cboks bcoks cobks ocbks bocks obcks cbkos bckos ckbos kcbos bkcos kbcos cokbs ockbs ckobs kcobs okcbs kocbs bokcs obkcs bkocs kbocs okbcs kobcs cbosk bcosk cobsk ocbsk bocsk obcsk cbsok bcsok csbok scbok bscok sbcok cosbk ocsbk csobk scobk oscbk socbk bosck obsck bsock sbock osbck sobck cbkso bckso ckbso kcbso bkcso kbcso cbsko bcsko csbko scbko bscko sbcko cksbo kcsbo cskbo sckbo kscbo skcbo bksco kbsco bskco sbkco ksbco skbco coksb ocksb ckosb kcosb okcsb kocsb coskb ocskb csokb scokb osckb sockb cksob kcsob cskob sckob kscob skcob okscb koscb oskcb sokcb ksocb skocb boksc obksc bkosc kbosc okbsc kobsc boskc obskc bsokc sbokc osbkc sobkc bksoc kbsoc bskoc sbkoc ksboc skboc oksbc kosbc oskbc sokbc ksobc skobc
Note: these 'words' (valid or invalid) are all the permutations of the word cboks. These words are obtained by scrambling the letters in cboks.