bbbb bblb bcbc bccc bccl bcnu bcuc blcu blno blob bloc blon bloo blou blub bnoc bobb bobo bobu boco bocu boll boln bolo bolu bonc bonn bono bonu boob booc bool boon boul boun bubb bubo bubu bucc buco bucu bulb bull bulu bunb bunn buno bunu buol buon c-bo cbbc cbcc cbcl cbcn cbcu cblb cblc cbln cbol ccbc ccbn cccb cccc cccl cccu cclc ccnb ccnc ccnu ccob ccoc ccuc clob clon cloo clou club clun cnbc cnbl cnco cobb cobo cobu coco cocu col- colb coll coln colo colu con- conc conn cono coob cool coon coub coul coun cub- cubb cucc cucn culb culc cull culo cuno cuon lbcc lcbc lccc llcc lllc llll lloc lloo lob- lobb lobo locc locn loco locu loll lolo lono loob looc lool loon loul loun louu lull lulu lunn luno nbbc nbbo nbcc nbco ncbc nccc nccn nccu nclc ncln ncnc ncoc nlcc nnnn nobc nobo nobu nocl noco noll nolo non- nonn nono nonu noo- noob nool noon nooo noul noun nubc nubl nucu null nunc nunn nuno nuoc nuon obbo oblu obol obon ocbc occc occn oclc ocon ocul olbo olcc ollo olon onc- onco onno onon oolo oooo oucc oulu oun- ouu- ubbo ublo uboc ubon ucbc ucon ulbc ulcc ulco ullo ulno ulo- uloc ulul uncc uncl unco unno unon uocc uolc uulu uuno uuoc uuuu