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