#include <bits/stdc++.h> using namespace std;

int main() { int a, b, c; cin >> a; b = a / 10; c = a % 10; cout << c * 10 + b; return 0; }

#include<bits/stdc++.h>
using namespace std;

int main(){
    int n,b,c;
    cin>>n;
    b=n%10;
    c=n/10;
    if(b!=0)
        cout<<b<<c;
    else 
        cout<<c;
    return 0;
}