#include <bits/stdc++.h>
using namespace std;
int t,n,a,b,c;
int main(){
    cin>>n;
    a=n/100;
    b=n/10%10;
    c=n%10;
    if(a>b){
        t=a;
        a=b;
        b=t;
    }
    if(b>c){
        t=c;
        c=b;
        b=t;
    }
    if(a>b){
        t=a;
        a=b;
        b=t;
    }
    if(a==0&&b==0) cout<<c*100+a*10+b<<endl;
    else if(a==0) cout<<b*100+a*10+c<<endl;
    else cout<<a*100+b*10+c<<endl;
}
/**************************************************************
	Problem: 1243
	User: liyunshuo
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/