bbbb bbbs bbci bbrc bcbc bcbs bccc bcci bccs bcis bcrs bcsc bcss bibb bibi bibs bicc bici bick bics biis birb biri birk birr birs bis- bisc bisk biss brcb bric brik bris brkb brrr brrs brsb brsr bsci bscs bsic bssc cbbc cbbs cbcc cbcr cbcs cbir cbkr cbsc cbsi ccbc cccb cccc ccci cccs ccic ccii ccir ccis ccrc ccri ccrs ccsi ccss cibc cibi cicc cici cicr cics ciii ciis cikr cirb circ ciri cirk cirr cirs cis- cisc cisk cisr ciss ckbc ckbi ckck ckcs ckrc cksb crbc crcc crcr crib cric crik cris crkc crss cscb cscc csci cscr cscs csib csik csir csis csks csrc csrs cssr ibcs ibis ibrc ibri ibss icbc icbs iccb iccc icci iccr iccs icis icks icrc icrr icrs icsb icsc icsi icsr icss iiii iiis iirc iirs iisc iisi iisr ikki ikri ircc ircs iri- iric iris irki irks irrc irri irrs iscc isci iscr iscs isic isis isri issc issi issr isss k-ci kbbb kbbc kbbi kbbk kbbr kbbs kbcb kbci kbck kbcr kbcs kbib kbic kbik kbis kbkb kbkk kbkr kbrb kbrc kbri kbrk kbsb kbsi kbsk kbsr kbss kcbc kcbi kcbk kcbr kcbs kccb kccc kcci kcck kccr kcic kcii kcir kcis kckc kckk kckr kcrc kcri kcrr kcrs kcsb kcsc kcsi kcsr kcss kibb kibc kibi kibr kibs kicb kicc kick kicr kics kiic kiii kiik kiis kikc kiki kikk kikr kirb kirc kiri kirk kirr kirs kisc kisi kisk kisr kiss kkbb kkbi kkbr kkbs kkcb kkci kkck kkcr kkcs kkic kkik kkkk kkrb kkrc kkrk kkrr kkrs kksi kksr kkss krbb krbi krbk krbr krcb krcc krci krcs krib krik kris krkc krki krkk krkr krks krrb krrc krri krrk krrr krrs krsc krsk krsr krss ksbc ksbi ksbr ksbs kscb ksci ksck kscr kscs ksib ksii ksik ksir ksis kskb kskk kskr ksks ksrb ksrr ksrs kssi kssr ksss rbbb rbbr rbbs rbis rbss rcbc rccb rccc rccs rcic rcis rcsc rcsi rcss rib- ribs ricc rick rics riis riki rikk riri rirs risc risi risk riss rkss rrrr rsbi rscc rscs rsis s-ib s-ic s-ii sbbs sbcc sbcs sbic sbrk sbsi scbi sccc sccs sci- scic scir scis sck- scr- scrc scri scrs scsc scsi scsr sibc sibi sibs sicc sici sick sics siik siki sikr siks sirc siri sirk sirr sirs sisc sisi sisk siss skic skik skir skis skss srbc srcc srib sris ssbr sscc ssci sscs ssis ssrc ssri ssrs sssb sssc sssi ssss