-ism bbbb bbbs bibb bibi bibs biis bims bis- biss bisu bisy biys bmmi bmus bsim bsms bssm bubb bubi bubs bubu buis buiu bum- bumb bums busi buss busu busy buus buyi buys buyu bysb bysi bysm byss bysy i-by ibbm ibim ibis ibms ibss ibus ibuy ibyi iiii iiis iisi iism iisu iium imbi immi imms immy imsi imss imsu imus isim isis ismi isms ismy issi isss issu issy isum isus isys iuiu iums iuss mbbs mbim mbis mbms mbus mibs miii miis mim- mimi mims mimy mis- misi miss misu misy miui miyu mmii mmis mmmm mmms mmsu mmus mmyy msmb msmm msms msmu mssi mssm msus mubi mubs muis mumm mums mumu mumy musi muss musu muys mybb mybi myi- myis mymy mys- myss myus myys s-ib s-ii sbbs sbsi sbus sibi sibs sibu siby siim simi simm sims simy sisi siss sisu sisy siui sium sius siyi siyu smis smss smus ssby ssis sssb sssi sssm ssss sub- subb subi subm subs suis sum- sumi sums sumu sumy sus- susi suss susu susy suum suus suyi suyu syis sym- symi syms syss ubbi ubii ubis uims umb- umbi umms umsu umus usbs usim usis usmm usms ussb usss ussu ussy usui usus uusi uuuu ybbs yiss ysby ysii yssu ysyb yubu yumi yuyu yyyy