In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4345, 3025, 8271, 'b', 7639, 7163, 3213, 8391, 7369, 'u', 7251, 1271, 'G', 'E', 9881, 9545, 'X', 'J', '1867', 'I', '1297', '8971', 'z', 'w', '2991', 'x', '9159', 'R', '8499', '7655', '4705', '2509', '7323', '8105', 'o', 'I', 'w', 'W', 'n', '3865', '3413', 'B', '6819', '2599', '4203', '501', 'r', 'Q', 'q', 'l', 'U', 'B', 9669, 2975, 'A', 7387, 'l', 'c', 'E', 'm', 4753, 'U', 2017, 'w'], [1813, 4635, 'J', '1867', 'I', '1297', '8971', 'z', 'w', '2991', 'x', '9159', 'R', '8499', '7655', '4705', '2509', '7323', '8105', 'o', 'I', 'w', 'W', 'n', '3865', '3413', 'B', '6819', '2599', '4203', '501', 'p', 'h', 'Z', 2303, 'x', 'V', 'm', 'x', 'U']