dregs rdegs dergs edrgs redgs erdgs drges rdges dgres gdres rgdes grdes degrs edgrs dgers gders egdrs gedrs regds ergds rgeds greds egrds gerds dresg rdesg dersg edrsg redsg erdsg drseg rdseg dsreg sdreg rsdeg srdeg desrg edsrg dserg sderg esdrg sedrg resdg ersdg rsedg sredg esrdg serdg drgse rdgse dgrse gdrse rgdse grdse drsge rdsge dsrge sdrge rsdge srdge dgsre gdsre dsgre sdgre gsdre sgdre rgsde grsde rsgde srgde gsrde sgrde degsr edgsr dgesr gdesr egdsr gedsr desgr edsgr dsegr sdegr esdgr sedgr dgser gdser dsger sdger gsder sgder egsdr gesdr esgdr segdr gsedr sgedr regsd ergsd rgesd gresd egrsd gersd resgd ersgd rsegd sregd esrgd sergd rgsed grsed rsged srged gsred sgred egsrd gesrd esgrd segrd gserd sgerd
Note: these 'words' (valid or invalid) are all the permutations of the word dregs. These words are obtained by scrambling the letters in dregs.