#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: xuezihong1
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/