#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(n%2==0) cout<<"y e s";
    else cout<<"n o";
     
     
}
/**************************************************************
	Problem: 1033
	User: chenmingyu
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/