#include<bits/stdc++.h>
using namespace std;
int main(){
   int c,k;
   cin>>c;
   if(c%2==0){
   	cout<<"y e s";
   } 
  	else cout<<"n o";
   }
/**************************************************************
	Problem: 1033
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/