In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1947, 9047, 'P', 's', '8023', '125', 'e', '3381', 'S', '6069', '531', '8221', 'j', 'm', '151', 't', '9959', '8301', 'z', 'a', 'O', 'Q', 3839, 's', 'K', 'K', 1613, 2041, 6105, 4069, 8073, 'l', 'B'], ['K', 'V', 'f', 6899, 'y', 'v', 4179, 6777, 'd', 'E', 'V', 'O', 5229, '8023', '125', 'e', '3381', 'S', '6069', '531', '8221', 'j', 'm', '151', 't', '9959', '8301', 'z', 'a', 't', 'Q', 'E', 'H', 3801, 'o', 'C', 'i']