bbbb bbdd bbdo bblb bcbc bccc bccl bcuc bdbc bddc blcu bldc blob bloc blod bloo blou blub blud bobb bobo bobu boco bocu bodb bodo bodu bold boll bolo bolu boob booc bood bool boud boul bubb bubo bubu bucc buco bucu budb budd budl budo budu bulb buld bull bulu buol c-bo c-cd cbbc cbcc cbcl cbcu cbdb cbdc cbdo cblb cblc cbol ccbc cccb cccc cccl cccu ccdc cclc ccob ccoc ccod ccuc cddb cddl clcd cldc clob clod cloo clou club clud cobb cobo cobu coco cocu codd codl col- colb cold coll colo colu coob cood cool coub coud coul cub- cubb cucc culb culc culd cull culo d-bo dbcc dcbc dccb dccc dccl dccu dcdb dddd ddlc ddoc ddub dlbd dlco dobb dobl dobu doco docu dod- dodd dodo dold doll dolo dolu doob dood dool doub douc doud doul dub- dubb dubc dubu duco dudd dudo dudu dulc dull dulo dulu duo- duul lbcc lcbc lccc lcdd llcc lldb lldc lllc llll lloc llod lloo llud lob- lobb lobo locc loco locu lold loll lolo loob looc lood lool loud loul louu ludd ludo lull lulu obbo oblu obol ocbc occc oclc ocul odbo oddd odoo odou olbo olcc oldb ollo oold oolo oooo oucc oudc ould oulu ouu- ubbo ublo uboc ubod ubud ucbc ucdc ucdd udbc udoo ulbc ulcc ulco ullo ulo- uloc ulul uocc uolc uulu uuoc uuuu