题解 | #图片整理#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        char[] chars = line.toCharArray();
        Arrays.sort(chars);
        for (char c : chars) {
            System.out.print(c);
        }
    }
}