void main()
{
	int n,a,b,c,d,e,f;
	scanf("%d",&n);
	a=n/10000;
	b=n/1000-a*10;
	c=n/100-a*100-b*10;
	d=n/10-a*1000-b*100-c*10;
	e=n-a*10000-b*1000-c*100-d*10;
	if(a!=0)
	f=e*10000+d*1000+c*100+b*10+a;
	else
		if(b!=0)
		f=e*1000+d*100+c*10+b;
		else
			if(c!=0)
				f=e*100+d*10+c;
			else
				if(d!=0)
				f=e*10+d;
				else
				f=e;
	printf("%d",f);
}
			    
