Task: Program Execution
Input (English): T, 4221, 2925, 8943, 4567, 1173, 5095, 673, e, H, h, i, Q, 8409, 1845, U, h, 7441, f
Output (English): T, e, H, h, i, Q, U, h, f, 4221, 2925, 8943, 4567, 1173, 5095, 673, 8409, 1845, 7441