bbbb bbbs bbci bbeb bbet bcbc bcbs bccc bcci bccs bcec bces bcet bcie bcis bcit bcsc bcss bctc bcts bebb bebe bebi beci becs beeb bees beet beic beis beit bes- bese bess best betc bete beti bets bett bibb bibe bibi bibs bicc bice bici bics bieb bies biet biis bis- bisc bise biss bist bitc bite bits bitt bsci bscs bseb bsec bsee bses bset bsic bssc bsse bsts btcc btcs btec btie btss bttb cbbc cbbs cbcc cbce cbcs cbct cbec cbee cbet cbit cbsc cbse cbsi cbtc ccbc cccb cccc ccci cccs ccee ccic ccii ccis ccsi ccss ccst cctb cctc cctt cebs cec- cece ceci cecs cect ceeb ceec cees cesc cese cesi cess cest cet- cete ceti cets cibc cibe cibi cicc cici cics cict ciee cies ciii ciis ciit cis- cisc cise ciss cist citb cite citi cits citt cscb cscc csce csci cscs csec csee cset csib csis csit csse cstc csts ctbi ctbs ctec ctic ctsc ctss ctts ebbc ebbs ebcc ebes ebic ebis ebit ecbc ecbe eccb eccc ecce ecci ecct eces ecib ecis ecit ecsc ecse ecss ect- ectc ects eecs eeee eees eese eesi eetc eete eets eics eiec eiei eies eise eiss eist eitb eitc eiti esbs escb esce esci escs esee eses eset esie esis esit esse essi esst estc este ests etbc etcc etcs etec etee etes etic etsi ette etti i-be ibcs ibec ibes ibet ibie ibis ibss ibtb ibtc ibts icbc icbs iccb iccc icci iccs icct icec icee ices icet icis icsb icsc icse icsi icss icst icts iecc ieet ieie iesc iesi iest iett iies iiie iiii iiis iiit iisc iisi iist iitt isbe isbt iscc isci iscs isct iseb isec isee ises iset isic isie isis isit issc isse issi isss istc iste isti ists itbe itbs itcs itec ites itet itic itie itis itse itsi s-ib s-ic s-ii sbbs sbcc sbcs sbct sbic sbse sbsi sbst sbtc scbi sccc scce sccs scct scec scee scet sci- scic scie scis scit scsc scsi scst sctc scts se-c se-e se-i se-s se-t sebe sebi sebs sebt sec- secc sece secs sect seeb seec sees seet seie seii seis seit sesc sese sesi sess sest set- setc sete seti sets sett sibc sibe sibi sibs sicc sice sici sics siec sies siit sisc sise sisi siss sist sit- sitc site siti sits sitt sscc ssce ssci sscs ssec ssee sses sset ssis ssit sssb sssc sssi ssss sstb sstc ssts stbc stbs stcc stcs stec stee stes stet stib stic stie stis stit stsi stss sttc tbbs tbcb tbcc tbce tbit tbst tcbs tccc tctc tcts tecs tect teec tees teet teic teie teis tesc tese tess test tete teti tets tett tibi tibs ticc tice tics tie- tiee tiei ties tiet tiit tisb tise tisi tiss tist titc tite titi tits titt tsbc tscc tsec tses tset tsis tsse tssi tsst tstc tsts ttbb ttss tttt