#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,g,s;
	cin>>n;
	g=n/1%10;
	s=n/10%10;
	cout<<g*10+s;
	return 0;
}

/**************************************************************
	Problem: 1625
	User: zhangailin
	Language: C++
	Result: Wrong Answer
****************************************************************/