fifes iffes ffies ffies iffes fifes fiefs ifefs feifs efifs ieffs eiffs ffeis ffeis fefis effis fefis effis ifefs fiefs ieffs eiffs feifs efifs fifse iffse ffise ffise iffse fifse fisfe ifsfe fsife sfife isffe siffe ffsie ffsie fsfie sffie fsfie sffie ifsfe fisfe isffe siffe fsife sfife fiesf ifesf feisf efisf iefsf eifsf fisef ifsef fsief sfief isfef sifef fesif efsif fseif sfeif esfif sefif iesff eisff iseff sieff esiff seiff ffesi ffesi fefsi effsi fefsi effsi ffsei ffsei fsfei sffei fsfei sffei fesfi efsfi fsefi sfefi esffi seffi fesfi efsfi fsefi sfefi esffi seffi ifesf fiesf iefsf eifsf feisf efisf ifsef fisef isfef sifef fsief sfief iesff eisff iseff sieff esiff seiff fesif efsif fseif sfeif esfif sefif
Note: these 'words' (valid or invalid) are all the permutations of the word fifes. These words are obtained by scrambling the letters in fifes.