feres efres frees rfees erfes refes feers efers feers efers eefrs eefrs frees rfees feres efres refes erfes erefs reefs eerfs eerfs reefs erefs ferse efrse frese rfese erfse refse fesre efsre fsere sfere esfre sefre frsee rfsee fsree sfree rsfee srfee ersfe resfe esrfe serfe rsefe srefe feesr efesr feesr efesr eefsr eefsr feser efser fseer sfeer esfer sefer feser efser fseer sfeer esfer sefer eesfr eesfr esefr seefr esefr seefr frese rfese ferse efrse refse erfse frsee rfsee fsree sfree rsfee srfee fesre efsre fsere sfere esfre sefre resfe ersfe rsefe srefe esrfe serfe eresf reesf eersf eersf reesf eresf ersef resef esref seref rseef sreef eesrf eesrf eserf seerf eserf seerf resef ersef rseef sreef esref seref
Note: these 'words' (valid or invalid) are all the permutations of the word feres. These words are obtained by scrambling the letters in feres.