In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8815, 7909, 'q', 'V', 'R', 3943, 9219, 7707, 6329, '2209', '4969', 'r', '3333', '2461', 'W', '9487', 'f', 'K', 'I', 'C', 'K', '121', 'L', 'v', 2669, 6575, 6167, 'M', 8811, 2093], ['L', 7993, 5387, 2479, 6395, 5317, 's', 2879, 'u', 897, '2209', '4969', 'r', '3333', '2461', 'W', '9487', 'f', 'K', 'I', 'C', 'K', '121', 'L', 'H', 'P', 'g']