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#!/usr/bin/env python
import sys
from itertools import product
def to_ipv4(str):
return [".".join(xs)
for xs
in ([str[:i], str[i:i+j], str[i+j:i+j+k], str[i+j+k:]]
for i, j, k
in product([1, 2, 3], repeat=3))
if all(is_valid(x) for x in xs)]
def is_valid(s):
return s and (s == "0" or not s.startswith("0")) and (0 <= int(s) <= 255)
input_str = "25525511135" if len(sys.argv) < 2 else sys.argv[1]
for addr in to_ipv4(input_str):
print(addr)
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