#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,l,k,j; 
	cin>>x;
	l=x%10;
	k=x/10%10;
	j=l*10+k;
	cout<<j;
}
/**************************************************************
	Problem: 1707
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/