Task: Program Execution
Input (English): 15, 16, ['1829', '2905', 'g', '3969', 'N', '8721', 'i', '6893', 'l', '8695', '9717', 'I', '3203', 'G', 'b', '671', '7581', 'S', 'J', 'V', '3443', '3591', '1679', '1829']
Output (English): 671b