deils edils diels idels eidls iedls delis edlis dleis ldeis eldis ledis diles idles dlies ldies ildes lides eilds ields elids leids ileds lieds deisl edisl diesl idesl eidsl iedsl desil edsil dseil sdeil esdil sedil disel idsel dsiel sdiel isdel sidel eisdl iesdl esidl seidl isedl siedl delsi edlsi dlesi ldesi eldsi ledsi desli edsli dseli sdeli esdli sedli dlsei ldsei dslei sdlei lsdei sldei elsdi lesdi esldi seldi lsedi sledi dilse idlse dlise ldise ildse lidse disle idsle dsile sdile isdle sidle dlsie ldsie dslie sdlie lsdie sldie ilsde lisde islde silde lside slide eilsd ielsd elisd leisd ilesd liesd eisld iesld esild seild iseld sield elsid lesid eslid selid lseid sleid ilsed lised isled siled lsied slied
Note: these 'words' (valid or invalid) are all the permutations of the word deils. These words are obtained by scrambling the letters in deils.