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

[6917, 7141, '3657', '9205', 'b', 'm', 'Q', 'g', 'q', 'l'], [1429, 7173, 3447, '3657', '9205', 'b', 'm', 'Q', 'U', 'f']
3657, 9205, b, m, Q

['s', 'J', 2223, 'y', 'v', '9315', '8837', 'z', '8583', 'o', 'c', 'V'], ['E', 5699, 1225, 'f', '9315', '8837', 'z', '8583', 'o', 'u', 'j']
9315, 8837, z, 8583, o

[3711, 2275, '1409', '7691', 'I', 'Y', '2147', '8665', '7929', 'z', 'x', '2407', 'y', 'Z', '1457', 'B', 'w', 'P', 'c', 'l', 'U', 9471], ['v', 'z', 3635, '1409', '7691', 'I', 'Y', '2147', '8665', '7929', 'z', 'x', '2407', 'y', 'Z', '1457', 'H', 5729, 'p', 'i', 'S', 4131]

1409, 7691, I, Y, 2147, 8665, 7929, z, x, 2407, y, Z, 1457