nepis enpis npeis pneis epnis penis neips enips nieps ineps einps ienps npies pnies nipes inpes pines ipnes epins peins eipns iepns piens ipens nepsi enpsi npesi pnesi epnsi pensi nespi enspi nsepi snepi esnpi senpi npsei pnsei nspei snpei psnei spnei epsni pesni espni sepni pseni speni neisp enisp niesp inesp einsp iensp nesip ensip nseip sneip esnip senip nisep insep nsiep sniep isnep sinep eisnp iesnp esinp seinp isenp sienp npise pnise nipse inpse pinse ipnse npsie pnsie nspie snpie psnie spnie nispe inspe nsipe snipe isnpe sinpe pisne ipsne psine spine ispne sipne episn peisn eipsn iepsn piesn ipesn epsin pesin espin sepin psein spein eispn iespn esipn seipn isepn siepn pisen ipsen psien spien ispen sipen
Note: these 'words' (valid or invalid) are all the permutations of the word nepis. These words are obtained by scrambling the letters in nepis.