#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,n;
    cin>>n;
    a=n%10;
    b=n/10%10;
	cout<<a*10+b;
}
/**************************************************************
	Problem: 1707
	User: sucongyi
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/