In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['s', 'h', 6999, 'c', 2259, 'f', 'Y', 'X', 6643, 5625, 'q', 4965, 2077, 9889, 'T', 'o', 'y', 3725, 'a', 'I', '8029', '9725', 'I', 'I', 'B', '3451', 'i', 'A', '2769', 'a', '8923', '3251', 'V', '6741', 'r', '3391', '4137', '3393', '6305', 'R', '5091', 'T', 'l', '2879', '9755', 'i', 4979, 'd', 'K', 't', 2811, 'M', 'n', 'q', 'M', 7389, 'W', 'e', 6297, 'p', 'A', 179, 'z'], [7117, 2019, 2795, 1323, 's', 4657, 8225, 3267, 6425, 6619, 9427, 2675, 8481, 1653, 6467, 8529, 8485, 'u', 'Y', 'a', 'I', '8029', '9725', 'I', 'I', 'B', '3451', 'i', 'A', '2769', 'a', '8923', '3251', 'V', '6741', 'r', '3391', '4137', '3393', '6305', 'R', '5091', 'T', 'l', '2879', '9755', 'q', 'm', 'j', 'g', 'E', 'c', 5369, 6091, 5885, 923, 2515, 'z', 'T', 9175, 'y', 5439]