PROGRAMMING:Task 10-01-04 case reversal
Task 10-01-04 case reversal
###Task description
```
Replace all uppercase letters in a string with lowercase letters, and replace lowercase letters with uppercase letters.
```
###Input format:
```
Enter one line: the string to be interchanged.
```
###Output format:
```
Output a line: complete the interchange string (string length less than 80).
```
###Input example:
```in
If so, you already have a Google Account. You can sign in on the right.
```
###Output example:
```out
iF SO, YOU ALREADY HAVE A gOOGLE aCCOUNT. yOU CAN SIGN IN ON THE RIGHT.
```
###Title Source
This topic is selected from openjudge website http://noi.openjudge.cn/ch0107/14/
answer：If there is no answer, please comment
###Task description
```
Replace all uppercase letters in a string with lowercase letters, and replace lowercase letters with uppercase letters.
```
###Input format:
```
Enter one line: the string to be interchanged.
```
###Output format:
```
Output a line: complete the interchange string (string length less than 80).
```
###Input example:
```in
If so, you already have a Google Account. You can sign in on the right.
```
###Output example:
```out
iF SO, YOU ALREADY HAVE A gOOGLE aCCOUNT. yOU CAN SIGN IN ON THE RIGHT.
```
###Title Source
This topic is selected from openjudge website http://noi.openjudge.cn/ch0107/14/
answer：If there is no answer, please comment