bbbb bblb bcbc bccc bccl blno blob bloc blon bloo bnoc bobb bobo boco boll boln bolo bonc bonn bono boob booc bool boon c-bo cbbc cbcc cbcl cbcn cblb cblc cbln cbol ccbc ccbn cccb cccc cccl cclc ccnb ccnc ccob ccoc clob clon cloo cnbc cnbl cnco cobb cobo coco col- colb coll coln colo con- conc conn cono coob cool coon lbcc lcbc lccc llcc lllc llll lloc lloo lob- lobb lobo locc locn loco loll lolo lono loob looc lool loon nbbc nbbo nbcc nbco ncbc nccc nccn nclc ncln ncnc ncoc nlcc nnnn nobc nobo nocl noco noll nolo non- nonn nono noo- noob nool noon nooo obbo obol obon ocbc occc occn oclc ocon olbo olcc ollo olon onc- onco onno onon oolo oooo