题解 | #图片整理#

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String str = in.nextLine();
        char[] c = new char[str.length()];
        c = str.toCharArray();
        Arrays.sort(c);
        for(char ch:c){
            System.out.print(ch);
        }
    }
}