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

[4549, 7553, 425, 1509, 'w', 'g', 'G', 1871, 'W', '7707', 'f', 'Q', '7615', '7225', '3715', '5177', 'W', 'A', '8975', 'S', 'b', '351', 'T', 'b', 4777, 'r', 'x', 8895, 6819, 2793], [127, 'j', '7707', 'f', 'Q', '7615', '7225', '3715', '5177', 'W', 'A', '8975', 'S', 'b', '351', 'T', 'Z', 'e', 'S', 7977, 'X', 'o', 6881, 4805, 3227, 105, 3871]
7707, f, Q, 7615, 7225, 3715, 5177, W, A, 8975, S, b, 351, T