#!/usr/bin/env python

data = """
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"""

import sys

n1 = None
hexchars = "0123456789ABCDEF"

for c in data:
    if c not in hexchars:
        continue

    if n1 is None:
        n1 = hexchars.index(c)
    else:
        b = (n1 << 4) | hexchars.index(c)
        sys.stdout.write(chr(b))
        n1 = None