bbbee be-er beber beebe beeri begee begge begue begur beibi beier beige beire berbe bereg berei berge bergi berie berig beriu berre berri berru beuer beure bibbe biber bibie bibri biebe biere bieri big-i bigge bigig birgi birgu birie birur biure brebu breer breg- brege bregg brere breu- bribe brieg brier brige brigg brigi brrrr bruer bruge brugg bruiu bruri bubbe buber buger bugge bugre buire burge burgi burgu burie burri burru ebber ebbie eberg ebibe ebure eeeee eerie egger eggie eggig eiger eirie erbbe erber erege erere erier eubie eurre gberg gberu geber gebre gebur geere gegge geier geige geire geiue gerbe gerbi gerre gerri gibbe gibbi giber gibi- giger gigge gigue girei girru grebe greer grege gregg greig grgur grieg grier grigg grrrr grubb grube gruiu grure gubbe gubbi gubei guber gubru guere guggi gugir guige guire guiri gurge gurgi gurre gurur ibbur iberg ieiri ierei iggri igigi iiiee iiiii iregi irreg iurie rebbe rebeg reber reege reere reger regge regie regii regur reigi rere- reree rerig rerir reuer reuir ribbi riber ribie rig-i ririe riuer rubbi rubee ruber rubie ruegg ruere ruger rugge rugii rugir ruiru uber- ubirr uggie ugrug uigur urger uribe urubu ururi uuuuu