dells edlls dlels ldels eldls ledls dells edlls dlels ldels eldls ledls dlles ldles dlles ldles lldes lldes ellds lelds ellds lelds lleds lleds delsl edlsl dlesl ldesl eldsl ledsl desll edsll dsell sdell esdll sedll dlsel ldsel dslel sdlel lsdel sldel elsdl lesdl esldl seldl lsedl sledl delsl edlsl dlesl ldesl eldsl ledsl desll edsll dsell sdell esdll sedll dlsel ldsel dslel sdlel lsdel sldel elsdl lesdl esldl seldl lsedl sledl dllse ldlse dllse ldlse lldse lldse dlsle ldsle dslle sdlle lsdle sldle dlsle ldsle dslle sdlle lsdle sldle llsde llsde lslde sllde lslde sllde ellsd lelsd ellsd lelsd llesd llesd elsld lesld eslld selld lseld sleld elsld lesld eslld selld lseld sleld llsed llsed lsled slled lsled slled
Note: these 'words' (valid or invalid) are all the permutations of the word dells. These words are obtained by scrambling the letters in dells.