In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9639, 'C', 9853, 'A', 'k', 633, 1303, 6893, 1461, 'O', 'i', 'E', 'L', 8811, 1123, 1523, 285, 'G', 6701, 'v', 'E', 2799, 9503, '6601', 'Z', 'H', '2771', '1129', 'G', '3897', '3577', '1459', '6281', '7955', '3751', '5339', 'R', '4343', '9107', 'Q', 'H', 'r', 'I', 'n', '5191', 'E', '3385', '9711', 'g', 'W', 'O', 9249, 3181, 3455], ['x', 'l', 7827, 8297, 'D', 5453, 6611, '6601', 'Z', 'H', '2771', '1129', 'G', '3897', '3577', '1459', '6281', '7955', '3751', '5339', 'R', '4343', '9107', 'Q', 'H', 'r', 'I', 'n', '5191', 'E', '3385', '9711', 'g', 'W', 'y', 4363, 8699, 'H', 'h', 4081, 'F', 'S', 8027, 'p', 'j']