure gruze gubbe guber gubru guce gucer guere gueze gurcz gurge gurre gurur rebbe rebec rebeg reber recce recue recur reece reege reere reeze regec reger regge regur rere- reree rerez reuer reuze rubee ruber rucer ruegg ruere ruger rugge rurec u-cee uber- ubrez ugrug urger urubu uruce urucu uuuuu uzbeg uzere z-urc zberg zbucz zbure zebec zebre zebub zegge zerbe zereg zerre zu-zu zuber zucer zucre zurge zzzzz