Task: Program Execution
Input (English): 1, ['Z', '2015', 'F', '5145', '7403', '5773', '2787', '9813', 'a', '7047', 'g', '1123', '5985', 'H', 's', '8255', '103', '9771', 'p', '8973', 'g']
Output (English): Z