text: rawString = "I Love You!"
  
  print("请输入要反向加密的语句：")
  rawString = input("请输入：")
  
  def reverseCipher(rawString):
      strLength = len(rawString)
      reversedString = ''
      while strLength > 0:
          reversedString += rawString[strLength - 1]
          # print(reversedString)
          strLength -= 1
      
      return reversedString
  
  print("反向加密结果为：")
  print(reverseCipher(rawString))