In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8121, 'A', 'K', 7307, 'q', 3595, 6967, 7945, 8631, 2603, 'u', 'I', 'B', 8355, 405, 'x', 'J', 'n', '9719', 'J', 'm', 't', 'S', 'b', 'H', '4375', 'i', '1379', 'a', 'o', 'T', 'X', '9983', 'X', '8207', 'a', 'n', '1379', 'L', '2701', 'U', 'G', 'f', '7673', 'w', 4785, 's', 'D', 'd', 1441, 'R', 'x', 5435], [8237, 1935, 7259, 8399, 6833, 'O', 'D', 'u', 'q', 3513, 7087, 'L', 2175, 't', 'N', 5423, 'V', 6807, 413, 6831, 2233, 'z', 943, 9931, 1879, 'W', 'g', 9973, 5141, 'x', 'J', 'n', '9719', 'J', 'm', 't', 'S', 'b', 'H', '4375', 'i', '1379', 'a', 'o', 'T', 'X', '9983', 'X', '8207', 'a', 'n', '1379', 'L', '2701', 'U', 'G', 'f', '7673', 'q', 7699, 3295, 3763, 'l', 5923, 'O', 5587, 1301, 'G', 'd', 3713, 'X', 'f', 9727]