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

[4339, 'i', 7857, 315, 'W', '3573', '689', 'y', '9557', 'J', 'b', '2185', 'i', 7649, 'F', 'g', 6973], ['r', 5097, 5467, 't', 'N', 'Y', 'W', '3573', '689', 'y', '9557', 'J', 'b', '2185', 'l', 837, 643, 2055, 'J', 'I']
W, 3573, 689, y, 9557, J, b, 2185

[1373, 'R', 'U', 5661, 'g', 'q', 'e', 'v', 'E', 'Q', 'J', '8395', 'o', 4093], ['K', 4843, 'N', 'e', 'v', 'E', 'Q', 'J', '8395', 'V', 3155, 'V', 'H', 'X', 'C']
e, v, E, Q, J, 8395

['s', 'd', 2493, 6791, 'K', '327', 'U', '1963', '7201', '9051', 'O', 'n', 'Y', 'd', 'J', '3073', 'R', '7213', '7305', 'p', 'W', 'l'], ['Z', 'W', 5849, 5577, 7771, 6871, '327', 'U', '1963', '7201', '9051', 'O', 'n', 'Y', 'd', 'J', '3073', 'R', '7213', '7305', 'p', 'L', 'u', 'j', 113, 7645, 3585, 'H', 'a', 5905, 3747, 9345, 9987, 'g']
327, U, 1963, 7201, 9051, O, n, Y, d, J, 3073, R, 7213, 7305, p