#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: xiaojingxuan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/