#include<iostream>
using namespace std;

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