TASK DEFINITION: In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
PROBLEM: ['i', 2711, 6903, 1929, 2863, 'b', 5091, 'C', 'g', 'O', '3689', 'B', '6851', '605', '811', '8847', 'a', '3649', '5787', 'B', '6611', 'S', 'M', 5859, 'C', 7687, 'N', 1227, 5881, 8139, 'L', 'u', 1299], [4083, 2455, 'q', 'L', 3689, 'l', 'd', 9587, 'I', 'N', 'O', '3689', 'B', '6851', '605', '811', '8847', 'a', '3649', '5787', 'B', '6611', 'S', 'V', 7521, 'F', 3951, 'm', 'E']

SOLUTION: O, 3689, B, 6851, 605, 811, 8847, a, 3649, 5787, B, 6611, S

PROBLEM: [5413, 'T', 'i', 'Q', 'Y', 'H', '2143', 'M', 'p', 'M', 'l'], ['Y', 'p', 'Y', 'H', '2143', 'M', 'A', 5017, 4553]

SOLUTION: Y, H, 2143, M

PROBLEM: [431, 4017, 'R', 'a', 'F', '9581', 'Y', 'f', 'z', 'b', 1235], [4115, 'u', 'g', 'f', 2455, 'a', 'F', '9581', 'Y', 'f', 'z', 'm', 7245, 'I', 7021]

SOLUTION:
a, F, 9581, Y, f, z