In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 'y', 'W', 'A', 2387, 8905, 6899, 8957, 'V', 'L', 9523, 8581, 'Z', 'K', 'Z', 'P', 'L', 8141, 9, 'e', '5859', '2879', 'a', '187', '7817', '4809', '371', '8167', '5195', '1393', 'I', '7561', '6451', 'l', 'b', 'U', '3775', '7271', '9577', 'c', '5999', 'M', 'H', 'l', '8557', 'A', '199', 'W', 'n', 'B', 'r', 5487, 6053, 469, 4709], ['B', 'j', 1733, 'k', '5859', '2879', 'a', '187', '7817', '4809', '371', '8167', '5195', '1393', 'I', '7561', '6451', 'l', 'b', 'U', '3775', '7271', '9577', 'c', '5999', 'M', 'H', 'l', '8557', 'A', '199', 'W', 'R', 7093, 'l', 'V', 'H', 'u', 6081, 3719, 'Y', 601, 2569, 'L', 4669, 7447, 8333, 'P', 6689, 5987, 'K']