#include<bits/stdc++.h>
using namespace std;
int main(){
   int m;
   cin>>m;
   if(m%2==0){
      cout<<"y e s";
   }else{ 
      cout<<"n o";
   }
   return 0;

}

/**************************************************************
	Problem: 1033
	User: zhuangsongyu
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2072 kb
****************************************************************/