
int main()

{
	int n,a,b,c,d,place;
	scanf("%d",&n);
	if(n>=1000)
		place=4;
    else if(n>99)
		place=3;
    else if(n>9)
		place=2;
	else
		place=1;
	 a=n/1000;
	 b=(int)(n-a*1000)/100;
	 c=(int)(n-a*1000-b*100)/10;
	 d=(int)n%10;
	switch(place)
	{
	case 4:
		printf("%d%d%d%d\n",d,c,b,a);
		break;
    case 3:
		printf("%d%d%d\n",d,c,b);
		break;
    case 2:
		printf("%d%d\n",d,c);
		break;
	case 1:
		printf("%d\n",d);
		break;
	}
	return 0;
}