In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 'K', 6415, 't', '957', '7669', '1935', '3175', 's', 'E', 'o', 'A', 5513, 4961, 1673], ['I', 7369, 6787, 'S', 6731, 'X', 9167, 't', '957', '7669', '1935', '3175', 's', 'E', 'o', 'r', 6467, 11, 'r', 'y', 417]