-ism bbbb bbbs bibb bibi bibs biis bims birb biri birr birs biru biry bis- biss bisu bisy biys bmir bmmi bmus brim bris brrm brrr brrs brsb brsr brum brus bry- bsim bsms bsrm bssm bubb bubi bubs bubu buir buis buiu bum- bumb bums bur- burb buri burm burr burs buru bury busi buss busu busy buus buyi buys buyu bysb bysi bysm byss bysy i-by ibbm ibim ibis ibms ibri ibss ibus ibuy ibyi iiii iiis iirs iisi iism iisr iisu iium imbi imir immi imms immy imri imrr imsi imsr imss imsu imus irbm irby iri- iris iriy irms irri irrs irus isim isis ismi isms ismy isri issi issr isss issu issy isum isus isys iuiu iums iuss mbbs mbim mbis mbms mbrs mbus mibs miii miis mim- mimi mims mimy miri mirr mirs miru miry mis- misi misr miss misu misy miui miyu mmii mmis mmmm mmms mmsu mmus mmyy mrbb mrbm mrbs mris mrsi msmb msmm msms msmu msrb mssi mssm mssr msus mubi mubs muir muis mumm mums mumu mumy muri murr murs muru mury musi muss musu muys mybb mybi myi- myir myis mymy myrr myry mys- myss myus myys rbbb rbbr rbbs rbis rbms rbss rib- ribs ribu riby riis rimi rimm rims rimu rimy riri rirs risi rism riss risu rius rmbs rrrr rrum rsbi rsis rsum rubb rubi rubs rubu ruby ruis rumb rumi rumm rums rumy ruri rurs ruru rusi russ rusu rusy ruyi ruys ryim ryis rysy s-ib s-ii sbbs sbsi sbus sibi sibs sibu siby siim simi simm sims simy siri sirr sirs siru sisi siss sisu sisy siui sium sius siyi siyu smis smry smss smur smus srby srib srim sris srub ssbr ssby ssis ssri ssrm ssrs sssb sssi sssm ssss sub- subb subi subm subs suir suis sum- sumi sums sumu sumy sur- suri surr surs suru sury sus- susi suss susu susy suum suus suyi suyr suyu syis sym- symi syms syrs syry syss ubbi ubii ubir ubis uims uirr umb- umbi umms umri umsu umus urbi urbs urib urim uris uriu urmi urri urry ursi urss ursu ursy urum urur urus usbr usbs usim usis usmm usms ussb ussr usss ussu ussy usui usus uuri uusi uuuu uyir ybbs ybry yirb yirm yirr yiss ymir ymur ysby ysii yssu ysyb yubu yumi yuri yury yuyu yyyy