bbbb bbbs bbeb bbet bcbc bcbs bccc bccs bcec bces bcet bcsc bcss bctc bcts bebb bebe beck becs beeb beek bees beet beke beks bes- bese besk bess best betc bete bets bett bscs bseb bsec bsee bses bset bskt bssc bsse bsts btcc btcs btec btek btss bttb cbbc cbbs cbcc cbce cbcs cbct cbec cbee cbet cbsc cbse cbtc ccbc cccb cccc cccs ccee ccss ccst cctb cctc cctt cebs cec- cece cecs cect ceeb ceec cees ceke cesc cese cess cest cet- cete cets ckbc ckbe ckck ckcs cksb ckst cktb ckts cscb cscc csce cscs csec csee cset csks csse cstc csts ctbs ctec ctsc ctss ctts ebbc ebbs ebcc ebes ecbc ecbe eccb eccc ecce ecct eces ecks ecsc ecse ecss ect- ectc ects eecs eeee eees eeke eeks eese eesk eetc eete eets ekeb ekek ekes eket esbs escb esce escs esee esek eses eset eske esks esse esst estc este ests etbc etcc etcs etec etee etes ette kbbb kbbc kbbe kbbk kbbs kbbt kbcb kbce kbck kbcs kbct kbeb kbec kbee kbek kbes kbet kbkb kbkk kbsb kbsk kbss kbst kbtb kbtc kbte kbtk kbts kbtt kcbc kcbk kcbs kccb kccc kcck kcct kceb kcec kcee kcet kckc kckk kcsb kcsc kcse kcss kcst kctb kctc kcte kebb kebc kebe kebt keck keek kees keet kekb kekc keke keks kesb kesc kesk kess kest ket- ketc kete ketk kets kett kkbb kkbe kkbs kkbt kkcb kkck kkcs kkct kkkk kkse kkss kkst kktc kktk kkts ksbc ksbs kscb ksce ksck kscs ksec ksee ksek kset kskb kske kskk ksks ksse ksss ksst kstb kstc kste kstk ksts kstt ktbb ktbc ktbt ktcc ktce ktck ktcs ktec ktee ktek ktkb ktkc ktke ktkk ktks ktkt ktsc ktst kttc kttk ktts kttt sbbs sbcc sbcs sbct sbse sbst sbtc sbtk sccc scce sccs scct scec scee scet sck- scsc scst sctc scts se-c se-e se-k se-s se-t sebe sebs sebt sec- secc sece seck secs sect seeb seec seek sees seet seke sekk sekt sesc sese sess sest set- setc sete sets sett skee skes sket skss sscc ssce sscs ssec ssee sses sset sssb sssc ssss sstb sstc ssts stbc stbs stcc stcs stec stee stek stes stet stks stss sttc tbbs tbcb tbcc tbce tbst tcbs tccc tctc tcts teck tecs tect teec teek tees teet teke tesc tese tess test tete tets tett tkts tsbc tscc tsec tses tset tsks tsse tsst tstc tsts ttbb ttss tttt