In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6911, 1335, 1943, 5933, 'C', 'p', 9711, 'A', 2859, '6005', 'b', 'O', 'V', 'Z', '1359', '6251', '6755', '2757', 'h', '1877', 'g', 'J', 'f', '787', '547', 'f', '9499', '2933', 'r', 7963, 2317, 'e', 6511, 'W'], ['x', 'O', 4283, 3629, 'm', 'e', 1345, 7475, 'h', 's', 2637, 1491, 5149, '6005', 'b', 'O', 'V', 'Z', '1359', '6251', '6755', '2757', 'h', '1877', 'g', 'J', 'f', '787', '547', 'f', '9499', '2933', 'U', 'r', 'd', 4729, 5027, 'N']