#include<iostream>
using namespace std;
int main(){
	int x;
	cin>>x;
	if(x%2==0){
		cout<<"y e s"<<endl;
	}else{
		cout<<"n o"<<endl;
	}
}

	

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