In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3921, 181, 9775, 3681, 'n', 9145, 1931, 'j', 'G', 't', 7479, 487, 1837, 'C', 'u', 'G', 'V', '1647', 'T', 'O', 'Z', '431', 'H', 'o', '4139', 'J', 'L', '1139', 'X', 'K', '8985', '8247', '4001', 'o', 'A', 't', '7059', 'k', '5429', '8203', 'c', 'z', 'H', '1337', 'j', 3499, 'o', 3365, 3733, 3145, 'G', 545, 'B', 'I', 'N', 'Q', 1, 'k'], ['Y', 'R', 8925, 'A', 3997, 'E', 'b', 'G', 'x', 'G', 'V', '1647', 'T', 'O', 'Z', '431', 'H', 'o', '4139', 'J', 'L', '1139', 'X', 'K', '8985', '8247', '4001', 'o', 'A', 't', '7059', 'k', '5429', '8203', 'c', 'z', 'H', '1337', 'Y', 2903, 'c', 'S', 't', 7941, 4543, 4401, 'l', 'H', 685, 6115, 'L', 6117]