In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6671, 3065, 8413, 9497, 3369, 619, 'j', 7089, 'u', 4919, 'm', 'k', 5507, 9477, 'L', 'K', '987', '1735', '8343', 'W', 'S', '8201', '2141', '1681', '6271', '165', '6279', '8553', 'j', '6443', 'N', 8439, 7807, 'o', 8349, 'u', 7907, 6947, 9227, 6319, 343], ['t', 'O', 621, 6147, 9523, 8177, 8485, 'z', 'b', 'g', 2281, 2461, 'K', '987', '1735', '8343', 'W', 'S', '8201', '2141', '1681', '6271', '165', '6279', '8553', 'j', '6443', 'c', 'H', 9853, 'Y', 887, 2399, 5903, 8475, 'G', 'g', 9761, 1193, 1337, 8437, 7627]