safft asfft sfaft fsaft afsft fasft safft asfft sfaft fsaft afsft fasft sffat fsfat sffat fsfat ffsat ffsat affst fafst affst fafst ffast ffast saftf asftf sfatf fsatf afstf fastf satff astff staff tsaff atsff tasff sftaf fstaf stfaf tsfaf ftsaf tfsaf aftsf fatsf atfsf tafsf ftasf tfasf saftf asftf sfatf fsatf afstf fastf satff astff staff tsaff atsff tasff sftaf fstaf stfaf tsfaf ftsaf tfsaf aftsf fatsf atfsf tafsf ftasf tfasf sffta fsfta sffta fsfta ffsta ffsta sftfa fstfa stffa tsffa ftsfa tfsfa sftfa fstfa stffa tsffa ftsfa tfsfa fftsa fftsa ftfsa tffsa ftfsa tffsa affts fafts affts fafts ffats ffats aftfs fatfs atffs taffs ftafs tfafs aftfs fatfs atffs taffs ftafs tfafs fftas fftas ftfas tffas ftfas tffas
Note: these 'words' (valid or invalid) are all the permutations of the word safft. These words are obtained by scrambling the letters in safft.