digit_swap.cpp

//digit swap
#include<iostream>
#include<algorithm>
#include<vector>
#include<set>
#include<unordered_set>
#include<cmath>
#include<climits>
#include<queue>
#include<map>

#define FOR(i,a,b) for(int i = a; i < b; i++)
#define FORD(i,a,b) for(int i = a; i >= b; i--)
#define FORE(i,a,b) for(int i = a; i <=b; i++)
#define SIZE(x) x.size()
#define vi vector<int>
#define usi unordered_set<int>
#define si set<int>
#define MOD 0x3b9aca07

using namespace std;


int main(){

    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    string input;
    cin >> input;

    FORD(i,1,0){
        cout << input[i];
    }
    cout << endl;

    return 0;
}