input: Write a python function to print even numbers from a list.
  assert print_even([1, 4, 5, 8, 9, 11])==[4, 8]
  assert print_even([2, 3, 6, 7, 10, 13, 14])==[2, 6, 10, 14]
  assert print_even([12, 15, 17, 20, 22, 24])==[12, 20, 22, 24]
output: def print_even(numbers):
      return [num for num in numbers if num % 2 == 0]