In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['V', 'L', '7869', '225', '9243', '6393', '2543', 'Z', 'y', 'H', '203', '6931', 'i', 'K', 'x'], [7667, 3705, 5401, 'y', 2039, '7869', '225', '9243', '6393', '2543', 'Z', 'y', 'H', '203', '6931', 'U', 'o', 7111, 'g', 9057, 7551, 9995]