bbbb bbrg bfgf bibb bibi bibo biff bifi bigb bigg bigo bio- biog bioi birb birg biri biro birr bobb bobi bobo boff bogg bogi bogo boi- boii boob boof boog boor bor- borf borg bori boro borr brig brio brob brog broo bror brrr ffff ffii ffrr fiff fifi fifo figg figo fiii fior fofo fogg fogi fogo foof for- forb forg fori foro forr frib frig frio frob frog gbbo gfor ggfg gggg gibb giff gigg gigi gigo giog gioi girg giri giro girr gobi gobo goff gofr gogi gogo goif goof goog gooi goor gorb gorf gorg gori goro gorr grbr grib grif grig grob grof grog groi groo gror grrr i-go ibfi ibri ibro ifbb ifor ifrb ifrf ifri igbo igoo igor igri iiii iiio iioi iioo iobi ioii ioio ioof iooi iooo iorg iori iri- irig irio irob irri obbo oboi obor obri obro off- offo offr ofgo ofor ogb ogfr oggi ogog ogoi ogri ogro oigo oiii oobi ooff oooo orbb orbi orbo orff orfi orgo ori- orif orig orio oro- orof oror orri orro rbbb rbbr rgbi rib- ribo riff rigg rigi rigo riif riri rob- robb robi robo roff rofo rogg rogi rogo roif roig roio roir roob roof roog rooi roor rori roro rrif rrrr