#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: 1243
	User: sucongyi
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/