In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7807, 6429, 'n', 813, 'R', 3267, 'H', 'y', 9829, 'Y', 'Z', 'd', 'f', '5325', '6891', 'F', 'Y', '4571', '573', 'W', 'r', '8721', '1365', 't', 'X', '3843', '7417', 'Q', 'f', '6675', '3017', 'L', 'Q', 'i', '457', 'q', 'F', '6893', '4687', '1377', 'm', 'x', 9601, 319, 'y', 2935], ['M', 6087, 9083, 'L', 's', 6601, 'j', 8029, 'O', 7763, 'u', 'B', 'i', 4227, 2787, 'e', 1451, 'E', 'Q', 'r', 'D', 9161, '5325', '6891', 'F', 'Y', '4571', '573', 'W', 'r', '8721', '1365', 't', 'X', '3843', '7417', 'Q', 'f', '6675', '3017', 'L', 'Q', 'i', '457', 'q', 'F', '6893', '4687', '1377', 'q', 'G', 't']