In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2611, 6809, 5059, 's', 'i', 'f', 'R', 'O', 'l', '1903', 'S', '3547', 'j', '99', 'S', 'h', 'F'], [2809, 5085, 'j', 'O', 'l', '1903', 'S', '3547', 'j', '99', 'g', 4405, 'K', 4097, 3169, 5281, 'k']