In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['u', 'r', 849, 'R', 'F', 'T', '8517', 'n', 'W', '7945', '6371', 'l', 'S', 'G', '7431', 'x', 'b', 'B', '437', '9051', 'p', '465', 'u', 'R', 'p', 'p', 'T', 'z', 'q', 'I', 435, 'f', 5345, 7911, 'A', 4969, 'Z', 'z', 'g', 'F', 'j', 'p', 8691, 'W', 'g'], ['O', 'A', 'Y', 7777, 1037, 637, 'X', 3059, 1375, 1443, 1615, 9593, 'D', 'R', 'S', 'M', 5927, 'R', 'F', 'T', '8517', 'n', 'W', '7945', '6371', 'l', 'S', 'G', '7431', 'x', 'b', 'B', '437', '9051', 'p', '465', 'u', 'R', 'p', 'Q', 'Y', 1371, 'M', 'Q', 1545, 4395, 'm', 'R', 6291, 'g', 'X', 5919, 'p', 'V', 'Y', 'N', 1117, 'U']