Task: Program Execution
Input (English): 1, 15, ['8961', 'l', 'M', '7525', '6349', 'd', '2781', '2827', '4083', '6239', '8273', '8367', '2027', 'J', '2789', '8559']
Output (English): 2789J2027836782736239408328272781d63497525Ml8961