#include <stdio.h>
void main()
{
	int n,b,s,g,t;
	scanf("%d",&n);
	b=n/100;
	s=n%100/10;
	g=n%10;
	if(b>s){
		t=b;
		b=s;
		s=t;
	}	
	if(s>g){
		t=s;
		s=g;
		g=t;
	}
	if(b>s){
		t=b;
		b=s;
		s=t;
	}
	if(b==0){
		t=b;
		b=s;
		s=t;	
	}
	printf("%d",b*100+s*10+g);
}
/**************************************************************
	Problem: 1243
	User: admin
	Language: C
	Result: Accepted
	Time:8 ms
	Memory:1144 kb
****************************************************************/