In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['C', 4631, 'z', 6691, 4667, 'U', 4793, 'n', 1951, 5567, 'l', '5407', '2233', 'm', 'j', 'K', '7419', 'Q', 'j', '8907', '6331', '2267', '9839', 'K', 'n', 'n', 'X'], [531, 1535, 3393, 6011, 5267, 8301, 'R', 'B', 'l', 8019, '5407', '2233', 'm', 'j', 'K', '7419', 'Q', 'j', '8907', '6331', '2267', '9839', 'K', 'R', 5659, 'U', 'E', 'I', 8877, 2419]