In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['j', 'r', 5391, 5, 'G', 1163, 'q', 'y', 'O', 8895, '4911', 'B', '7017', 'b', '7513', 'n', 'k', 'Q', 'p', '137', 'r', 'F', 'D', 'r', 'q', 'q', 'E', 'N', '9269', '7841', 'z', 4573, 'S', 'h', 't', 'y', 'm', 'x', 'I', 'c'], ['F', 1517, 1609, 'S', 7605, 'c', 2343, 'J', 6515, 'F', 'c', '4911', 'B', '7017', 'b', '7513', 'n', 'k', 'Q', 'p', '137', 'r', 'F', 'D', 'r', 'q', 'q', 'E', 'N', '9269', '7841', 'x', 'o', 5617, 2899, 'G', 7599, 'c', 2367, 3891, 'l', 9667, 1703, 'X', 'W', 'f', 'c', 4169]