input: Write a python function to filter elements in a list based on a given criteria using eval function.
  assert filter_list([1, 4, 5, 6, 7, 14, 15], "item > 5") == [6, 7, 14, 15]
  assert filter_list([10, 20, 30, 40], "item <= 20") == [10, 20]
  assert filter_list([3, 6, 9, 12], "item % 3 == 0") == [3, 6, 9, 12]
output: def filter_list(lst, criteria):
      return [item for item in lst if eval(criteria)]