In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['t', 'f', 3791, 2099, '3895', '5725', '7743', '9219', 'c', '6319', '3099', '3601', 'a', '2943', '2543', '51', 'r', 'w', '2379', '5423', '5807', 'l', 'b', 'f', 'i', 2371, 'W', 'c', 'c', 'l', 5505, 'L', 'w', 'a'], ['s', 5505, 'h', 4601, 4713, 6191, 't', 9213, 'D', 1777, 'E', '3895', '5725', '7743', '9219', 'c', '6319', '3099', '3601', 'a', '2943', '2543', '51', 'r', 'w', '2379', '5423', '5807', 'l', 'v', 5275, 'C', 'Y', 3371, 7105, 411, 'f', 8409]