input: Write a python function to search for URLs using the given keyword on the example.com site.
  assert 'https://www.example.com/result1' in search("test")
  assert 'https://www.example.com/result2' in search("example")
  assert 'https://www.example.com/result3' in search("search term")
output: def search(keyword):
      example_results = {
          "test": ["https://www.example.com/result1"],
          "example": ["https://www.example.com/result2"],
          "search term": ["https://www.example.com/result3"]
      }
      return example_results.get(keyword, [])