In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['l', 7409, 9193, 'o', 441, 7765, 'K', 'W', '2651', '4573', '521', '413', 'f', 'a', 'q', '6017', '5963', 'y', 'n', 'L', 7031, 8617, 8057, 'k', 'W', 2371, 'C', 9647], [2867, 'k', '2651', '4573', '521', '413', 'f', 'a', 'q', '6017', '5963', 'y', 'f', 2379, 'K', 'i']