#! /usr/bin/env python

import sys

def hex_chr(ch):
    if ((ch >= '0') & (ch <= '9')):
        return ord(ch) - ord('0')
    if ((ch >= 'a') & (ch <= 'f')):
        return ord(ch) - ord('a') + 0x0a
    if ((ch >= 'A') & (ch <= 'F')):
        return ord(ch) - ord('A') + 0x0A
    
def gdb_char(str):
    _hex = (hex_chr(str[0]) << 4) | hex_chr(str[1])
    return chr(_hex)

if len(sys.argv) == 1:
    gdb_string = "$O5B6379675F6E65745F696E69745D20496E69743A206D62696E69742830783030303030303030290A#60"
    gdb_string = "$O464C4153482049443A2030312032323765203232313320323230310A#98"
    gdb_string = "$O68616C5F6D7063383378785F6932635F7075745F62797465732E3333370A#33"
else:
    gdb_string = sys.argv[1]
    
human_string = ""

gdb_string = gdb_string[2:] # Strip $O

while gdb_string[0] != '#':
    human_string += gdb_char(gdb_string[0:2])
    gdb_string = gdb_string[2:]

print human_string