mnirs nmirs minrs imnrs nimrs inmrs mnris nmris mrnis rmnis nrmis rnmis mirns imrns mrins rmins irmns rimns nirms inrms nrims rnims irnms rinms mnisr nmisr minsr imnsr nimsr inmsr mnsir nmsir msnir smnir nsmir snmir misnr imsnr msinr sminr ismnr simnr nismr insmr nsimr snimr isnmr sinmr mnrsi nmrsi mrnsi rmnsi nrmsi rnmsi mnsri nmsri msnri smnri nsmri snmri mrsni rmsni msrni smrni rsmni srmni nrsmi rnsmi nsrmi snrmi rsnmi srnmi mirsn imrsn mrisn rmisn irmsn rimsn misrn imsrn msirn smirn ismrn simrn mrsin rmsin msrin smrin rsmin srmin irsmn rismn isrmn sirmn rsimn srimn nirsm inrsm nrism rnism irnsm rinsm nisrm insrm nsirm snirm isnrm sinrm nrsim rnsim nsrim snrim rsnim srnim irsnm risnm isrnm sirnm rsinm srinm
Note: these 'words' (valid or invalid) are all the permutations of the word mnirs. These words are obtained by scrambling the letters in mnirs.