#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,g,s,b,h;
	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);
    if(g==0) swap(g,b);
	{
		h=b*100+s*10+g;
		cout<<h<<endl;
	}
}
/**************************************************************
	Problem: 1243
	User: xiaojingxuan
	Language: C++
	Result: Wrong Answer
****************************************************************/