input: Write a function to find the common elements between two given lists. Return a list containing the common elements. If there are no common elements, return an empty list. 
  
  assert find_common_elements([1, 2, 3], [2, 3, 4]) == [2, 3]
  assert find_common_elements([5, 6, 7], [8, 9, 0]) == []
  assert find_common_elements([], [1, 2, 3]) == []
  assert find_common_elements([1, 1, 1], [1, 1, 1]) == [1, 1, 1]
  assert find_common_elements([1, 2, 3], []) == []
output: def find_common_elements(list1, list2):
      return [item for item in list1 if item in list2]