input: 
  import random
  
  def shuffle_list(list): 
      """ Shuffle a given list and return the shuffled list.
      >>> shuffle_list([1, 2, 3, 4, 5])
      [3, 1, 5, 4, 2]  # Example output, actual output may vary
      >>> shuffle_list(['a', 'b', 'c', 'd'])
      ['d', 'b', 'a', 'c']  # Example output, actual output may vary
      """
      # Initialize the random number generator
      random.seed()
  
      # Shuffle the list
      random.shuffle(list) 
  
      # Return the list
      return list
  
output:     # Initialize the random number generator
      random.seed()
  
      # Shuffle the list
      random.shuffle(list) 
  
      # Return the list
      return list