PROGRAMMING:Remove duplicate characters
This problem requires the preparation of procedures, the given string after removing the repeated characters, in accordance with the ASCII sequence of characters from small to large sorted output.
###Input format:
The input is a non empty string (less than 80 characters) ending with carriage return.
###Output format:
Output the result string after de reordering.
###Input example:
```in
ad2f3adjfeainzzzv
```
###Output example:
```out
23adefijnvz
```
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 result string after de reordering.
###Input example:
```in
ad2f3adjfeainzzzv
```
###Output example:
```out
23adefijnvz
```
answer：If there is no answer, please comment