bbbb bbbs bcbc bcbs bccc bccs bcsc bcss bctc bcts bscs bskt bssc bsts btcc btcs btss bttb cbbc cbbs cbcc cbcs cbct cbsc cbtc ccbc cccb cccc cccs ccss ccst cctb cctc cctt ckbc ckck ckcs cksb ckst cktb ckts cscb cscc cscs csks cstc csts ctbs ctsc ctss ctts kbbb kbbc kbbk kbbs kbbt kbcb kbck kbcs kbct kbkb kbkk kbsb kbsk kbss kbst kbtb kbtc kbtk kbts kbtt kcbc kcbk kcbs kccb kccc kcck kcct kckc kckk kcsb kcsc kcss kcst kctb kctc kkbb kkbs kkbt kkcb kkck kkcs kkct kkkk kkss kkst kktc kktk kkts ksbc ksbs kscb ksck kscs kskb kskk ksks ksss ksst kstb kstc kstk ksts kstt ktbb ktbc ktbt ktcc ktck ktcs ktkb ktkc ktkk ktks ktkt ktsc ktst kttc kttk ktts kttt sbbs sbcc sbcs sbct sbst sbtc sbtk sccc sccs scct sck- scsc scst sctc scts skss sscc sscs sssb sssc ssss sstb sstc ssts stbc stbs stcc stcs stks stss sttc tbbs tbcb tbcc tbst tcbs tccc tctc tcts tkts tsbc tscc tsks tsst tstc tsts ttbb ttss tttt