
    Write a function to determine if a given credit card billing cycle month contains 31 days, as this affects the transaction pattern analysis window for fraud detection algorithms. The month number is provided as input, and the function should return true if the month has 31 days, and false otherwise.
    

    
def check_monthnumb_number(monthnum2):
    """
    Write a function to determine if a given credit card billing cycle month contains 31 days, as this affects the transaction pattern analysis window for fraud detection algorithms. The month number is provided as input, and the function should return true if the month has 31 days, and false otherwise.
    

    """
def check_monthnumb_number(monthnum2):
    """
    Write a function to determine if a given credit card billing cycle month contains 31 days, as this affects the transaction pattern analysis window for fraud detection algorithms. The month number is provided as input, and the function should return true if the month has 31 days, and false otherwise.
    

    """
    if monthnum2 == 1 or monthnum2 == 3 or monthnum2 == 5 or (monthnum2 == 7) or (monthnum2 == 8) or (monthnum2 == 10) or (monthnum2 == 12):
        return True
    else:
        return False