package main
import (
"fmt"
"sort"
)
func main() {
var str string
var strs []string
fmt.Scanf("%s", &str)
//转为字符数组
for _, v := range str {
strs = append(strs, string(v))
}
//排序
sort.Strings(strs)
//输出
for _, v := range strs {
fmt.Printf("%s", v)
}
}

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