TASK DEFINITION: In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
PROBLEM: ['R', 't', 'y', '2887', 'x', 4883], [5691, 9457, 'y', '2887', 'u', 'Y']

SOLUTION: y, 2887

PROBLEM: [2185, 'H', 9933, 6987, 'l', 'N', 3787, 'H', 'K', 'X', 'I', '8517', 'a', 'M', 'e', '7443', '185', '6897', '8395', '3867', '4671', 'e', '2031', '877', 'T', '735', '1273', 'd', '7757', '2005', 't', 8763, 2723, 457, 8941, 9919], [2819, 4477, 'x', 'S', 'D', 1309, 4739, 'B', 'Z', 'K', 7141, 'I', 'x', 6709, 'p', 5629, 'M', 8669, 3157, 5169, 9737, 'Z', 'H', 'K', 'X', 'I', '8517', 'a', 'M', 'e', '7443', '185', '6897', '8395', '3867', '4671', 'e', '2031', '877', 'T', '735', '1273', 'd', '7757', '2005', 'w', 'j', 5143, 6859, 8985, 8441, 'K', 'H', 's']

SOLUTION: H, K, X, I, 8517, a, M, e, 7443, 185, 6897, 8395, 3867, 4671, e, 2031, 877, T, 735, 1273, d, 7757, 2005

PROBLEM: [2089, 8847, 'Q', 9569, 'm', 9285, 2515, 9313, '3029', 'z', '3633', 'u', 't', '4855', '2185', 'R', 'q', '5427', 'y', '3391', '7141', 'e', 2921], ['o', 361, 9109, 8389, 357, 7529, 's', 3639, 2009, 'B', 'j', '3029', 'z', '3633', 'u', 't', '4855', '2185', 'R', 'q', '5427', 'y', '3391', '7141', 'J', 'F', 'I', 5271, 6121]

SOLUTION:
3029, z, 3633, u, t, 4855, 2185, R, q, 5427, y, 3391, 7141