#include <bits/stdc++.h>
using namespace std;
int main()
{
int a;
cin>>a;
if (a%2==0){
	cout<<"y e s"<<endl;
}else{
		
	cout<<"n o"<<endl;	
}
return 0;

}

/**************************************************************
	Problem: 1033
	User: mc002
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/