bbbb bbbs bbci bcbc bcbs bccc bcci bccs bcis bcsc bcss bcuc bibb bibi bibs bicc bici bics biis bis- bisc biss bisu bsci bscs bsic bssc bubb bubi bubs bubu bucc buci bucs bucu buic buis buiu busc busi buss busu buus cbbc cbbs cbcc cbcs cbcu cbsc cbsi cbus ccbc cccb cccc ccci cccs cccu ccic ccii ccis ccsi ccss ccuc ccus cibc cibi cicc cici cics cicu ciii ciis cis- cisc ciss ciuc cius cscb cscc csci cscs csib csis csus cub- cubb cubi cubs cucc cuci cui- cuis cusb cuss cusu ibcs ibis ibss ibus icbc icbs iccb iccc icci iccs iccu icis icsb icsc icsi icss icub icus iiii iiis iisc iisi iisu iiuc iscc isci iscs iscu isic isis issc issi isss issu isus iucc iuiu iuss s-ib s-ic s-ii sbbs sbcc sbcs sbic sbsi sbus scbi sccc sccs sci- scic scis scsc scsi scsu scub sibc sibi sibs sibu sicc sici sics sicu sisc sisi siss sisu siui sius sscc ssci sscs ssis sssb sssc sssi ssss sub- subb subi subs suc- succ suci sucs suis sus- susi suss susu suus ubbi ubic ubii ubis ucbc ucci ucsb ucsc ucsu usbc usbs uscc uscs usis ussb ussc usss ussu usui usus uusi uuuu