In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['X', 'L', 427, 247, 5039, 'z', 8709, 'o', 845, 8803, 'T', 129, 'X', 'G', 8801, 6311, 'y', 'z', 'T', 4319, 4527, 1855, 1835, 'W', '8821', '623', 'u', 'K', '873', 'f', 'x', '4739', 'p', '2921', '8215', '8661', 'q', 'z', 'U', '5461', 'c', 'q', '6473', 'I', 'T', 'M', 'c', 1569, 3839, 'U', 8023, 7091, 'm', 'o'], ['R', 'h', 'a', 6805, 'Q', 'X', 4801, 'W', '8821', '623', 'u', 'K', '873', 'f', 'x', '4739', 'p', '2921', '8215', '8661', 'q', 'z', 'U', '5461', 'c', 'q', '6473', 'I', 'T', 'M', 'D', 9875, 'z', 'w', 'P', 'K', 'Q', 9875, 'R', 'Q', 1281, 3205, 7047, 8081, 't', 6263, 2763, 6323]