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

[EX Q]: [621, 7677, 'b', '889', '6721', 'H', 'd', 'S'], [8151, 'F', 'b', '889', '6721', 'h', 4123]
[EX A]: b, 889, 6721

[EX Q]: ['R', 'k', 'g', 4045, 'W', '4923', '9161', '4031', '7443', 'f', 'U', 2683, 'Y'], [943, 'v', '4923', '9161', '4031', '7443', 'f', 't', 'm', 9213]
[EX A]: 4923, 9161, 4031, 7443, f

[EX Q]: [3067, 1391, 7801, 'l', 2387, 'W', '8587', 'u', 'g', 'G', '4301', 'T', 'h', '1031', '3693', 'A', '645', '4689', 'l', 'f', 's', 'm', '1469', '1841', 'v', '2491', 'E', 'M', '6497', 'B', '1767', '7887', 'u', 'P', '357', 'F', 'v', 9329, 'o', 'E', 9685, 3275, 'H', 2795, 2529, 8583, 'w', 8053, 'f'], [3507, 2343, 'i', 1461, 'b', 'B', 9325, 2477, 'J', 213, 3105, 1463, 5919, 8895, 3591, '8587', 'u', 'g', 'G', '4301', 'T', 'h', '1031', '3693', 'A', '645', '4689', 'l', 'f', 's', 'm', '1469', '1841', 'v', '2491', 'E', 'M', '6497', 'B', '1767', '7887', 'u', 'P', '357', 'H', 1959, 'W', 8805, 'f', 7963, 'F']
[EX A]:
8587, u, g, G, 4301, T, h, 1031, 3693, A, 645, 4689, l, f, s, m, 1469, 1841, v, 2491, E, M, 6497, B, 1767, 7887, u, P, 357