import sys
import re
fp = open('20140827_target2.txt','r')
buffer = fp.read()
fp.close()
fp = open('20140827_result2.txt','w')
count = 1
test = re.findall('[a-zA-Z0-9]{2}',buffer)
t = []
for i in test:
if count % 2 == 1:
#t.append(int(i,16) - int('b5',16))
try:
#print chr(int(i,16) - int('b5',16))
t.append(chr(int(i,16) + int('4b',16)))
except:
pass
else:
try:
#print chr(int(i,16) - int('c6',16))
t.append(chr(int(i,16) + int('3a',16)))
except:
pass
count = count + 1
for i in t:
fp.write(i)
print i
fp.close()