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