#include <bits/stdc++.h>

using namespace std;

int main(){
	int t,n,a,b,c;
	cin>>n;
	a=n/100;
	b=n/10%10;
	c=n%10;
	if(a>b){
		t=a;
		a=b;
		b=t;
	}
	
	if(b>c){
		t=c;
		c=b;
		b=t;
	}
	
	if(a>b){
		t=a;
		a=b;
		b=t;
	}
	
	if(a==0&&b==0){
		cout<<c*100+a*10+b<<endl;
	}
	else if(a==0){
		cout<<b*100+a*10+c<<endl;
	}
	else{
		cout<<a*100+b*10+c<<endl;
	}
}
/**************************************************************
	Problem: 1243
	User: admin
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/