dills idlls dlils ldils ildls lidls dills idlls dlils ldils ildls lidls dllis ldlis dllis ldlis lldis lldis illds lilds illds lilds llids llids dilsl idlsl dlisl ldisl ildsl lidsl disll idsll dsill sdill isdll sidll dlsil ldsil dslil sdlil lsdil sldil ilsdl lisdl isldl sildl lsidl slidl dilsl idlsl dlisl ldisl ildsl lidsl disll idsll dsill sdill isdll sidll dlsil ldsil dslil sdlil lsdil sldil ilsdl lisdl isldl sildl lsidl slidl dllsi ldlsi dllsi ldlsi lldsi lldsi dlsli ldsli dslli sdlli lsdli sldli dlsli ldsli dslli sdlli lsdli sldli llsdi llsdi lsldi slldi lsldi slldi illsd lilsd illsd lilsd llisd llisd ilsld lisld islld silld lsild slild ilsld lisld islld silld lsild slild llsid llsid lslid sllid lslid sllid
Note: these 'words' (valid or invalid) are all the permutations of the word dills. These words are obtained by scrambling the letters in dills.