bbbb bbfc bbrc bcbc bccc bcfc bcof bcor bcru bcuc bobb bobo bobu bock boco bocu boff bofu boko boku boob booc boof book boor bor- borf bork boro borr boru bouf bouk bour brcb brfc brfu brkb brob broc brok broo bror brou brrr bruc bubb bubo bubu bucc buck buco bucu bufc buff bufo bufr bukk buko buku bur- burb burk buro burr buru c-bo cbbc cbcc cbcr cbcu cbfb cbfc cbko cbkr ccbc cccb cccc cccf cccu ccfc ccff ccob ccoc ccrc ccrf ccuc cfbc cfbr cfcb cfcf cfco cffb cffr cfor cfrb ckbc ckck ckco ckfr ckob ckoc ckoo ckor ckrc cobb cobo cobu cock coco cocu cofc coff cok- coko coob coof cook cor- corb corc corf cork coro corr coub couk cour crbc crbu crcc crcr crfc crkc crob croc crok croo cror crub cruk cub- cubb cucc cuck cufc cuff cufo cuk- curb curf curo curr f--k fccf fcuk ffcc ffff ffrr fock foco fofo foof fook for- forb fork foro forr four frbc frcc frfc frob frou frub fubb fubu fuc- fuck fufc fuff fufu fukk fuko fuku fuor fur- furo furr kbbb kbbc kbbf kbbk kbbo kbbr kbbu kbcb kbck kbco kbcr kbcu kbfb kbfc kbff kbfk kbfo kbfr kbkb kbkf kbkk kbko kbkr kbob kboc kbok kboo kbrb kbrc kbrf kbrk kbro kbru kbub kbuc kbuf kbuk kbur kbuu kcbc kcbf kcbk kcbr kcbu kccb kccc kcck kccr kccu kcfb kcfc kcfo kckc kckf kckk kcko kckr kcob kcof kcor kcou kcrc kcro kcrr kcru kcub kcuf kcuk kfbc kfbk kfcf kfco kfcr kffb kfff kffk kfkb kfok kfoo kfor kfrc kfro kfrr kfru kfuo kkbb kkbo kkbr kkcb kkck kkco kkcr kkfr kkkk kkob kkoo kkor kkrb kkrc kkrf kkrk kkro kkrr kkuu kobb kobc kobk kobo kobr kobu kocb kocf kock kofc koff kofk kofo kofu kokb kokc kokf kokk koko kokr koku koob kooc kook kooo koor koou korb korc korf kork koro korr koru koub kour kouu krbb krbk krbr krcb krcc krco krcu krfc krff krfo krkc krkk krko krkr krku krob kroc krof krok kroo kror krrb krrc krrf krrk krro krrr kruc kruf kruk krur kubb kubc kubo kubr kubu kucb kucc kuco kucr kufc kuff kufo kufr kukk kuku kuok kuoo kurb kurk kuro kurr kuru kuub kuuk kuur kuuu obbo obkb obok obor obro ocbc occc ocro ocrr ocur ofcr off- offc offo offr offu ofor okcu okko okok okor okro okur oocr ooff ooku oooo orbb orbo orbu orco orff orfu orko oro- orof orok oror orro orub oucc oufc ouff our- ouro ouu- rbbb rbbr rcbc rcbo rccb rccc rcfc rffc rkkf rob- robb robo robu rocc rock roco rofc roff rofo rokk roko rokr roku roob roof rook roor rorc rork roro roru roub rouf rouk rrfc rrrr rubb rubu ruck rufc ruff rufo rukk ruku ruok rurc ruro ruru ubbo uboc ucbc ucfb ucrc ufcu ufuk ukcc ukko ukok ukrc ukur uocc uofo uor- urff uro- urok uroo uruk urur uuoc uuuu