#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: linyuhang
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/