In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4733, 'O', 5113, 'I', 5415, '7447', '1503', '3025', '1935', '7875', '1131', 'T', '6459', 'I', 'y', 7763, 'x', 6957, 8453, 7815, 9417, 'i', 325], ['B', 'O', 3389, '7447', '1503', '3025', '1935', '7875', '1131', 'T', '6459', 'I', 'W', 'i', 99, 6821, 'N', 'Z', 3753]