In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4911, 2005, 7259, 9209, 5687, 4665, 'n', '5549', 'b', 'l', 'X', 'O', '11', '9945', 'M', '8235', 'p', 'd', '5665', 'C', 'k', 'r', '4641', '5075', 'R', 2169, 1143], [701, 'y', 'n', '5549', 'b', 'l', 'X', 'O', '11', '9945', 'M', '8235', 'p', 'd', '5665', 'C', 'k', 'r', '4641', '5075', 'u', 'f', 7279, 861, 5523, 8449, 4979, 'f', 1267]