In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.

[Q]: [4339, 'i', 7857, 315, 'W', '3573', '689', 'y', '9557', 'J', 'b', '2185', 'i', 7649, 'F', 'g', 6973], ['r', 5097, 5467, 't', 'N', 'Y', 'W', '3573', '689', 'y', '9557', 'J', 'b', '2185', 'l', 837, 643, 2055, 'J', 'I']
[A]: W, 3573, 689, y, 9557, J, b, 2185


[Q]: [5451, 't', 'Q', 5199, 'A', 'P', '5961', '133', 'Q', 'V', '7547', '899', '6027', '439', 'u', 'l', 'o', 9943, 'b', 'm'], [1925, 'Q', 'D', '5961', '133', 'Q', 'V', '7547', '899', '6027', '439', 'H', 3347]
[A]: 5961, 133, Q, V, 7547, 899, 6027, 439


[Q]: [2393, 'b', '2147', 'g', 'O', 'b', 'Q', 'R', 5117, 'R'], ['y', 5769, 4173, 'X', '2147', 'g', 'O', 'b', 5221, 'c']
[A]:
2147, g, O, b