Task: Program Execution
Input (English): 8, ['N', 'y', '3721', 'g', 'f', '6043', 's', '4685', 's', 'B', 'N', 'e', '4175', 'C', '2495', '3717', 'Q', '2067', 'R', 'a', '7337', '4065', 'C', 'H', 'O']
Output (English): N, s, Q, O