snirt nsirt sinrt isnrt nisrt insrt snrit nsrit srnit rsnit nrsit rnsit sirnt isrnt srint rsint irsnt risnt nirst inrst nrist rnist irnst rinst snitr nsitr sintr isntr nistr instr sntir nstir stnir tsnir ntsir tnsir sitnr istnr stinr tsinr itsnr tisnr nitsr intsr ntisr tnisr itnsr tinsr snrti nsrti srnti rsnti nrsti rnsti sntri nstri stnri tsnri ntsri tnsri srtni rstni strni tsrni rtsni trsni nrtsi rntsi ntrsi tnrsi rtnsi trnsi sirtn isrtn sritn rsitn irstn ristn sitrn istrn stirn tsirn itsrn tisrn srtin rstin strin tsrin rtsin trsin irtsn ritsn itrsn tirsn rtisn trisn nirts inrts nrits rnits irnts rints nitrs intrs ntirs tnirs itnrs tinrs nrtis rntis ntris tnris rtnis trnis irtns ritns itrns tirns rtins trins
Note: these 'words' (valid or invalid) are all the permutations of the word snirt. These words are obtained by scrambling the letters in snirt.