In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4981, 3681, 3533, '481', '8831', 'X', '47', '6411', '4539', 'T', '131', 'I', 'D', 'k', 'A', 8769, 4745], [7605, 'i', '481', '8831', 'X', '47', '6411', '4539', 'T', '131', 'J', 4891, 4879]