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