input: Write a python function to find common elements between two lists.
  assert find_common_elements([1, 2, 3, 4], [3, 4, 5, 6]) == [3, 4]
  assert find_common_elements([7, 8, 9], [9, 10, 11]) == [9]
  assert find_common_elements([12, 14, 16], [13, 14, 15]) == [14]
output: def find_common_elements(list1, list2):
      return [element for element in list1 if element in list2]