In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6495, 'H', 6143, 'O', 'Y', '4489', '1041', '5407', '5701', 'l', '7955', 'A', 'U', '5621', 'H', 'l', 1467], [4923, 5915, 1741, 'q', 9231, 't', 'K', 1399, 'm', 185, 'Y', '4489', '1041', '5407', '5701', 'l', '7955', 'A', 'U', '5621', 'F', 'g', 'A', 843, 1089, 'O', 'N', 9037, 9915]