import sys, re

class IP:
    def __init__(self, input_str):
        try:
            ip, netmask = input_str.split("/")
        except:
            return None
    
        if not re.match('\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}', ip):
            return None

        if not re.match('\d{1,2}', netmask):
            return None

        octects = [ int(o) for o in ip.split(".") ]
        for o in octects:
            if not 0 <= o <= 255:
                return None

        netmask = int(netmask)
        if not 0 <= netmask <= 32:
            return None

        self.ip = ip
        self.netmask = netmask
        self.octects = octects

    def print_network_address(self):
        masks,masks_inverted = [], []
        for i in range(4):
            masks.append(int((("1" * self.netmask + "0" * (32 - self.netmask))[i*8:(i+1)*8]), 2))
            masks_inverted.append(int((("0" * self.netmask + "1" * (32 - self.netmask))[i*8:(i+1)*8]), 2))
        print('{:>21}'.format("Subnet Address:   "), end='')
        for i in range(3):
            print(self.octects[i] & masks[i], end='.')
        print(self.octects[3] & masks[3])
        print("Broadcast Address:   ", end='')
        for i in range(3):
            print(self.octects[i] | masks_inverted[i], end='.')
        print(self.octects[3] | masks_inverted[3])
 

if len(sys.argv) == 2:
    try:
        my_ip = IP(sys.argv[1])
        my_ip.print_network_address()
    except AttributeError:
        print("\nHelp:")
        print("\n\tip-subnet.py IP_Address\CIDR_Notation")
        print("\tExample: ip-subnet.py 192.168.137.89/27")
        sys.exit(1)
else:
        print("\nHelp:")
        print("\n\tip-subnet.py IP_Address\CIDR_Notation")
        print("\tExample: ip-subnet.py 192.168.137.89/27")
        sys.exit(1)