In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
--------
Question: [6921, 9035, 1815, 'T', 7393, 6607, 'D', 'c', 293, 'U', 4409, 4737, 3515, 'I', 'a', '839', 'q', 'n', '2571', '5999', 'L', 'k', '9745', '9023', '7365', 'C', '2893', 'n', '7783', 'E', '5071', 'Z', '3647', 'f', '7281', '8791', 'U', 't', '3969', '2029', 'i', 'o', 'a', 'M', 7035, 'v', 4907, 'l', 9767, 9189, 6353, 2883, 'F', 'x', 7665, 6801, 'x', 'J', 'G', 5361, 'f', 'Y', 'u', 'K', 'c', 1779, 1115], [587, 779, 525, 'i', 's', 4247, 5713, 'I', 'a', '839', 'q', 'n', '2571', '5999', 'L', 'k', '9745', '9023', '7365', 'C', '2893', 'n', '7783', 'E', '5071', 'Z', '3647', 'f', '7281', '8791', 'U', 't', '3969', '2029', 'i', 'u', 4957, 'c', 'k', 5231, 'i', 'T', 'q', 'd']

Answer: I, a, 839, q, n, 2571, 5999, L, k, 9745, 9023, 7365, C, 2893, n, 7783, E, 5071, Z, 3647, f, 7281, 8791, U, t, 3969, 2029, i


Question: [621, 7677, 'b', '889', '6721', 'H', 'd', 'S'], [8151, 'F', 'b', '889', '6721', 'h', 4123]

Answer: b, 889, 6721


Question: [5083, 'i', 9255, 'v', 'j', 'r', 7493, 1397, 5365, '3987', '7757', '1937', '8601', '9721', '5723', '1583', 'Y', '3409', 'F', 'X', 9157, 'd', 'f'], ['h', 21, 4833, '3987', '7757', '1937', '8601', '9721', '5723', '1583', 'Y', '3409', 'p', 6017, 'U', 8717, 6905, 'E', 'q', 'Z', 3315]

Answer:
3987, 7757, 1937, 8601, 9721, 5723, 1583, Y, 3409