Task: Program Execution
Input (English): 3, 9, ['7341', 'm', '1607', 'U', 'S', 'N', 'v', '3363', 'U', 'b', '9121', 'U', '6397', '9355', '3557', '4773', '6345', '4381', '8867', '6649']
Output (English): U3363vNSU1607