In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1683, 4971, 'C', 'u', 'h', 'A', 'b', 901, 7649, 3119, 3545, 9801, 8353, 8975, 7761, 'j', 4353, 8887, 3473, 8613, 6755, 9855, 'i', 503, 'I', '5301', 'n', 'o', '2845', 'a', 'M', '9185', 'E', '4393', 'P', '1337', '669', 'o', 'g', 'U', '3339', 'V', 'T', '4075', '7781', 'j', '5013', 'F', '3107', 'K', '3139', 'O', 'r', 'H', 'A', 7069, 73, 1423, 'd', 'H', 3643, 2389, 'l', 9743, 't', 9597, 'e', 5585, 'r', 'r', 'q', 'r', 5389], [7713, 5425, 'x', 'u', 315, 5315, '5301', 'n', 'o', '2845', 'a', 'M', '9185', 'E', '4393', 'P', '1337', '669', 'o', 'g', 'U', '3339', 'V', 'T', '4075', '7781', 'j', '5013', 'F', '3107', 'K', '3139', 'O', 'r', 'f', 435, 9067, 887, 7363, 'U', 7949, 'w', 8629, 'u', 9131, 'H', 9599, 'U', 5829, 'u', 859, 'n', 6225, 'X', 'f', 'r', 5729, 'u', 7267]