In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7553, 'P', 407, 'M', 'O', 8777, 'd', 'T', '9407', '6357', '607', 'y', 'a', 'S', '5859', '1083', '1149', 'K', 's', 'i', 'Y', 2609, 2779, 7715, 'P', 'A', 'A', 3481, 'o'], [7903, 'Z', 'H', 6305, 8357, 'n', 'H', 'K', 'V', 4173, 'd', 'T', '9407', '6357', '607', 'y', 'a', 'S', '5859', '1083', '1149', 'K', 'J', 'A', 7631, 'G', 9857, 'H', 'v', 275, 7059]