
int main()
{
	int a,b,c,d,e,n,m;
	scanf("%d",&n);
	a=n/10000;
	b=n/1000;
	c=n/100;
	d=n/10;
	e=n/1;
	if(a>0)
	{
		printf("00001");
	}
	else if(b>0)
	{
		c=(n-b*1000)/100;
		d=(n-b*1000-c*100)/10;
		e=n-b*1000-c*100-d*10;
		printf("%d%d%d%d",e,d,c,b);
	}
	else if(c>0)
	{
		d=(n-c*100)/10;
		e=n-b*1000-c*100-d*10;
		printf("%d%d%d",e,d,c);
	}
	else if(d>0)
	{
		e=n-d*10;
		printf("%d%d",e,d);
	}
	else 
	{
		printf("%d",e);
	}
	return 0;
}