bbbee be-er beber beebe beeri beffe befie befur beibi beier beife beire berbe berei berie beriu berre berri berru beuer beure bibbe biber bibie bibri biebe biefe biere bieri bifer biffi birie birur biure brebu breef breer brere breu- bribe brief brier brifu brrrr bruer bruff bruiu bruri bubbe buber buffe buffi buire burfi burie burri burru ebber ebbie ebibe ebure eeeee eerie efere eferi effer effie efrei efuru eirie erbbe erber erere erier eriff eubie eurre febre feere feier ferie ferr- ferre ferri feuer fiber fibr- fibre fieee fieri fifer fifie firee firei firer firie firre freei freer freir frere freur frier fu-fu furie furir ibbur ieiri ierei if-- ifere iiiee iiiii iurie rebbe reber reefe reere refer reffe reiff rere- reree rerir reuer reuir ri-fi ribbi riber ribie riefe rifer riife ririe riuer rubbi rubee ruber rubie ruere ruffe rufi- rufie ruiru uber- ubirr ufere uffie uribe urubu ururi uuuuu