bbbee be-er be-ro beber beebe beeri beffe befie befoe befor beibi beier beife beire beofe beoff beoir berbe berei berie berio berob beroe beror berre berri bibbe bibbo biber bibie bibio bibri biebe biefe biere bieri bifer biffi biffo bifor biore birie bo-bo bobbi bobr bobre bobri boero boffi boffo boibe boier boire boiro booer boore borbo boree borer borio boro- boroo borre borro breef breer breo- brere bribe brief brier brobo broer brrrr ebber ebbie ebibe ebrio eeeee eerie efere eferi effer effie effio efore efrei eieio eirie eofor eorre erbbe erber erere erier eriff erio- eroor erore error febio febre feeor feere fefor feier feoff ferie ferio ferr- ferre ferri ferro fiber fibr- fibre fibro fieee fieri fiero fifer fifie fiore fiori firee firei firer firie firre foir- foire foore fore- foreo forio forro freei freer freir frere frier frobe frore i-beo ibeof ibero ibibo ibore ieiri ierei ieroe if-- ifere iiiee iiiii ioffe ioooi ioooo iorio irobo irori o-fer o-r-b obeie oboro obreb oeiro offer offie offir offof offre ofori oo-er ooioo ooooo oorie orebi oreo- oreoi orere orero orfei orfeo orfoe orfor oribe oribi orobe orobo oroer rebbe reber reefe reere refer reffe reffo reiff rere- reree rerir rerob ri-fi ribbi riber ribie ribo- riefe rifer riife ririe ro-ro robbe robbi robbo rober robie robo- robor roero roffe rofor rooer roofe roore rorer