Task: Program Execution
Input (English): 6, ['X', 'D', 'O', 'c', '1973', 'z', 'm', 'O', 'U', 'N', 'x', 'h', 'S', 'k', '7629', '9209', '4619', 'z', 'K', '5331', 'C']
Output (English): X, m, S, K