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#!/usr/bin/env python
# -*- coding: UTF-8 -*-
#
"""
i have a list like this: [['10', '68', '12', '13'], ['10', '68', '14', '22'], ...]
in that list, i want to insert .0 and .255 every time the third octet changes.
in this example i would like to insert 10.68.12.0 before the first
entry and 10.68.12.255 after the first entry... then similar to the
next entry since its 3rd octet has gone from 12 to 14. any idea how?
i can't make it work
"""
Input = r"""
010.068.016.001 
010.068.016.007 
010.068.016.010 
010.068.016.012 
010.068.016.014 
010.068.016.015 
010.068.010.005 
010.068.010.010 
010.068.010.002 
010.068.017.012 
010.068.017.020 
010.068.017.240
"""

List= [ map(int,ip.split('.')) for ip in Input.splitlines() if ip.strip() ]
OldKey=""
OldData=[]
NewList = []
for ip in List:
    Key = str(ip[:3])
    Data = ip[:3]
    if Key == OldKey:
        NewList.extend([ip])
    else:
        Front = ip[:3]
        End =  OldData
        Front.append(0)
        End.append(255)
        if OldKey:
            NewList.extend([End, Front, ip])
        else:
            NewList.extend([Front, ip])
        OldKey = Key
        OldData = Data
OldData.append(255)
NewList.extend([OldData])
# NewList.sort()
print "\n".join(map(str,NewList))