eiprs ieprs epirs peirs ipers piers eirps ierps erips reips ireps rieps epris peris erpis repis preis rpeis ipres pires irpes ripes pries rpies eipsr iepsr episr peisr ipesr piesr eispr iespr esipr seipr isepr siepr epsir pesir espir sepir pseir speir ipser piser isper siper psier spier eirsp iersp erisp reisp iresp riesp eisrp iesrp esirp seirp iserp sierp ersip resip esrip serip rseip sreip irsep risep isrep sirep rsiep sriep eprsi persi erpsi repsi presi rpesi epsri pesri espri sepri pseri speri erspi respi esrpi serpi rsepi srepi prsei rpsei psrei sprei rspei srpei iprse pirse irpse ripse prise rpise ipsre pisre ispre sipre psire spire irspe rispe isrpe sirpe rsipe sripe prsie rpsie psrie sprie rspie srpie
Note: these 'words' (valid or invalid) are all the permutations of the word eiprs. These words are obtained by scrambling the letters in eiprs.