In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 6761, 1707, 2465, 'F', 4831, 'F', 5355, 1829, 8245, 4213, 6169, 'f', 9363, 'U', 'e', 7961, 'w', 'k', 'D', 7399, 'c', 'e', '5297', '6959', 'D', 'H', 'L', 'C', '6393', '1419', 'i', 't', 'Y', 'k', '3519', '7489', '7101', '7487', '9583', 'n', '4411', '7361', 'p', 5343, 'b', 'C', 8549, 'I', 'M', 'X', 6955, 69, 'x', 'I'], [899, 8501, 'Y', 'N', 2427, 8473, 9903, 3241, 'q', 'M', 'E', 'c', 'e', '5297', '6959', 'D', 'H', 'L', 'C', '6393', '1419', 'i', 't', 'Y', 'k', '3519', '7489', '7101', '7487', '9583', 'n', '4411', '7361', 'D', 'r', 'h', 'Y']