def even_numbers(maximum):
	"""The even_numbers function returns a space-separated string of all positive
	numbers that are divisible by 2, up to and including the maximum that's passed
	into the function. For example, even_numbers(6) returns “2 4 6”."""
	return_string = ""
	for x in range(2, maximum + 1, 2):
		return_string += str(x) + " "
	return return_string.strip()