input: Write a python function to find the common elements between two lists.
  assert find_common_elements([1, 2, 3], [3, 4, 5]) == [3]
  assert find_common_elements([3, 4, 5], [5, 6, 7]) == [5]
  assert find_common_elements([1, 2, 3, 4, 5], [3, 4, 5, 6, 7]) == [3, 4, 5]
output: def find_common_elements(list1, list2):
      return list(set(list1) & set(list2))