cobbs ocbbs cbobs bcobs obcbs bocbs cobbs ocbbs cbobs bcobs obcbs bocbs cbbos bcbos cbbos bcbos bbcos bbcos obbcs bobcs obbcs bobcs bbocs bbocs cobsb ocbsb cbosb bcosb obcsb bocsb cosbb ocsbb csobb scobb oscbb socbb cbsob bcsob csbob scbob bscob sbcob obscb boscb osbcb sobcb bsocb sbocb cobsb ocbsb cbosb bcosb obcsb bocsb cosbb ocsbb csobb scobb oscbb socbb cbsob bcsob csbob scbob bscob sbcob obscb boscb osbcb sobcb bsocb sbocb cbbso bcbso cbbso bcbso bbcso bbcso cbsbo bcsbo csbbo scbbo bscbo sbcbo cbsbo bcsbo csbbo scbbo bscbo sbcbo bbsco bbsco bsbco sbbco bsbco sbbco obbsc bobsc obbsc bobsc bbosc bbosc obsbc bosbc osbbc sobbc bsobc sbobc obsbc bosbc osbbc sobbc bsobc sbobc bbsoc bbsoc bsboc sbboc bsboc sbboc
Note: these 'words' (valid or invalid) are all the permutations of the word cobbs. These words are obtained by scrambling the letters in cobbs.