In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['H', 'u', 't', 'q', 'a', 9875, 'x', 'H', 'X', 8321, 1857, 't', 'N', 'h', 'q', 'U', 'n', 'k', 't', 'm', 'L', '2313', '5885', 'W', '9357', 'R', '2155', 'g', 'E', 'G', '9247', '8349', '1291', 's', '3501', 's', '9777', '9965', '6443', 'h', 'n', 4233, 'u', 'T', 6201, 9687], ['k', 5835, 2739, 'b', 1249, 'T', 8059, 6331, 3427, 417, 'N', 'h', 'q', 'U', 'n', 'k', 't', 'm', 'L', '2313', '5885', 'W', '9357', 'R', '2155', 'g', 'E', 'G', '9247', '8349', '1291', 's', '3501', 's', '9777', '9965', '6443', 'h', 'z', 'j', 9683]