In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7347, 6443, 'V', 1295, 8553, 'I', 'k', 'V', '1841', '2573', 'j', '2821', '9297', 'U', 'l', 'G', 'O', 5149], ['t', 'A', 9799, 2567, 8253, 'r', 'q', 'i', '1841', '2573', 'j', '2821', '9297', 'U', 'l', 'G', 'Y', 887, 247, 5367, 8917, 'T', 'R']