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

['A', 'F', 'F', 7693, 1047, 'j', 9083, 9189, 'X', 3647, 6677, 'l', 'r', 'U', 'T', '4673', '1831', 'y', 'v', 'R', '5821', '5273', '7243', 'R', 'Z', 'X', '1487', '2661', '8397', 'q', 'm', 'M', '9555', 'c', 's', 'G', '2117', '4135', 'g', 's', 'Z', 4943, 'M', 'q', 'd', 9903, 523, 2081, 'x'], [3143, 'F', 8057, 'd', 9451, 5585, 6895, 'Y', 4665, 3075, 3657, 'b', 'L', 'U', 'T', '4673', '1831', 'y', 'v', 'R', '5821', '5273', '7243', 'R', 'Z', 'X', '1487', '2661', '8397', 'q', 'm', 'M', '9555', 'c', 's', 'G', '2117', '4135', 'k', 'u', 1003, 'T', 1373, 9835, 4563, 3629, 767, 3799, 1757, 7193, 'Q']
U, T, 4673, 1831, y, v, R, 5821, 5273, 7243, R, Z, X, 1487, 2661, 8397, q, m, M, 9555, c, s, G, 2117, 4135