#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b;
	cin>>a;
	b=a%2;
	if(b==0){
		cout<<"y e s";
	}
	else{
		cout<<"n o";
	}
} 
/**************************************************************
	Problem: 1033
	User: zengyixuan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/