Task: Program Execution
Input (English): 7443, 1279, s, K, 4657, 1289, O, v, 8203, 3857, Q, 4659, 9789, 6671, U, 3203, X, I, E, 8839, 7473, 1499, 9591
Output (English): s, K, O, v, Q, U, X, I, E