bbbb bbbs bbci bcbc bcbs bccc bcci bccs bcis bcit bcsc bcss bctc bcts bcuc bibb bibi bibs bicc bici bics biis bis- bisc biss bist bisu bitc bits bitt bitu bsci bscs bsic bssc bsts btcc btcs btss bttb btus bubb bubi bubs bubu bucc buci bucs bucu buic buis buit buiu busc busi buss bust busu but- buti buts butt buus cbbc cbbs cbcc cbcs cbct cbcu cbit cbsc cbsi cbtc cbus ccbc cccb cccc ccci cccs cccu ccic ccii ccis ccsi ccss ccst cctb cctc cctt ccuc ccus ccut cibc cibi cicc cici cics cict cicu ciii ciis ciit cis- cisc ciss cist citb citi cits citt citu ciuc cius cscb cscc csci cscs csib csis csit cstc csts csus ctbi ctbs ctic ctsc ctss ctsu ctts cub- cubb cubi cubs cucc cuci cui- cuis cuit cusb cuss cust cusu cut- cutc cuts cutt ibcs ibis ibss ibtb ibtc ibts ibus icbc icbs iccb iccc icci iccs icct iccu icis icsb icsc icsi icss icst icts icub icus iiii iiis iiit iisc iisi iist iisu iitt iiuc isbt iscc isci iscs isct iscu isic isis isit issc issi isss issu istc isti ists isus itbs itcs itic itis itsi itsu iucc iuiu iuss iust s-ib s-ic s-ii sbbs sbcc sbcs sbct sbic sbsi sbst sbtc sbus scbi sccc sccs scct sci- scic scis scit scsc scsi scst scsu sctc scts scub scut sibc sibi sibs sibu sicc sici sics sicu siit sisc sisi siss sist sisu sit- sitc siti sits sitt situ siui sius siut sscc ssci sscs ssis ssit sssb sssc sssi ssss sstb sstc ssts stbc stbs stcc stcs stcu stib stic stis stit stsi stss sttc stub stuc stus stut sub- subb subi subs suc- succ suci sucs suis suit sus- susi suss sust susu suti sutu suus tbbs tbcb tbcc tbit tbst tcbs tccc tccu tctc tcts tibi tibs tibu ticc tics tiit tiiu tisb tisi tiss tist titc titi tits titt titu tsbc tscc tsis tssi tsst tstc tsts tsui ttbb ttss tttt tubb tubs tubu tucc tuis tuit tuiu tusc tusi tuss tust tuti tuts tutt tutu ubbi ubic ubii ubis ubit ucbc ucci ucsb ucsc ucst ucsu ucut uist uits usbc usbs uscc uscs usis ussb ussc usss usst ussu ustb ustc usti usts usui usus utis utsc utti uttu uusi uuuu