bbbb bbci bbeb bbet bblb bcbc bccc bcci bccl bcec bcet bcie bcit bctc bebb bebe bebi beci beeb beel beet beic beil beit bele beli bell belt betc bete beti bett bibb bibe bibi bibl bicc bice bici bieb biel biet bile bili bill bilt bitc bite bitt blbt bleb blee blei blet blic blit btcc btcl btec btie bttb cbbc cbcc cbce cbcl cbct cbec cbee cbet cbit cblb cblc cbtc cbtl ccbc cccb cccc ccci cccl ccee ccel ccic ccii ccil cclc ccli cctb cctc cctl cctt cec- cece ceci cect ceeb ceec ceel ceil cel- celc cele celi cell celt cet- cete ceti cibc cibe cibi cicc cici cict ciee ciel ciii ciit cili cill cilt citb cite citi citl citt clec clee clei clet clib clic clii clit cltb cltc ctbi ctec ctic ctle e-cl ebbc ebcc ebel ebic ebit ebli ecbc ecbe eccb eccc ecce ecci eccl ecct ecib ecil ecit eclt ect- ectc eeee eele eetc eete eiec eiei eile eitb eitc eiti el-b elbe elbi elcb elce elec elee elet elic elie elil elit elle elli elte etbc etcc etec etee etel etic ette etti i-be ibec ibet ibie ible ibtb ibtc ibtl icbc iccb iccc icci iccl icct icec icee icel icet icle icll iecc ieet ieie iele iett iiie iiii iiit iitt ilbc ilce ile- ilec ilet ilic ilie ilit ill- ille illi illt itbe itec itel itet itic itie itil itll lbcc lcbc lccc lcce lctl lece lect leel leet leib leic leie leil leit lele leli lell lete leti lett libc libe lice lict lieb liel liet liii lilb lile lili lill lilt litb lite liti litl litt llcc llet lllc llll ltbl ltcc ltci ltee ltib lttc tbcb tbcc tbce tbil tbit tccc tctc tecl tect teec teel teet teic teie teil tel- telc tele teli tell telt tete teti tett tibi ticc tice tie- tiee tiei tiel tiet tiit tile till tilt titc tite titi titt tlli ttbb tttt