TASK DEFINITION: In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
PROBLEM: [2255, 4205, 'U', '7567', 'k', 5167], ['Q', 9439, 'U', '7567', 'H', 1307]

SOLUTION: U, 7567

PROBLEM: [4817, 'A', '3155', 'W', 'm', 4061], [7701, 'P', '3155', 'W', 't', 'J']

SOLUTION: 3155, W

PROBLEM: ['f', 8855, 'N', 8821, 10001, 6833, 'R', 'I', 1167, 87, 'Y', 'H', 673, '4021', 'S', '3407', 'z', '895', 'j', '9897', 'U', '3747', 'S', 'p', 'v', 'y', 'c', 'd', 'U', 143, 'k', 9757, 943, 'C', 'q', 'u', 'n', 1545, 941], ['T', 7625, 'Y', 'j', 'O', 3075, '4021', 'S', '3407', 'z', '895', 'j', '9897', 'U', '3747', 'S', 'p', 'v', 'y', 'v', 'D', 'g', 'o', 'O', 2255, 'a', 5303, 569, 5721, 'S', 5411, 'E']

SOLUTION:
4021, S, 3407, z, 895, j, 9897, U, 3747, S, p, v, y