bbbb bbdd bbdo bblb bcbc bccc bccl bcuc bdbc bddc blcu bldc blkb blkd blob bloc blod blok bloo blou blub blud bobb bobo bobu bock boco bocu bodb bodo bodu boko boku bold bolk boll bolo bolu boob booc bood book bool boud bouk boul bubb bubo bubu bucc buck buco bucu budb budd budl budo budu bukk buko buku bulb buld bulk bull bulu buol c-bo c-cd cbbc cbcc cbcl cbcu cbdb cbdc cbdo cbkl cbko cblb cblc cbol ccbc cccb cccc cccl cccu ccdc cclc ccob ccoc ccod ccuc cddb cddl ckbc ckck ckcl ckco ckdo ckdu ckob ckoc ckoo clcd cldc clob clod clok cloo clou club clud cobb cobo cobu cock coco cocu codd codl cok- coko col- colb cold colk coll colo colu coob cood cook cool coub coud couk coul cub- cubb cucc cuck cuk- culb culc culd culk cull culo d-bo dbcc dcbc dccb dccc dccl dccu dcdb dddd ddlc ddoc ddub dkdc dlbd dlco dobb dobl dobu dock doco docu dod- dodd dodo doko dold dolk doll dolo dolu doob dood dook dool doub douc doud douk doul dub- dubb dubc dubu duck duco dudd dudo dudu duku dulc dull dulo dulu duo- duul k-lo kbbb kbbc kbbd kbbk kbbl kbbo kbbu kbcb kbck kbcl kbco kbcu kbdb kbdl kbdo kbkb kbkk kbkl kbko kblb kbld kbll kblo kblu kbob kboc kbod kbok kboo kbub kbuc kbud kbuk kbul kbuu kcbc kcbd kcbk kcbl kcbu kccb kccc kccd kcck kccl kccu kcdc kcdd kcdu kckc kckk kckl kcko kclc kclk kcll kclu kcob kcol kcou kcub kcuk kcul kdbb kdbl kdcc kdcd kdco kddb kddc kddd kddk kddl kdkb kdkd kdkk kdko kdlb kdlc kdld kdll kdlo kdoc kdok kdub kduc kkbb kkbd kkbl kkbo kkcb kkcd kkck kkcl kkco kkdc kkdd kkdl kkdo kkkk kklb kklc kkld kkll kklo kkob kkol kkoo kkuu klbb klbc klbd klbl klbu klcb klcc klcd klck klcl kldc kldd klkc klkk klkl klko kllb kllc kllk klob kloc klok klol kloo klou klub kluk kluu kobb kobc kobk kobo kobu kocb kocd kock kodk kodl kodo kodu kokb kokc kokk koko koku kolb kolc kold kolk koll kolo kolu koob kooc kook kool kooo koou koub koul kouu kubb kubc kubd kubo kubu kucb kucc kucd kuco kudd kudl kudo kudu kukk kukl kuku kulb kuld kull kulo kulu kuok kuol kuoo kuub kuuk kuul kuuu lbcc lcbc lccc lcdd llcc lldb lldc lllc llll lloc llod lloo llud lob- lobb lobo locc lock loco locu lokk loko lold loll lolo loob looc lood look lool loud louk loul louu luck ludd ludo luko lull lulu luuk obbo obkb oblu obok obol ocbc occc oclc ocul odbo oddd odoo odou okcu okko oklo okok okol okul olbo olcc oldb ollo ooku oold oolo oooo oucc oudc ould oulk oulu ouu- ubbo ublo uboc ubod ubud ucbc ucdc ucdd udbc udoo uduk ukcc ukko ukok ulbc ulcc ulco ullo ulo- uloc uluk ulul uocc uolc uulu uuoc uuuu