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