In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4973, 7751, 8887, 'o', 'd', 'E', 'x', '5983', 'X', '1439', '3711', 'm', 'K', '7795', '8965', 'o', 'C', '7479', 'c', 'L', 'W', 'u', 4015, 'D', 'Z', 'X'], ['w', 3033, 4371, 'M', 6769, 8775, 'Q', 'x', '5983', 'X', '1439', '3711', 'm', 'K', '7795', '8965', 'o', 'C', '7479', 'S', 1873, 't', 'L', 9321, 'x', 'L', 8549, 4305, 6157]