#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: caiqiaoxi
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/