battez

a = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89]
b = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]

def common_items(list_a, list_b):
  result = set()
  for item in list_a:
    if item in list_b:
      result.add(item)
  return list(result)