题解 | #图片整理#

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void async function () {
    const list = (await readline()).split("");
    // list.sort();//给我整得不好意思用内置sort
    for(let i = 0; i < list.length; i++){
        for(let j = i+1; j < list.length; j++){
            if(list[i] > list[j]) [list[i],list[j]]=[list[j],list[i]]
        }
    }
    console.log(list.join(""));
}()