bbbb bboy bbrg bbyo bibb bibi bibo bigb bigg bigo bio- biog bioi birb birg biri biro birr biry bivi bivy bobb bobi bobo boby bogg bogi bogo bogy boi- boii boob boog boor bor- borg bori boro borr bory bovi bovo bovy boyg boyi boyo brig brio brob brog broo bror brrr brvi bry- bryo bygg bygo byob byoi gbbo gggg gibb giby gigg gigi gigo giog gioi girg giri giro girr giry givy gobi gobo goby gogi gogo goog gooi goor gorb gorg gori goro gorr gory govi govy grbr grib grig grob grog groi groo gror grov groy grrr grvy gry- gvvv gyor gyr- gyri gyro i-by i-go ibri ibro ibyi igbo iggy igoo igor igri iiii iiio iioi iioo iobi ioby ioii ioio iooi iooo iorg iori irby iri- irig irio iriy irob irov irri ivbv ivig ivor ivry obbo obby oboi obor oboy obri obro obvi ogb oggi oggy ogog ogoi ogri ogro ogry oigo oiii oiry oobi ooby oooo oory orbb orbi orbo orby orgo orgy ori- orig orio oro- oror oroy orri orro orry orvr ovi- ovo- ovoo oyri rbbb rbbr rgbi rib- ribo riby rigg rigi rigo rigy riri rivo riyo rob- robb robi robo roby rogg rogi rogo rogy roig roio roir roob roog rooi roor rori roro rory rovi rovo rrrr ryob vbrg vbyv viby vigo vigr vigy viii virb virg viri viro virr viry vivi vivo vivy voio voir voog voor vor- vori voro vory voyi vrio vvob vvog vvvv vyir ybor ybry ygor yirb yirr yivo yobi yobo yogi yogo yori yoro yory yoyo yvor yyyy