aluff lauff aulff ualff luaff ulaff alfuf lafuf afluf faluf lfauf flauf auflf uaflf afulf faulf ufalf fualf lufaf ulfaf lfuaf fluaf uflaf fulaf aluff lauff aulff ualff luaff ulaff alfuf lafuf afluf faluf lfauf flauf auflf uaflf afulf faulf ufalf fualf lufaf ulfaf lfuaf fluaf uflaf fulaf alffu laffu aflfu falfu lfafu flafu alffu laffu aflfu falfu lfafu flafu afflu faflu afflu faflu ffalu ffalu lffau flfau lffau flfau fflau fflau auffl uaffl afufl faufl ufafl fuafl auffl uaffl afufl faufl ufafl fuafl afful faful afful faful ffaul ffaul uffal fufal uffal fufal ffual ffual luffa ulffa lfufa flufa uflfa fulfa luffa ulffa lfufa flufa uflfa fulfa lffua flfua lffua flfua fflua fflua uffla fufla uffla fufla ffula ffula
Note: these 'words' (valid or invalid) are all the permutations of the word aluff. These words are obtained by scrambling the letters in aluff.