input: Write a function to sort a list of strings alphabetically. If the list is empty, return an empty list.
  
  def sort_strings_alphabetically(strings):
      if not strings:
          return []
      strings.sort()
      return strings
  
  assert sort_strings_alphabetically(["Hello", "Yes", "No", "World"]) == ["Hello", "No", "World", "Yes"]
  assert sort_strings_alphabetically([]) == []
output: def sort_strings_alphabetically(strings):
      if not strings:
          return []
      strings.sort()
      return strings