erugs reugs eurgs uergs ruegs uregs ergus regus egrus gerus rgeus greus eugrs uegrs egurs geurs ugers guers ruges urges rgues grues ugres gures erusg reusg eursg uersg ruesg uresg ersug resug esrug serug rseug sreug eusrg uesrg esurg seurg userg suerg ruseg urseg rsueg srueg usreg sureg ergsu regsu egrsu gersu rgesu gresu ersgu resgu esrgu sergu rsegu sregu egsru gesru esgru segru gseru sgeru rgseu grseu rsgeu srgeu gsreu sgreu eugsr uegsr egusr geusr ugesr guesr eusgr uesgr esugr seugr usegr suegr egsur gesur esgur segur gseur sgeur ugser guser usger suger gsuer sguer rugse urgse rguse gruse ugrse gurse rusge ursge rsuge sruge usrge surge rgsue grsue rsgue srgue gsrue sgrue ugsre gusre usgre sugre gsure sgure
Note: these 'words' (valid or invalid) are all the permutations of the word erugs. These words are obtained by scrambling the letters in erugs.