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