In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[5425, 3015, 737, 'i', 2435, 6417, 'x', 'D', 'D', 'l', 'f', 3235, 'L', 'L', 'V', 'h', 'W', 'j', '1075', '6255', '8137', '7499', '10003', '1467', '6019', 'c', 'c', 2873, 'R', 'D', 'L', 'L', 'x', 'f'], [2879, 'H', 5987, 8311, 9957, 'y', 5455, 2047, 7379, 'o', 7025, 'L', 'L', 'V', 'h', 'W', 'j', '1075', '6255', '8137', '7499', '10003', '1467', '6019', 'P', 9075, 2053, 1127, 'X', 6963, 7767, 309, 'U']