TASK DEFINITION: In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
PROBLEM: [6137, 1795, 'J', 9247, 'r', 'w', 'E', 's', '687', 'N', '8213', '1751', '2567', '5673', 'y', '6821', '6863', '8847', 'z', 's', 'N', 'z', 'J', 7209, 'S'], [3317, 657, 3971, 8789, 4953, 9693, 'O', 7845, 'r', 'w', 'E', 's', '687', 'N', '8213', '1751', '2567', '5673', 'y', '6821', '6863', '8847', 'z', 's', 'N', 'z', 'M', 'A', 'B', 'l']

SOLUTION: r, w, E, s, 687, N, 8213, 1751, 2567, 5673, y, 6821, 6863, 8847, z, s, N, z

PROBLEM: ['t', 845, 'T', '5285', '7837', 'N', 6717], [7211, 7903, 'U', 'T', '5285', '7837', 'D', 'U', 'R']

SOLUTION: T, 5285, 7837

PROBLEM: [3417, 'Z', '4665', '2203', '4399', '9963', '9459', 'p', '2697', 'X', 'I', 'h', 'H', 'S', 'f', 9703, 'M', 9239, 'r', 5613, 6471, 2687], ['Y', 'D', 'K', 'a', 'I', 't', '4665', '2203', '4399', '9963', '9459', 'p', '2697', 'X', 'I', 'h', 'D', 8463, 149, 'F', 8507, 9791, 'j', 2403]

SOLUTION:
4665, 2203, 4399, 9963, 9459, p, 2697, X, I, h