#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,a,b,c;
    cin>>n;
    a=n%10;
    b=n/10%10;
    c=n/100%10;
    if(a>b) swap(a,b);
    if(a>c) swap(a,c);
    if(b>c) swap(b,c);
    if(a==0) swap(a,b);
    if(a==0) swap(a,c);
    cout<<a*100+b*10+c*1;
}
/**************************************************************
	Problem: 1243
	User: baizhoudeyueguang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/