-ism bbbb bbbs bibb bibi bibs biis bims bis- biss bist bisu bits bitt bitu bmmi bmts bmus bsim bsms bsmt bssm bsts btss bttb btus bubb bubi bubs bubu buis buit buiu bum- bumb bums busi buss bust busu but- buti buts butt buus ibbm ibim ibis ibms ibss ibtb ibts ibus iiii iiis iiit iisi iism iist iisu iitm iitt iium imbi imit immi imms immt imsi imss imst imsu imts imus isbt isim isis isit ismi isms issi isss issu isti ists isum isus itbs itim itis itms itsi itsu itum iuiu iums iuss iust mbbs mbim mbis mbms mbus mibs miii miis miit mim- mimi mims mis- misi miss mist misu mit- mitb miti mitm mits mitt mitu miui mmii mmis mmmm mmms mmst mmsu mmts mmus msmb msmm msms msmu mssi mssm msst msts msus mtbs mtss mtst mtts mubi mubs muis muit mumm mums mumu musi muss must musu muti muts mutt mutu muut s-ib s-ii sbbs sbsi sbst sbus sibi sibs sibu siim siit simi simm sims simt sisi siss sist sisu sit- siti sits sitt situ siui sium sius siut smis smit smss smti smtu smus smut ssis ssit sssb sssi sssm ssss sstb ssts stbs stib stim stis stit stms stmt stsi stsm stss stub stum stus stut sub- subb subi subm subs suis suit sum- sumi sums sumu sus- susi suss sust susu suti sutu suum suus tbbs tbit tbst tibi tibs tibu tiit tiiu timi timm tims timu tisb tisi tism tiss tist titi tits titt titu tium tmsi tmtt tsis tssi tssm tsst tstm tsts tsui tsum ttbb ttim ttms ttss tttt tubb tubs tubu tuim tuis tuit tuiu tumb tumi tums tumu tusi tusm tuss tust tuti tuts tutt tutu tuum ubbi ubii ubis ubit uims uist uits umb- umbi umit umms umsu umts umus umut usbs usim usis usmm usms ussb usss usst ussu ustb usti ustm usts usui usus utis utmb utti uttu uusi uuuu