In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7231, 7221, 'P', 6053, 2283, 1929, 631, 'y', 'p', 603, 2381, 'o', '6687', '4013', '6085', 'H', '8117', '8617', '7819', 'A', 'L', 'x', 'S', 'w', '3177', 'm', 'O', '9455', 't', '9167', 'U', 3095, 2071, 'Q', 'w', 477, 8299, 'F', 1371, 5113, 4555, 'o', 'd', 8691], [1927, 'P', 9503, 8921, 7433, 'a', 'o', '6687', '4013', '6085', 'H', '8117', '8617', '7819', 'A', 'L', 'x', 'S', 'w', '3177', 'm', 'O', '9455', 't', '9167', 'V', 4959, 'D', 6115, 'T', 'u']