bbbb bbci bbeb bblb bcbc bccc bcci bccl bcec bcie bebb bebe bebi bebo beci beeb beel beic beil bele beli bell belo beo- bibb bibe bibi bibl bibo bicc bice bici bico bieb biel bile bili bill bilo bio- bioc bioi biol bleb blee blei bleo blic blio blob bloc bloo bobb bobe bobi bobo boce boco boec boee boel boeo boi- boie boii boil bole boli boll bolo boob booc booe bool c-bo cbbc cbcc cbce cbcl cbec cbee cblb cblc cbol ccbc cccb cccc ccci cccl ccee ccel ccic ccii ccil cclc ccli ccob ccoc cec- cece ceci ceco ceeb ceec ceel ceil cel- celc cele celi cell celo ceol cibc cibe cibi cibo cicc cici cico ciee ciel ciii cili cill cilo ciob clec clee clei cleo clib clic clii clio clob cloe cloo cobb cobe cobi cobo coce coco coel coil col- colb cole coli coll colo coob cool e-cl ebbc ebbo ebcc ebel ebic ebli eboe ebol eboo ecbc ecbe eccb eccc ecce ecci eccl ecco ecib ecil eco- ecol eeee eele eeoc eico eiec eiei eile el-b elbe elbi elbo elcb elce elco elec elee eleo elic elie elil elio elle elli ello eloi eole eoli eolo i-be ibec ibie ible icbc iccb iccc icci iccl icco icec icee icel icle icll icoc iecc ieie ieio iele iiie iiii iiio iioi iioo ilbc ilce ile- ilec ileo ilic ilie ilio ill- ille illi illo iloc iloo iobi ioci ioee ioel ioii ioio iole iolo iooi iooo lbcc lcbc lccc lcce lebo lece leco leel leib leic leie leil leio lele leli lell lelo leoc leoi libc libe libo lice lico lieb liel liii lilb lile lili lill lilo lio- llcc lllc llll lloc lloo lob- lobb lobe lobi lobo locc loce loci loco loeb loei loic lole loli loll lolo loob looc looe lool o-eo obbo obec obel obie oble oboe oboi obol ocbc occc occi oce ocee oclc oec- oecc oeec oeil oele oici oiii olbo olcc ole- olei oleo olib olic olie olio olle olli ollo oobe oobi oolo oooo