#include<stdio.h>
void exchange(int *x,int *y,int *z);
void main()
{
	int a,b,c;
	scanf("%u%u%u",&a,&b,&c);
	exchange(&a,&b,&c);
	printf("%u%u%u\n",a,b,c);
}
void exchange(int *x,int *y, int *z)
{
	int t;
	if(*x<*y)
	{t=*x;*x=*y;*y=t;}
	if(*x<*z)
	{t=*x;*x=*z;*z=t;}
	if(*y<*z)
	{t=*y;*y=*z;*z=t;}
}