In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['b', 9435, 'W', 'v', 't', 'o', 'W', '3897', 'q', '7203', '1015', '6015', 'p', '9809', 'I', 'i', 241, 'M', 'K', 'M', 693, 741, 1771, 9553], ['T', 'C', 7101, 'W', 'v', 't', 'o', 'W', '3897', 'q', '7203', '1015', '6015', 'p', '9809', 'I', 'r', 9909, 1603, 'C', 'C', 2959]