bbbb bbbs bbci bbdd bbrc bcbc bcbs bccc bcci bccs bcds bcis bcrs bcru bcsc bcss bcuc bd-r bdbc bddc bdii bdsd bibb bibi bibs bicc bici bics bidi bidr bids bidu biis birb bird biri birr birs biru bis- bisc bisd biss bisu brcb brds bric brid bris brrr brrs brsb brsr bruc brud brus bsbd bsci bscs bsic bsrd bssc bssd bubb bubi bubs bubu bucc buci bucs bucu budb budd budi buds budu buic buid buir buis buiu bur- burb burd buri burr burs buru busc busi buss busu buus c-cd cbbc cbbs cbcc cbcr cbcs cbcu cbdb cbdc cbdi cbds cbid cbir cbrd cbsc cbsi cbus ccbc cccb cccc ccci cccs cccu ccdc ccdi ccdr ccds ccic ccid ccii ccir ccis ccrc ccri ccrs ccsd ccsi ccss ccuc ccus cd-r cdcs cddb cddr cdic cdii cdis cdrs cdss cibc cibi cicc cici cicr cics cicu cidc cidi cidr cids ciid ciii ciis cirb circ ciri cirr cirs cis- cisc cisd cisr ciss ciuc cius crbc crbu crcc crcr crdc crib cric cris criu crss crub crud crus cscb cscc cscd csci cscr cscs csdb csdr csib csid csir csis csrc csrd csrs cssd cssr csur csus cub- cubb cubi cubs cucc cuci cudi cuds cui- cuir cuis curb curd curi curr curs cusb cusd cuss cusu dbcc dbcs dbrs dbss dbus dcbc dccb dccc dcci dccs dccu dcdb dcds dcii dcis dcsc dcss dddd ddrc ddss ddub dibb dibs dici didi dids didu diii diis dird dirr dirs dis- disc disd disi diss dius drbc drib dric drrs drub drui drus druu dsbc dscc dscr dscs dsdr dsrc dsri dsrr dssc dssi dub- dubb dubc dubs dubu ducs dudd duds dudu duid duir duis duri duru dusi duur ibcs ibid ibis ibrc ibrd ibri ibss ibus icbc icbd icbs iccb iccc icci iccr iccs iccu icdc icdd icis icrc icrr icrs icru icsb icsc icsd icsi icsr icss icub icus idcr idic idid idir idis idrc idsc idss idub idus iicd iiii iiis iirc iirs iisc iisd iisi iisr iisu iiuc ircc ircd ircs ircu irdc irds iri- iric irid iris irrc irri irrs irus isbd iscc iscd isci iscr iscs iscu isdb isdc isds isic isis isri issc issi issr isss issu isus iucc iuds iuiu iusd iuss rbbb rbbr rbbs rbds rbis rbsd rbss rcbc rccb rccc rccs rcdc rcds rcic rcid rcis rcrd rcsc rcsd rcsi rcss rib- ribs ribu ricc rics ridc ridd ridi rids riis riri rirs risc risd risi riss risu rius rrrr rsbi rscc rscs rsdd rsds rsid rsis rubb rubi rubs rubu ruci rudd rudi ruds ruid ruis rurc rurd ruri rurs ruru rusi russ rusu ruud s-ib s-ic s-ii sbbs sbcc sbcs sbds sbic sbsd sbsi sbus scbi sccc sccs scdc scds sci- scic scid scir scis scr- scrc scri scrs scsc scsd scsi scsr scsu scub scud scur sdcc sddc sdds sdib sdic sdrc sdrs sdsc sdss sdsu sibc sibi sibs sibu sicc sici sics sicu sidd sidi sidr sids sirc siri sirr sirs siru sisc sisd sisi siss sisu siui sius srbc srcc srib sris srsd srub ssbr sscc ssci sscs ssdc ssdd ssid ssis ssrc ssri ssrs sssb sssc sssi ssss sub- subb subd subi subs suc- succ suci sucr sucs sudd sudi suds suid suir suis sur- surc surd suri surr surs suru sus- susd susi suss susu suus ubbi ubic ubid ubii ubir ubis ubud ucbc ucci ucdc ucdd ucrc ucsb ucsc ucsd ucsu udbc uddi udds udic udid udir udsd uirr uisd urbi urbs urci urds urdu urib uric uris uriu urri ursi urss ursu urur urus usbc usbr usbs uscc uscs usdc usds usis ussb ussc ussr usss ussu usui usus uuri uusi uuuu