In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.

[2921, 'M', 287, 'l', 3723, 'Z', 'g', 'Q', 'Q', 'Y', 1525, 2753, 'h', 'P', '4361', '8105', '1753', '4937', '1655', '8939', 'N', 'Q', '6089', '2127', '2275', 'Z', '3145', 'x', 'K', 'b', 'y', 's', 1753, 5605, 8983, 2849, 'U', 4835, 33], [771, 2039, 6411, 'x', 'W', 'b', 'h', 2399, 9259, 's', 'w', 9349, 'P', '4361', '8105', '1753', '4937', '1655', '8939', 'N', 'Q', '6089', '2127', '2275', 'Z', '3145', 'x', 'K', 'b', 'D', 'h', 'K', 2269, 'J', 'c', 'd', 7703, 'c', 5443, 5395, 'j']
P, 4361, 8105, 1753, 4937, 1655, 8939, N, Q, 6089, 2127, 2275, Z, 3145, x, K, b