In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[901, 'l', '4509', '5969', '517', 'T', 'G', '3221', 'E', 'f', 'c', '7993', 'R', 'I', 'g', 'R', 'r', 1103, 9941, 'A', 'b'], [9075, 'z', 'w', '4509', '5969', '517', 'T', 'G', '3221', 'E', 'f', 'c', '7993', 'R', 'I', 'G', 245, 865, 'x', 2117, 'G', 'w', 'Q', 6337, 'I', 'B']