bbbb bbci bblb bcbc bccc bcci bccl bcuc bibb bibi bibl bibo bicc bici bico bili bill bilo bilu bio- bioc bioi biol biou blcu blic blio blob bloc bloo blou blub bobb bobi bobo bobu boco bocu boi- boii boil boiu boli boll bolo bolu boob booc bool boul bubb bubi bubo bubu bucc buci buco bucu buic buiu bulb buli bull bulu buol c-bo cbbc cbcc cbcl cbcu cblb cblc cbol ccbc cccb cccc ccci cccl cccu ccic ccii ccil cclc ccli ccob ccoc ccuc cibc cibi cibo cicc cici cico cicu ciii cili cill cilo ciob ciuc clib clic clii clio clob cloo clou club cobb cobi cobo cobu coco cocu coil col- colb coli coll colo colu coob cool coub coul cub- cubb cubi cucc cuci cui- cuil culb culc cull culo icbc iccb iccc icci iccl icco iccu icll icoc icub iiii iiio iioi iioo iiuc ilbc ilic ilio ill- illi illo iloc iloo iobi ioci ioii ioio iolo iooi iooo iucc iuiu lbcc lcbc lccc libc libo libu lico liii lilb lili lill lilo lilu lio- llcc lllc llll lloc lloo lob- lobb lobi lobo locc loci loco locu loic loiu loli loll lolo loob looc lool loui loul louu luci luli lull lulu obbo oblu oboi obol ocbc occc occi oclc ocul oici oiii olbo olcc olib olic olio olli ollo oobi oolo oooo oucc ouii oulu ouu- ubbi ubbo ubic ubii ubli ublo uboc ucbc ucci ucil ucio ulbc ulcc ulco ulic ulli ullo ulo- uloc ulul uocc uolc uulu uuoc uuuu