In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8523, 4561, 'g', '7619', '2605', '923', '1605', 'T', '5689', 's', 'p', 'W', 'C'], ['C', 293, 6375, 'r', 7349, 'Y', '7619', '2605', '923', '1605', 'T', '5689', 'h', 'U']