#include<bits/stdc++.h> 
using namespace std;
int main(){
	int a;
	cin>>a;
	if(a%2==0) 
	    cout<<"y e s";
	else
	    cout<<"n o";	   
		 
	return 0;
}
/**************************************************************
	Problem: 1033
	User: cyp
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/