In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['v', 8697, 9615, 'W', 115, 'M', 8113, 's', 5871, 'w', '237', 'D', 'n', 'C', '625', '8355', '1057', 'l', 'L', 'X', 'a', '3167', 'r', 'I', 'I', 'c', 7313, 'W', 'L', 'c', 5003, 'j', 'F', 'f', 1873], ['g', 'I', 'U', '237', 'D', 'n', 'C', '625', '8355', '1057', 'l', 'L', 'X', 'a', '3167', 'r', 'I', 'I', 'b', 'U', 'E', 9385, 'H', 5827, 9715, 'v', 3193, 'W', 'L', 'f', 'r', 2479, 'i']