#Reverse Cipher

 message = 'there can keep a secret,if two of them are dead.'

 translated = ''

 i = len(message)-1

 while i >= 0:

     translated = translated + message[i]

     i = i-1

 print  translated

>>>C:\Python27\python.exe E:/Python/密码学编程/5.py

.daed era meht fo owt fi,terces a peek nac ereht

Process finished with exit code 0