input: Write a python function to filter even numbers from a list.
  assert filter_evennumbers([1, 6, 3, 2, 8, 7, 0, 4, 9, 11, 22, 18, 33, 28, 26, 55, 49, 37, 63, 59]) == [6, 2, 8, 0, 4, 22, 18, 28, 26]
  assert filter_evennumbers([10, 21, 32, 43, 54, 65]) == [10, 32, 54]
  assert filter_evennumbers([5, 7, 9, 8, 6, 4, 3]) == [8, 6, 4]
output: def filter_evennumbers(lst):
      return [num for num in lst if num % 2 == 0]