int main()
{
	int n,a,b,c,d,e;
	cin>>n;
	a=n/10000;
	b=(n-10000*a)/1000;
	c=(n-a*10000-b*1000)/100;
	d=(n%100)/10;
	e=n%10;
	if(a!=0)
		cout<<e<<d<<c<<b<<a<<endl;
	else
		if(b!=0)
			cout<<e<<d<<c<<b<<endl;
		else
			if(c!=0)
				cout<<e<<d<<c<<endl;
			else
				if(d!=0)
					cout<<e<<d<<endl;
				else
					cout<<e<<endl;
	return 0;
}



