In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['Q', 'N', 6967, 'k', 'Y', '6329', 'I', '2451', 'r', 'V', '9661', '1283', '7053', 'g', '829', '1011', 'y', '1181', '6379', 'n', 'T', '7277', 'O', '5127', 'W', '309', '5071', 'P', 'd', 'l', 'f', 'v', 'N', 'K', 'y', 6649, 'L', 'd', 'U'], ['F', 'D', 'F', 3479, 'd', 'T', 'o', 4313, 6347, 4623, 3945, 'M', 3919, 6947, 'k', 'Y', '6329', 'I', '2451', 'r', 'V', '9661', '1283', '7053', 'g', '829', '1011', 'y', '1181', '6379', 'n', 'T', '7277', 'O', '5127', 'W', '309', '5071', 'P', 'B', 'K', 5599, 8283, 'G', 'r', 'P', 'f', 'b', 1673, 'i', 'z', 'Y', 2541, 5285, 3905, 'C', 657, 'I', 6303, 't']