#include<stdio.h>
	void exchange(int *x,int *y,int *z);
	int main()
	{
		int a,b,c;
		scanf("%u%u%u",&a,&b,&c);
		exchange(&a,&b,&c);
		printf("%u%u%u\n",a,b,c);
		return 0;
	}
	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;}
	}