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bbbb bbbs bbeb bbet bcbc bcbs bccc bccs bcec bces bcet bcsc bcss bctc bcts bcuc bebb bebe beck becs becu beeb beek bees beet beke beks bes- bese besk bess best betc bete bets bett betu beuk bscs bseb bsec bsee bses bset bskt bssc bsse bsts btcc btcs btec btek btss bttb btus bubb bube bubs bubu bucc buce buck bucs bucu bueu buke bukk buku busc buse busk buss bust busu but- bute buts butt buus cbbc cbbs cbcc cbce cbcs cbct cbcu cbec cbee cbet cbsc cbse cbtc cbus ccbc cccb cccc cccs cccu ccee ccss ccst cctb cctc cctt ccuc ccus ccut cebs cebu 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 csus ctbs ctec ctsc ctss ctsu ctts cub- cubb cube cubs cucc cuce cuck cuek cues cuk- cuke cusb cusk cuss cust cusu cut- cutc cute cuts cutt ebbc ebbs ebcc ebes ebus ecbc ecbe eccb eccc ecce ecct eces ecks ecsc ecse ecss ecsu ect- ectc ects ecus eecs eeee eees eeke eeks eese eesk eetc eete eets eetu ekeb ekek ekes eket esbs escb esce escs escu esee esek eses eset eske esks esku esse esst essu estc este ests esus etbc etcc etcs etec etee etes etsu ette ettu eubc euse kbbb kbbc kbbe kbbk kbbs kbbt kbbu kbcb kbce kbck kbcs kbct kbcu kbeb kbec kbee kbek kbes kbet kbkb kbkk kbsb kbsk kbss kbst kbsu kbtb kbtc kbte kbtk kbts kbtt kbub kbuc kbue kbuk kbus kbut kbuu kcbc kcbk kcbs kcbu kccb kccc kcck kcct kccu kceb kcec kcee kcet kceu kckc kckk kcsb kcsc kcse kcss kcst kcsu kctb kctc kcte kctu kcub kcue kcuk kebb kebc kebe kebt kebu keck keek kees keet kekb kekc keke keks keku kesb kesc kesk kess kest ket- ketc kete ketk kets kett ketu keus kkbb kkbe kkbs kkbt kkcb kkck kkcs kkct kkkk kkse kkss kkst kksu kktc kktk kkts kktu kkus kkut kkuu ksbc ksbs kscb ksce ksck kscs kscu ksec ksee ksek kset kskb kske kskk ksks ksku ksse ksss ksst kssu kstb kstc kste kstk ksts kstt kstu ksub ksue ksut ksuu ktbb ktbc ktbt ktbu ktcc ktce ktck ktcs ktec ktee ktek ktkb ktkc ktke ktkk ktks ktkt ktku ktsc ktst ktsu kttc kttk ktts kttt kttu ktub ktuc kubb kubc kube kubs kubu kucb kucc kuce kuek kues kueu kuke kukk kuks kuku kusb kusc kust kusu kute kuts kutt kutu kuub kuuk kuuu sbbs sbcc sbcs sbct sbse sbst sbtc sbtk sbus sccc scce sccs scct scec scee scet sck- scsc scst scsu sctc scts scub scut se-c se-e se-k se-s se-t se-u sebe sebs sebt sec- secc sece seck secs sect secu seeb seec seek sees seet seeu seke sekk sekt seku sesc sese sess sest set- setc sete sets sett skee skes sket skss skue skut sscc ssce sscs ssec ssee sses sset sssb sssc ssss sstb sstc ssts stbc stbs stcc stcs stcu stec stee stek stes stet stks stss sttc stub stuc stue stuk stus stut sub- subb subs suc- succ suck sucs suee sues suet sueu suke suks suku sus- suse susk suss sust susu sute sutu suus tbbs tbcb tbcc tbce tbst tcbs tccc tccu tctc tcts tebu teck tecs tect teec teek tees teet teke tesc tese tess test tete tets tett tetu teuk teut tkts tsbc tscc tsec tses tset tsks tsse tsst tstc tsts ttbb ttss tttt tubb tube tubs tubu tucc tuck tues tuet tuke tuks tusc tusk tuss tust tute tuts tutt tutu ubbe ubek ubet ucbc uces ucsb ucsc ucst ucsu ucut uess ukcc ukek ukes ukeu uksc us-k usbc usbe usbs uscc usce uscs usee uses uset uske ussb ussc usse usss usst ussu ustb ustc uste usts usus utec utes utsc uttu uuuu