#include<bits/stdc++.h>
using namespace std;
double a;
int main(){
    int n,m,k=0,j;
    cin>>n;
    if(n%2==0){
        cout<<"y e s";
    }else{
        cout<<"n o";
    }
//  printf("%.1f\n",a); 
}
/**************************************************************
	Problem: 1033
	User: wangyichen2
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/