In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['H', 'T', 9471, 'u', 'E', 7713, 'O', 8121, 'Y', 'G', 'O', 'H', 'r', '121', 'z', '8567', 'S', '5383', '9893', 'B', 'E', 'a', 'I', '6981', '2869', '8397', '3255', '7887', '519', '2451', 'c', 'Z', '6045', 'm', 3041, 5851, 5325, 'P', 3651, 'r', 'f', 'T', 6463, 'n', 'X', 'N', 543, 8997], [2547, 1615, 'C', 'O', 'H', 'r', '121', 'z', '8567', 'S', '5383', '9893', 'B', 'E', 'a', 'I', '6981', '2869', '8397', '3255', '7887', '519', '2451', 'c', 'Z', '6045', 'l', 'r', 4733, 6139, 'V', 'B', 'D', 'Y', 1101, 63, 9631, 'O', 'q']