In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['X', 517, 153, 6053, 'a', 1609, 9893, 'Z', 'O', 5081, 'c', 'V', 'C', 9905, 't', '3339', '8105', 'i', '3883', '2497', 'J', 'g', 'n', 'v', 'D', 'a', 'u', 'm', '9375', '1753', '6297', 'H', 9507, 'S'], ['B', 'y', 4713, 3647, 'F', 1341, 2663, 'j', 't', '3339', '8105', 'i', '3883', '2497', 'J', 'g', 'n', 'v', 'D', 'a', 'u', 'm', '9375', '1753', '6297', 'e', 8313, 7271, 'P', 3129]