bbbee be-er be-ro beber bebog beebe beez begee begge begob begor begue begur beour berbe bereg berge berob beroe beror berre berru berze berzo beuer beure bezer bo-bo bobr bobre boege boero boeur boger bogge bogoe bogor bogu bogue bogur booer boore booru booze borbo boree borer borge borgo borgu boro- boroo borou borre borro borzu bouee bouer bouge boure bourg bouze bozer bozoo brebu breer breg- brege bregg breo- brere breu- breze brobo broer broue broze brrrr bruer bruge brugg bruzz brzeg bubbe buber buger bugge bugoo bugre burge burgo burgu buroo buroz burro burru buzzr ebber eberg eboue ebure eeeee egger eorre erbbe erber erege erere ergo- eroge eroor erore error erugo eubro euro- eurre ezbob gberg gberu geber gebre gebur gebze geebo geere geeze gegge georg gerbe gerbo gerre gerze gezer go-go go-oo gobbe gobbo gobeo goerz goeze gogro gogue goobo googe goore gorbe goree gorer gorge gorgo gorre gorze gouge goure gozzo grebe grebo greer grege gregg grego grgur groge grogg groue groze grrrr grubb grube grure gruze gubbe gubbo guber gubru guere guero gueze guoge gurge guroo gurre gurro gurur guzzo o-r-b obegu oberg oboro oboue obreb obrez obzor ogogo ogugu oo-er ooooo oreo- orere orero orgue orguz orobe orobo oroer orrgo orube oruro ouoro oure- ozero ozgur ozoro rebbe rebeg reber reege reere reeze reger regge reggo regur reorg rere- reree rerez rerob reuer reuze rezzo ro-ro robbe robbo rober robo- robor robur roero roger rogge rogoz rogue rooer rooge roore rooue rorbu rorer rouer rouez rouge roure rouze rubee ruber rubor ruegg ruere ruger rugge uber- ubobo ubrez ugro- ugrug uouee ureo- urger uroob urour urroz urubu uuuuu uzbeg uzere zberg zboze zbure zebre zebub zeebo zeero zegge zerbe zerbo zereg zerog zeror zerre zober zogbo zorbo zorge zorgo zorro zu-zu zuber zurge zzzzz