bbbb bbdd bbdo bblb bcbc bccc bccl bctc bcuc bdbc bddc blbt blcu bldc blob bloc blod bloo blot blou blub blud blut bobb bobo bobu boco bocu bodb bodo bodu bold boll bolo bolt bolu boob booc bood bool boot botb botd boto bott boud boul bout btcc btcl btdt btob bttb bubb bubo bubu bucc buco bucu budb budd budl budo budu bulb buld bull bult bulu buol but- buto butt c-bo c-cd cbbc cbcc cbcl cbct cbcu cbdb cbdc cbdo cblb cblc cbol cbot cbtc cbtl ccbc cccb cccc cccl cccu ccdc cclc ccob ccoc ccod cctb cctc cctl cctt ccuc ccut cddb cddl cdot clcd cldc clob clod cloo clot clou cltb cltc club clud clut cobb cobo cobu coco coct cocu codd codl col- colb cold coll colo colt colu coob cood cool coot cotb cotc coto cott cotu coub coud coul cout ctol ctot cub- cubb cucc culb culc culd cull culo cult cut- cutc cuto cutt d-bo dbcc dbtt dcbc dccb dccc dccl dcct dccu dcdb dctc dddd ddlc ddoc ddot ddub dlbd dlco dobb dobl dobu doco doct docu dod- dodd dodo dold doll dolo dolt dolu doob dood dool doot dotd doto dott doub douc doud doul dout dtcc dtot dub- dubb dubc dubu duco duct dudd dudo dudu dulc dull dulo dult dulu duo- duul duut lbcc lcbc lccc lcdd lctl lcto llcc lldb lldc lllc llll lloc llod lloo llud lob- lobb lobo locc loco locu lold loll lolo loob looc lood lool loot lotd lotl loto lott loud loul lout louu ltbl ltcc lttc ltuc ludd ludo lull lulu obbo obdt oblu obol obot obtd ocbc occc occt oclc oct- octo ocul odbo oddd odoo odot odou odtu olbo olcc oldb ollo olot oltu oold oolo oooo ootb otbd otcd otcl oto- otoo otto ottu oucc oudc ould oulu out- outb outo ouu- tbcb tbcc tbcd tccc tccu tcdd tctc tcul tddb tlco tobo tobt tobu toco todd todo todt todu tol- told toll tolo tolt tolu tood tool toot totc totd toto tott toul tout ttbb tttt ttul tubb tubo tubu tucc tuco tudu tull tulo tulu tutl tuto tutt tutu tuuo ubbo ublo uboc ubod ubud ucbc ucdc ucdd ucut udbc udoo udot ulbc ulcc ulco ullo ulo- uloc ulto ultt ulul uocc uolc utto uttu uulu uuoc uuuu