In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7459, 'e', 'm', 8199, 'R', 711, '4143', '6971', '51', '10011', 'R', 'a', 'v', 'd', 'P'], ['G', 'V', 6473, 6617, 'x', 467, '4143', '6971', '51', '10011', 'R', 'a', 'v', 'W', 'i', 'T']