#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a,b,c,x;
	cin>>n;
	a=n%10;
	b=n/10%10;
	c=n/100;
	if(b>a){
		swap(b,a);
	}
	if(c>a){
		swap(c,a);
	}
	if(c>b){
		swap(c,b);
	}
	x=a*100+b*10+c;
	cout<<x;
	
}

/**************************************************************
	Problem: 1042
	User: zhengzihao3
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/