In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[713, 9645, 'J', 1317, 'u', 'w', 'H', '7621', '9951', 'B', 'i', 's', '4055', 'I', 'I', '5409', 'k', '1945', 'C', 'Y', '5061', 'v', 1509, 'a', 9433, 'A', 3305, 'S', 6079, 3027, 3671, 6721, 4751, 'm', 'E', 7221, 'i'], ['S', 'y', 2989, 'o', 'D', 6351, 9943, 'w', 'H', '7621', '9951', 'B', 'i', 's', '4055', 'I', 'I', '5409', 'k', '1945', 'C', 'Y', '5061', 'W', 'g', 8765, 8133, 3477, 1985]