In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9181, 'y', 'U', 4117, 'I', 2215, 'T', 1497, 'b', '689', '5065', '8401', 'D', '6949', '2197', 'r', '9933', '3513', 'U', 6357], [5939, 2135, 4351, 'a', 6299, 1417, 3609, 8181, '689', '5065', '8401', 'D', '6949', '2197', 'r', '9933', '3513', 'b', 2819, 8577, 'Z', 'R', 'G', 7917, 'W']