In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[457, 'V', 'I', 'p', 'u', 'v', 'O', '3027', 'F', '5415', 'c', '7999', 'F', '6427', 'd', 'a', 5007, 3107, 8869, 9113], ['P', 2761, 5201, 7327, 'H', 6099, '3027', 'F', '5415', 'c', '7999', 'F', '6427', 'u', 6417]