input: Write a function to sort a list of integers.
  assert sort_list([4, 2, 9, 1, 5, 6]) == [1, 2, 4, 5, 6, 9]
  assert sort_list([10, 7, 3, 8, 2]) == [2, 3, 7, 8, 10]
  assert sort_list([30, 20, 40, 10]) == [10, 20, 30, 40]
output: def sort_list(lst):
      return sorted(lst)