In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['s', 'p', '10019', '4191', '4043', 'L', 'q', '5357', 't', 'S', 'z', 'K', '9051', 'j', 'F', 'R', 2739, 343, 'N', 'U', 909, 1899, 'K', 'q', 'f'], ['s', 1211, 'K', 'm', 'e', 'e', 'a', 'g', '10019', '4191', '4043', 'L', 'q', '5357', 't', 'S', 'z', 'K', '9051', 'j', 'F', 'p', 'M', 'o']