#include <bits/stdc++.h>
using namespace std;
long long q;
int main(){
      cin>>q;
	  if(q%2==0){
	  	cout<<"y e s";
	  } 
      else{
      	cout<<"n o";
      }
   }
/**************************************************************
	Problem: 1033
	User: chenyichuen
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/