In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['b', 'u', 1837, 'G', 'o', '3743', '689', 'R', '3551', '5395', '9649', 'k', '5329', 'J', 'K', 5103, 9655, 'i', 8563, 9829, 'J', 9107], [6843, 7169, 7089, 8095, 3511, 'o', '3743', '689', 'R', '3551', '5395', '9649', 'k', '5329', 'Y', 9451, 'B', 'k', 4263, 'r', 'E', 'c']