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

Ex Input:
['Q', 'N', 'm', 'L', 2015, 'W', 'D', 'd', 'c', 'Q', 'I', 'N', 'W', 'j', 'A', 6921, 'X', 'H', 'N', 'l', 'U', 'p', '4397', 'X', '1559', '167', 'i', '8689', '9273', 'J', 'r', 'a', 'K', '5511', 'R', 'z', 'T', 'f', 'V', 'E', 'V', 6753, 'z', 2281, 'Y', 7397, 115, 3973, 8083, 6475, 'L', 'z', 5969, 3581, 'm', 3171, 3211], ['R', 5629, 'k', 3959, 'R', 'O', 'U', 'V', 'N', 'o', 3345, 'P', 4317, 'M', 'g', 8331, 'v', 'T', 'R', 'Y', 'X', 'H', 'N', 'l', 'U', 'p', '4397', 'X', '1559', '167', 'i', '8689', '9273', 'J', 'r', 'a', 'K', '5511', 'R', 'z', 'T', 'f', 'r', 'u', 9505, 3363, 4823, 'w', 'i', 'B', 'Q', 'Y', 'H', 'R', 2991, 's', 'U', 5579, 'C', 'F', 'E', 'j', 'P']

Ex Output:
X, H, N, l, U, p, 4397, X, 1559, 167, i, 8689, 9273, J, r, a, K, 5511, R, z, T, f


Ex Input:
['W', 'Y', 'y', 'A', 'm', '6915', '3285', 'd', '1035', 'H', 'J', '7549', 'P', '5301', 'q', '4057', 'H', '5697', 'H', '5141', 'H', 2451, 'x', 3307, 'A', 7121, 'b', 3319], ['M', 'L', 5827, 'I', 'r', 'f', '6915', '3285', 'd', '1035', 'H', 'J', '7549', 'P', '5301', 'q', '4057', 'H', '5697', 'H', '5141', 'N', 3371, 691]

Ex Output:
6915, 3285, d, 1035, H, J, 7549, P, 5301, q, 4057, H, 5697, H, 5141


Ex Input:
[6509, 6237, 1693, 'P', 'l', 'Z', 'f', 'P', 'u', '7223', 'y', '9819', '9533', 'j', '343', 'b', '1237', '1059', 'Y', 'E', 'l', 9455, 3529, 7919, 'R', 'g', 'E', 'O', 5515], [8383, 8051, 'T', 4719, 'M', 6211, 'N', 'G', 'f', 'P', 'u', '7223', 'y', '9819', '9533', 'j', '343', 'b', '1237', '1059', 'Y', 'G', 'J', 'x', 'Q', 3931, 'C', 'F', 8317, 2913, 8065, 'C']

Ex Output:

f, P, u, 7223, y, 9819, 9533, j, 343, b, 1237, 1059, Y