input: Write a function to find the common elements between two given lists. The function should take two lists as input and return a new list containing the common elements between both lists.
  assert find_common_elements([1, 2, 3], [2, 3, 4]) == [2, 3]
  assert find_common_elements([], [2, 3, 4]) == []
  assert find_common_elements([1, 2, 3], []) == []
  assert find_common_elements([1, 2, 3], [4, 5, 6]) == []
  assert find_common_elements([1, 1, 2], [1, 2, 2]) == [1, 2]
output: def find_common_elements(list1, list2):
      return list(set(list1) & set(list2))