input: Write a python function to parse a JSON string and print its contents in the format "key = value".
  assert parse_and_print_json('{"FirstName": "John", "LastName": "Smith"}') == 'FirstName = John\nLastName = Smith\n'
  assert parse_and_print_json('{"Name": "Alice", "Age": 30}') == 'Name = Alice\nAge = 30\n'
  assert parse_and_print_json('{"City": "New York", "Country": "USA"}') == 'City = New York\nCountry = USA\n'
output: def parse_and_print_json(json_string):
      import json
      data = json.loads(json_string)
      result = ""
      for key, value in data.items():
          result += f"{key} = {value}\n"
      return result