Task: Program Execution
Input (English): 7, ['u', '2013', '2023', '5491', '8161', '1921', 'M', 's', 'K', '1237', '8909', '6549', '593', 'F', 'k', 'J', 'n', 'E', '8773', 'o', '7367', 'v', 'm', '355']
Output (English): u, s, k, v