In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4019, 'y', 's', 'w', 's', 2091, 3677, 93, 9299, 3847, 'C', 6205, 2827, 3239, 'E', 'W', 10011, 'l', '6175', '4313', '2155', '4065', 'n', '7151', 'H', '8423', 'O', '6993', 's', '659', 'Q', '2497', '7817', '6023', '6985', 's', '403', '2587', '8311', '2565', '6781', 'E', '7609', '2799', 'b', 'C', 'p', 'C', 6149, 'v', 9595, 'T'], ['X', 'n', 6921, 4619, 5611, 'b', 'v', 7981, 6541, 'y', 'v', 'G', 'L', 'Z', 6873, '6175', '4313', '2155', '4065', 'n', '7151', 'H', '8423', 'O', '6993', 's', '659', 'Q', '2497', '7817', '6023', '6985', 's', '403', '2587', '8311', '2565', '6781', 'E', '7609', '2799', 'b', 'C', 'p', 'u', 6269, 'u', 'H', 'W', 3457, 'l', 6069, 7783, 3277, 5165, 9473, 8825, 'I', 'Y', 'H']