title: space-separated string of all positive numbers that are divisible by 2.For example, even_numbers(6) returns “2 4 6”
body: <pre><code>def even_numbers(maximum):
      return_string = ""
      for x in ___:
          return_string += str(x) + " "
      return return_string.strip()
  print(even_numbers(1))  # No numbers displayed
  </code></pre>