#include<bits/stdc++.h>
using namespace std;
int main(){	
int n,g,s,b,x;
cin>>n; 
g=n/1%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);
//cout<<g<<" "<<s<<" "<<b;  
-
cout<<b*100+s*10+g;
	return 0;
}
/**************************************************************
	Problem: 1042
	User: lidongbo
	Language: C++
	Result: Compile Error
****************************************************************/