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

['u', 1645, 5453, 'i', '169', '209', 'M', 'Y', 's', '3849', '8559', 'I', '2131', '8409', 'k', '531', '3773', 'h', 'q', 'n', '7449', 'q', 'Q', 8369, 9531, 'm', 7181, 'z', 6429, 4991, 8355, 'i'], [3713, 'p', 'i', '169', '209', 'M', 'Y', 's', '3849', '8559', 'I', '2131', '8409', 'k', '531', '3773', 'h', 'q', 'n', '7449', 'q', 'w', 'h', 'c', 5089, 'R', 2675, 'M', 3529, 'Z', 'T', 4411]
i, 169, 209, M, Y, s, 3849, 8559, I, 2131, 8409, k, 531, 3773, h, q, n, 7449, q