bbbb bbbs bbrg bggs bibb bibi bibs bigb bigg bigs bigu biis birb birg biri birr birs biru biry bis- biss bisu bisy biys brig bris brrr brrs brsb brsr brug brus bry- bsgs bubb bubi bubs bubu bugg bugi bugs buir buis buiu bur- burb burg buri burr burs buru bury busi buss busu busy buus buyi buys buyu bygg bysb bysi byss bysy gbbs gggg ggss gibb gibs giby gigg gigi gigs giis girg giri girr girs giru giry giss giur gius grbr grib grig gris grrr grrs grss grub grug grui grur grus gry- grys gsis gsur gubb gubi gubs gubu guby gugb gugg gugi gugu guib guis gurb gurg guri gurr gurs guru gury gusb guss guus guys guyu gyr- gyri gyrs gysi gyss gyuu i-by ibis ibri ibss ibus ibuy ibyi iggs iggy igis igri igus iiii iiis iirs iisi iisr iisu irby irgs iri- irig iris iriy irri irrs irsg irus isis isrg isri issi issr isss issu issy isus isys iugs iuiu iuss rbbb rbbr rbbs rbis rbss rgbi rib- ribs ribu riby rigg rigi rigs rigu rigy riis riri rirs risi riss risu rius rrrr rsbi rsgb rsis rubb rubi rubs rubu ruby rugg rugi rugs ruis ruri rurs ruru rusi russ rusu rusy ruyi ruys ryis rysy s-ib s-ii sbbs sbig sbsi sbus sggg sggs sgss sibi sibs sibu siby sigg sigi sigs sigy siri sirr sirs siru sisi siss sisu sisy siui sius siyi siyu srby srgb srib sris srub ssbr ssby ssgs ssis ssrg ssri ssrs sssb sssi ssss sub- subb subg subi subs sug- sugg sugi suig suir suis sur- surg suri surr surs suru sury sus- susi suss susu susy suus suyi suyr suyu syis syrs syry syss ubbi ubii ubir ubis uggs ugis ugri ugur uguu uirr urbi urbs urgi urgu urib uris uriu urri urry ursi urss ursu ursy urur urus usbr usbs usis ussb ussr usss ussu ussy usui usus uuri uusi uuuu uyir ybbs ybry yirb yirr yiss ysby ysii yssu ysyb yubu yugg yugi yugs yugu yuri yury yuyu yyyy