#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(s>g){
		swap(s,g);
	}
	if(b>g){
		swap(b,g);
	}
	if(b>s){
		swap(s,b);
	}
	{
		h=b*100+s*10+g;
		cout<<h<<endl;
	}
}
/**************************************************************
	Problem: 1243
	User: xiaojingxuan
	Language: C++
	Result: Wrong Answer
****************************************************************/