-ism bbbb bbbs bbgm bbmg bbrg bffs bfgf bfsi bfsr bfts bftt bggs bgst bibb bibi bibs biff bifi bigb bigg bigs bigt bigu biis bims birb birg biri birr birs birt biru bis- biss bist bisu bits bitt bitu bmgs bmir bmmi bmts bmus brfm brfu brig brim bris brit brrm brrr brrs brsb brsr brst brug brum brus brut bsff bsfs bsgs bsim bsms bsmt bsrm bssm bsts btrt btss bttb btus bubb bubi bubs bubu buff bufr bugg bugi bugs buif buir buis buit buiu bum- bumb bumf bums bur- burb burg buri burm burr burs burt buru busi buss bust busu but- buti buts butt buus fbis fbrs fbus ffff ffii ffrr ffss fftf fgts fibs fiff fifi fifm fift figg figs fiii fimr firm firs fisi fism fiss fist fisu fiti fits fitt fmri fmsr fmss frib frig frim fris frit frsb frsm frst frub frug frum fsfi fsgs fsim fssf ftii ftrs ftsr ftub fubb fubs fubu fuff fufu fugi fugs fugu fuig fuir fuit fumi fums fur- furg furi furm furr furs furt fusi fuss fust fusu futi futs futu gbbs gfms ggbt ggfg gggg ggss gibb gibs giff gifs gift gifu gigg gigi gigs giis girg giri girr girs girt giru gism giss gist gits giur gius gmit gmmr gmrs grbr grib grif grig grim gris grit grmt grrr grrs grsm grss grub gruf grug grui grum grur grus grut gsif gsis gstr gsur gtbr gtfm gtsm gubb gubi gubs gubu guff gugb gugg gugi gugu guib guis gumb gumi gumm gums gurb gurg guri gurr gurs gurt guru gusb guss gust guti guts gutt gutu guus ibbm ibfi ibim ibis ibms ibri ibsf ibss ibtb ibts ibus ifbb ifim ifis ifit ifrb ifrf ifri ifsb iggs igis igri igsm igus iiii iiis iiit iirs iisi iism iisr iist iisu iitm iitr iitt iium imbi imfi imir imit immi imms immt imri imrr imsf imsi imsr imss imst imsu imts imus irbm irfm irfu irgm irgs iri- irig iris irms irri irrs irsf irsg irtf irti irts irus isbt isim isis isit ismi isms isrg isri issf issi issr isss issu isti istr ists isum isus itbs itgs itif itim itis itms itrf itri itrs itsf itsi itsu ittf itum itur iugs iuiu iums iuss iust mbbs mbim mbis mbms mbrs mbsf mbus mfbm mfri mfrs mfsb mftf mgbs mgit mgmt mgrm mgrs mgsm mgts mgus mibs miff mifi migg migi migs migu miii miis miit mim- mimi mims mirg miri mirr mirs mirt miru mis- misg misi misr miss mist misu mit- mitb miti mitm mits mitt mitu miui mmff mmii mmis mmmm mmms mmrf mmst mmsu mmts mmus mrbb mrbm mrbs mris mrsi mrtm mrts mrtt msff msfs msft msgr msgs msgt msmb msmm msms msmu msrb msrt mssf mssg mssi mssm mssr msst mstr msts msus mtbs mtff mtgs mtrr mtss mtst mttr mtts mubi mubs muff mufi mufu mugg mugi mugs mugu muir muis muit mumm mums mumu murg muri murr murs murt muru musi muss must musu muti muts mutt mutu muut rbbb rbbr rbbs rbis rbms rbss rbst rfgs rgbi rgit rgtr rgts rib- ribs ribu riff rifs rift rifu rigg rigi rigs rigu riif riis rimi rimm rims rimu riri rirs risi rism riss rist risu riti rits ritt ritu rius rmbs rmif rmrg rmst rmtu rrif rrrr rrum rsbi rsgb rsis rsmg rsts rstu rsum rtbf rtfb rtfm rtgs rtmi rtms rtss rtts rubb rubi rubs rubu ruff ruft rugg rugi rugs ruif ruis ruit rumb rumi rumm rums rumt ruri rurs ruru rusi russ rust rusu ruti ruts rutt rutu s-ib s-ii sbbs sbig sbsi sbst sbus sfmm sfss sfsu sfts sggg sggs sgsm sgss sgts sibi sibs sibu siff sifr sift sifu sigg sigi sigs siim siit simi simm sims simt sirf siri sirr sirs sirt siru sisi siss sist sisu sit- siti sits sitt situ siui sium sius siut smbf smgs smif smig smis smit smrf smrt smss smti smtu smug smur smus smut srfi srgb srib srim sris srtr srub ssbr ssgs ssgt ssis ssit ssrg ssri ssrm ssrs sssb sssf sssi sssm ssss sstb ssts stbs stfu stgr stib stif stig stim stir stis stit stms stmt stri strs stru stsf stsi stsm stss sttr stub stuf stug stum stur stus stut sub- subb subg subi subm subs suf- suff sufi sufr sufs sufu sug- sugg sugi suig suir suis suit sum- sumi sums sumu sur- surf surg suri surr surs surt suru sus- susi suss sust susu suti sutu suum suus tbbs tbgs tbit tbrb tbst tfrs tfsi tfss tgif tgts tibi tibs tibu tiff tift tigi tigm tigr tigs tiit tiiu timi timm tims timu tirb tiri tirr tirs tiru tisb tisi tism tiss tist titi tits titt titu tium tmbg tmbr tmsi tmtt trfm trfr tri- trib trif trig trim tris trit trmb trmi trms trmu trsi trst trtr trub trug trus trut truu tsfm tsgt tsig tsis tssf tssg tssi tssm tssr tsst tstm tsts tsui tsum ttbb ttff ttim ttms ttss tttt tubb tubr tubs tubu tuff tufi tufm tuft tufu tugg tugs tugu tuig tuim tuis tuit tuiu tumb tumi tums tumu turb turf turg turi turm turr turs turt turu tusi tusm tuss tust tuti tuts tutt tutu tuum ubbi ubii ubir ubis ubit ubtf ufms uggs uggt ugis ugri ugur uguu uims uirr uist uits umb- umbi umff umfg umit ummg umms umri umsu umts umus umut urbi urbs urff urfi urft urgi urgu urib urif urim uris uriu urmi urri ursi urss ursu urts urum urur urus urut usbr usbs usfi usfs usif usim usis usmm usms ussb ussf ussr usss usst ussu ustb usti ustm usts usui usus utis utmb utri utti uttu utug uuri uusi uutf uuuu