PROGRAMMING:Character queuing
This problem requires the preparation of procedures, the given string of characters, in accordance with the ASCII code order from small to large sort output.
###Input format:
The input is a non empty string (less than 80 characters) ending with carriage return.
###Output format:
Output the sorted result string.
###Input example:
```in
ebE? nine
```
###Output example:
```out
9? Ebe
```
answer：If there is no answer, please comment
###Input format:
The input is a non empty string (less than 80 characters) ending with carriage return.
###Output format:
Output the sorted result string.
###Input example:
```in
ebE? nine
```
###Output example:
```out
9? Ebe
```
answer：If there is no answer, please comment