bbbb bbeb bblb bcbc bccc bccl bcec bebb bebe bebo beeb beel bele bell belo beo- bleb blee bleo blob bloc bloo bobb bobe bobo boce boco boec boee boel boeo bole boll bolo boob booc booe bool c-bo cbbc cbcc cbce cbcl cbec cbee cblb cblc cbol ccbc cccb cccc cccl ccee ccel cclc ccob ccoc cec- cece ceco ceeb ceec ceel cel- celc cele cell celo ceol clec clee cleo clob cloe cloo cobb cobe cobo coce coco coel col- colb cole coll colo coob cool e-cl ebbc ebbo ebcc ebel eboe ebol eboo ecbc ecbe eccb eccc ecce eccl ecco eco- ecol eeee eele eeoc el-b elbe elbo elcb elce elco elec elee eleo elle ello eole eolo lbcc lcbc lccc lcce lebo lece leco leel lele lell lelo leoc llcc lllc llll lloc lloo lob- lobb lobe lobo locc loce loco loeb lole loll lolo loob looc looe lool o-eo obbo obec obel oble oboe obol ocbc occc oce ocee oclc oec- oecc oeec oele olbo olcc ole- oleo olle ollo oobe oolo oooo