#include <iostream>
#define MAX_SIZE 100

int main()
{
	char c;
	int i = 0, j;
	char save[MAX_SIZE];

	do
	{
		if (i == MAX_SIZE)
		{
			cout << "ERROR:  Your string is too long\n";
			exit;
		}
		cin.get(c);
		save[i++] = c;
	} while (c != '\n');

	for (j=i-2;j>=0;--j)
	{
		cout << save[j] ;
	}
	cout << endl;
}