In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[891, 'D', 'O', 3569, 1679, 967, 57, 'D', 'O', 871, 3929, 'P', 'f', 4079, 'p', 2649, 'u', 2247, 8577, 'i', 'J', 'k', '8107', '3147', 'w', '8781', '603', 'z', 'q', 'R', 'V', 'h', 'g', 'b', '7799', '2347', '6587', '7155', '8787', 'T', '1267', 'z', 'p', '285', '4367', 'y', '4021', 'P', 'u', 'h', 'E', 5209, 4083, 'M', 9927, 8141, 'b', 's', 'B', 6023, 3939, 9415, 8341, 'h', 5475], ['Z', 4693, 'q', 9731, 'o', 'J', 'k', '8107', '3147', 'w', '8781', '603', 'z', 'q', 'R', 'V', 'h', 'g', 'b', '7799', '2347', '6587', '7155', '8787', 'T', '1267', 'z', 'p', '285', '4367', 'y', '4021', 'P', 'u', 'Y', 'C', 1949]