#include<bits/stdc++.h>
using namespace std;
// write your code here......
void reverseString(string&s){
    int left=0;
    int right=s.size()-1;
    while(left<right){
    swap(s[left],s[right]);
    left++;
    right--;
    }
}
int main(){
    string s;
    getline(cin,s);
    // write your code here......
    reverseString(s);
    cout<<s<<endl;
    return 0;
}