Task: Program Execution
Input (English): 3, 4, ['z', '2751', '3065', 'H', 'g', 'J', 'B', '3557', 'c', '651', '3391', '423', '5143', '5223', 'M', '8461', '7777', 'b', '7279', '4967', '7923', 'd']
Output (English): H3065