bbbb bbdd bbdo bbrg bd-r bdii bdog bfgf bibb bibi bibo bidi bido bidr biff bifi bigb bigd bigg bigo bio- biog bioi birb bird birg biri biro birr bobb bobi bobo bodb bodi bodo bofd boff bogd bogg bogi bogo boi- boid boii boob bood boof boog boor bor- bord borf borg bori boro borr brdo brid brig brio brob brod brog broo bror brrr d-bo dbfo dddd dfrf dfri dibb dibo didi dido dif- diff digg digi digo diii dior dird dirr dobb dobi dod- dodd dodg dodi dodo doff dog- dogg dogi dogo doid doig doob dood doof door dord dorf dori doro dorr drib drif drob drod drof drog ffff ffii ffrr fidf fido fiff fifi fifo figg figo fiii fior fofo fogg fogi fogo foid food foof for- forb ford forg fori foro forr frib frid frig frio frob frog gbbo gddb gdfr gdor gfor ggfg gggg gibb gidd gidi gido giff gigg gigi gigo giog gioi gird girg giri giro girr gobi gobo godi godo goff gofr gogi gogo goif good goof goog gooi goor gorb gord gorf gorg gori goro gorr grbr grib grid grif grig grob grod grof grog groi groo gror grrr i-go ibdo ibfi ibid ibrd ibri ibro iddo idgf idgo idid idig idio idir idog idrf idro ifbb ifid ifor ifrb ifrf ifri igbo igoo igor igri iiii iiio iioi iioo iobi iod- iodd iodo ioii ioio ioof iooi iooo iorg iori irdo iri- irid irig irio irob irod irri obbo obid oboi obor obri obro odbo oddd oddi odio odir odoo odor ofdr off- offo offr ofgo ofid ofor ogb ogfr oggi ogod ogog ogoi ogri ogro oido oigo oiii oobi oodi ooff ooid oooo oord orbb orbi orbo ordo orff orfi orgo ori- orid orif orig orio oro- orof oror orri orro rbbb rbbr rdio rfdi rfid rgbi rib- ribo ridd ridi rido riff rigg rigi rigo riif riri rob- robb robi robo rodd rodi rodo roff rofo rogg rogi rogo roid roif roig roio roir roob rood roof roog rooi roor rori roro rrif rrrr