In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6703, 'h', 'x', 365, 'P', 'E', 'U', '7249', 'B', '8911', '7723', '4661', '2897', '1977', 'B', '2559', '4237', '3603', 'w', '4405', '1409', 'Y', 'l', 'A', 'f', 4915, 'C', 8057, 9263, 3697, 'n', 2767], ['t', 7861, 'H', 9503, 3197, 'w', 5125, 8097, '7249', 'B', '8911', '7723', '4661', '2897', '1977', 'B', '2559', '4237', '3603', 'w', '4405', '1409', 'Y', 'q', 3675, 'j', 'B', 'o', 'o', 2939, 9615, 3761, 'I']