In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4661, 3473, 6317, 1613, 6915, '7479', '3929', '3109', '9161', '9817', '3825', '4369', 'T', 'y', '9177', 'x', 'U', 'i', 773, 'j', 5515, 4513], [3897, 9171, 'b', 6307, 'k', '7479', '3929', '3109', '9161', '9817', '3825', '4369', 'T', 'y', '9177', 'y', 'P', 'j', 2095, 'G', 2435]