In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['t', 9607, 1239, 'Z', 5655, 1871, 'b', '3717', '5053', '2613', 'k', 'S', 'Q', 'v', '6123', '1917', 'S', 'F', 'Z', 'p', 'Y', 'd', 2561, 3921, 9937, 'M', 'F', 'F', 8527, 'l', 'L'], [9099, 'U', 's', 6447, 'Y', 'x', 5309, 'k', 3623, 'g', 795, 'F', 'L', 'b', '3717', '5053', '2613', 'k', 'S', 'Q', 'v', '6123', '1917', 'S', 'F', 'Z', 'p', 'B', 2115, 'B', 9299, 'b', 1311, 'J', 3741]