new_contents: # Write a program that finds all files with a given prefix, such as spam001.txt,
  # spam002.txt, and so on, in a single folder and locates any gaps in the numbering
  # (such as if there is a spam001.txt and spam003.txt but no spam002.txt).
  #
  # Have the program rename all the later files to close this gap.
  
subject: Initialize P03_fillGaps