题解 | #图片整理#

import java.util.*;

//直接转换成字符数组排序

public class Main {
    public static void main(String[] args) {
      Scanner in = new Scanner(System.in);
	  String s=in.nextLine();

	  
        char[] chars=s.toCharArray();
        Arrays.sort(chars);
        for(char c:chars){
            System.out.print(c);
        }
    }
}