In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['t', 'F', 5067, 'N', 'N', 'e', 7615, 3511, 'b', 'P', '8083', 'e', 'u', '323', '9211', 'W', 't', 'f', 'r', 'U', '9479', '9551', 'N', 'U', 'n', '8681', 'K', 'C', 'k', 2571, 6361, 7619, 'T', 'S'], [2029, 'x', 'U', 6297, 6465, 8053, 8651, 2225, 'Z', 1563, 7763, 'S', 'O', 'O', 'Y', '8083', 'e', 'u', '323', '9211', 'W', 't', 'f', 'r', 'U', '9479', '9551', 'N', 'U', 'n', '8681', 'K', 'H', 'p', 'K', 'L', 'K']