bbbb bbeb bblb bbrc bcbc bccc bccl bcec bcer bebb bebe beeb beel beer bele bell berc bere berr bleb blee blrc brcb brce breb brec bree brel brer brrr cbbc cbcc cbce cbcl cbcr cbec cbee cber cblb cblc cbre cbrl ccbc cccb cccc cccl ccee ccel cclc ccrc ccre ccrl cec- cece ceeb ceec ceel cel- celc cele cell cer- cerc cere cerl clec clee cler crbc crcc crce crcr cre- creb crec cree e-cl ebbc ebbr ebcc ebel eber ecbc ecbe eccb eccc ecce eccl ecrc ecrl ecrr eeee eele eerc el-b elbe elcb elce elec elee eler elle erbb erbe ercc erce ereb erec erel erer erle erll errc erre lbcc lblr lcbc lccc lcce lcer lcrl lece leel leer lele lell lerc lere llcc lllc llll lrrc lrrr rbbb rbbr rbcl rble rcbc rccb rccc rcle rebb rebe recc rece recr reeb reel relb rele rell rere rlee rrle rrrr