cerne ecrne crene rcene ercne recne cenre ecnre cnere ncere encre necre crnee rcnee cnree ncree rncee nrcee ernce rence enrce nerce rnece nrece ceren ecren creen rceen ercen recen ceern ecern ceern ecern eecrn eecrn creen rceen ceren ecren recen ercen erecn reecn eercn eercn reecn erecn cener ecner cneer nceer encer necer ceenr ecenr ceenr ecenr eecnr eecnr cneer nceer cener ecner necer encer enecr neecr eencr eencr neecr enecr crnee rcnee cnree ncree rncee nrcee crene rcene cerne ecrne recne ercne cnere ncere cenre ecnre necre encre rnece nrece rence ernce nerce enrce ernec renec enrec nerec rneec nreec erenc reenc eernc eernc reenc erenc enerc neerc eenrc eenrc neerc enerc rneec nreec renec ernec nerec enrec
Note: these 'words' (valid or invalid) are all the permutations of the word cerne. These words are obtained by scrambling the letters in cerne.