#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	if(n%2==0) {
		cout<<"y e s";
    }else{
    	cout<<"n o";
    }
}
/**************************************************************
	Problem: 1033
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/