Task: Program Execution
Input (English): 7, 8, ['m', 'C', 'X', 'S', '5609', 'R', '8407', 'R', 'x', 'l', '9039', '9369', '1683', 'V', '6685', 'r', '1531', '7771', 'h', '999', '3435', 't']
Output (English): 8407