box paint by hex

import os,re\x0d
s=os.read(0,1e5)\x0d
for i in range(99):s=re.sub(r"(?<= #) +(?=#)",lambda j:"."*len(j.group()),s,1)\x0d
print s\x0d

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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return top