In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 3507, 9283, 'b', 7379, 3323, 'M', 8701, 'B', 'b', 'A', 9563, 8303, 1291, '923', 'i', 'h', '1951', 'E', 'H', 'k', '407', 'f', 'N', 'l', 'v', '7771', 'u', '9719', '7137', 'e', 'C', 'Y', 7563, 'A', 'R', 'Z', 'B', 9749, 4029, 'D', 'e'], ['j', 'D', 'c', 'F', 'Z', 6285, 'b', 1505, 't', 8147, 'D', 'k', '923', 'i', 'h', '1951', 'E', 'H', 'k', '407', 'f', 'N', 'l', 'v', '7771', 'u', '9719', '7137', 'e', 'C', 'O', 3939]