In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6509, 6237, 1693, 'P', 'l', 'Z', 'f', 'P', 'u', '7223', 'y', '9819', '9533', 'j', '343', 'b', '1237', '1059', 'Y', 'E', 'l', 9455, 3529, 7919, 'R', 'g', 'E', 'O', 5515], [8383, 8051, 'T', 4719, 'M', 6211, 'N', 'G', 'f', 'P', 'u', '7223', 'y', '9819', '9533', 'j', '343', 'b', '1237', '1059', 'Y', 'G', 'J', 'x', 'Q', 3931, 'C', 'F', 8317, 2913, 8065, 'C']