#include<bits/stdc++.h>
using namespace std;
int a;
int main(){
	cin>>a;	
	if(a % 2 == 0){
	cout<<"y e s"<<endl; 	
	}else{
	cout<<"n o";	
	}
	return 0;
}
/**************************************************************
	Problem: 1033
	User: huanghao
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/