#include<iostream>
using namespace std;

void age_eligiblity(int age){
    if(age>=18){
        cout<<"Eligible";
    }
    else if(age<18){
        cout<<"Not eligible";
    }
    else{
        cout<<"Invalid input";
    }
}
int main(){
    int age;
    cin>>age;
    age_eligiblity();
    return 0;
}