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

[7937, 'O', 't', 'q', 'A', '5875', '3561', '2131', 'L', '9023', 'A', '4107', 'Y', 'h', 'A', '8649', '6349', 'S', '1841', 'X', 'Y', '8859', '2327', 'x', '6845', 'P', 9541, 'K', 'P', 'I', 'd', 2929, 3037, 's', 'o'], [5771, 'e', 6539, 3301, 7501, 1959, 2737, 'W', 347, 'S', 'A', 7789, 1561, 'G', 's', 1703, '5875', '3561', '2131', 'L', '9023', 'A', '4107', 'Y', 'h', 'A', '8649', '6349', 'S', '1841', 'X', 'Y', '8859', '2327', 'x', '6845', 'C', 4525, 2207, 8867, 'D', 'c', 9997, 'f', 'E', 'd', 2503, 527, 's', 'Q', 'Y', 'R', 4405, 'a']
5875, 3561, 2131, L, 9023, A, 4107, Y, h, A, 8649, 6349, S, 1841, X, Y, 8859, 2327, x, 6845

[6103, 'W', 'k', 931, 'r', 'v', 'w', 'X', '5537', '3209', '4831', 'R', '2093', 'U', 'b', 'w'], [9617, 'F', 3411, 'X', '5537', '3209', '4831', 'R', '2093', 'U', 'O', 9311, 5805]
X, 5537, 3209, 4831, R, 2093, U

['Y', 9091, 'B', 9907, 'Y', 'E', 2051, 5561, 'N', 'X', 'h', 'x', 'W', 'J', 'I', 'k', 6113, 'q', '457', '2211', '9727', '2199', 'd', '3859', 'B', '2677', 'z', 'Y', 'q', '7553', 'i', 'J', 'f', 'n', '5709', 'S', 'g', 'n', 'm', 8905, 'Z', 2533], [2985, 'H', 'q', '457', '2211', '9727', '2199', 'd', '3859', 'B', '2677', 'z', 'Y', 'q', '7553', 'i', 'J', 'f', 'n', '5709', 'S', 'b', 'w', 'Q', 3409, 9059, 'J', 'L', 'f', 'D', 'y', 7937, 6357, 'T', 'S', 7807, 'c', 803, 'l', 'M']

q, 457, 2211, 9727, 2199, d, 3859, B, 2677, z, Y, q, 7553, i, J, f, n, 5709, S