In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[629, 2569, 'l', 'f', 7091, 2805, 'z', '9091', 'I', 'Z', 'p', '7257', '2779', 'o', 'h', 'c', 'q', 'g', 'n', 'W', 'j', 'r', 'B', 5571], ['i', 313, 2603, 'u', 'l', 2581, 'j', 3013, 2441, 7687, 'z', '9091', 'I', 'Z', 'p', '7257', '2779', 'o', 'h', 'c', 'q', 'C', 4561, 7973, 's']