In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9157, 1871, 1757, 'a', 'a', 2491, 295, 4645, 'B', 'B', 3461, 'V', 'd', 'R', 'u', 'd', 8961, 'v', 3285, 9873, 'S', 'a', 1055, 'N', 'b', 'X', '6483', '2135', '297', 'J', '6197', 'g', '3331', 'i', 'A', 'k', '7575', 'T', '3795', '5803', '8385', '1387', 'Q', '4837', 'N', '1351', 't', '1555', 'y', 'h', '2465', '6873', 'V', 'H', 'B', 'D', 'k', 'o', 8949, 'Z', 'c', 6051, 'V', 'l', 255, 'c', 'L', 'F', 6119, 'z'], [5247, 'I', 6349, 'W', 235, 273, 'D', 9975, 6115, 4235, 'N', 835, 6011, 37, '6483', '2135', '297', 'J', '6197', 'g', '3331', 'i', 'A', 'k', '7575', 'T', '3795', '5803', '8385', '1387', 'Q', '4837', 'N', '1351', 't', '1555', 'y', 'h', '2465', '6873', 'M', 4323, 'y']