In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['u', 6123, 9891, 2455, 9689, 3347, 'u', 6267, 'r', 7253, 'q', 9599, 'q', 'Q', 'z', '5311', '3959', 'F', '2317', 'R', '7431', '8135', 'C', 'N', '703', '79', 'm', '2921', '5561', 'F', 'r', 'f', 's', 'q', 'k', 'z', 'T', 'k', 'b', 4239, 91, 'A', 'u', 'X', 7693, 1021, 'Q', 'n'], ['J', 1097, 8625, 'z', 'Z', 217, 5729, 'z', 'Z', 'Z', 1929, 6861, 'K', 'g', 6757, 'u', 3693, 1669, 'M', 2123, 1585, 'w', 'Q', 'z', '5311', '3959', 'F', '2317', 'R', '7431', '8135', 'C', 'N', '703', '79', 'm', '2921', '5561', 'F', 'r', 'f', 's', 'q', 'k', 'd', 5773, 'b']