In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7785, 'L', 8127, '8687', 'I', '1971', 'z', 'X', 'Y', 'f', '8843', 'd', 'N', 1423, 8523, 6599, 'V', 2689, 7457, 'e'], ['j', 9953, 'N', 9563, 'E', 1109, 'u', 'C', '8687', 'I', '1971', 'z', 'X', 'Y', 'f', '8843', 'd', 'z', 'k', 'o', 1169]