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

[6507, 8623, 6879, '1327', '6971', 'd', 'A', 3663, 7831], [1711, 4751, 3479, '1327', '6971', 'd', 'u', 1771]
1327, 6971, d

['U', 'S', 1413, 'O', 'j', 5221, 6645, 7877, 5445, 'K', 7223, 'u', 'J', 'U', 'Q', 'F', '1723', '639', 's', '4473', 'H', '3351', '7653', '2801', '5123', 'V', '9073', '8733', '7617', '1785', 'j', '7085', '895', 'm', '7831', '5757', '255', 'i', 'n', 9101, 'Q', 6009, 'f', 5025, 5631, 4575, 't', 'u', 8185, 'Z', 1459, 9567, 1549, 9011, 'A', 'k', 'w', 1513, 1063, 8087, 't'], [8547, 'W', 1709, 'c', 'J', 'U', 'Q', 'F', '1723', '639', 's', '4473', 'H', '3351', '7653', '2801', '5123', 'V', '9073', '8733', '7617', '1785', 'j', '7085', '895', 'm', '7831', '5757', '255', 'K', 4041, 6407, 6049, 9859, 4451, 7035, 5861, 323, 3431, 'g', 'X', 'h', 441, 1471, 'I', 343, 1955, 'E', 'K', 7927, 'F', 'S', 'E']
J, U, Q, F, 1723, 639, s, 4473, H, 3351, 7653, 2801, 5123, V, 9073, 8733, 7617, 1785, j, 7085, 895, m, 7831, 5757, 255

[8603, 6047, 'h', 'P', 5037, 'a', '5777', '2901', '8433', 'H', '6463', '19', '2175', 'F', 'a', '6657', '2733', '5575', '5653', '9873', 'S', '8327', 'Q', 3457, 1331, 'S', 5413, 'N', 1199, 9565, 1955, 'I', 9611, 'D', 'y', 4531, 2223], [2841, 8997, 'a', '5777', '2901', '8433', 'H', '6463', '19', '2175', 'F', 'a', '6657', '2733', '5575', '5653', '9873', 'S', '8327', 'Z', 1867, 1355, 'M']

a, 5777, 2901, 8433, H, 6463, 19, 2175, F, a, 6657, 2733, 5575, 5653, 9873, S, 8327