In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9049, 'c', 'B', 'H', '8393', '3255', 'C', '6239', 'G', '1819', '6771', '1217', '2853', '7341', 'C', 'S', '2155', 'N', '2837', 'N', 'v', '9271', 'Q', 'g', '8921', '7371', 'G', 'N', 'z', 8197, 'p', 8453, 2429, 1051, 'Y', 4315, 5473, 't', 4905, 'J', 'l', 5959, 't', 'x', 'F', 8431], [9507, 2299, 6223, 3229, 4513, 3943, 'R', 2817, '8393', '3255', 'C', '6239', 'G', '1819', '6771', '1217', '2853', '7341', 'C', 'S', '2155', 'N', '2837', 'N', 'v', '9271', 'Q', 'g', '8921', '7371', 'G', 'T', 3597]