In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['C', 'h', 'o', 'a', 'Q', 6853, 'W', 'w', 'B', 1179, 3993, 8605, 5537, 1003, 837, '2515', 'Y', '8327', 'n', '4229', 'F', 'x', '227', '2175', '609', 'h', 'i', '3117', 'O', '25', 'I', '6439', '8905', 'x', 'd', '4655', 'S', 'b', 'I', '879', '4247', 'Q', '8333', 'Z', 'x', 1389, 'p', 4371, 4855, 807, 'G', 'u', 'G', 'G', 'Z', 's', 'P', 's', 4587, 'R'], [2429, 8021, 3945, 'E', 671, 4701, 8985, 8205, 'B', 1381, 1699, 7897, 2401, 'a', 8623, 'N', 6805, 6065, 'N', 4109, '2515', 'Y', '8327', 'n', '4229', 'F', 'x', '227', '2175', '609', 'h', 'i', '3117', 'O', '25', 'I', '6439', '8905', 'x', 'd', '4655', 'S', 'b', 'I', '879', '4247', 'Q', '8333', 'Z', 'N', 4549, 'd', 'c', 8413, 4297, 'n', 'e', 'I', 'C', 'j', 'j', 'S', 9053, 6503]