In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['n', 6527, 307, '5089', '9201', 'f', '3175', 'd', 'C', 'H', '6745', '5739', 'c', '8023', 'y', '6567', '1077', 'L', '821', '1855', 'k', '1447', 'F', 'V', 7501, 3525, 'i', 8609, 'h', 3441, 5923, 'w', 'k'], ['O', 'A', 7715, 'b', 399, 1955, 'S', 5253, 6471, 't', 1011, 2993, 5733, 1059, '5089', '9201', 'f', '3175', 'd', 'C', 'H', '6745', '5739', 'c', '8023', 'y', '6567', '1077', 'L', '821', '1855', 'k', '1447', 'F', 'o', 5971, 2669, 'f', 'T', 'P', 'j', 'A']