In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[455, 5425, 2307, 'J', 327, 't', 'c', 'b', 6749, 7017, 'W', 'J', '7781', 'g', '7793', '7355', 'V', '5905', '9737', '1183', 'x', '4965', 'h', '7671', 'X', 'x', 'V', '2529', 'r', '2961', '5337', '993', '8789', '6837', 'L', 4491, 'u', 't', 'v', 'P', 'n', 8189, 'C', 'G', 6899, 'L', 9701, 'c', 3957, 7607, 1245, 'M', 'I', 2799], [2217, 'B', 'G', 8865, 'Z', 5559, 'H', 1391, 6963, 'w', 'e', 'f', 9921, 'N', 2189, 'T', 'k', 'n', 6323, 6659, 'm', '7781', 'g', '7793', '7355', 'V', '5905', '9737', '1183', 'x', '4965', 'h', '7671', 'X', 'x', 'V', '2529', 'r', '2961', '5337', '993', '8789', '6837', 'a', 2811, 'K', 'J', 1933, 'X', 'G', 'p', 'X', 'n', 'g', 975, 6475, 'h', 'S']