In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['A', 9297, 'I', 'W', 'x', 8443, 727, 'b', 'y', 'F', '4011', '3507', 'U', 'a', '4549', '1321', 'B', '4267', 'p', 'v', '9589', 'l', 'n', '6429', '1141', '751', '2447', 'C', '8973', 'e', 'r', 'v', 'W', 1255, 6663, 8233], ['W', 1465, 5617, 'L', 'l', 'p', 6403, 545, 6577, 'n', 'E', 'Z', '4011', '3507', 'U', 'a', '4549', '1321', 'B', '4267', 'p', 'v', '9589', 'l', 'n', '6429', '1141', '751', '2447', 'C', '8973', 'j', 'B', 305, 6479, 751]