In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['S', 'R', 'W', 'h', 'f', 2375, 6781, 'A', 1517, '2387', 'Z', 's', '5939', 'm', '7657', '1489', 'y', '4329', 'W', 'L', 'S', 387, 3061, 'n', 'Z'], ['k', 6973, 'U', 'b', 1033, 'y', 'E', 'z', '2387', 'Z', 's', '5939', 'm', '7657', '1489', 'y', '4329', 'h', 'C']