In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6355, 8363, 5277, 2663, 639, 7897, 2533, 'X', 'D', 6199, 'u', 'R', 8789, 907, 'f', 'F', '7781', 'z', 'D', '3337', 'J', 'F', 'b', '2943', 'Y', '2953', '6547', '9699', '2529', '91', 'g', 'M', 's', '5377', 'W', '243', '2581', '1151', 'f', '6755', '9705', '2891', 'C', 'B'], ['y', 'A', 5383, 9925, 6455, 'w', 2749, 'f', 'p', 8899, 7571, 5549, 6907, 5447, 'f', 573, 6595, 4915, 's', 7787, 'b', 'Y', 7191, 'Q', 9529, 'F', '7781', 'z', 'D', '3337', 'J', 'F', 'b', '2943', 'Y', '2953', '6547', '9699', '2529', '91', 'g', 'M', 's', '5377', 'W', '243', '2581', '1151', 'f', '6755', '9705', '2891', 'l', 'u', 7417, 7985, 'B', 9903, 'P', 7885, 'P', 'U', 593, 'l', 'U', 7601, 1347]