In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['L', 6265, 'o', 'B', 9743, 9139, 't', '4107', '821', '9019', '5149', '7817', 'i', '787', 'G', 'b', 'g', 'g', 'j', '197', 'n', 'W', 'Z', '7081', '4487', '1439', '1117', 'K', 'O', '2241', 'J', 8701, 'U', 'q', 'r', 8487, 'G', 'N', 'z', 3439, 'I', 'a', 639], ['X', 7305, 'k', 4911, 1119, 'S', 'F', 8665, 3167, 1117, 6267, 4025, 'S', 'h', '4107', '821', '9019', '5149', '7817', 'i', '787', 'G', 'b', 'g', 'g', 'j', '197', 'n', 'W', 'Z', '7081', '4487', '1439', '1117', 'K', 'O', '2241', 'H', 7485, 5635]