In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['x', 495, 'L', 'O', 2935, 'y', 163, 3507, 6515, '5249', '9751', '8269', '923', '10005', '9739', 'u', 'X', 'y', '4535', 'I', 'V', 'f', '8511', '8955', 's', '2255', '1', '7831', 't', 'w', 1985, 'F', 'V', 5375, 6359, 7963, 4103, 2625, 'p', 'N', 7945, 'L', 6909], [251, 'J', 'k', 4075, 'd', 'x', 'j', 'K', 'u', 605, 1667, 8527, 6845, 2537, 'O', 9259, 'o', 'B', '5249', '9751', '8269', '923', '10005', '9739', 'u', 'X', 'y', '4535', 'I', 'V', 'f', '8511', '8955', 's', '2255', '1', '7831', 't', 'j', 'S', 'H', 1289]