rudes urdes rdues drues udres dures rueds ureds reuds eruds uerds eurds rdeus dreus redus erdus derus edrus uders duers uedrs eudrs deurs edurs rudse urdse rduse druse udrse durse rusde ursde rsude srude usrde surde rdsue drsue rsdue srdue dsrue sdrue udsre dusre usdre sudre dsure sdure ruesd uresd reusd erusd uersd eursd rused ursed rsued srued usred sured resud ersud rseud sreud esrud serud uesrd eusrd userd suerd esurd seurd rdesu dresu redsu erdsu dersu edrsu rdseu drseu rsdeu srdeu dsreu sdreu resdu ersdu rsedu sredu esrdu serdu desru edsru dseru sderu esdru sedru udesr duesr uedsr eudsr deusr edusr udser duser usder suder dsuer sduer uesdr eusdr usedr suedr esudr seudr desur edsur dseur sdeur esdur sedur
Note: these 'words' (valid or invalid) are all the permutations of the word rudes. These words are obtained by scrambling the letters in rudes.