#python 字符串翻转
 
 

  string="how are you"
 
 

  def func(s):
 
 

      i=1
 
 

      re=""
 
 

      for x in s:
 
 

          re+=s[len(s)-i]
 
 

          i=i+1
 
 

      return re
 
 

          
 
 

  print func(string)