int main()
{
	int n,a,b,c,d,e,sum,m;
	scanf("%d",&n);
	a=n%10;
	b=(n%100-a)/10;
	c=(n%1000-n%100)/100;
	d=(n%10000-n%1000)/1000;
	e=(n%100000-n%10000)/10000;
	sum=10000*a+1000*b+100*c+10*d+e;
	if(sum%10000==0)
		m=sum/10000;
	else if(sum%1000==0)
		m=sum/1000;
	else if(sum%100==0)
		m=sum/100;
	else if(sum%10==0)
		m=sum/10;
	else
		m=sum;
	printf("%d\n",m);
	return 0;
}

