vrils rvils virls ivrls rivls irvls vrlis rvlis vlris lvris rlvis lrvis vilrs ivlrs vlirs lvirs ilvrs livrs rilvs irlvs rlivs lrivs ilrvs lirvs vrisl rvisl virsl ivrsl rivsl irvsl vrsil rvsil vsril svril rsvil srvil visrl ivsrl vsirl svirl isvrl sivrl risvl irsvl rsivl srivl isrvl sirvl vrlsi rvlsi vlrsi lvrsi rlvsi lrvsi vrsli rvsli vsrli svrli rsvli srvli vlsri lvsri vslri svlri lsvri slvri rlsvi lrsvi rslvi srlvi lsrvi slrvi vilsr ivlsr vlisr lvisr ilvsr livsr vislr ivslr vsilr svilr isvlr sivlr vlsir lvsir vslir svlir lsvir slvir ilsvr lisvr islvr silvr lsivr slivr rilsv irlsv rlisv lrisv ilrsv lirsv rislv irslv rsilv srilv isrlv sirlv rlsiv lrsiv rsliv srliv lsriv slriv ilsrv lisrv islrv silrv lsirv slirv
Note: these 'words' (valid or invalid) are all the permutations of the word vrils. These words are obtained by scrambling the letters in vrils.