void main()
{
	int b,ch,i,a[5];
	i=0; 
	b=0;

	while ((ch=getchar())!='\n')
	{
		a[i]=ch-48;
		i++;
		b++;
	}

	for (i=b-1;i>=0;i--)
		printf("%d",a[i]);

	
}
