#include<iostream>
using namespace std;

int main()
{
	char str,k[100];
	int i = 0;
	while (cin >> str)
	{
		if (str == '\n')
		{
			break;
		}
		k[i] = str;
		i++;
	}
	for (int j = i - 1; j >= 0; j--)
	{
		cout << k[i];
	}
	cout << endl;
	return 0;;
}