#include<iostream>
using names space std;

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