bbbb bbbs bbrg bggs bibb bibi bibs bigb bigg bigs biis birb birg biri birr birs biry bis- biss bisy biys brig bris brrr brrs brsb brsr bry- bsgs bygg bysb bysi byss bysy gbbs gggg ggss gibb gibs giby gigg gigi gigs giis girg giri girr girs giry giss grbr grib grig gris grrr grrs grss gry- grys gsis gyr- gyri gyrs gysi gyss i-by ibis ibri ibss ibyi iggs iggy igis igri iiii iiis iirs iisi iisr irby irgs iri- irig iris iriy irri irrs irsg isis isrg isri issi issr isss issy isys rbbb rbbr rbbs rbis rbss rgbi rib- ribs riby rigg rigi rigs rigy riis riri rirs risi riss rrrr rsbi rsgb rsis ryis rysy s-ib s-ii sbbs sbig sbsi sggg sggs sgss sibi sibs siby sigg sigi sigs sigy siri sirr sirs sisi siss sisy siyi srby srgb srib sris ssbr ssby ssgs ssis ssrg ssri ssrs sssb sssi ssss syis syrs syry syss ybbs ybry yirb yirr yiss ysby ysii ysyb yyyy