tiros itros trios rtios irtos ritos tiors itors toirs otirs iotrs oitrs trois rtois toris otris rotis ortis irots riots iorts oirts roits orits tirso itrso triso rtiso irtso ritso tisro itsro tsiro stiro istro sitro trsio rtsio tsrio strio rstio srtio irsto risto isrto sirto rsito srito tiosr itosr toisr otisr iotsr oitsr tisor itsor tsior stior istor sitor tosir otsir tsoir stoir ostir sotir iostr oistr isotr siotr ositr soitr trosi rtosi torsi otrsi rotsi ortsi trsoi rtsoi tsroi stroi rstoi srtoi tosri otsri tsori stori ostri sotri rosti orsti rsoti sroti osrti sorti irost riost iorst oirst roist orist irsot risot isrot sirot rsiot sriot iosrt oisrt isort siort osirt soirt rosit orsit rsoit sroit osrit sorit
Note: these 'words' (valid or invalid) are all the permutations of the word tiros. These words are obtained by scrambling the letters in tiros.