#include<bits/stdc++.h>
using namespace std;
int a,b,c,d,e; 
int main(){
	scanf("%d",&a);
	b=a/100;
	c=a/10%10;
	d=a%10%10;
	if(b>=c&&c>=d)
	e=b*100+c*10+d;
	else if(b>=d&&d>=c)
	e=b*100+d*10+c;
	else if(c>=b&&b>=d)
	e=c*100+b*10+d;
	else if(c>=d&&d>=b)
	e=c*100+d*10+b;
	else if(d>=b&&b>=c)
	e=d*100+b*10+c;
	else if(d>=c&&c>=b)
	e=d*100+c*10+b;
	printf("%d",e);
	return 0;
}

/**************************************************************
	Problem: 1042
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2076 kb
****************************************************************/