neirs enirs niers iners einrs ienrs neris enris nreis rneis ernis renis nires inres nries rnies irnes rines eirns ierns erins reins irens riens neisr enisr niesr inesr einsr iensr nesir ensir nseir sneir esnir senir niser inser nsier snier isner siner eisnr iesnr esinr seinr isenr sienr nersi enrsi nresi rnesi ernsi rensi nesri ensri nseri sneri esnri senri nrsei rnsei nsrei snrei rsnei srnei ersni resni esrni serni rseni sreni nirse inrse nrise rnise irnse rinse nisre insre nsire snire isnre sinre nrsie rnsie nsrie snrie rsnie srnie irsne risne isrne sirne rsine srine eirsn iersn erisn reisn iresn riesn eisrn iesrn esirn seirn isern siern ersin resin esrin serin rsein srein irsen risen isren siren rsien srien
Note: these 'words' (valid or invalid) are all the permutations of the word neirs. These words are obtained by scrambling the letters in neirs.