Task: Program Execution
Input (English): 7, 15, ['U', 'B', '7407', '5247', 'J', '1867', '6067', '8005', 'R', 'y', 'S', 's', 'Q', '2817', 'Y', '469', 'J', '807', '5931', '2997', 'Z', '5805']
Output (English): Y2817QsSyR80056067