-ism bbbb bbbs bblb bbls bibb bibi bibl bibs biis bili bill bils bilu bims birb biri birl birr birs biru bis- bisl biss bisu blim blir blis blls blss blub blum blur blus bmir bmmi bmus bril brim bris brls brrm brrr brrs brsb brsr brum brus bsim bsms bsrm bssm bubb bubi bubs bubu buir buis buiu bulb buli bull buls bulu bum- bumb bums bur- burb buri burl burm burr burs buru busi buss busu buus ibbm ibim ibis ibml ibms ibri ibss ibus iiii iiis iirs iisi iism iisr iisu iium ilbm ilir ilis ill- illi ills ilmr ilrm ilum ilus imbi imir imli immi imms imri imrr imsi imsr imss imsu imus irbm iri- iril iris irlb irms irri irrs irul irus isbl isil isim isis isls ismi isms isri issi issr isss issu isum isus iuiu iums iuss lblr lbms lbrs libr libs libu liii liir liis lilb lili lill lils lilu limb limi liml limm lims limu liri lirl lirr lirs liru lisi liss lisu lius llbs llll llms lmii lmmr lmms lmrs lmsi lmsr lrrr lrsm ls-r lsbu lssr lubs luis luli lull lulu lumb lumi lums luri lurs lusi luss mbbs mbim mbis mbms mbrs mbsl mbus mibs miii miis mili mill milr mils milu mim- mimi mims miri mirl mirr mirs miru mis- misi misl misr miss misu miui mlii mlis mlrs mlss mmii mmis mmli mmmm mmms mmsu mmus mrbb mrbm mrbs mris mrls mrml mrsi mrsl msil msmb msml msmm msms msmu msrb mssi mssm mssr msus mubi mubs muil muir muis muli mull mulm mulu mumm mums mumu muri murl murr murs muru musi musl muss musu rbbb rbbr rbbs rbis rbms rbsl rbss rib- ribs ribu riis rill rilu rimi rimm rims rimu riri rirs risi rism riss risu rius rlls rlml rlms rmbs rmll rrrr rrum rsbi rsis rsml rssl rsum rubb rubi rubs rubu ruis rull rumb rumi ruml rumm rums ruri rurs ruru rusi russ rusu s-ib s-ii sbbs sbml sbsi sbus sibi sibs sibu siim sil- sili sill sils silu simi simm sims siri sirr sirs siru sisi siss sisu siui sium sius sl-i slib slim slir sllm slmm slrs slsu slub slum slur smil smis smls smss smur smus srib srim sris srub ssbr ssis ssml ssri ssrl ssrm ssrs sssb sssi sssm ssss sub- subb subi subl subm subs suir suis sul- suli sull sulm sulu sum- sumi sums sumu sur- suri surr surs suru sus- susi suss susu suum suus ubbi ubii ubir ubis ubli ubls uiml uims uirr ulim ulli ullr ulmi ulmu ulul ulum ulus umb- umbi umms umri umsu umus urbi urbs urib urim uris uriu urls urmi urri ursi urss ursu urum urur urus usbl usbr usbs usim usis uslu usmm usms ussb ussr usss ussu usui usul usus uulu uuri uusi uuuu