Task: Program Execution
Input (English): 18, 19, ['m', '371', '4111', '8217', 'A', 'Y', 'T', 'u', 'g', '5469', '6859', '1159', '9803', '3195', 'Q', '5475', 'O', '1865', 'R', '6629']
Output (English): R1865