#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,g,s,b;
    cin>>n;
    g=n%10;
    s=n/10%10;
    b=n/100;
    if(g>s) swap(g,s);
    if(g>b) swap(g,b);
    if(s>b) swap(s,b);
    if(g==0){
        swap(g,s);
    }
        cout<<b+s*10+g*100<<endl;
}
/**************************************************************
	Problem: 1631
	User: tonghuawei
	Language: C++
	Result: Wrong Answer
****************************************************************/