ludos uldos lduos dluos udlos dulos luods ulods louds oluds uolds oulds ldous dlous lodus oldus dolus odlus udols duols uodls oudls douls oduls ludso uldso lduso dluso udlso dulso lusdo ulsdo lsudo sludo usldo suldo ldsuo dlsuo lsduo slduo dsluo sdluo udslo duslo usdlo sudlo dsulo sdulo luosd ulosd lousd olusd uolsd oulsd lusod ulsod lsuod sluod uslod sulod losud olsud lsoud sloud oslud solud uosld ousld usold suold osuld sould ldosu dlosu lodsu oldsu dolsu odlsu ldsou dlsou lsdou sldou dslou sdlou losdu olsdu lsodu slodu osldu soldu doslu odslu dsolu sdolu osdlu sodlu udosl duosl uodsl oudsl dousl odusl udsol dusol usdol sudol dsuol sduol uosdl ousdl usodl suodl osudl soudl dosul odsul dsoul sdoul osdul sodul
Note: these 'words' (valid or invalid) are all the permutations of the word ludos. These words are obtained by scrambling the letters in ludos.