In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[231, 7429, '3689', '7605', 'T', 'W', 'K', 'F', '117', 'U', 667, 699, 'Z', 's'], ['i', 4371, 'P', '3689', '7605', 'T', 'W', 'K', 'F', '117', 'j', 4645]