In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7551, 'C', 'Y', 1987, 'E', 'f', 6011, 'L', 8827, 'q', 'U', 693, 6003, 'D', 7875, 435, 'W', 'h', 'W', '2945', 'N', 'i', 'p', 'v', '1679', 'E', 'T', '8269', '2803', 'H', 'e', '8431', '9503', '8451', '3397', '5063', 'w', 'Y', 'p', 5721, 's', 1589, 'd', 9151, 5193, 9883, 5917, 481, 'Z', 'I', 'C'], ['a', 6737, 4833, 1457, 'J', 'a', 'W', 'K', 3447, 2581, 7059, 'j', 3311, 'e', 'B', 'V', 1043, 'L', 'V', 8743, 'W', 'h', 'W', '2945', 'N', 'i', 'p', 'v', '1679', 'E', 'T', '8269', '2803', 'H', 'e', '8431', '9503', '8451', '3397', '5063', 'w', 'c', 'l', 19, 1395, 659, 3129]