class IPAdress:

    def __init__(self, adresse):
        self.adresse = adresse
    
    def GetOctet(self, place):
        if place < 0 or place > 3:
            return None
        return self.adresse.split(".")[place]
    
    def ListeOctet(self):
        return self.adresse.split(".")
    
    def estReservee(self):
        return