In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['C', 'u', 'k', 7187, 'D', 'b', 'B', 'i', '8697', '2045', '2659', 'b', '7653', '3125', '7661', 'g', '2095', 'r', 'p', 'r', '11', '1907', '9221', 'Q', 'X', 'V', 'u', 5249, 't', 'I', 7977, 'B', 6871, 'c', 'G'], [2861, 'M', 'b', 'K', 'i', '8697', '2045', '2659', 'b', '7653', '3125', '7661', 'g', '2095', 'r', 'p', 'r', '11', '1907', '9221', 'b', 4613, 's', 391, 'n', 5441, 9321, 7537, 'a', 2419, 4809, 9737, 3215, 4027, 'A']