#include<iostream>
#include<string>
#include<stack>
using namespace std;
int main()
{
char c;
int i=0;
stack<char> car;
while(cin>>c)
{
car.push(c);
}
i = car.size();
while(i--)
{
cout << car.top();
car.pop();
}
}
#include<string>
#include<stack>
using namespace std;
int main()
{
char c;
int i=0;
stack<char> car;
while(cin>>c)
{
car.push(c);
}
i = car.size();
while(i--)
{
cout << car.top();
car.pop();
}
}