cnbok ncbok cbnok bcnok nbcok bncok cnobk ncobk conbk ocnbk nocbk oncbk cbonk bconk cobnk ocbnk bocnk obcnk nbock bnock nobck onbck bonck obnck cnbko ncbko cbnko bcnko nbcko bncko cnkbo nckbo cknbo kcnbo nkcbo kncbo cbkno bckno ckbno kcbno bkcno kbcno nbkco bnkco nkbco knbco bknco kbnco cnokb ncokb conkb ocnkb nockb onckb cnkob nckob cknob kcnob nkcob kncob coknb ocknb ckonb kconb okcnb kocnb nokcb onkcb nkocb knocb okncb koncb cbokn bcokn cobkn ocbkn bockn obckn cbkon bckon ckbon kcbon bkcon kbcon cokbn ockbn ckobn kcobn okcbn kocbn bokcn obkcn bkocn kbocn okbcn kobcn nbokc bnokc nobkc onbkc bonkc obnkc nbkoc bnkoc nkboc knboc bknoc kbnoc nokbc onkbc nkobc knobc oknbc konbc boknc obknc bkonc kbonc okbnc kobnc
Note: these 'words' (valid or invalid) are all the permutations of the word cnbok. These words are obtained by scrambling the letters in cnbok.