In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3401, 5903, 'T', 'n', 'S', 8377, 6691, 'K', 5635, 'g', 'O', 8775, 6893, 'L', '9425', '5485', '1205', 'P', 'S', 'l', 'o', 'j', '4881', '3699', 'v', '981', 't', 'd', '5495', '6819', '4823', 'd', 'A', 'n', 6869, 3403, 235, 343], [1519, 's', 'T', 'L', '9425', '5485', '1205', 'P', 'S', 'l', 'o', 'j', '4881', '3699', 'v', '981', 't', 'd', '5495', '6819', '4823', 'M', 'I', 'S', 5889, 'u', 5331, 'N', 'K', 5203, 5517, 9501, 'B', 8581, 'L', 4789, 's', 'g']