In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.

[2471, 'X', 'n', 4401, 3145, 2061, 'Y', 6533, 'V', 'M', 8583, 'i', 'R', 2323, 'W', 7337, 5973, 'n', '7877', '4879', 'F', '8043', '3261', 'l', '1811', 'm', 'r', '2695', '2951', '9407', '4215', 'h', '839', '9373', '5483', 'L', 'h', 2513, 4295], [4543, 'm', 'b', 'q', 'w', 'n', '7877', '4879', 'F', '8043', '3261', 'l', '1811', 'm', 'r', '2695', '2951', '9407', '4215', 'h', '839', '9373', '5483', 'L', 'l', 4427, 's', 'c', 'O', 'X', 'B', 2235, 'V', 5709, 'k', 9829, 3251, 'r', 'b', 'F', 5823, 667, 1105]
n, 7877, 4879, F, 8043, 3261, l, 1811, m, r, 2695, 2951, 9407, 4215, h, 839, 9373, 5483, L