Task: Program Execution
Input (English): 3, 7, ['5', '2867', '573', '6473', '9691', '5145', 'K', '5751', '4369', '8637', '467', '3535', '7109', 'I', 'O', '1687', 'P', 'H', '5081', 'j']
Output (English): K514596916473573