In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['c', 'R', 'f', 6653, 8947, '2357', '1879', 'q', '7661', '4337', 'r', 'N'], [957, 'Q', 'm', 'E', '2357', '1879', 'q', '7661', '4337', 'W', 'S', 'S', 'G']