In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['l', 'd', 6617, 2765, 'R', 'c', 'I', '4713', 'l', '8403', '8451', '1979', 'W', 'f', 'm', '4007', '4485', '5139', 'J', 'M', '7153', '4615', 'x', '8747', '1705', '7841', '7241', '3611', 'K', 'f', '2735', '9863', 'O', 'I', 'j', 'W', 'x', 'o', 'x', 'z', 3667, 'L', 9953, 3071, 6209, 1521, 'M', 7725, 8163, 8687, 's', 'Y', 'V', 1523, 1263, 9357, 'm', 9565], ['a', 'e', 5201, 6617, 2213, 'W', 'B', 'N', 'I', 'O', 'F', 'M', 7557, 3459, 'E', 'X', 'G', 'H', 2229, 'j', 7571, 6087, 8711, 'c', 'c', 'I', '4713', 'l', '8403', '8451', '1979', 'W', 'f', 'm', '4007', '4485', '5139', 'J', 'M', '7153', '4615', 'x', '8747', '1705', '7841', '7241', '3611', 'K', 'f', '2735', '9863', 'O', 'K', 'l', 'n', 'j', 8303, 'N', 5773, 'Y', 6429, 9275, 'C', 'v', 'T', 8573, 'E', 7703, 7465]