In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7391, 2293, 6555, 9633, 'm', 'B', 'E', '1381', '6217', '6287', '2573', '8857', 'm', 'Y', '5971', 'd', '8973', 's', '1515', 'i', '9535', '2219', 'x', 'J', '7263', '4443', '9271', 'l', '693', 'K', 'a', 'T', 'X', 'y', 'T', 287, 'W', 9459, 'I'], [6209, 4497, 'B', 'E', '1381', '6217', '6287', '2573', '8857', 'm', 'Y', '5971', 'd', '8973', 's', '1515', 'i', '9535', '2219', 'x', 'J', '7263', '4443', '9271', 'l', '693', 'd', 8049, 'A', 6441, 'S', 8821, 8319, 3541, 8379, 'V', 'r', 611, 'd', 485, 2199, 'p', 8591, 'U', 'y']