input: Write a python function to insert an element at the third position in a list.
  assert insert_element(2, [1, 3, 4]) == [1, 3, 2, 4]
  assert insert_element('a', ['x', 'y', 'z']) == ['x', 'y', 'a', 'z']
  assert insert_element(99, [100, 200, 300, 400]) == [100, 200, 99, 300, 400]
output: def insert_element(element, lst):
      lst.insert(2, element)
      return lst