input: Write a function to convert a list into a dictionary where each element of the list becomes the key and its corresponding value is a string representation of the key. The function should then print the values of the dictionary. If the list is empty, the function should print an empty string.
  assert convert_list_to_dict([1, 2, 3, 4])==None
  assert convert_list_to_dict(["a", "b", "c"])==None
  assert convert_list_to_dict([])==None
  assert convert_list_to_dict([5])==None
  assert convert_list_to_dict([10, 20, 30, 40, 50])==None
output: def convert_list_to_dict(lst):
      if not lst:
          print("")
      else:
          d = {key: str(key) for key in lst}
          print(" ".join(d.values()))