bbbb bbbs bbci bbrc bcbc bcbs bccc bcci bccs bcis bcrs bcsc bcss bibb bibi bibs bicc bici bics biis birb biri birr birs bis- bisc biss brcb bric bris brrr brrs brsb brsr bsci bscs bsic bssc cbbc cbbs cbcc cbcr cbcs cbir cbsc cbsi ccbc cccb cccc ccci cccs ccic ccii ccir ccis ccrc ccri ccrs ccsi ccss cibc cibi cicc cici cicr cics ciii ciis cirb circ ciri cirr cirs cis- cisc cisr ciss crbc crcc crcr crib cric cris crss cscb cscc csci cscr cscs csib csir csis csrc csrs cssr ibcs ibis ibrc ibri ibss icbc icbs iccb iccc icci iccr iccs icis icrc icrr icrs icsb icsc icsi icsr icss iiii iiis iirc iirs iisc iisi iisr ircc ircs iri- iric iris irrc irri irrs iscc isci iscr iscs isic isis isri issc issi issr isss rbbb rbbr rbbs rbis rbss rcbc rccb rccc rccs rcic rcis rcsc rcsi rcss rib- ribs ricc rics riis riri rirs risc risi riss rrrr rsbi rscc rscs rsis s-ib s-ic s-ii sbbs sbcc sbcs sbic sbsi scbi sccc sccs sci- scic scir scis scr- scrc scri scrs scsc scsi scsr sibc sibi sibs sicc sici sics sirc siri sirr sirs sisc sisi siss srbc srcc srib sris ssbr sscc ssci sscs ssis ssrc ssri ssrs sssb sssc sssi ssss