void main()
{
	int n,a,b,c,d,e,place;
	scanf("%d",&n);
	if (n>9999)
		place=5;
	else 
     if (n>999)
		place=4;
 else if (n>99)
		place=3;
else  if (n>9 )
		place=2;
else place=1;
a=n/10000;
b=(n-10000*a)/1000;
c=(n-10000*a-1000*b)/100;
d=(n-10000*a-1000*b-100*c)/10;
e=n%10;
switch (place)
{
case 1: printf("%d",e); break;
case 2: printf("%d%d",e,d); break;
case 3: printf("%d%d%d",e,d,c); break;
case 4: printf("%d%d%d%d",e,d,c,b); break;
case 5: printf("%d%d%d%d%d",e,d,c,b,a); break;
}
}