Task: Program Execution
Input (English): 16, 21, ['4235', '9403', 'f', '5401', '1973', '65', 'n', '3935', 'p', 'c', '1651', '7315', 'U', '8227', 'N', '2067', 'Y', '8227', '2199', 'U', '2607', 't', '245', 'Y', 'Z', '5609', 'n', '8297', '7571']
Output (English): 7062U99127228Y7602