Task: Program Execution
Input (English): 21, 30, ['6469', '8717', 'L', 'X', '4715', '7595', '6757', '2935', 'B', '5035', 'j', 'X', '4897', '7607', '1621', '8217', 'd', 't', '183', 'm', '6453', 'M', '8871', 'l', '9347', 'P', '9341', 's', 'm', 'U']
Output (English): Ums9341P9347l8871M6453