input: Write a python function to print an element at a given index in a list.
  assert print_element([1, 2, 3, 4, 5], 2) == 3
  assert print_element(['a', 'b', 'c', 'd'], 1) == 'b'
  assert print_element([10, 20, 30, 40, 50], 4) == 50
output: def print_element(lst, index):
      return lst[index]