In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['i', 'v', 't', 7935, 4603, 6395, 5191, 'F', 'L', 'Q', 'f', 'h', 'H', '8291', 'M', '5879', 'L', 'T', '5409', 'c', 'm', '6441', '5217', '1593', '2535', 'J', '7081', 'x', '81', '9263', 'L', 'D', 'P', 1235, 7131, 7181, 'y', 'Q', 'F', 237], ['N', 'P', 'I', 'i', 'T', 'k', 139, 'g', 'U', 'u', 7237, 'e', 'i', 3923, 'F', 'L', 'Q', 'f', 'h', 'H', '8291', 'M', '5879', 'L', 'T', '5409', 'c', 'm', '6441', '5217', '1593', '2535', 'J', '7081', 'x', '81', '9263', 'L', 'D', 'L', 'G', 'o', 'z', 'A', 'P', 'n', 6439]