Task: Program Execution
Input (English): 2, 4, ['H', 'l', '7721', 'D', '2011', '211', '1115', '8051', '3231', '2999', '527', '447', '8043', '1967', 'g', '8463', '6279', '9211', '1231', 'z']
Output (English): 7721