In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['H', 'J', 7273, 4609, 'X', 1459, 'X', 103, 'k', 'Y', 9959, 'f', 1833, 1407, 6879, 7035, 'R', 2733, 'z', 9473, 'W', 'F', 'T', 'S', 'c', '1501', '993', '2163', 'l', 'P', 'C', 'Y', '2675', '9095', 'o', 'd', '2073', 's', 'm', '5179', 'M', '2097', '4943', '5555', '535', 'S', '5419', '9789', '4317', 'q', 't', 'M', 5159, 'g', 5551, 1869, 2597, 'n', 'z', 7671, 'L'], ['g', 'u', 8517, 205, 'T', 'S', 'c', '1501', '993', '2163', 'l', 'P', 'C', 'Y', '2675', '9095', 'o', 'd', '2073', 's', 'm', '5179', 'M', '2097', '4943', '5555', '535', 'S', '5419', '9789', '4317', 'q', 't', 'l', 4069, 'A', 'Z']