In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['l', 8121, 'W', 'f', 849, 'B', 1533, 5829, 'd', 's', 8437, 'T', 2535, 'M', 4311, '6937', 'f', 'j', 'J', 'y', 'b', 'j', 'G', '6393', 'm', '7129', '3189', '1379', '4267', '4715', '507', 'Y', '7711', '987', '8457', '9053', '7635', '311', '1479', 'j', 'r', 5171, 'r', 'q', 'G', 1735, 9789, 5669], ['Z', 'a', 5083, 4175, 'l', 5731, 'Q', 'K', 6919, 'j', '6937', 'f', 'j', 'J', 'y', 'b', 'j', 'G', '6393', 'm', '7129', '3189', '1379', '4267', '4715', '507', 'Y', '7711', '987', '8457', '9053', '7635', '311', '1479', 'Y', 'q', 'B', 'O', 5239, 'M', 7865, 'o', 'E', 3867, 'i', 941, 7955, 't', 3345, 3423, 'Y', 'O', 8491, 7837, 9367]