In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7755, 'B', 'v', 3885, 7081, 'K', 'Y', 8663, 1317, 'k', 'X', 6283, 2481, 2431, 1407, 'E', 'u', '4753', 'R', 'L', '4099', 'w', '9269', 'F', 'r', 'Y', '2943', 'E', 'y', '5355', 'o', 'W', 'Y', '7821', 'Y', 'M', '6973', 'x', 'n', '2939', 'X', '8959', '5125', 'k', 'p', '6179', 'R', 'G', 1915, 'l', 'Z', 'h', 'N', 'p', 'f', 445, 191, 'y', 7637, 'J', 3063, 'g', 'n', 4799, 199, 2655, 7869, 'P', 'c', 4791], ['M', 'L', 'n', 2199, 1495, 7427, 7025, 'L', 's', 4437, '4753', 'R', 'L', '4099', 'w', '9269', 'F', 'r', 'Y', '2943', 'E', 'y', '5355', 'o', 'W', 'Y', '7821', 'Y', 'M', '6973', 'x', 'n', '2939', 'X', '8959', '5125', 'k', 'p', '6179', 'U', 4837, 'J', 'R']