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