import sys class IPaddress: def __init__(self,num1,num2,num3,num4): self.num1 = num1 self.num2 = num2 self.num3 = num3 self.num4 = num4 Acount,Bcount,Ccount,Dcount,Ecount,Miscount,personcount = 0,0,0,0,0,0,0 def justIPmask(ip): str1 = '' for i in ip: str1 += bin(i)[2:].zfill(8) if str1[0] == '0': re...