题解 | #图片整理#

package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"strings"
)

func main() {
	in := bufio.NewReader(os.Stdin)
	var str string
	fmt.Fscan(in, &str)
	arr := strings.Split(str, "")
	sort.Strings(arr)
	fmt.Println(strings.Join(arr, ""))
}