In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['O', 6231, 'r', 'j', '6453', '469', '7841', '1473', 'X', 'h', '4963', 'M', 'T', '1349', 'U', '6727', 'K', 'E', 'E', 'V', 3247, 'C', 'z', 'J'], ['C', 5951, 'K', 'L', 2473, 2835, 'M', 81, 'J', 7837, 797, 'z', 4217, '6453', '469', '7841', '1473', 'X', 'h', '4963', 'M', 'T', '1349', 'U', '6727', 'K', 'E', 'e', 7403, 'p', 'A', 6435, 8381, 909, 6719, 'q', 1045, 'k', 'm', 'H']