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