In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7257, 'y', 9727, 'w', 'M', 6707, 's', 5953, 2403, 'y', 'B', 'y', 'N', 'F', 'L', 4405, 'L', 5273, 'N', 'I', 'G', 'l', '2007', '6629', 'c', '6323', '4497', '6531', 'M', 'r', 'R', '4861', 'm', '109', 'J', 'w', 'J', 'Z', '2411', 'M', 's', '2205', '2561', '7621', 'v', 'c', '367', 'k', 'J', 3507, 'Z', 'g', 7317, 'D', 'a', 'M', 'x', 3249, 'o', 3787, 7637, 1227, 'X', 7183, 7785, 'h', 'u', 'e', 'M', 1373, 'g', 4661, 'n'], ['G', 'e', 'k', 437, 2209, 'B', 2609, 'n', 'J', 5655, 3945, 'O', 'W', 5477, 3831, 'Z', 'Q', 's', 1981, 'F', 'P', 5261, 'b', 'l', '2007', '6629', 'c', '6323', '4497', '6531', 'M', 'r', 'R', '4861', 'm', '109', 'J', 'w', 'J', 'Z', '2411', 'M', 's', '2205', '2561', '7621', 'v', 'c', '367', 'l', 7279, 123, 1133, 'w', 9089, 'B', 'e', 9477, 'R']