bbbee be-er beber beebe beeri beffe befie beibi beier beife beire berbe berei berie berre berri bibbe biber bibie bibri biebe biefe biere bieri bifer biffi birie bixie bre-x breef breer brere bribe brief brier brixx brrrr ebber ebbie ebibe eeeee eerie efere eferi effer effie efrei eirie erbbe erber erere erier eriff erixx exbi- exfbi febre feere feier ferie ferr- ferre ferri ffxii fiber fibex fibr- fibre fieee fieri fifer fifie firee firei firer firie firre fixer fixie freei freer freex freir frere frier frixe ieiri ierei if-- ifere iiiee iiiii rebbe reber reefe reere refer reffe refix reiff rere- reree rerir rexer ri-fi ribbi riber ribie ribxi riefe rifer riife ririe xbiff xbxrx xerif xexex xfire xiber xxiii xxxii xxxix