#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: 1302
	User: chensijia
	Language: C++
	Result: Wrong Answer
****************************************************************/