TASK DEFINITION: In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
PROBLEM: [8471, 8309, 'g', 'f', 5019, 'd', 8129, 'r', 'e', 'l', 'B', '7297', 'c', '2785', '919', 'B', '5459', 'L', 5985, 2953, 6897, 'n', 9209, 3281, 'w', 4011, 't'], ['g', 7529, 'q', 6213, 'c', 'l', 6053, 'r', 'e', 'l', 'B', '7297', 'c', '2785', '919', 'B', '5459', 'B', 2159, 7633, 8707]

SOLUTION: r, e, l, B, 7297, c, 2785, 919, B, 5459

PROBLEM: [2255, 4205, 'U', '7567', 'k', 5167], ['Q', 9439, 'U', '7567', 'H', 1307]

SOLUTION: U, 7567

PROBLEM: [3639, 'f', '9341', '5369', 'n', 'k'], ['H', 5241, '9341', '5369', 'd', 'h']

SOLUTION:
9341, 5369