int main ( )
{
	int i, j, n, t, m;
	char a[1][5];                    /*????????*/
	cin.get(a[0],5);                 /*???????*/
	n = strlen(a[0]);
	for (i = 0,j = n-1;i < j;i++,j--)/*?????????*/
	{
		t = a[0][i];
		a[0][i] = a[0][j];
		a[0][j] = t;
	}
	for (m = 0;m < n;m++)            /*????????????*/
		cout <<a[0][m];
	return 0;
}