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

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