bbbb bbeb bbfc bblb bcbc bccc bccl bcec bcfc bcuc bebb bebe becu beeb beef beel befe beff bele bell belu bffl blcu bleb blee bleu blfc blub blue bluf bubb bube bubu bucc buce bucu buel bueu bufc bufe buff bulb bule bull bulu cbbc cbcc cbce cbcl cbcu cbec cbee cbef cbfb cbfc cblb cblc ccbc cccb cccc cccf cccl cccu ccee ccel ccfc ccff ccfl cclc ccuc cebu cec- cece ceeb ceec ceel cef- cefc cel- celc cele celf cell cfbc cfcb cfcf cfcl cffb clec clee clef cleu club clue cub- cubb cube cucc cuce cufc cuff culb culc cule cull e-cl ebbc ebcc ebel ebfc ebul ecbc ecbe eccb eccc ecce eccl ecef ecfc eeee eefe eefl eele el-b elbe elbu elcb elce elec elee elef elfc elfe elle ellu elue elul eubc eufc eule fble fccf fece feeb feel fefc fefe feff fele felf fell ffcc ffee ffff flcl flee flub flue fluf fubb fubu fuc- fuel fufc fuff fufu fule full fulu lbcc lcbc lccc lcce lcfc le-u lebu lece leef leel lefe leff lele lell lelu leuc lfcc llcc llef lleu lllc llll lube luce luef lufe luff lufu lule lull lulu ubbe uble ucbc ucel ucfb uele uell ufcu ufel uffe ulbc ulcc uleb ulee ulfe ulle ulul uulu uuuu