bbbb bbbs bbci bblb bbls bcbc bcbs bccc bcci bccl bccs bcis bcit bcsc bcsl bcss bctc bcts bibb bibi bibl bibs bicc bici bics biis bili bill bils bilt bis- bisc bisl biss bist bitc bits bitt blbt blic blis blit blls blss blst blts bsci bscs bsic bslc bssc bsts btcc btcl btcs btss bttb cbbc cbbs cbcc cbcl cbcs cbct cbit cblb cblc cbsc cbsi cbtc cbtl ccbc cccb cccc ccci cccl cccs ccic ccii ccil ccis cclc ccli ccls ccsi ccsl ccss ccst cctb cctc cctl cctt cibc cibi cicc cici cics cict ciii ciis ciit cili cill cils cilt cis- cisc cisl ciss cist citb citi citl cits citt clib clic clii clis clit clsc cltb cltc clts cscb cscc csci cscl cscs csib csis csit cstc csts ctbi ctbs ctic ctls ctsc ctss ctts ibcs ibis ibss ibtb ibtc ibtl ibts icbc icbs iccb iccc icci iccl iccs icct icis icll icsb icsc icsi icss icst icts iiii iiis iiit iisc iisi iist iitt ilbc ilic ilis ilit ill- illi ills illt ilts isbl isbt iscc isci iscs isct isic isil isis isit isls issc issi isss istc isti ists itbs itcs itic itil itis itll itsi lbcc lbsc lcbc lccc lccs lcis lcls lcsc lctl lcts libc libs lics lict liii liis lilb lili lill lils lilt lisi liss list litb liti litl lits litt llbs llcc llcs lllc llll lscb lscs lsts ltbl ltcc ltci ltcs ltib ltsi lttc s-ib s-ic s-ii sbbs sbcc sbcs sbct sbic sbsi sbst sbtc scbi sccc sccl sccs scct sci- scic scil scis scit scl- sclc scls scsc scsi scsl scst sctc sctl scts sibc sibi sibs sicc sici sics siit sil- silc sili sill sils silt sisc sisi siss sist sit- sitc siti sits sitt sl-i slcc slib slic slit slsc slst slts sscc ssci sscs ssis ssit sslc sslt sssb sssc sssi ssss sstb sstc sstl ssts stbc stbs stcc stcs stib stic stil stis stit stlc stlt stsi stss sttc tbbs tbcb tbcc tbil tbit tbst tcbs tccc tctc tcts tibi tibs ticc tics tiit till tils tilt tisb tisi tiss tist titc titi tits titt tlli tsbc tscc tsis tssi tsst tstc tsts ttbb ttss tttt