In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 5617, 'x', 'W', 'I', 6947, 't', '3535', '45', 'G', 'T', '7255', '9577', 'y', '8485', 'B', 'N', 'S', 'Z', '6979', 'V', 8953, 'A', 's', 1029, 'O', 'I', 'X'], [8975, 'Q', 'B', 301, 'U', 5449, 1271, 4341, 't', 'e', 5955, 'c', 3083, 't', '3535', '45', 'G', 'T', '7255', '9577', 'y', '8485', 'B', 'N', 'S', 'Z', '6979', 'x', 5561, 'O', 1525]