-ism bbbb bbbs bbfn bbin bffs bfsi bfsr bibb bibi bibs biff bifi biin biis bims bin- bini binn bins binu birb biri birn birr birs biru bis- biss bisu bmir bmmi bmus bnib bnim bnin bnrr bnss brfm brfu brim brin bris brns brrm brrr brrs brsb brsr brum brun brus bsff bsfs bsim bsin bsms bsns bsrm bssm bubb bubi bubs bubu buff bufr buif buin buir buis buiu bum- bumb bumf bums bunb buni bunn buns bunu bur- burb buri burm burn burr burs buru busi buss busu buus fbis fbrs fbus ffff ffii ffrr ffss ffun fibs fiff fifi fifm fiii fimr fini finn fins firm firn firs fisi fism fiss fisu fmri fmsr fmss fnrs fnuf frib frim frin fris frmn frns frsb frsm frub frum frun fsfi fsim fssf fubb fubs fubu fuff fufu fuir fumi fums funf funs fur- furi furm furn furr furs fusi fuss fusu ibbm ibfi ibim ibis ibms ibns ibri ibsf ibsn ibss ibus ifbb ifim ifis ifni ifnr ifns ifrb ifrf ifri ifsb iiii iiis iinm iirs iisi iism iisr iisu iium imbi imfi imin imir immi imms imri imrr imsf imsi imsr imss imsu imun imus infi infs inis inni innr inns innu inri inrs inss insu inui inun inus irbm irfm irfu iri- irin iris irms irri irrs irsf irun irus isbn isim isin isis ismi isms isri issf issi issr isss issu isum isus iuiu iums iuss mbbs mbim mbis mbms mbrs mbsf mbus mfbm mfri mfrs mfsb mibs miff mifi miii miin miis mim- mimi mims mini minn mins minu miri mirr mirs miru mis- misi misn misr miss misu miui mmff mmii mmis mmmm mmms mmrf mmsu mmun mmus mnbb mnin mnis mrbb mrbm mrbs mris mrsi msff msfs msmb msmm msms msmu msrb mssf mssi mssm mssr msun msus mubi mubs muff mufi mufu muin muir muis mumm mums mumu muni munn muns munu muri murn murr murs muru musi muss musu n-ii nbuf nfff nfib nfrs nfsm nfsr nfsu nibi nibm nibs niff niir niiu nimb nimi nimr nims nimu nini nins nirs niru nisi niss nisu niur nmff nmfs nmis nmri nnnn nnss nsbm nsfs nsin nsis nsmb nsnr nssb nssf nssr nsss nsub nubi nubs nuff nuim nuin numb numi numm nums numu nunn nuns nuri nurn nurr nurs nuru nusi nuss nusu rbbb rbbr rbbs rbis rbms rbss rib- ribs ribu riff rifs rifu riif riin riis rimi rimm rims rimu rinf rinn riri rirs risi rism riss risu rius rmbs rmif rnbr rnin rrif rrrr rrum rrun rsbi rsis rsnn rsnr rsum rubb rubi rubs rubu ruff ruif ruin ruis rumb rumi rumm rums runf runi runn runs ruri rurs ruru rusi russ rusu ruun s-ib s-ii sbbs sbsi sbus sfmm sfnb sfss sfsu sibi sibs sibu siff sifr sifu siim simi simm sims sini sinn sins sinu sirf siri sirr sirs siru sisi siss sisu siui sium sius smbf smif smin smis smrf smsn smss smur smus snfu snib snir snns snrs snub snum snur snus srfi srib srim sris srni srnn srub ssbn ssbr ssin ssis ssns ssri ssrm ssrs sssb sssf sssi sssm ssss sub- subb subi subm subs suf- suff sufi sufr sufs sufu suin suir suis sum- sumi sums sumu sun- sunb suni sunn suns sunu sur- surf suri surn surr surs suru sus- susi suss susu suum suus ubbi ubii ubir ubis ufms uims uirr umb- umbi umff umms umri umsu umus uni- unif unii unin unir unis unmr unni unns unrf unrs uns- unum unus urbi urbs urff urfi urib urif urim urin uris uriu urmi urni urns urri ursi urss ursu urum urun urur urus usbr usbs usfi usfs usif usim usin usis usmm usms usnr usnu ussb ussf ussr usss ussu usui usun usus uuni uuri uusi uuuu