In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['r', 1325, 6855, 'H', 'z', 'c', 'b', 'U', 5895, '2651', 'f', '5831', '9453', '5633', '8899', 'j', '4033', '2341', '837', '1241', '1747', 'D', '9921', 'W', '9255', '1785', 'U', '3891', '37', '9741', 'f', '8643', 'u', 'c', 2899, 'q', 'X', 'U', 2881, 'Z', 'y', 3211, 'y'], [5719, 'I', 'f', 'L', 'c', 3565, 7151, 'j', 'Q', 'W', 'N', 5195, '2651', 'f', '5831', '9453', '5633', '8899', 'j', '4033', '2341', '837', '1241', '1747', 'D', '9921', 'W', '9255', '1785', 'U', '3891', '37', '9741', 'f', '8643', 'N', 6101, 9201, 727, 'O', 'i', 'p', 'O', 5717, 3231, 3321, 'x', 'o', 1177, 'w', 2835, 8973, 'i', 'X', 2295, 2297]