#include <vector>
#include <iostream>
using namespace std;
int main()
{
	vector<char> lol,final; char num;
	while(!cin.eof())
	{
		cin.get(num);
		lol.push_back(num);
	}
	int i=lol.size();
while(i>=0){
final.push_back(lol[i]);
i--;}
}