bbbb bbch bbfc bbrc bcbc bccc bcfc bcof bcor bhcc bhff bhor bobb bobo boch bock boco boff bofh boho bohr boko boob booc boof booh book boor bor- borf borh bork boro borr brcb brfc brkb brob broc broh brok broo bror brrr c-bo cbbc cbcc cbcr cbfb cbfc cbko cbkr cbrh ccbc cccb cccc cccf ccfc ccff cchr ccob ccoc ccrc ccrf cfbc cfbr cfcb cfcf cfco cffb cffr cfhk cfor cfrb chch chfc chfr chkb choc choh chok choo chor chrb chrc chrf chro chrr ckbc ckch ckck ckco ckfr ckob ckoc ckoo ckor ckrc cobb cobh cobo coch cock coco cofc coff coho cok- coko coob coof cooh cook cor- corb corc corf cork coro corr crbc crcc crcr crfc crkc crob croc croh crok croo cror f--k fccf fcch ffcc ffff ffrr foch fock foco fofo fohr foof fook for- forb fork foro forr frbc frcc frfc frob froh hbfc hboc hcbc hccb hccc hcch hcfc hhhh hhof hkcc hobo hoch hock hocr hoff hoho hoko hoof hook hoor horc hork horo horr hrfc hrob hrrc kbbb kbbc kbbf kbbk kbbo kbbr kbcb kbch kbck kbco kbcr kbfb kbfc kbff kbfk kbfo kbfr kbhb kbhc kbhh kbhr kbkb kbkf kbkk kbko kbkr kbob kboc kbok kboo kbrb kbrc kbrf kbrh kbrk kbro kcbc kcbf kcbk kcbr kccb kccc kcck kccr kcfb kcfc kcfh kcfo kchf kchh kchk kcho kchr kckc kckf kckk kcko kckr kcob kcof kcoh kcor kcrc kcrh kcro kcrr kfbc kfbk kfcf kfch kfco kfcr kffb kfff kffk kfhc kfkb kfok kfoo kfor kfrc kfrh kfro kfrr khbc khbr khcb khcc khcf khch khck khfr khhk khho khkk khkr khob khoc khok khor khrk khro khrr kkbb kkbo kkbr kkcb kkch kkck kkco kkcr kkfr kkhb kkhh kkhk kkhr kkkk kkob kkoh kkoo kkor kkrb kkrc kkrf kkrh kkrk kkro kkrr kobb kobc kobk kobo kobr kocb kocf koch kock kofc koff kofh kofk kofo kohh koho kohr kokb kokc kokf kokh kokk koko kokr koob kooc kook kooo koor korb korc korf kork koro korr krbb krbk krbr krcb krcc krch krco krfc krff krfo krhc krkc krkh krkk krko krkr krob kroc krof kroh krok kroo kror krrb krrc krrf krrk krro krrr obbo obkb obok obor obrh obro ocbc occc ocro ocrr ofcr off- offc offh offo offr ofor ohcc ohho ohob ohoh ohok okko okok okor okro oocr ooff ooho oooh oooo orbb orbo orch orco orff orko oro- orof orok oror orro rbbb rbbr rboh rcbc rcbo rccb rccc rcfc rchb rffc rhob rhoc rhoh rkkf rob- robb robo rocc roch rock roco rofc roff rofo rohr rokh rokk roko rokr roob roof rook roor rorc rork roro rrfc rrrr