bbbb bbbs bbci bbdd bbrc bcbc bcbs bccc bcci bccs bcds bcis bcrs bcsc bcss bd-r bdbc bddc bdii bdsd bibb bibi bibs bicc bici bics bidi bidr bids biis birb bird biri birr birs bis- bisc bisd biss brcb brds bric brid bris brrr brrs brsb brsr bsbd bsci bscs bsic bsrd bssc bssd c-cd cbbc cbbs cbcc cbcr cbcs cbdb cbdc cbdi cbds cbid cbir cbrd cbsc cbsi ccbc cccb cccc ccci cccs ccdc ccdi ccdr ccds ccic ccid ccii ccir ccis ccrc ccri ccrs ccsd ccsi ccss cd-r cdcs cddb cddr cdic cdii cdis cdrs cdss cibc cibi cicc cici cicr cics cidc cidi cidr cids ciid ciii ciis cirb circ ciri cirr cirs cis- cisc cisd cisr ciss crbc crcc crcr crdc crib cric cris crss cscb cscc cscd csci cscr cscs csdb csdr csib csid csir csis csrc csrd csrs cssd cssr dbcc dbcs dbrs dbss dcbc dccb dccc dcci dccs dcdb dcds dcii dcis dcsc dcss dddd ddrc ddss dibb dibs dici didi dids diii diis dird dirr dirs dis- disc disd disi diss drbc drib dric drrs dsbc dscc dscr dscs dsdr dsrc dsri dsrr dssc dssi ibcs ibid ibis ibrc ibrd ibri ibss icbc icbd icbs iccb iccc icci iccr iccs icdc icdd icis icrc icrr icrs icsb icsc icsd icsi icsr icss idcr idic idid idir idis idrc idsc idss iicd iiii iiis iirc iirs iisc iisd iisi iisr ircc ircd ircs irdc irds iri- iric irid iris irrc irri irrs isbd iscc iscd isci iscr iscs isdb isdc isds isic isis isri issc issi issr isss rbbb rbbr rbbs rbds rbis rbsd rbss rcbc rccb rccc rccs rcdc rcds rcic rcid rcis rcrd rcsc rcsd rcsi rcss rib- ribs ricc rics ridc ridd ridi rids riis riri rirs risc risd risi riss rrrr rsbi rscc rscs rsdd rsds rsid rsis s-ib s-ic s-ii sbbs sbcc sbcs sbds sbic sbsd sbsi scbi sccc sccs scdc scds sci- scic scid scir scis scr- scrc scri scrs scsc scsd scsi scsr sdcc sddc sdds sdib sdic sdrc sdrs sdsc sdss sibc sibi sibs sicc sici sics sidd sidi sidr sids sirc siri sirr sirs sisc sisd sisi siss srbc srcc srib sris srsd ssbr sscc ssci sscs ssdc ssdd ssid ssis ssrc ssri ssrs sssb sssc sssi ssss