题目：AAoHAR1TIiIkUFUjUFQgVyInVSVQJVFRUSNRX1YgXiJSVyJQVRs=
写python脚本：
import base64
ciphertext="AAoHAR1TIiIkUFUjUFQgVyInVSVQJVFRUSNRX1YgXiJSVyJQVRs="
cipher=base64.b64decode(ciphertext)
for i in range(0,256):
result=""
for s in cipher:
result+=chr(ord(s)^i)
if "flag" in result:
print result
flag{5DDB63E62F1DA3C6C777E790F8D41D63}