#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: wangjinming
	Language: C
	Result: Compile Error
****************************************************************/