input: Write a python function to sort a list in ascending order.
  assert sort_asc([4, 2, 9, 1, 5, 6]) == [1, 2, 4, 5, 6, 9]
  assert sort_asc([10, -1, 0, 5, 3, 2]) == [-1, 0, 2, 3, 5, 10]
  assert sort_asc([3, 3, 3, 3]) == [3, 3, 3, 3]
output: def sort_asc(lst):
      return sorted(lst)