import sys
# from pprint import pprint

lines = [ line.strip()[10:58].split() for line in sys.stdin ]
words = [ chr(int(word, 16)) for line in lines for word in line ]
headers, content = ''.join(words).split('\r\n\r\n')

print "Headers:\n\n{}\n\n<Content {} bytes hidden>".format(headers, len(content))