In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 4799, 7437, 8155, 'g', 'B', 't', 'F', 3147, 1503, '403', 'E', '8293', '9057', '5657', '749', 'H', '1323', 'A', '3391', 'S', '7749', 'H', '8031', '6077', '9633', 'K', 'j', 7097, 'I', 4533, 'O', 'W', 'K', 5331, 'a', 'f', 9761, 'a', 'Y', 6355], ['A', 3767, 'F', 2813, 2747, 'U', 'V', 'T', 'a', 'b', 'k', 'f', 2755, '403', 'E', '8293', '9057', '5657', '749', 'H', '1323', 'A', '3391', 'S', '7749', 'H', '8031', '6077', '9633', 'i', 't', 9417, 'Y', 7769, 8551]