In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[641, 'S', 'X', 'z', 4889, 5577, 'f', 'K', 4151, 'I', 3883, 511, 'y', 7333, '125', '933', 'A', '4571', 'V', '9597', 'T', 'S', '5519', 'g', 'z', 'm', 'O', 't', 'T', '7241', 'n', 'x', '6943', 'q', 7115, 8237, 'G', 'F', 'j', 2437, 7631, 9983, 'Z'], ['j', 7931, 'e', 1833, 'O', 'T', 'L', 2669, 'V', 'e', 'r', 8177, 'A', 'k', 'K', 'l', 5879, '125', '933', 'A', '4571', 'V', '9597', 'T', 'S', '5519', 'g', 'z', 'm', 'O', 't', 'T', '7241', 'n', 'x', '6943', 'c', 'i', 'k', 9469, 4459, 'N', 'q']