In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6623, 'M', 'p', 2325, 'C', 'L', 'm', 5681, 'o', 6631, 6021, '1453', '1993', 'v', 'J', 'o', '6813', 'W', '5255', 'a', 'C', '2935', '4613', 'S', 'B', 'R', 'N', 'W', 'Q', 'y', 'C', 'r', 241, 'C'], ['i', 'T', 'e', 'k', 'O', '1453', '1993', 'v', 'J', 'o', '6813', 'W', '5255', 'a', 'C', '2935', '4613', 'S', 'B', 'R', 'N', 'W', 'Q', 'g', 's', 911, 9433, 5485, 7227, 'w', 4655, 'R', 'm', 'P', 'B', 'x', 'p', 6695, 3463, 'F']