urvas ruvas uvras vuras rvuas vruas uravs ruavs uarvs aurvs rauvs aruvs uvars vuars uavrs auvrs vaurs avurs rvaus vraus ravus arvus varus avrus urvsa ruvsa uvrsa vursa rvusa vrusa ursva rusva usrva surva rsuva sruva uvsra vusra usvra suvra vsura svura rvsua vrsua rsvua srvua vsrua svrua urasv ruasv uarsv aursv rausv arusv ursav rusav usrav surav rsuav sruav uasrv ausrv usarv suarv asurv saurv rasuv arsuv rsauv srauv asruv saruv uvasr vuasr uavsr auvsr vausr avusr uvsar vusar usvar suvar vsuar svuar uasvr ausvr usavr suavr asuvr sauvr vasur avsur vsaur svaur asvur savur rvasu vrasu ravsu arvsu varsu avrsu rvsau vrsau rsvau srvau vsrau svrau rasvu arsvu rsavu sravu asrvu sarvu vasru avsru vsaru svaru asvru savru
Note: these 'words' (valid or invalid) are all the permutations of the word urvas. These words are obtained by scrambling the letters in urvas.