In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6483, 'O', 293, 7021, 'P', 's', 3209, 8457, 4801, 'z', 'r', 'd', 'r', 'V', 'N', 'L', '6897', '847', '259', '5811', 'S', '1209', '6189', 'r', 'y', '6717', '1523', 'f', 'S', 'a', '4647', 'D', '5281', '899', '5091', 'L', '53', 'E', 9253, 7725, 5105, 'c', 'u', 9451, 'B'], [7137, 8577, 'x', 'd', 'r', 'V', 'N', 'L', '6897', '847', '259', '5811', 'S', '1209', '6189', 'r', 'y', '6717', '1523', 'f', 'S', 'a', '4647', 'D', '5281', '899', '5091', 'L', '53', 'L', 'v', 8337, 'h', 'A', 8653, 'd', 'q', 'h', 'q', 'Q', 3997, 9115, 'u', 'c', 'I', 'e', 7383, 7255, 8923, 6707, 6661, 87]