bbbb bbci bbeb bblb bcbc bccc bcci bccl bcec bcie bebb bebe bebi beci beeb beel beic beil bele beli bell bibb bibe bibi bibl bicc bice bici bieb biel bile bili bill bleb blee blei blic cbbc cbcc cbce cbcl cbec cbee cblb cblc ccbc cccb cccc ccci cccl ccee ccel ccic ccii ccil cclc ccli cec- cece ceci ceeb ceec ceel ceil cel- celc cele celi cell cibc cibe cibi cicc cici ciee ciel ciii cili cill clec clee clei clib clic clii e-cl ebbc ebcc ebel ebic ebli ecbc ecbe eccb eccc ecce ecci eccl ecib ecil eeee eele eiec eiei eile el-b elbe elbi elcb elce elec elee elic elie elil elle elli i-be ibec ibie ible icbc iccb iccc icci iccl icec icee icel icle icll iecc ieie iele iiie iiii ilbc ilce ile- ilec ilic ilie ill- ille illi lbcc lcbc lccc lcce lece leel leib leic leie leil lele leli lell libc libe lice lieb liel liii lilb lile lili lill llcc lllc llll