In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[447, 4245, 2287, 2709, 'E', 8831, 'z', 'T', 1623, 'O', 'r', 6883, 1077, 1091, 'R', 'F', 'X', 'k', 'X', 't', 'F', 'l', 'P', 7633, 1081, 'Y', 'Z', 'j', 'V', 'H', '3249', 'c', '5187', '3763', 'g', '1763', 'b', 'C', 'U', '6601', '105', '2059', '1383', '5237', '431', '1595', '997', '3917', '4307', '1523', 'J', 'u', 'k', '1533', '1599', 'y', 'U', 'r', 5011, 'n', 8525, 'C', 'W', 3915, 3349, 'n', 'E', 4155, 'Q', 7845, 'n', 5119, 3433, 4387, 7367, 8053, 'x', 3001, 'a', 'T', 'l', 885, 3649, 'u'], ['s', 'q', 'J', 'V', 'H', '3249', 'c', '5187', '3763', 'g', '1763', 'b', 'C', 'U', '6601', '105', '2059', '1383', '5237', '431', '1595', '997', '3917', '4307', '1523', 'J', 'u', 'k', '1533', '1599', 'y', 'Z', 7459, 9909, 6341, 'o', 'E', 'd', 'q', 'h', 4715, 5089, 'o', 'A', 8033, 6267, 6459, 'U', 6913, 'a', 563, 2573, 5567, 9129, 8301, 1515, 8197, 'i']