new_contents: """aoc_common
  
  Common utility functions for Advent of Code solutions
  """
  
  import pathlib
  
  
  def load_puzzle_input(day):
      """Return the puzzle input for the day’s puzzle"""
      input_directory = pathlib.Path(__file__).parent.with_name('input')
      year = input_directory.parent.name
      input_filename = f'{year}-{day:02}.txt'
      return input_directory.joinpath(input_filename).read_text()
  
subject: Add utility module to load puzzle input