#include<bits/stdc++.h>
using namespace std;
int main(){
    string s,k;
    cin>>s;
    for(int i=s.size();i>=0;i--){
    	cout<<s[i];
    }
    
    return 0;
}
/**************************************************************
	Problem: 1120
	User: linyuhang
	Language: C++
	Result: Wrong Answer
****************************************************************/