In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1699, 5363, 'U', 3351, 'K', 1771, 8981, 'y', 4317, 'P', 'H', 'f', 'j', '7169', '129', 'Z', 'K', 'r', 'o', 'v', '1713', 'g', 'A', 'h', 'e', '421', 'a', 'b'], [1477, 'o', 'h', 4413, 'Y', 'V', 4539, 't', 'S', 3527, 9183, 9541, '7169', '129', 'Z', 'K', 'r', 'o', 'v', '1713', 'g', 'A', 'h', 'e', '421', 'j', 'V', 8579, 3395, 'l', 'X', 'l', 'm', 4239]